Consulta: subjectFacets:"Fish larvae"
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Data/hora: 13/06/2024 14:22:50

Larval rearing and weaning of seabass, Lates calcarifer (Block), on experimental compounded diets
Provedor de dados: 5
Autores: Fuchs, Jacques; Nedelec, Georges.
Larval rearing trials of seabass larvae, either imported from Singapore or obtained from the captive broodstock of IFREMER/C.O.P. at Tahiti, were carried out since 1987, by testing different technologies originally used in South East Asia (green-water culture, sequential water changes) or developed by IFREMER for other species (clear water system, preys enrichment, continuous water renewal).
Tipo: Text
Palavras-chave: Lates calcarifer; Diets; Survival; Fish larvae; Brood stocks; Mortality; Pellet feeds; Artificial feeding; Swimming; Abnormalities; Swim bladder; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1433.pdf

Sur l'utilisation des criteres comportementaux pour determiner l'etat de sante et l'evolution probable des elevages de poissons marins. 1: Cas des prelarves et des larves de Diplodus sargus, Sparus aurata, Puntazzo puntazzo, Lithognatus mormyrus
Provedor de dados: 5
Autores: Kentouri, M; Divanach, P.
In aquaculture and particularly during fish larval rearing when the time between moment of stress application and the non-return point acquisition is very limited, criteria which may provide health state and stock evolution are of great importance. Now, in stress responce chronology, the specific behavioral scheme modification is first noted. This early identification, associated with initial conditions restoration, generaly do not involve after effects. Ethological knowledge beeing the basis of this for-casting strategy, the authors define in this study a simplified behavioral scheme of four sparid larval species in a range of physiological conditions.
Tipo: Text
Palavras-chave: Lithognathus mormyrus; Puntazzo puntazzo; Sparus aurata; Diplodus sargus; Sparidae; Pisces; Prediction; Biological stress; Ethology; Fish larvae; Pathology.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1255.pdf

Evaluating the histological-based condition of wild collected larval fish: A synthetic approach applied to common sole (Solea solea)
Provedor de dados: 5
Autores: Di Pane, Julien; Gendrot, F.; Giraldo, Carolina; Marchal, Paul; Koubbi, Philippe; Loots, Christophe.
In the present study, the histological-based condition of common sole (Solea solea) larvae in the English Channel was evaluated to assess the relevance of experimentally-calibrated indices for wild collected specimens. Based on topographical observation of foregut, midgut, hindgut, liver and pancreas, each of the 202 larvae analysed was attributed one of the six grades of a condition index that was developed for sole in the nineties. In parallel, a synthetic table of 20 criteria historically used as condition indicators was created from an extensive review of the literature. These criteria were related to tissular integrity, cells height, nuclei, presence of prey and vacuolisation of the same five target organs. For each larva, each criterion was scored on...
Tipo: Text
Palavras-chave: Condition index; Eastern English Channel; Fish larvae; Histology; Solea solea; Starvation.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00601/71325/69754.pdf

Production of live prey for marine fish larvae
Provedor de dados: 5
Autores: Kraul, S.
Tropical marine fish larvae vary in their requirements for live planktonic food. Selection of live prey species for culture depends on larval size and larval tolerance of water quality. This report describes some of the cultured prey species, and their uses and limits as effective food for fish larvae. Methods are presented for the culture of phytoplankton, rotifers, copepods, and other live feeds.
Tipo: Text
Palavras-chave: Brine shrimp culture; Diets; Prey selection; Food organisms; Feeding; Growth; Rearing; Nutritional requirements; Fish larvae; Marine fish; Tropical fish.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1443.pdf

Dietary modulation of some digestive enzymes and Metabolic processes in developing marine fish: Applications to diet formulation
Provedor de dados: 5
Autores: Zambonino, Jose-luis; Cahu, Chantal.
During these last 20 years, many studies have focussed on the development of the digestive tract in marine fish larvae. Most of the studies aimed at acquiring knowledge on the optimal form of dietary supply for different nutrients, in order to formulate a compound diet able to totally replace live preys in the fish larvae feeding sequence. Consequently, most of the studies aimed at describing the effect of dietary adaptation on digestive enzymes profile, the morphology of the main organs, while others aspects of the physiology of the larvae digestive tract (gut hormones, intestinal transport...) were poorly investigated.   This review reports the more recent data on dietary modulation of digestive enzymes with a particular emphasis, when possible, on the...
Tipo: Text
Palavras-chave: Nuclear receptors; Digestive enzymes; Fatty acids; Vitamins; Dietary proteins and lipids; Fish larvae.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3045.pdf

Influence of dietary phospholipids on early ontogenesis of fish
Provedor de dados: 5
Autores: Cahu, Chantal; Gisbert, Enric; Villeneuve, Laure A. N.; Morais, Sofia; Hamza, Neila; Wold, Per-avid; Zambonino, Jose-luis.
The aim of this paper is to provide explanations of how dietary phospholipid (PL) globally improves fish larval development, including growth and survival, digestive functions and skeletal development, and to propose optimal PL levels and sources in fish larval diets. Dietary incorporation of 8-12% PL related to dry matter (d.m.) promotes growth and enhanced survival in various species. Marine source PL, incorporating highly unsaturated fatty acids, was most efficient than soybean lecithin. This beneficial effect was explained by an enhancement in digestive functions, assessed by digestive enzyme activities and histomorphology. Nevertheless, 1.5-2.5% highly unsaturated fatty acids related to diet d.m. supplied by PL improved growth, survival and skeletal...
Tipo: Text
Palavras-chave: Gene regulation; Skeletal development; Digestive functions; Fish larvae; Phospholipid.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6460.pdf

Comparison of growth, digestive system maturation and skeletal development in sea bass larvae reared in an intensive or a mesocosm system
Provedor de dados: 5
Autores: Zouiten, Dora; Ben Khemis, Ines; Masmoudi, Ahmed Slaheddin; Huelvan, Christine; Cahu, Chantal.
The quality of development in intensive or mesocosm hatchery-reared Dicentrarchus labrax larvae was investigated using physiological indicators assessing ontogeny. Larvae were reared in intensive (120 L tanks) and in mesocosm systems (20 m(3) enclosures) with the same feeding sequence, excluding the wild zooplankton naturally available in mesocosms. Faster growth was recorded since early development [16 day after hatching (DAH)] in the mesocosm. Maturation of the digestive system also occurred earlier as indicated by the higher amylase secretion ratios, the intestinal maturation index (alkaline phosphatase/leucine-alanine peptidase and aminopeptidase-N/leucine-alanine peptidase ratios) and the more developed intestinal epithelium at 23 DAH. Nevertheless,...
Tipo: Text
Palavras-chave: Fish larvae; Hatchery; Mesocosm; Ontogenesis; Enzyme; Skeletogenesis.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00051/16225/14064.pdf

Effect of strong winds on the nutritional condition of anchovy (Engraulis encrasicolus L.) larvae in the Bay of Biscay, Northeast Atlantic, as inferred from an early field application of the DNA/C index
Provedor de dados: 5
Autores: Bergeron, Jean-pierre.
A new biochemical index was used to assess larval fish nutritional condition during a. survey cruise in the Bay of Biscay in early June 1993. This period corresponds to the breeding season of the European anchovy (Engraulis encrasicolus L.). The analysis of samples taken at grid points indicated a clear spatial pattern in nutritional condition, which increased from the middle shelf to the shelf edge. A relatively large fraction of the larval population proved to be in poor condition. Strong winds with speeds of 20-30 knots occurred during 3 d after the first survey and affected the vertical hydrological structure. During a subsequent survey, samples taken at approximately the same locations showed that anchovy larvae in all areas were in very poor...
Tipo: Text
Palavras-chave: Windstress; Nutritional condition; Fish larvae; European anchovy; DNA/C; Bay of Biscay.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/2000/publication-449.pdf

Larval Fish Swimming Behavior Alters Dispersal Patterns From Marine Protected Areas in the North-Western Mediterranean Sea
Provedor de dados: 5
Autores: Faillettaz, Robin; Paris, Claire B.; Irisson, Jean-olivier.
Most demersal fishes undergo a dispersal phase as larvae, which strongly influences the connectivity among adult populations and, consequently, their genetic structure and replenishment opportunities. Because this phase is difficult to observe directly, it is frequently simulated through numerical models, most of which consider larvae as passive or only vertically migrating. However, in several locations, including the Mediterranean Sea, many species have been shown to swim fast and orient. Here we use a Lagrangian model to study connectivity patterns among three Mediterranean Marine Protected Areas (MPAs) and compare simulations in which virtual larvae are passive to simulations in which oriented swimming is implemented. The parameterization of behavior...
Tipo: Text
Palavras-chave: Fish larvae; Behavior; Swimming; Connectivity; Dispersal; Mediterranean sea; Marine protected areas; Modeling.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00634/74618/74548.pdf

Bacteries associees aux production de Brachionus plicatilis
Provedor de dados: 5
Autores: Nicolas, Jean-louis; Joubert, M.
Bacteria associated with semi-continuous culture of Brachionus plicatilis , which is used as the first food of marine fish larvae, were counted on Zobell 2216 E medium and identified. The numbers of bacteria were very high in both Brachionus (about 10 super(11) bact. per ml of digestive content) and in water (from 1.6.10 super(6) to 4.7.10 super(7) bact. per ml). The cultures were studied at driving a time when mortalities occurred frequently. The introduction of a Pseudomonas) phenon at a proportion of about 50% to the dominant microflora persisted in time and was little influenced by diet. It has been the cause of the repression of the Vibrio, Aeromonas group which was found in an unusually small proportion. It induced a lack of microflora diversity and...
Tipo: Text
Palavras-chave: Brachionus plicatilis; Rotifera; Pseudomonas; Aeromonas; Vibrio; Nutrition; Pathology; Fish culture; Fish larvae; Food organisms; Bacteria; Continuous culture; Ecological associations; Zooplankton culture.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-994.pdf

Substitution of live food by formulated diets in marine fish larvae
Provedor de dados: 5
Autores: Cahu, Chantal; Zambonino, Jose-luis.
Until recently, it was considered impossible to feed newly hatched marine fish species with a compound diet. Substituting a compound diet for live prey was performed several weeks after hatching, depending on the species. Compound diets were well ingested at the early stage but larvae died with a gut full of food, suggesting that larvae were unable to digest the compound diet. The hypothesis was that younger larvae have insufficient digestive enzymes to thrive on compound diets, and that exogenous enzymes, provided from live prey, are necessary for early stages.The organogenesis of marine fish larvae is not completely achieved at hatching and histological studies have revealed that the anatomy of the digestive tract undergoes developmental changes over...
Tipo: Text
Palavras-chave: Protein; Phospholipid; Pancreatic enzymes; Microparticulate diet; Intestinal enzymes; Protein hydrolysate; Gut maturation; Fish larvae.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-447.pdf

Spatial patterns and GIS habitat modelling of Solea solea, Pleuronectes flesus and Limanda limanda fish larvae in the eastern English Channel during the spring
Provedor de dados: 5
Autores: Koubbi, Philippe; Loots, Christophe; Cotonnec, Gwenaelle; Harlay, Xavier; Grioche, Alain; Vaz, Sandrine; Martin, Canterbury Christ Church University; Walkey, Mike; Carpentier, Andre.
The spring distribution of larval fish stages of flatfishes in the Dover Strait (eastern English Channel) was studied in 1995 and 1999. Fish larvae were identified and sorted according to developmental stages in order to study their ontogenic distribution. The French coastal waters are characterised by an unstable tide-dependent front, which influences larval dispersion. In spring, the French coastal waters have a high phytoplanktonic production. They have higher temperatures, lower salinities and differences in current intensity compared with the central English Channel waters. Generalised Additive Models (GAM) combined with Geographic Information Systems (GIS) were used to model the potential habitats of life stages considering data from three major...
Tipo: Text
Palavras-chave: English Channel; Fish larvae; Geostatistics; GIS; GAM.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-2090.pdf

Influence of dietary live yeast on European sea bass (Dicentrarchus labrax) larval development
Provedor de dados: 5
Autores: Tovar Ramirez, Dariel; Zambonino-infante, Jose-luis; Cahu, Chantal; Gatesoupe, Joel; Vazquez Juarez, R.
Recent results have demonstrated that live yeast in diets improved gut maturation in sea bass larvae. In this study, we tested the absence and two levels of live yeast in sea bass larvae diets. Specimens were fed from time of mouth opening to 37 days after hatching a diet of 0%, 1.1%, or 5.7% wet weight of live yeast (Debaryomyces hansenii CBS 8339). Yeast incorporation improved survival 10%, and reduced malformed larvae. In groups fed 1.1% yeast, only 1% of larvae were malformed, compared to 14% in the control group. Final mean weight in groups fed 1.1% yeast was twice that of other groups. Activities and concentrations of mRNA trypsin and lipase were higher in the two groups fed yeast than in the control group, whereas activity and concentration of mRNA...
Tipo: Text
Palavras-chave: Polyamines; Lipase; Trypsin; Amylase; Enzymes; Gut maturation; Fish larvae.
Ano: 2004
URL: https://archimer.ifremer.fr/doc/2004/publication-831.pdf

Comparison of the effects of the dietary addition of two lactic acid bacteria on the development and conformation of sea bass larvae, Dicentrarchus labrax, and the influence on associated microbiota
Provedor de dados: 5
Autores: Lamari, Faouzi; Castex, Mathieu; Larcher, Thibaut; Ledevin, Mireille; Mazurais, David; Bakhrouf, Amina; Gatesoupe, Joel.
Probiotics may have many effects on health and development of fish larvae. One of the most promising is related to spinal conformation, though the mode of action is not clearly understood. The present study attempted to investigate the effects of two strains of lactic acid bacteria on associated microbiota, histological development and gene expression. Sea bass larvae were fed since 5 dph (day post hatch) with either a standard control diet (Diet C), or the same diet supplemented with Pediococcus acidilactici MA18/5M (Diet P), or with an autochthonous strain of Lactobacillus casei (X2; Diet L). The two lactic acid bacteria were incorporated in the diets at the levels of 106 and 107 CFU (colony forming units) g-1 in two consecutive experiments,...
Tipo: Text
Palavras-chave: Fish larvae; Probiotics; Microbiota; Histopathology; Gene expression; DGGE.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00108/21966/19673.pdf

Nutritional components affecting skeletal development in fish larvae
Provedor de dados: 5
Autores: Cahu, Chantal; Zambonino, Jose-luis; Takeuchi, Toshio.
Marine fish larvae undergo major functional and morphological changes during the developmental stages and several factors can interfere with the normal development of larvae and affect fry quality. Skeletal malformations, such as spinal malformation-scoliosis, lordosis, coiled vertebral column-, missing or additional fin rays, bending opercle or jaw malformations, are frequently observed in hatchery-reared larvae. This paper reviews the effects of some nutritional components on skeletal development in larvae of a number of fish species. In the dietary lipid fraction, for instance, it was proven that the phospholipid concentration affected the spinal malformation rate in sea bass fed a compound diet from mouth opening onwards. Phosphatidylinositol, in...
Tipo: Text
Palavras-chave: Retinoic acid; Ascorbic acid; Amino acid; Phospholipid; Peptides; Skeletal development; Quality; Fish larvae.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/publication-443.pdf

Comparison of dietary phospholipids and neutral lipids on skeletal development and fatty acid composition in Atlantic cod (Gadus morhua)
Provedor de dados: 5
Autores: Kjorsvik, Elin; Olsen, Cecilia; Wold, Per-arvid; Hoehne-reitan, Katja; Cahu, Chantal; Rainuzzo, Jose; Olsen, Atle Ivar; Oie, Gunvor; Olsen, Yngvar.
Dietary essential fatty acids may affect larval skeletal formation. The aim of this study was to compare effects on growth and osteological development of dietary docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) being incorporated in the phospholipid (diets PL1 and PL3) or in the neutral lipid (diet NL1) fraction of the larval diet for Atlantic cod (Gadus morhua). The diets were labelled according to the estimated percentage of total n-3 fatty acids contained in the dietary neutral lipid (NL1-1.3% of dietary dry matter) or in the phospholipid fraction (PL1-1.1% and PL3-2.3%). Larvae were weaned to the isoenergetic and isolipiclic microdiets from 17 days post hatching (dph). They were co-fed enriched rotifers until 24 dph and received thereafter...
Tipo: Text
Palavras-chave: DHA; EPA; Fatty acids; Phospholipids; Dietary requirements; Skeletal deformities; Osteological development; Fish larvae; Cod; Gadus morhua.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7417.pdf

Nutrition, digestion et développement des larves de crevettes et poissons marins
Provedor de dados: 5
Autores: Cahu, Chantal.
This report is presented by Chantal Cahu for obtaining accreditation to supervise research. Since 1981, her research activity has addressed the study of reproducers' nutrition and the young stages of development of marine organisms belonging to two different branch lines, crustaceans and fish. This work, performed in a base-lined research body, IFREMER, is placed within a more general programme of aquaculture development. Indeed, whatever species are at issue, the development of aquaculture in France, as at the global level, is based on the production of juveniles in hatcheries. My work has therefore more precisely the goal of acquiring knowledge about the nutritional needs, mechanisms of digestion and the development of these animals in order to improve...
Tipo: Text
Palavras-chave: Skeleton development; Vitamins; Nutriment; Fish larvae; Egg quality; Reproduction; Nutrition; Shrimp larvae; Peneids.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/rapport-2086.pdf

Dietary vitamin D-3 affects digestive system ontogenesis and ossification in European sea bass (Dicentrachus labrax, Linnaeus, 1758)
Provedor de dados: 5
Autores: Darias, Maria J.; Mazurais, David; Koumoundouros, Giorgos; Glynatsi, Nomiki; Christodoulopoulou, Stavroula; Huelvan, Christine; Desbruyeres, Elisabeth; Le Gall, Marie-madeleine; Quazuguel, Patrick; Cahu, Chantal; Zambonino-infante, Jose L.
The influence of dietary vitamin D-3 (VD3) on survival, growth and morphogenesis during the larval development of European sea bass (Dicentrarchus labrax) was evaluated until 45 days post hatching. Diets contained 4% of the standard vitamin mix (VM) recommended by the National Research Council (NRC) and incorporated 0, 19.2, 38.4, or 140 IU of VD3 per gram of diet to give VD-0, VD-1, VD-2 and VD-3 dietary treatments, respectively. The present study revealed for the first time an impact of dietary VD3 on the sea bass digestive system ontogenesis that consequently conditioned the ossification process and morphogenesis. All dietary VD3 levels were in the "adequate range" based on larval survival. Nevertheless, growth, intestinal maturation and ossification at...
Tipo: Text
Palavras-chave: Fish larvae; Ossification; Malformations; Vitamin D; Digestive system; Gene expression.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00000/11147/7849.pdf

Ontogeny of the gastrointestinal tract of marine fish larvae
Provedor de dados: 5
Autores: Zambonino, Jose-luis; Cahu, Chantal.
Marine fish larvae undergo major morphological and cellular changes during the first month of life. The ontogeny of the gastrointestinal tract combines these two aspects of the larval development and is very interesting in that the timing of functional changes appears genetically hard-wired. The goal of this paper is to give an overview of the gastrointestinal development process in marine fish larvae, with particular attention to three species: sea bass; red drum; and sole, since the description of gut maturation in fish larvae was initiated during the last decade with these species. During the early stages, marine fish larvae exhibit particular digestive features. Concerning the exocrine pancreas, amylase expression decreases with age from the third week...
Tipo: Text
Palavras-chave: Proteins; Pancreatic enzymes; Lipids; Larvae feeds; Intestinal enzymes; Glucides; Fish larvae; Enzyme expression; Digestion; Development; Aquaculture.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/2001/publication-650.pdf

Impacts of three different microdiets on Florida Pompano, Trachinotus carolinus, weaning success, growth, fatty acid incorporation and enzyme activity.
Provedor de dados: 5
Autores: Hauville, Marion; Zambonino, Jose Luiz; Bell, G; Migaud, Herve; Main, Kevan L.
In this study, three microdiets were tested on weaning of Florida pompano larvae: Otohime, Gemma and a reference diet LR803. The experimental system was stocked with 11-day-old larvae, which were co-fed micro-diets and live food from 11 dph to 17 dph then micro-diets only until 28 dph. Survival from 11 dph to 28 dph was similar for all treatments, with an average of 33%. At the end of the trial, the Gemma larvae were significantly longer and heavier than larvae fed the other diets. Significant differences were observed in fatty acid composition of the diets and larvae between treatments. The Gemma larvae incorporated the lowest amount of eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and arachidonic acid (ARA). However, they had the highest...
Tipo: Text
Palavras-chave: Enzyme; Fatty acids; Fish larvae; Microdiets; Trachinotus carolinus; Weaning.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00169/28067/26282.pdf

Recent changes in ichthyoplanktonic assemblages of the eastern English Channel
Provedor de dados: 5
Autores: Di Pane, Julien; Koubbi, Philippe; Giraldo, Carolina; Lefebvre, Valerie; Caboche, Josselin; Marchal, Paul; Loots, Christophe.
ish assemblages vary through time in both abundance and diversity, often due to changes in climate. The potential consequences of these changes on the larval phase need to be considered. In the Eastern English Channel, fish larvae of 30 taxa, from surveys conducted during spring in the nineties and in 2017 with bongo nets, were used to investigate seasonal and interannual changes in larval assemblages with different statistical tests and multivariate analyses (Outlying Mean Index, Principal Coordinate Analysis and variance partitioning). The major change observed was significant lower abundances in 2017 (in April and May) compared to the nineties. Most of the dominant taxa were two to three-fold less abundant in 2017 than the 1990s. We suggest that the...
Tipo: Text
Palavras-chave: Fish larvae; Temporal variations; Atlantic Multidecadal Oscillation; Outlying Mean Index; Variance partitioning; English Channel.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00604/71631/70078.pdf

Spatial distribution and interannual variations in the size frequency distribution and abundances of Pleuragramma antarcticum larvae in the Dumont d’Urville Sea from 2004 to 2010
Provedor de dados: 5
Autores: Koubbi, Philippe; O'Brien, Colleen; Loots, Christophe; Giraldo, Carolina; Smith, Martina; Tavernier, Eric; Vacchi, Marino; Vallet, Carole; Chevallier, Jean; Moteki, Masato.
This paper investigates the abundance and distribution of Pleuragramma antarcticum larvae by size class in the Dumont d’Urville Sea from 2004 to 2010. Samples were collected between Dumont d’Urville station and the Mertz Glacier Tongue onboard the RV l’Astrolabe for studying the inter-annual and spatial distribution of fish larvae and the TRV Umitaka Maru for looking at life stages vertical distributions. The seabed depression adjacent to the Mertz Glacier Tongue and in Commonwealth Bay hosted high abundances of small P. antarcticum larvae, while larger larvae were found in lower abundance and further offshore. We found that canyons, sea ice, stability of the water column and temperatures are important features for determining suitable areas for young...
Tipo: Text
Palavras-chave: Pleuragramma antarcticum; East Antarctic shelf; Fish larvae; Life cycle; Inter-annual variations.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00069/17992/15528.pdf

Ontogeny of the digestive tract of thick lipped grey mullet (Chelon labrosus) larvae reared in "mesocosms"
Provedor de dados: 5
Autores: Zouiten, Dora; Ben Khemis, I; Besbes, R; Cahu, Chantal.
This work describes the ontogeny of the digestive tract in thick lipped grey mullet (Chelon labrosus) larvae reared until day 36 post-hatching with the semi-extensive technology in mesocosms. Diet was constituted by live preys, rotifers, Arternia and wild zooplankton, then compound diet was added from day 20 (p. h.). Linear growth, weight growth and digestive enzymes specific activities were studied during larval ontogeny. Pancreatic enzymes (trypsin and amylase) and intestinal enzymes (leucine-alanine peptidase "Leu-ala", aminopeptidase N "AN" and alkaline phosphatase "AP") were assayed in larvae sampled throughout the rearing trial to evaluate gastrointestinal maturation along the development.   The trypsin specific activities were very high during the...
Tipo: Text
Palavras-chave: Pancreatic enzymes; Intestinal enzymes; Fish larvae; Mesocosm; Chelan labrosus.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4585.pdf

Pathology of marine warmwater finfish in Israel: Problems and research
Provedor de dados: 5
Autores: Colorni, A.
A condition in Sparus aurata larvae termed "distended gut syndrome" (DGS) has become a major problem in the past three seasons. Unable to digest rotifers and brine shrimp nauplii, the larvae develop a swollen abdomen, exhibit a disoriented spinning motion and are swept passively with the current. Bacterial or viral infections were suspected. Chloramphenicol-supplemented larval food did not affect the prevalence of DGS. Virus-like particles 80 nm in diameter were observed in necrotic cytoplasm of midgut wall cells.
Tipo: Text
Palavras-chave: Israel; Sparidae; Pisces; Sparus aurata; Fish diseases; Fish larvae; Pathology.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1479.pdf

Gene expression patterns during the larval development of European sea bass (Dicentrarchus labrax) by microarray analysis
Provedor de dados: 5
Autores: Darias, Maria J.; Zambonino, Jose-luis; Hugot, K; Cahu, Chantal; Mazurais, David.
During the larval period, marine teleosts undergo very fast growth and dramatic changes in morphology, metabolism, and behavior to accomplish their metamorphosis into juvenile fish. Regulation of gene expression is widely thought to be a key mechanism underlying the management of the biological processes required for harmonious development over this phase of life. To provide an overall analysis of gene expression in the whole body during sea bass larval development, we monitored the expression of 6,626 distinct genes at 10 different points in time between 7 and 43 days post-hatching (dph) by using heterologous hybridization of a rainbow trout cDNA microarray. The differentially expressed genes (n = 485) could be grouped into two categories: genes that were...
Tipo: Text
Palavras-chave: Sea bass; Gene expression; Microarray; Development; Fish larvae.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4344.pdf

Définition d'un modèle d'élevage larvaire intensif pour la daurade Sparus auratus
Provedor de dados: 5
Autores: Ounais-guschemann, Nadia.
This study defines rearing parameters for mass products of 30-day old post larvae. Continuous lighting (600 lux) optimizes the predatory activity and suppresses the feeding rhythm. For 4-5 mm larvae (15 days), food ingestion slows down if the prey concentration in the tank is below 5 rotifers/ml, while there is no such threshold for 6-7 mm larvae (22 days). The rotifer Brachionus plicatilis , between 100 and 200 mu m, is an adequate initial prey, it can be replaced by Artemia salina for 7-8 mm larvae (30 days). It is observed that free amino acids and essential fatty acids contents have a prominent role in larvae growth; docosahexaenoic acid (C22:6n-3) content could be determined. Finally, the development of the swim bladder is facilitated by the renewal...
Tipo: Text
Palavras-chave: Sparus auratus; Pisces; Marine fish; Environmental diseases; Fatty acids; Amino acids; Controlled conditions; Juveniles; Culture tanks; Growth; Light effects; Nutritional requirements; Fish larvae; Syndrome de paroi; Nutrition; Alimentation; Lumière; Inflation primaire de la vessie natatoire; Sparus auratus; Elevage larvaire intensif; Poisson.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/these-1679.pdf

Early weaning of marine fish larvae onto microdiets: Constraints and perspectives
Provedor de dados: 5
Autores: Person, L.
Weaning small sized marine fish larvae at first feeding directly onto compound pellets is still difficult, while good results can be obtained when used in combination with live prey or when a prefeeding period on live prey is provided up to a size of about 2-3 mg. Microdiets are generally well ingested as their acceptability and visual detection may be improved using feeding activators and increasing good perception contrast. In theory, food may be processed to have a correct nutritional balance, selection of high digestible components is very important as larval digestive system is not fully functional during the first 2 or 3 weeks of life.
Tipo: Text
Palavras-chave: Hatching; Fatty acids; Amino acids; Nutritional requirements; Feeding behaviour; Stomach; Digestive system; Enzymes; Digestion; Physiology; Diets; Pellet feeds; Feeding; Fish larvae.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1422.pdf

Selection of finfish species (seabass) as candidates for aquaculture in French Polynesia
Provedor de dados: 5
Autores: Fuchs, Jacques; Gasset, Eric; Nedelec, Georges.
Species with a very high potential for aquaculture, allowing development projects on a short terms basis: the seabass originating from S.E. Asia. Species, potentially interesting but presenting some drawbacks, as difficulties to perform larval rearing or presenting pathological problem. Species considered as difficult to rear and not retained like Siganus argenteus , Siganidae or Caranx ignobilis , Carangidae. The future development of finfish in Polynesia is emphasized and a project of sea bass netcage culture in Polynesian lagoon is presented.
Tipo: Text
Palavras-chave: Siganus argenteus; Oreochromis; Coryphaenidae; Epinephelus microdon; Serranidae; Lates calcarifer; Centropomidae; Pisces; Fry; Fish larvae; Lagoons; Cage culture; Pellet feeds; Sexual reproduction; Spawning; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1474.pdf

Exposure to chronic moderate hypoxia impacts physiological and developmental traits of European sea bass (Dicentrarchus labrax) larvae
Provedor de dados: 5
Autores: Vanderplancke, Gwenaelle; Claireaux, Guy; Quazuguel, Patrick; Huelvan, Christine; Corporeau, Charlotte; Mazurais, David; Zambonino-infante, Jose-luis.
Since European sea bass (Dicentrarchus labrax) larvae occurred in coastal and estuarine waters at early life stages, they are likely to be exposed to reduced dissolved oxygen waters at a sensitive developmental stage. However, the effects of hypoxia at larval stage, which depend in part on fish species, remain very poorly documented in European sea bass. In the present study, the impacts of an experimental exposure to a chronic moderate hypoxia (40 % air saturation) between 30 and 38 days post-hatching on the physiological and developmental traits of European sea bass larvae were assessed. This study was based on the investigation of survival and growth rates, parameters related to energy metabolism [Citrate Synthase (CS) and Cytochrome-c Oxidase (COX)...
Tipo: Text
Palavras-chave: Hypoxia; Fish larvae; Energy metabolism; Maturation.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00253/36433/35005.pdf

Potentiel probiotique de levures productrices des polyamines dans le développement du système digestif du bar Dicentrarchus labrax et de la cabrilla arenera Paralabrax maculatofasciatus
Provedor de dados: 5
Autores: Tovar, Dariel.
The interest in probiotics for aquaculture is increasing rapidly. In the present work we evaluated the potential of some yeast to induce the larvae gut maturation in sea bass larvae Dicentrarchus labrax. The production of polyamines putrescine, spermidine and spermine was quantified in ten yeast strains using high performance liquid chromatography (HPLC). Afterwards, fluorescently labelled yeast adhesion to the intestine of sea bass larvae and the spotted sand bass (Paralabrax maculatofasciatus) was evaluated by fluorescent microscopy. Two of them, CBS 8339 strain (Debaryomyces hansenii) and X2180 strain (Saccharomyces cerevisiae) produce the polyamines of our interest. The same strains showed the best adhering capabilities to the sea bass and spotted sand...
Tipo: Text
Palavras-chave: Ontogeny; Digestive enzymes; Fish larvae; Polyamines; Probiotics; Ontogénèse; Enzymes digestives; Larves de poisson; Polyamines; Probiotiques.
Ano: 2002
URL: http://archimer.ifremer.fr/doc/2002/these-103.pdf

Ichthyoplankton of arvoredo biological marine reserve, Santa Catarina, Brazil
Provedor de dados: 83
Autores: Rutkowski,Thais; Schwingel,Paulo Ricardo; Brilha,Renan Todesco; Rodrigues-Ribeiro,Marcelo.
Arvoredo Island, located in Santa Catarina state - south Brazil, and its surrounding area were defined as a Conservation Unit (CU) in the category of Biological Reserve since 1990. This research aimed to analyze the inter-annual and seasonal (winter and summer) variations of ichthyoplankton densities at Arvoredo Biology Marine Reserve (ABMR), and their relationship with environmental variables in 1997/1998 (Campaign 1), 2007/2008 (Campaign 2) and 2008/2009 (Campaign 3). Fish eggs and larvae were sampled using a WP-2 net with 200 µm mesh size. The study area was influenced by three water masses, (i) Coastal Water throughout the whole year, (ii) Subtropical Shelf Water during the winter, and (iii) South Atlantic Central Water mainly in summer. A total of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Conservation Unit; Fish eggs; Fish larvae.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400017

Characterization of the early development of Pseudoplatystoma reticulatum Eigenmann &amp;amp; Eigenmann, 1889 (Siluriformes: Pimelodidae) from the Paraguay River Basin
Provedor de dados: 83
Autores: Andrade,Fernanda F.; Lima,Ariane F.; Assumpção,Lucileine; Makrakis,Sergio; Kasai,Rodrigo I. D.; Makrakis,Maristela C.
ABSTRACT This study described the initial development of Pseudoplatystoma reticulatum, as well as changes in growth patterns. Morphometric and meristic variables were analyzed during embryonic, larval and juvenile periods, even as allometric growth coefficients for larvae and juveniles. Eggs showed an average diameter of 1.79 mm and broad perivitelline space (23.41%). The total length (TL) of the larvae ranged from 3.05 to 25.72 mm, and the total number of myomeres ranged from 45 to 50 (preanal = 13-16 and postanal = 30-35). Initial pigmentation is poor, concentrated at the extremities of the yolk sac. In the flexion stage, the pigmentation intensifies and forms a longitudinal stripe extending from the snout to the operculum and two longitudinal stripes on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometric growth; Early life stages; Fish larvae; Morphology; Ontogeny.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200216

Early development and allometric growth in Nannacara anomala Regan, 1905 (Perciformes: Cichlidae) under laboratory conditions
Provedor de dados: 83
Autores: Kupren,Krzysztof; Prusińska,Maja; Żarski,Daniel; Krejszeff,Sławomir; Kucharczyk,Dariusz.
Morphological development and allometric growth of laboratory reared Nannacara anomala were studied from hatching to the loss of larval characters and beginning of squamation (18 days post-hatching) at 26°C. The mean total length (TL) of larvae and juveniles increased from 3.74 mm at hatching to 9.60 mm at metamorphosis. Morphogenesis and differentiation were most intense during the first week of development. During this period (TL interval = 3.74 - 4.84 mm) there was an evident priority to enhance the feeding and swimming capabilities by promoting accelerated growth in the head and tail regions. Following this period, there was a major decrease in growth coefficients, indicating a change in growth priorities. Observations on the early development of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ontogeny; Fish larvae; Morphological characteristics; Larval development; Substrate-brooder.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000300659

Ichthyoplankton composition, distribution and abundance on the southern patagonian shelf and adjacent waters.
Provedor de dados: 20
Autores: Ehrlich, M.D.; Sánchez, R.P.; de Ciechomski, J.D.; Machinandiarena, L.; Pájaro, M.
This paper reviews the information on pelagic and demersal fish eggs and larvae, describing the distribution and seasonality of different species and their arrangement in icthyoplankton assemblages in the Southern patagonian waters. It also reports on 11 surveys conducted by INIDEP during 1992-1995. A total of 488 ichthyoplankton samples were analyzed. Fish eggs have been recognized in 47.  of all ichthyoplankton samples. They belong to three species: Coelorhynchus fasciatus, Macrourus whitsoni and Micromesistius australis. Fish larvae of 23 species and 17 families have been identified in 96.  of all samples analyzed. Spawning of most species begins in autumn, and progresses through winter, when the southern blue whiting and grenadier fish contribute to...
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Fish larvae; Fish eggs; Seasonal distribution; Abundance; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999
URL: http://hdl.handle.net/1834/2574

Estudio de la condición nutricional de larvas de la población bonaerense de anchoíta (Engraulis anchoita) en relación con las características hidrográficas del área de crianza
Provedor de dados: 20
Autores: Díaz, M.V.; Pájaro, M.
The study of larvae nutritional condition allows to assess the physiologic state that reflects the environmental situation they were exposed to. It represents a useful instrument to determine favourable nursery areas, provides tools for the management of a population subject to fishing and furnishes information to establish appropriate closed areas and periods. The material analyzed derived from three cruises carried out to assess Argentine anchovy Northern stock during the 2003, 2004 and 2006 reproductive peak (SW Atlantic Ocean, Argentine Sea). The objective of this work was to study the nutritional status of Argentine anchovy first feeding larvae caught in the coastal and mid-shelf of the Río de la Plata River maritime front in relation to the...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Nursery grounds; Spawning populations; Morphometry; Length-weight relationships; Abundance.
Ano: 2013
URL: http://hdl.handle.net/1834/5496

Exploitation et optimisation de la production des cystes du crustacé "Artemia tunisiana" (bowen et sterling, 1978) dans la saline de Sfax
Provedor de dados: 20
Autores: Aloui, N.; Amorri, M.
La saline de Sfax constitue le meilleur site pour l’exploitation et la production d’Artemia en Tunisie. La production de cystes est exploitée chaque année pour être utilisée dans l’alimentation des larves de poissons. Cette production est estimée à 30 kg de cystes poids sec. Toutefois, lors de nos campagnes de récolte, nous avons enregistré de grandes pertes de cystes occasionnées par les vents emportant les cystes qui seront mélangés avec le sable.    Afin de minimiser les pertes et optimiser la production naturelle de la saline, nous avons jugé utile, d’installer des barrages dans les coins des bassins à Artemia pour s’opposer à l’action du vent. Par ailleurs, nous avons fait un suivi mensuel de l’abondance des cystes récoltés et de quelques paramètres...
Tipo: Journal Contribution
Palavras-chave: Barriers; Brine shrimp culture; Dissolved oxygen; Environmental conditions; Exploitation; Feeding; Fish larvae; Food organisms; Salinity effects; Spatial variations; Temporal variations; Cysts; Artemia culture; Prawns and shrimps; Crustaceans; Artemia.
Ano: 2009
URL: http://hdl.handle.net/1834/4747

Larvas de peces clupeiformes y microzooplankton en la estación fija "La Libertad" desde noviembre de 1999 a julio del 2000
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.
Uno de los principales objetivos es la evaluación de los impactos que los eventos de El Niño tienen en las poblaciones del ictioplancton, con especial referencia a huevos y larvas de especies de interés comercial. Para el efecto se utilizan también, a más de los datos oceanográficos, especies de foraminíferos planctónicos como indicadores del estado del ecosistema. En el presente documento se detalla la distribución de larvas de Sardinops sagax (sardina), Ophistonema sp., Cetengraulis mysticetus (chuhueco), Anchoa y Engraulis ringens (anchoveta) durante el primer semestre del año 2000.
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Biological production; Biomass; Zooplankton; Distribution; Fish eggs; Fish larvae; El Nino phenomena; Environmental impact; Fixed stations; Biological production; Biomass; Zooplankton; Distribution; Environmental impact; Fish larvae.
Ano: 2004
URL: http://hdl.handle.net/1834/2284

Condiciones del plancton en una estación fija: Puerto El Morro-Playas, Golfo de Guayaquil, 2000-2002
Provedor de dados: 20
Autores: Bonilla Coello, M.A.; Plúas, F.; Camposano, J.
En este estudio se examina la abundancia estructura poblacional y variación temporal del plancton, especialmente de copépodos en el Golfo de Guayaquil, a través de tres años de estudio, en condición no El Niño.
Tipo: Journal Contribution
Palavras-chave: Plankton; Phytoplankton; Abundance; Distribution; Zooplankton; Marine crustaceans; Fixed stations; Population structure; Diatoms; Fish eggs; Fish larvae; Population structure; Plankton; Phytoplankton; Distribution; Zooplankton; Diatoms; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_6115; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2002
URL: http://hdl.handle.net/1834/2315

Consideraciones sobre la alimentación de la caballa con especial enfasis en la depredación de huevos y larvas de peces
Provedor de dados: 20
Autores: Pájaro, M.
Adult and juvenile fish inter and intraspecific predation may be an important source on these first development stages. In this work, adult and juvenile mackerel samples from two areas of Buenos Aires province, one south of Cape San Antonio and the other near Mar del Plata city were analyzed. An important anchovy postlarvae ingestion in both regions considered was observed. A high number of mackerel eggs in the stomach contents from adults was identified. This evidence of cannibalistic behaviour in the argentine mackerel is the first of its kind made in this species and allows to suggest that embryo mortality due to cannibalism might constitute and important percentage of the total embryonic mortality.
Tipo: Journal Contribution
Palavras-chave: Feeding; Cannibalism; Fish larvae; Fish eggs; Feeding; Cannibalism; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_9580; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1993
URL: http://hdl.handle.net/1834/2569

Desarrollo larval de merluza (Merluccius hubbsi) considerando aspectos ecomorfologicos
Provedor de dados: 20
Autores: Betti, P.
The ontogeny of the first stages of development of hake (Merluccius hubbsi)considering yolksac larvae, preflexion larvae, larvae in flexion, postflexion larvae, transformation larvae and posttransition juveniles, is described. Fish larvae and posttransition juveniles were collected in the north Patagonian area, between 42° and 46°S, from surroundings of the coast to the 100 m isobath (Argentine Sea, SW Atlantic). The larvae were collected between December and February, and the posttransition juveniles, in April and June since 1989 to 2004. The morphometrics variables and pigmentation were recorded in 127 larvae y 41 posttransition juveniles ranging in total length (TL)from 2.0 to 35.0 mm. Additionally, the openning of the mouth was calculated and...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Juveniles; Ontogeny; Morphogenesis; Morphogenesis; Fish larvae; Juveniles; Ontogeny; Http://aims.fao.org/aos/agrovoc/c_4943; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_12941.
Ano: 2005
URL: http://hdl.handle.net/1834/2599

Composición, abundancia y distribución del ictioplancton alrededor de las Islas Malvinas, desde 1996 hasta 2003
Provedor de dados: 20
Autores: Schenone, N. F.; Navarro, C.
Se presenta la composicion, abundancia y distribucion del ictioplancton obtenido en la campana del BIP Dr. Eduardo L. Holmberg EH-04 04 03 realizada en octubre de 2003  Instituto Nacional de Investigacion y Desarrollo Pesquero INIDEP, Argentina). Se efectua una comparacion con datos obtenidos en otras campanas realizadas en la zona alrededor de las Islas Malvinas  Argentina, Atlantico SO , en primavera desde 1996 hasta 2003. Se describe la variacion de la extension de las areas de puestas y cria en los distintos anos. Se han identificado huevos de peces en el 42 por ciento de las muestras que pertenecen a Coelorynchus fasciatus, Micromesistius australis, Salilota australis y Sprattus fueguensis y larvas en el 75 porciento de las muestras, pertenecientes a...
Tipo: Theses and Dissertations
Palavras-chave: Abundance; Eggs; Fish larvae; Geographical distribution; Ichthyoplankton surveys; Identification keys.
Ano: 2004
URL: http://hdl.handle.net/1834/5783

Estudio sobre el crecimiento en peso y factor de condición en larvas de anchoíta, Engraulis anchoita Hubbs &amp; Marini. Variaciones regionales, estacionales y anuales
Provedor de dados: 20
Autores: de Ciechomski, J.D.; Sánchez, R.P.; Alespeiti, G.; Regidor, H.
The equation log W=a+bL (where W=dry weight in ug, and L=total length in mm)was used to describe the growth in weight of larval anchovy collected in two areas of the Argentine sea, sampled in different months and several years. Regression lines were compared by covariance analysis applied to two size groups, namely larvae less and over 10 mm total length, as an evident break in the slopes indicated the existence of a chenge of rythm in the trajectory of larval growth in length. Significant differences between the slopes of the growth lines were observed within the smaller size group. No regional or yearly differences could be established fo larvae larger than 10 mm.
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Fish larvae; Condition factor; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1986
URL: http://hdl.handle.net/1834/2023

Manuel d’identification des œufs et des larves des espèces les plus abondantes de poissons habitant au large des côtes de l’Afrique du Nord-Est.
Provedor de dados: 20
Autores: Sedletskaya, V.A.
Dans le cadre de leur coopération scientifique et technique, l’AtlantiNIRO et l’IMROP ont convenu de faire des publications conjointes des résultats de leurs travaux communs de recherche et de permettre la publication des travaux de leurs dans les revues des institutions. C’est dans ce cadre que le présent travail, réalisé par un chercheur de l’AtlantNIRO, est publié dans la série « Documents Techniques » de l’IMROP.
Tipo: Report
Palavras-chave: Fish larvae.
Ano: 1999
URL: http://hdl.handle.net/1834/227

Análisis de la distribución y abundancia del ictioplancton y zooplancton acompañante en el Golfo San Matías en noviembre de 1992
Provedor de dados: 20
Autores: Mercado, L.; Pose, M.; Tesolin, G.; Villar, C.
Realizado en el INIDEP (Instituto Nacional de Investigación y Desarrrollo Pesquero- Mar del Plata, Argentina)
Tipo: Theses and Dissertations
Palavras-chave: Ichthyoplankton; Zooplankton; Fish larvae; Abundance; Environmental conditions; Zooplankton; Fish larvae; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1993
URL: http://hdl.handle.net/1834/3550

Variación temporal de la abundancia de huevos y larvas de Engraulis anchoita en el litoral norpatagónico entre enero y abril de 2001. Crecimiento y mortalidad larval
Provedor de dados: 20
Autores: Brown, D.R.; Leonarduzzi, E.; Averbuj, A.; Livore, J.P.
Argentine anchovy (Engraulis anchoita) eggs and larvae abundance distribution patterns in the Argentine northpatagonian littoral during January-April 2001 were analyzed. As the season progressed, a process of decline in the reproductive activity was observed. Larval growth and mortality rates were established. Age determinations were performed analyzing otoliths daily increments. The 0.43 mm day-1 growth rate average did not show space-time differences, fact attributed to the homogeneity of the thermal field. The 0.32 d-1 January natural mortality rate was determined by exponential decline. Mortality rates, estimated with the mortality-aggregation model, were considered dependent on the larval size. The value ranges (d-1) were 0.07-0.49, 0.05-0.61 and...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Growth; Otoliths; Mortality.
Ano: 2013
URL: http://hdl.handle.net/1834/5500

Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico.
Provedor de dados: 20
Autores: Bellizia, L.L.; Pan, J.; Venerus, L.A.
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_14490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2000
URL: http://hdl.handle.net/1834/1477

Detección de un área de cría de la merluza de cola (Macruronus magellanicus)en el Mar Argentino.
Provedor de dados: 20
Autores: Machinandiarena, L.; Ehrlich, M.D.
This is the first report of a longtail hake (Macruronus magellanicus)nursery ground. The results of more than ten research cruises conducted since 1990 in the southern patagonian shelf are presented in this study. The nursery ground (52°S to 55°30'S)was detected by the presence of larvae between 5.60 to 12.80 mm of standard length in November and December in that area, with depth ranging from 90 to 160 m.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Nursery grounds; Ichthyoplankton surveys; Fish larvae; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 1999
URL: http://hdl.handle.net/1834/1877

Morphological development of the mouth and improvement in feeding ability in the early larval stages of red porgy, Pagrus pagrus (L.)
Provedor de dados: 20
Autores: Aristizabal, E.O.
The appearance, ossification and growth of cartilaginous structures of the mouth in early larval stages of laboratory reared red porgy Pagrus pagrus, were examined. At the time of mouth opening, red porgy larvae are equipped with the fundamental components of the oral cavity to allow the sucking motion for acquiring food. During the initial feeding stage, from day 5 after hatching (AH) to day 7 AH, the hyoid and lower branchial archs were completed, and the head length and other structural elements, like the ceratohyal-epihyal cartilage, increased rapidly. These events intensified sucking mechanisms by increasing the amount of ingested rotifers. After day 13 AH, the presence of the bony premaxilla and angular, the ossification of the Meckels cartilage and...
Tipo: Journal Contribution
Palavras-chave: Marine aquaculture; Fish culture; Fish larvae; Osteology; Fish culture; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005
URL: http://hdl.handle.net/1834/1560

Growth in the 0-group of Argentine hake (Merluccius hubbsi) from the Argentine-Uruguayan Common Fishing Zone
Provedor de dados: 20
Autores: Santos, B.A.; Renzi, M.A.
Growth of hake (Merluccius hubbsi) in the 0-group from the Argentine-Uruguayan Common Fishing Zone was studied and spawning data were back-calculated by identifying daily growth rings in otoliths of specimens caught during research cruises performed in May 1997, May 1998 and June 1999. Total length (TL) range was 14-69 mm. Increments were read under microscope using an otolith daily ring measurement system (RATOC). Changes in the increment width data present a pattern that seemed to be similar, and independent from birth date of individuals. Data observed and back-calculated showed good accordance with the Laird-Gompertz model. Significant differences between coefficients were found in all comparisons of growth curves for observed and retrocalculated data....
Tipo: Journal Contribution
Palavras-chave: Growth curves; Fish larvae; Juveniles; Otolith reading; Fish larvae; Juveniles; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2006
URL: http://hdl.handle.net/1834/2515

Estrategia reproductiva de la saraca, Brazilian menhaden, Brevoortia aurea (Pisces: Clupeidae), en el estuario del Río de la Plata
Provedor de dados: 20
Autores: Acha, E.M.
The Brazilian menhaden, Brevoortia aurea, is the only species of genus Brevoortia in South American Atlantic waters, being abundant in the Rio de la Plata estuary.  The temporal and spatial reproductive pattern of this menhaden was analyzed in relation to the major hydrographic features of the region, and the reproductive biology was studied by using histological analysis of ovaries. B.aurea is a multiple spawner with indeterminate annual fecundity. Daily spawning activity was mostly in the afternoon (15:00 - 16:00),based on the incidence of females with both hydrated oocytes and postovulatory follicles. Spawning frequency, determined using the percentage of females with postovulatory follicles, was about 12.  during November.  At this frequency, each...
Tipo: Theses and Dissertations
Palavras-chave: Reproduction; Fecundity; Ovaries; Fish larvae; Eggs; Life history; Brackishwater fish; Spawning grounds; Spawning seasons; Estuaries; Estuaries; Ovaries; Eggs; Life history; Spawning grounds; Reproduction; Fecundity; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_12170; Http://aims.fao.org/aos/agrovoc/c_7277; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999
URL: http://hdl.handle.net/1834/1458

Composición y distribución de huevos y larvas de peces frente a la costa ecuatoriana. Septiembre 2007
Provedor de dados: 20
Autores: Elías, E; Calderón, G.; Luzuriaga, G.; Chavarría, J.
Entre el 04 y 13 de septiembre de 2007, se realizó el crucero T07-09-04HL, para determinar la composición de huevos y larvas de peces en la zona marine costera de la costa ecuatoriana. El área de estudio se subdividió en cuatro subáreas, dentro de las cuales se ubicaron 157 estaciones donde se realizaron arrastres verticales utilizando una red CalVET. Se registro un total de 15 940 huevos de peces.m-2, correspondientes a 11 órdenes, 19 familias, 18 géneros, 18 especies y además huevos en su primer estadio embrionario. También se identificaron 23 140 larvas.m-2, que correspondieron a 12 órdenes, 32 familias, 45 géneros, 45 especies, y organismos en estado de prelarva. La distribución de las áreas de abundancia de huevos y larvas de peces determine zonas de...
Tipo: Journal Contribution
Palavras-chave: Fish eggs; Fish larvae; Species composition; Spatial distribution; Ichthyoplankton.
Ano: 2010
URL: http://hdl.handle.net/1834/4835

Abundancia y distribución del ictioplancton, fito y zooplancton en el mar ecuatoriano en abril de 1995
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.; Elías, E.; Flores, M.E.
El presente trabajo trata de la distribución de la abundancia de huevos y larvas de peces en relación con la abundancia del zooplancton y fitoplancton colectado en 13 estaciones muestreadas a bordo del B/I TOHALLI durante el crucero pelágico-oceanográfico realizado en abril de 1995. Se analizó un total de 12820 huevos de peces. (10m²)¹ y 5145 larvas de peces (10m²)¹. La mayor abundancia de huevos y larvas de peces se localizó al este de las Islas Galápagos, en las estaciones 1P y 10, situadas en los extremos norte y sur del área de muestreo a la altura de la Isla San Cristóbal, con 5226 huevos (10m²)¹ y 1042 larvas (10m²)¹, respectivamente, mientras que la menor abundancia se localizó también al este de la Islas Galápagos, en las estaciones 7 y 5 con 109...
Tipo: Journal Contribution
Palavras-chave: Abundance; Ichthyoplankton; Phytoplankton; Zooplankton; Cruises; Fish eggs; Fish larvae; Phytoplankton; Zooplankton; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1998
URL: http://hdl.handle.net/1834/2278

Monitoreo de las condiciones bio-oceanográficas entre la I y IV Regiones, año 2005. Informe Final corregido. 2da. Versión
Provedor de dados: 20
Autores: Braun, M.; Valenzuela, V.; Reyes, H.; Castillo, J.; Pizarro, M.; Catasti, V.; Saavedra, J.; Letelier, J.
En el presente informe se entregan los resultados de las condiciones oceanográficas fisico-químicas, la distribución geográfica, abundancia y variabilidad estacional e interanual de huevos y larvas de anchoveta, sardina, jurel y caballa y la distribución espacial e índices de densidad y cobertura geográfica de los recursos detectados por medio de técnicas hidroacústicas entre la I y IV Regiones, obtenidos durante los cruceros estacionales realizados en invierno y primavera de 2005 y verano de 2006.
Tipo: Report
Palavras-chave: Echo surveys; Geographical distribution; Abundance; Seasonal variations; Fish eggs; Fish larvae; Physical oceanography; Chemical oceanography; Geographical distribution; Physical oceanography; Fish larvae; Chemical oceanography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_5830; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_1516.
Ano: 2007
URL: http://hdl.handle.net/1834/1850

Diagnóstico del plancton en el estuario de San Lorenzo en agosto 2006 (Esmeraldas-Ecuador)
Provedor de dados: 20
Autores: Torres, G.; Andrade, C.
Se realizó un monitoreo del plancton en el estuario de San Lorenzo en junio 2006. En los resultados se registró 128 especies del fitoplancton (método cuantitativo) y 50 especies (cualitativo). Las diatomeas más representativas fueron S. costatum, T. nitzschioides, P. longissima, L. danicus, Navicula sp., P. sulcata: T. nitzschioides. Thalassiosira sp. y flagelados (cuantitativo); S. costatum, Coscinodiscus sp., N. sigma y P.  Sulcata (cualitativo). La presencia de Gymnodinium sp. P. maximun y M. rubrum podría asociarse con la formación de mareas rojas al interior del estuario. En los resultados del zooplancton registrarón 16 taxas constituidos mayoritariamente por Zoeas de Brachiura y Copépodos, distribudidos en toda el área de estudio principalmente en...
Tipo: Journal Contribution
Palavras-chave: Plankton; Diatoms; Phytoplankton; Zooplankton; Biomass; Fish larvae; Eggs; Abundance; Estuaries; Species diversity; Zooplankton; Biomass; Eggs; Estuaries; Plankton; Phytoplankton; Fish larvae; Species diversity; Diatoms; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2007
URL: http://hdl.handle.net/1834/2378

Estudio de huevos y larvas de peces en el mar ecuatoriano durante septiembre-diciembre de 1990
Provedor de dados: 20
Autores: Villamar, F.; Ortega, D.
Durante los cruceros oceanográficos realizados en septiembre, noviembre y diciembre de 1990, las especies de peces de interés comercial encontrados fueron: Sardinops sagax, Etrumeus teres, Opisthonema s.p, Scomber japonicus y Engraulis ringens; en concentraciones no mayores a 100 ejemplares/10 m2, localizados en la zona Sur del perfil costanero ecuatoriano. Entre otros huevos (H) y larvas (L) de peces, se encontraron los pertenecientes al género Leuroglossum, de la familia Bathylagidae y también ejemplares pertenecientes a la familia Myctophydae. En general, la cantidad máxima total de huevos de peces fue mayor de 10000 H/10 m2 en la longitud 82°00'W, tanto a la altura de Cabo Pasado como al sur de la Punta de Santa Elena. La cantidad máxima de larvas de...
Tipo: Journal Contribution
Palavras-chave: Larval development; Fish larvae; Commercial species; Fish eggs; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1991
URL: http://hdl.handle.net/1834/3140

Abundancia y distribucion de huevos y larvas de la merluza argentina (Merluccius hubbsi Marini, 1933) en un area de desove intensivo en el litoral norpatagonico.
Provedor de dados: 20
Autores: Bellizia, L.L.; Pan, J.; Venerus, L.A.
Argentine hake Merluccius hubbsi represents nowadays the main fishery resource of the Argentine Sea, in spite of the fact that the percentage of captures related to total fishery production has fallen down 30% in the last decade. The abundance and distribution of hake eggs and larvae in an intense spawning area in front of Isla Escondida (Chubut province), are analyzed. This phenomena was studied from a comparative-historical point of view allowing to apppreciate the evolution of a resource at present undergoing an overfishing pressure, capable of pushing it to collapse. Since 1973 maximum egg densities diminished and, if total egg production is considered a reliable index for recruitment prediction, no signs of overcoming stocks can be seen. On the other...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Fish eggs; Abundance; Spawning; Spawning; Fish larvae.
Ano: 2000
URL: http://hdl.handle.net/1834/1477

Consumo de oxígeno, crecimiento y utilización del alimento durante el desarrollo larval del besugo Pagrus pagrus (Linné, 1758)(Pisces:Sparidae).
Provedor de dados: 20
Autores: Aristizabal, E.O.
Knowledge of the life history of fish larvae is of practical importance to understand variations in the survival rate not only for cultivated fish but also for fishery biology studies. With the aim of recognizing critical changes during the first days of life of red porgy larvae, the oxygen consumption, growth, and food utilization were studied. After hatching, the larvae were transferred to two 400 L fiberglass tanks with microalgae (Nannochloropsis oculata)and enriched rotifers (Brachionus plicatilis)as initial food. During the incubation and larval rearing, water temperature was kept at 18.0 ± 0.5ºC and salinity ranged from 33.0 to 34.0 psu. Results indicate a decrease in larval growth between day 3 and 4 after hatching, when larvae opened their mouths,...
Tipo: Journal Contribution
Palavras-chave: Fish culture; Marine fish; Fish larvae; Metabolism; Oxygen consumption; Fish culture; Metabolism; Fish larvae; Oxygen consumption; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_4769; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5478.
Ano: 2006
URL: http://hdl.handle.net/1834/1557

Oceanographic and faunistic structures across an Angola Current intrusion into northern Namibia waters.
Provedor de dados: 20
Autores: John, H.C.H.; Mohrholz, V.; Lutjeharms, J.R.E.
It is thought that the penetration of Angolan waters through the Angola–Benguela Frontal Zone (ABFZ) into the much cooler Benguela regime may come about by a poleward slope undercurrent as well as by cross-frontal filaments. To test this hypothesis, two zonal transects off the northern Namibian coast were surveyed by CTD casts, current measurements and ichthyoplankton samples during April 1999. Simultaneous sea-surface temperature (SST), chlorophyll-a concentration, and wind data were obtained from satellite. The multidisciplinary results are described.An intense intrusion of the Angola Current into northern Namibian waters occurred with distinct signals of high temperatures and salinities, low chlorophyll-a concentration, and Angolan fish larvae of both...
Tipo: Journal Contribution
Palavras-chave: Oceanographic data; Fauna; Frontal features; Chlorophylls; Temperature; Mesoscale features; Larvae; Surveys; Fish larvae; Hydrography.
Ano: 2004
URL: http://hdl.handle.net/1834/4937

Patrones de utilización de la laguna Mar Chiquita (Buenos Aires, Argentina) y área costera adyacente por parte de los primeros estadios ontogénicos de peces
Provedor de dados: 20
Autores: Bruno, Daniel O.
The role of the Mar Chiquita lagoon and its adjacent coastal area as nursery ground for fish larvae and juveniles and the factors which regulate their recruitment process, was evaluated. To do so, we analyzed the fish early life stages composition and spatio-temporal variation over the marine-estuarine gradient of the lagoon and its relationship with environmental factors; the diel variation of these stages in the immediate area at the mouth of the lagoon; and the source of the organic carbon which feed them on the mouth of the lagoon and adjacent coastal area, by using stable isotope analysis. The richness and mean density of larvae were higher at the offshore area than at the lagoon. Inside the lagoon the dominant species in larval stage was Brevoortia...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater fish; Fish larvae; Juveniles; Recruitment; Life cycle; Environmental factors; Abundance; Brackishwater environment; Coastal lagoons; Brevoortia aurea; Gobiosoma parri; Platanichthys platana; Ramnogaster arcuata; Odontesthes argentinensis; Engraulidae; Brackishwater environment.
Ano: 2014
URL: http://hdl.handle.net/1834/5819

A drift study of vertical distribution and mortality of Engraulis anchoita eggs and larvae.
Provedor de dados: 20
Autores: Sánchez, R.P.; de Ciechomski, J.D.; Lasta, C.A.; Guerrero, R.A.
Lagrangian changes in distribution and survival within an anchovy egg and larvae patch were studied by means of multiple opening/closing sampling following a free drifting buoy. The buoy was equipped with a radar reflector and flashing light, and it was connected to a current cross drogue floating at 15 m depth, which corresponded to the main egg and larvae concentration within the patch. The drifter was launched on the Buenos Aires continental shelf, off Necochea during the spring spawning peak of 1983. Three discrete depths (within, below and above the thermocline)were repeatedly sampled close to the drogue with a Motoda sampler. Egg and larval abundances in the vicinity of the drogue were monitored at 3/4 hour intervals for a period of three days. Each...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Fish eggs; Vertical migrations; Feeding; Environmental effects; Ichthyoplankton surveys; Vertical distribution; Survival; Abundance; Drifting data buoys; Fishery surveys; Feeding; Fish larvae; Survival; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 1999
URL: http://hdl.handle.net/1834/1871

Les larves de poissons téléostéens le long des côtes Est tunisiennes : distribution et abondance
Provedor de dados: 20
Autores: Kochedi, W.; Hattour, A.; Said, K.
Une campagne de prospection planctonique à été réalisée entre le 24 juin et le 7 juillet 2008 au large des côtes Est de la Tunisie depuis le Cap bon jusqu’à Ras Kapoudia. Les objectifs de cette campagne consistaient à étudier l’assemblage larvaire des poissons téléostéens et d’évaluer l’influence des facteurs environnementaux sur leur distribution spatiale. Au total 10832 larves ont été identifiées appartenant à 46 taxons. La distribution spatiale des larves a montré une grande variabilité interspécifique. En effet, plusieurs facteurs sont intervenus dans leur distribution. Nous citons en premier lieu la circulation complexe des masses d’eaux, qui est responsable de la répartition des larves bien éloignées des aires de ponte. Le gradient de la profondeur...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Environmental factors; Spatial distribution.
Ano: 2011
URL: http://hdl.handle.net/1834/4692

Los primeros estadios de vida de la merluza Merluccius hubbsi Marini, 1933 en el Mar Argentino como aporte al conocimiento de su reclutamiento y estructura poblacional.
Provedor de dados: 20
Autores: Ehrlich, M.D.
The early life history of hake Merluccius hubbsi Marini, 1933 in the Argentine Sea for understanding its recruitment and population structure.Hake is the most important demersal species in the Argentine Sea. Its catch in1996 exceeded 600.000 t and it seemed overfished.The study of the hake early life history was developed in two aspects,reproductive analysis like fecundity and spawning frequency, and early stages(eggs, early larvae, late larvae and juveniles) distribution and abundance.Hake is an indeterminate batch spawner, wich spawns all over the year, with two peak spawning times, one during winter (May-July) in the northern area of its wide distribution (35°-38°S) and the other in summer (October-March) in the north Patagonia coastal waters...
Tipo: Theses and Dissertations
Palavras-chave: Fish eggs; Fish larvae; Juveniles; Recruitment; Fecundity; Spawning seasons; Fish larvae; Juveniles; Fecundity; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_15725.
Ano: 1998
URL: http://hdl.handle.net/1834/1468

Efficiency of co-feeding red porgy (Pagrus pagrus L.)larvae with live and compound diet
Provedor de dados: 20
Autores: Aristizabal, E.O.; Suárez, J.
The red porgy (Pagrus pagrus)is an important commercial and recreational species with very good prospect for aquaculture. Because significant mortalities, the mass production of this species is limited. This paper describes three weaning strategies to investigate their effects on the survival and growth of red porgy larvae reared in laboratory: A)traditional three-step weaning (rotifers - Artemia - diet)(control); B)one-step early weaning by co-feeding (rotifers - Artemia + diet), and C)one-step direct early weaning (rotifers - diet). Sigificative differences were recorded among treatments (P0.05). Best survival rate (45.6 ± 7.6 percent)and growth (7.4 ± 0.5 mm)were found in treatment B. Results indicate that co-feeding red porgy larvae with inert and live...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Marine fish; Feeding; Feeding; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2006
URL: http://hdl.handle.net/1834/1556

Etude comparative de la valeur nutritive du nauplius d'Artemia dans l'élevage larvaire du loup (Dicentrarchus labrax)
Provedor de dados: 20
Autores: Aloui, N.; El Abed, A.
The tests of larval nutrition applied to larvae of sea bass (Dicentrarchus labrax), using the tunisian Artemia and the imported Artemia (EG stump) showed that the tunisian stump is good quality, and gives a good growth and a good rate of survival on tested larvae. The tunisian stump could be used efficiently to feed fish larvae.
Tipo: Journal Contribution
Palavras-chave: Sea bass culture; Fish larvae; Artemia culture.
Ano: 2002
URL: http://hdl.handle.net/1834/248

Microestructura de los otolitos Sagittae de larvas y juveniles de Merluccius hubbsi (Marini 1933): análisis comparativo entre las áreas de distribución bonaerense y norpatagónica
Provedor de dados: 20
Autores: Buratti, C.C.
The life history of numerous aquatic organisms involves a pelagic larval stage, followed by a shift to a demersal or benthic existence (settlement) in the juvenile and adult stage. This transition and ecological, physiological and morphological changes frequently remain recorded like checks or marks in fish otoliths. As a contribution to the knowledge of hake (Merluccius hubbsi)life history, sagittae otoliths of larvae and juveniles with total length between 19 and 190 mm inhabiting North Patagonian and Bonaerensis waters in the Argentine sea (SW Atlantic)were analyzed. Using an image analysis system, otoliths microstructure was described and comparisons between left and right otoliths and between study areas in the following variables were realized:...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Juveniles; Otolith reading; Otoliths; Larval settlement; Life history; Otoliths; Life history; Fish larvae; Juveniles.
Ano: 2003
URL: http://hdl.handle.net/1834/3108

Determinación de diferentes conjuntos de merluza común (Merluccius hubbsi) en el Mar Argentino mediante el estudio histológico de ovarios
Provedor de dados: 20
Autores: Cornejo, A.M.
Tipo: Theses and Dissertations
Palavras-chave: Ovaries; Histology; Ecosystems; Fish eggs; Fish larvae.
Ano: 1985
URL: http://hdl.handle.net/1834/4188

Bioenergética del besugo Pagrus pagrus.
Provedor de dados: 20
Autores: Aristizabal, E.O.
The utilization of the energy of food by red porgy (Pagrus pagrus Linnaeus, 1758) from the Argentine Sea (SW Atlantic) was studied. From the energetic point of view, it is proposed that the strategy of patitioning, utilization and storage of the energy of food, is an indicator of the organism response to the environmental conditions. The main objective was to know the proportion of the energy of food derived to the different components of the bioenergetics budget. In order to estimate the monthly energy investment in reproductive growth, chemical analysis of gonads from fishes caught by the fishery fleet and from laboratory studies were performed. Two indexes were used to calculate the energy investment in female ovaries: the proportion of net daily energy...
Tipo: Theses and Dissertations
Palavras-chave: Fish culture; Bioenergetics; Eggs; Fish larvae; Food consumption; Energy budget; Metabolism; Oxygen consumption; Fish culture; Eggs; Food consumption; Metabolism; Fish larvae; Oxygen consumption; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_2502; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_4769; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5478.
Ano: 2003
URL: http://hdl.handle.net/1834/1466

Patrones de distribución espacio-temporal de los estadíos embrionarios y larvales de la anchoíta (Engraulis anchoita Hubbs &amp; Marini) a micro y macro-escala. Su relación con la supervivencia
Provedor de dados: 20
Autores: Sánchez, R.P.
This dissertation is focused on the study of implications of spatial patterns on survival of eggs and larvae and subsequent recruitment of the SW Atlantic anchovy, Engraulis anchoita. The study of distribution patterns is encompassed within the conceptual framework of the analysis of reproductive strategies of marine bony fish, as adaptations that enable them to cope with and actively exploit environmental variability, regulating their abundance and avoiding extinction. The SW Atlantic anchovy, is ideally suitable for studies on reproductive biology and recruitment on a comparative basis. Its spawning and nursery grounds are located in very diverse ecosystems. This variety refers to their physico-chemical properties, carrying capacity, the influence of...
Tipo: Theses and Dissertations
Palavras-chave: Fish eggs; Fish larvae; Recruitment; Ichthyoplankton; Biomass; Reproduction; Developmental stages; Mortality; Stock assessment; Environmental conditions; Biomass; Developmental stages; Stock assessment; Fish larvae; Reproduction; Mortality; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2230; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_4945; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 1995
URL: http://hdl.handle.net/1834/1491

Historia de vida temprana de la corvina rubia (Micropogonias furnieri, Sciaenidae) en el Estuario del Río de La Plata
Provedor de dados: 20
Autores: Braverman, M.
This study encompasses the bio-physical interactions of whitemouth croaker (Micropogonias furnieri) early life stages living in La Plata estuary (Argentina-Uruguay, South America) to understand how they take advantage of the estuarine dynamics while traveling from spawning to nursery areas and undergoing ontogenetic and associated ecological changes. The analyses used include studies of spatio-temporal distribution length-dependent patterns; growth patterns looking for settlement marks in otoliths; and development related to metamorphosis and ontogenetic variations of the diet and trophic level. Samples and data come from vertically stratified samplings from 3 cruises (2005, 2006 and 2009). Distributional data also comes from an historic database. Results...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Developmental stages; Metamorphosis; Larval settlement; Ontogeny; Saline fronts; Estuarine dynamics.
Ano: 2011
URL: http://hdl.handle.net/1834/4187

Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento
Provedor de dados: 20
Autores: Díaz, M.V.
Nutritional condition studies allow the assessment of physiological state of each larva and thus, the establishment of favourable nursery areas which provide better survival and growth. In the present work, morphometrical, histological and biochemical techniques were employed to assess nutritional condition of anchovy, Engraulis anchoita, larvae captured in the Argentine Sea. Its results were complemented with oceanographic data and information about zooplankton abundances, both prey and predators of anchovy larvae. Anchovy larvae abundance and distribution would be mainly determined by physico-chemical variables. Even though no significant differences were found in larval nutritional condition among the studied areas, larval condition was slightly better...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Nutritional requirements; Morphometry; Histology; Hydrography; Nursery grounds; Fish larvae; Nutritional requirements; Hydrography; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2010
URL: http://hdl.handle.net/1834/3548

Distribución y abundancia de huevos y larvas de langostino patagónico (Pleoticus muelleri) (Penaeoidea, Solenoceridae) en las temporadas estivales de 2008 y 2009
Provedor de dados: 20
Autores: Moriondo Danovaro, P.
The study on distribution and abundance of eggs and early planktonic stages of red shrimp, Pleoticus muelleri (Bate, 1888), contributes to a better knowledge of the species dynamics. Results from processing and analyzing 72 plankton samples collected with Bongo net during two research cruises on board of FV “Arbumasa XVIII” and RV “Capitán Oca Balda”, carried out in the Patagonian littoral in March 2008 and January 2009, are presented. In both cruises, eggs and larval stages were found all over the study area. The highest punctual densities of eggs were recorded in the area known as “La Pared” (46° 45’ S-65° 55’ W and 46° 50’ S-65° 55’ W). Eggs indicate the presence of shrimp reproductive concentrations which, while migrating eastwards towards waters of...
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Eggs; Abundance; Fishery surveys; Pleoticus muelleri; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4880

Estudio sobre la anatomía y algunos aspectos de la biología de los congrios que habitan el Mar Argentino y adyacencias.
Provedor de dados: 20
Autores: Figueroa, D.E.
On the base of samples of congrid eels captured in the South Western Atlantic Ocean, between 34 degree S to 40 degree S and 30m to 400m depth, from research cruises, commercial fleet (low scale and coastal fishing) and specimens preserved in ichthyological collections, four species were determined: Ariosoma opistophthalmum, Conger orbignyanus, Bassanago albescens and Bassanago nielseni. The latter is the first record in the region. Diagnosis of taxa from Family Congridae to species is given. Morphology, reproduction, feeding and distribution of the fish species found from the region are compared and discussed, as well as those from other parts of the world. On the other hand, numerous samples of ichthyoplankton were obtained from research cruises carried...
Tipo: Theses and Dissertations
Palavras-chave: Animal morphology; Taxonomy; Anatomy; Reproduction; Feeding; Geographical distribution; Fish larvae; Taxonomy; Feeding; Geographical distribution; Animal morphology; Anatomy; Reproduction; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_421; Http://aims.fao.org/aos/agrovoc/c_49890; Http://aims.fao.org/aos/agrovoc/c_6507; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1999
URL: http://hdl.handle.net/1834/1486

Variabilite mensuelle du zooplancton et de l'ichtyoplancton dans le golfe de Tunis
Provedor de dados: 20
Autores: Missaoui, H.; El Abed, A.; M'rabet, R.; Romdhane, M.S.; Zarrad, R.; Jarboui, O.
Monthly variability of zooplankton and ichthyoplankton abundance and composition were studied in 6 stations in the Gulf of Tunis between February 2003 and January 2004. Plankton trawls were horizontal, in surface and at night. Study area seems to be influenced by climatic conditions and the outflow of Majreda River that affect the surface temperature and salinity. Copepods, with many abundance peaks in the year, formed the most abundant group (84%) followed by cladocerans (8%) and chaetognaths (3%). The appendicularians, cladocerans and medusae had swarms in the summer, the creseis and the chaetognths in the autun and the zoae larvae in the spring. The highest fish spawning periods was in summer then the highest larva abundance was in winter and...
Tipo: Journal Contribution
Palavras-chave: Community composition; Fish larvae; Ichthyoplankton; Temporal variations; Zooplankton; Zooplankton; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2004
URL: http://hdl.handle.net/1834/4242

Variación interanual del mesozooplancton en la plataforma bonaerense en primavera: introducción de nuevas metodologías para su análisis
Provedor de dados: 20
Autores: Di Mauro, R.
The distribution and abundance of mesozooplankton (specially copepod, cladoceran and appendicularian species) of the Buenos Aires shelf obtained in spring, during the years 2002, 2003 and 2004, were analysed. A small bongo net provided with 67 and 220 µm meshes, was employed in order to obtain a complete representation of the size spectrum of the mesozooplankton. The analysis included both the traditional optical method and the a new automatic image analysis (ZooImage). The results were related with the oceanographic conditions, which were, in general similar to the mean conditions for the study area. The finer mesh (67 µm) allowed a more accurate estimation of the abundance and biomass of small copepod species ( 1mm total length), producing the tick mesh...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Biomass; Annual variations; Fish larvae; Imaging techniques; Oceanographic data; Environmental conditions; Salinity; Temperature; Water masses.
Ano: 2011
URL: http://hdl.handle.net/1834/4204

El canibalismo como mecanismo regulador denso-dependiente de mortalidad natural en la anchoíta argentina Engraulis anchoita. Su relación con las estrategias reproductivas de la especie.
Provedor de dados: 20
Autores: Pájaro, M.
Cannibalism is not an abnormal behaviour and it can be observed in a wide number of animals. In Pisces, cannibalism may be the result of endogenous intraspecific factors (nutritional state, size, age, state of development) or exogenous intraspecific factors (food, density, light). Nevertheless, external fertilization and the high fecundity of teleost fish tend to increase egg cannibalism, in particular among filter feeding fishes such as anchovies. In the present work, two important Argentine anchovy Engraulis anchoita stocks were studied. The first is to the north of 41°S, and spawns during spring on the coastal and shelf waters of Buenos Aires Province,Argentina, and Uruguay. The second one inhabits the Patagonian region, from 41°S to 47°S. It spawns...
Tipo: Theses and Dissertations
Palavras-chave: Feeding behaviour; Cannibalism; Natural mortality; Fish larvae; Fish eggs; Spawning seasons; Stocks; Food preferences; Reproduction; Stocks; Food preferences; Feeding behaviour; Cannibalism; Fish larvae; Reproduction; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_3024; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_9580; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1998
URL: http://hdl.handle.net/1834/1476

Efecto de la predación de Noctiluca scintillans Macartney, Sagitta friderici Ritter-Záhony y larvas de Engraulis anchoita Hubbs-Marini sobre la comunidad planctónica costera bonaerense
Provedor de dados: 20
Autores: Sato, N.E.
Studied the effect of the predation of Noctiluca scintillans, Sagitta friderici and larvae of Engraulis anchoita in planktonic community of the coastal waters off Buenos Aires province from samples obtained of a permanent station EPEA (38°28’ S, 57°41’ W, 48 m depth) from March 2000 through April 2001. The composition of the diet of the three species predators considering appearances quantitative and qualitative was determined. It found that N. scintillans consumed mainly diatoms and copepod eggs. The alimentary index varied between 27.50% and 77.00%. The highest value corresponded to September, 2000. The analyses of the diets of S. friderici and of the larvae of E. anchoita indicated that both consume mainly different stages of development of the same...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Fish larvae; Feeding behaviour; Predation; Seasonal variations; Food organisms; Predator prey interactions; Engraulis anchoita; Noctiluca scintillans; Sagitta friderici; Marine environment.
Ano: 2008
URL: http://hdl.handle.net/1834/4778

Observaciones sobre embriones de larvas y juveniles de la pescadilla (Cynoscion striatus)
Provedor de dados: 20
Autores: de Ciechomski, J.D.; Cassia, M.C.
Observations on the embrionic and larval development of Cynoscion striatus are presented. The description are made on the basis of material obtained by artificial fertilization. Eggs are pelagic, spherical, 700-840µ in diameter and with single oil globule of 210µ-240µ. The yolk is homogeneous and the chorion has smooth surface. The embryonic development is short and at temperatures of 19°-20°C hatching takes place, 34-36 hours after the fertilization. The larvae at hatching are small, about 2 mm in length and not advanced in their development. The mouth is not functional and the anus is not open. The oil globule is situated in the posterior part of the yolk sac; the position of the anus is close to the posterior end of the yolk sac and the digestice tract...
Tipo: Journal Contribution
Palavras-chave: Embryos; Fish larvae; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1982
URL: http://hdl.handle.net/1834/2045

¿Existen variaciones interanuales en el crecimiento larval de anchoíta bonaerense (Engraulis anchoita)?
Provedor de dados: 20
Autores: Barretto, A.C.; Chandler, D.E.; Gómez, M.I.
Se determinaron las tasas de crecimiento de larvas de la anchoíta argentina (Engraulis anchoíta) provenientes de la plataforma bonaerense, contando y midiendo incrementos diarios en sus otolitos sagitta. Las larvas se capturaron en diferentes años y durante diferentes épocas (otoño de 1999; invierno de 2000 y primavera de 2002, 2003 y 2004)a los fines de analizar diferencias interanuales en el crecimiento. Se observó que tanto el crecimiento de las larvas como el del otolito estaban acoplados. Las tasas de crecimiento se calcularon en forma individual (para cada larva) o a partir de modelos largo-edad. Dichos valores no resultaron significativamente distintos entre las primaveras y promediaron 0.44 mm/día. Tampoco hubo diferencias entre las temperaturas...
Tipo: Theses and Dissertations
Palavras-chave: Age; Growth; Hydrography; Annual variations; Fish larvae; Growth; Age; Hydrography; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005
URL: http://hdl.handle.net/1834/2605

Distribución de huevos, larvas y prerreclutas de merluza (Merluccius hubbsi) en la Zona Común de Pesca Argentino-Uruguaya. Período 1999-2001
Provedor de dados: 20
Autores: Machinandiarena, L.; Brown, D.R.; Ehrlich, M.D.; Pájaro, M.; Dorado, J.; Teso, V.
Distribution and abundance of eggs, larvae and prerecruit stages of Merluccius hubbsi were evaluated to examine spawning, nursery and settlement areas in the Argentine-Uruguayan Common Fishing Zone during the 1999-2001 period. Larvae and prerecruit stages were more abundant at stations from 50 m to 100 m depth. The nursery area would extend from the 50 m isobath south of 37° S to the 200 m isobath northward where the shelf becomes narrower. In the whole sampling area small size prerecruits were caught; therefore, the whole zone should be considered as a potential settlement area.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Fish eggs; Larval settlement; Nursery grounds; Spawning grounds; Abundance; Fish larvae; Nursery grounds; Spawning grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25438; Http://aims.fao.org/aos/agrovoc/c_7277.
Ano: 2006
URL: http://hdl.handle.net/1834/2512

Análisis de la distribución y abundancia del ictioplancton en el Golfo San Matías en setiembre de 1993
Provedor de dados: 20
Autores: Rodríguez Gil, S.G.; Serafini, R.; Bordino, P.
Tipo: Theses and Dissertations
Palavras-chave: Ichthyoplankton surveys; Fish larvae; Fish eggs; Abundance; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 1994
URL: http://hdl.handle.net/1834/3875

Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997
Provedor de dados: 20
Autores: Luzuriaga de Cruz, M.; Ortega, D.; Elías, E.
El presente trabajo se refiere a las variaciones observadas en el ictioplancton presente en la estación fija "La Libertad" desde febrero de 1997 hasta diciembre del mismo año. Los datos se relacionan con las observaciones ecológicas hechas en base a indicadores de masas de agua, formaníferos planctónicos, presentes en las mismas muestras.
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Fixed stations; Fish larvae; Fish eggs; Foraminifera; Community composition; Species diversity; Fish larvae; Species diversity; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1998
URL: http://hdl.handle.net/1834/2289

Validation of daily increment deposition in otoliths of the pejerrey (Odontesthes bonariensis) larvae
Provedor de dados: 20
Autores: Brown, D.R.; Fuentes, C.M.
The daily basis of increment deposition in sagitta otoliths of laboratory and mesocosm reared (Odontesthes bonariensis) larvae was validated (Buenos Aires prov., Argentina). The timing of changes in rearing environment was recorded in otoliths by tetracycline marking. Results showed that increment deposition started at hatching and proceeded on a daily basis at least during the first two months of life. Thus, age and hatching date of O. bonariensis larvae can be easily determined by otolith reading within this period. This information will be useful to assess growth rate and mortality in extensive culture as well as in stock enhancement programs with this species.
Tipo: Journal Contribution
Palavras-chave: Freshwater aquaculture; Fish larvae; Controlled conditions; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005
URL: http://hdl.handle.net/1834/1558

Identificación de larvas y juveniles de Patagonotothen ramsayi y Patagonotothen tessellata (Pisces, Nototheniidae)
Provedor de dados: 20
Autores: Poliglieddu, M.L.; Saccullo, H.
Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Juveniles; Meristic counts; Morphometry; Fish larvae; Juveniles; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 1997
URL: http://hdl.handle.net/1834/3127

Estudios sobre las variaciones espacio-temporales en los patrones de distribución de embriones y larvas de la anchoíta (Engraulis anchoita), en relación con la estimación de su intensidad reproductiva
Provedor de dados: 20
Autores: Sánchez, R.P.
Ichthyoplankton samples were collected during an exploratory cruise carried out by the RV Dr.Holmberg during the spring spawning peak of 1981 in the sea-shelf off Buenos Aires province (Argentina). The cruise was designed to carry out population studies in a restricted area of intense reproduction activity, in order to gather information on the time-space patterns of distribution of the eggs and larvae of the species.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Mortality; Growth curves; Controlled conditions; Fish eggs; Fish larvae; Mortality; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1986
URL: http://hdl.handle.net/1834/2031

Inventario de larvas de especies registradas para el Caribe colombiano.
Provedor de dados: 20
Autores: Medellín Mora, Johanna; Polanco F., Andrea; Navas, Gabriel R.
Se presenta el listado taxonómico de los estadios larvales de especies de peces registrados para el Caribe colombiano producto de una extensa revisión bibliográfica de los trabajos realizados en el tema. Se encontraron registros de 85 familias incluidas en 21 órdenes, con un total de 129 especies. A nivel de composición, el orden Perciformes presentó el mayor número de familias (41), géneros (66) y especies (46). Las familias Carangidae y Exocoetidae presentaron la mayor riqueza. En términos de distribución, se evidenció una mayor concentración de esfuerzos de muestreo en los departamentos de La Guajira, Magdalena y San Andrés y Providencia.
Tipo: Journal Contribution
Palavras-chave: Fish larvae; Check lists; Ichthyoplankton; Fish larvae.
Ano: 2013
URL: http://hdl.handle.net/1834/5881

Variación de la población del ictioplancton en el Pacífico Sur Oriental durante diciembre de 1997
Provedor de dados: 20
Autores: Ortega, D.
Uno de los principales objetivos de esta investigación es contribuir al estudio del ictioplancton y zooplancton durante el evento El Niño 1997 en el Pacífico Sur Oriental y a la vez relacionar la abundancia, migración y distribución de los diferentes grupos de organismos con los parámetros de temperatura y salinidad, con respecto a la variación de la población del ictioplancton
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Zooplankton; El Nino phenomena; Geographical distribution; Environmental factors; Population dynamics; Fish eggs; Fish larvae; Geographical distribution; Zooplankton; Environmental factors; Population dynamics; Fish larvae.
Ano: 1998
URL: http://hdl.handle.net/1834/2291

Variaciones estacionales en el crecimiento de larvas de anchoita (Engraulis anchoita).
Provedor de dados: 20
Autores: Leonarduzzi, E.
Age and growth rates of southern anchovy larvae (Engraulis anchoita)were estimated by analysis of daily increments in sagittal otoliths under light microscopy. Samples were collected during 2002 with a bongo net, in the Buenos Aires province, Argentine Sea (SW Atlantic). Otoliths corresponding to 251 larvae (size range 3.5 u 12.2 mm SL)were analyzed. Growth rate estimated as slopes by linear regression of length-age data were 0.50, 0.40, and 0.42 mm/day, and these values corresponded to larvae collected in spring, summer and autumn. Larval growth were significantly distinct between the year seasons (ANCOVA, p&lt;0.01). Recent larval growth expressed as mean growth rates during the last 4 days of the larvae was not correlated with surface temperature. The...
Tipo: Theses and Dissertations
Palavras-chave: Fish larvae; Growth; Otoliths; Seasonal variations; Daily variation; Growth; Otoliths; Fish larvae.
Ano: 2002
URL: http://hdl.handle.net/1834/1484

Preliminary results on the nutritional evaluation of omega-3-HUFA-enriched &lt;i&gt;Artemia&lt;/i&gt; nauplii for larvae of the sea bass, &lt;i&gt;Dicentrarchus labrax&lt;/i&gt;
Provedor de dados: 27
Autores: Van Ballaer, E.; Amat, F.; Hontoria, F.; Léger, P.; Sorgeloos, P.
Freshly hatched San Pablo Bay and Great Salt Lake &lt;i&gt;Artemia&lt;/i&gt; nauplii (omega-3-HUFA-poor) and enriched meta-nauplii (omega-3-HUFA-enriched)were compared to reference &lt;i&gt;Artemia&lt;/i&gt; nauplii (omega-3-HUFA-rich) as a food source for the larvae of the sea bass, &lt;i&gt;Dicentrarchus labrax&lt;/i&gt;. Significant differences in survival and biomass production between the treatments could be attributed to the omega-3-HUFA content of the food. A delayed mortality in fish larvae fed the Great Salt Lake &lt;i&gt;Artemia&lt;/i&gt; is suspected to be caused by a high level of alpha-BHC in this &lt;i&gt;Artemia&lt;/i&gt; source. Growth was not significantly different between the treatments, most probably due to the large variation in growth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial feeding; Fish culture; Fish larvae; Nutritive value; Artemia salina; Dicentrarchus labrax [Bass].
Ano: 1985
URL: http://www.vliz.be/imisdocs/publications/261899.pdf

Development of a lipid-enrichment technique for &lt;i&gt;Artemia&lt;/i&gt; juveniles produced in an intensive system for use in marine larviculture
Provedor de dados: 27
Autores: Dhont, J.; Lavens, P.; Sorgeloos, P.
Although there exists an obvious inclination to replace live larval food by formulated feeds, &lt;i&gt;Artemia nauplii&lt;/i&gt; are still essential in the larviculture of marine fish species. So far, on-grown &lt;i&gt;Artemia&lt;/i&gt; are rarely used in larviculture although they offer several advantages over &lt;i&gt;Artemia nauplii&lt;/i&gt;: e.g. they contain a higher individual protein and energy content thus improving the fish larvae's energy budget; an equal amount of live food is reached with far less individuals thus a considerable saving of &lt;i&gt;Artemia&lt;/i&gt; cysts; their composition of (n-3) highly unsaturated fatty acids (HUFA) may easily be improved by applying enrichment techniques. This study deals with the development of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish culture; Fish larvae; Food organisms; Intensive culture; Lipids; Nutritive value; Artemia.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2854

Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (&lt;i&gt;Epinephelus tauvina&lt;/i&gt; F.): preliminary results
Provedor de dados: 27
Autores: Dhert, P.; Lim, L.C.; Lavens, P.; Chao, T.M.; Chou, R.; Sorgeloos, P.
In spite of its aquaculture potential, the larval rearing of greasy grouper (&lt;i&gt;Epinephelus tauvina&lt;/i&gt;) remains problematic and is not yet commercially feasible. The low and unpredictable larval survival is due to difficulties encountered in spawning the broodstock, the small size of the larvae at first feeding, and the high sensitivity of the larvae until day 45. The nutritional requirements for the broodstock as well as for the young larvae are still enigmatical. In this presentation the impact of supplementing the highly unsaturated fatty acids (HUFA), eicosapentaenoic (EPA), and docosahexaenoic acid (DHA) to the broodstock and larval diets is illustrated.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diets; Fatty acids; Fish culture; Fish eggs; Fish larvae; Nutritional requirements; Survival.
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2852

Rearing techniques for difficult marine fish larvae
Provedor de dados: 27
Autores: Dhert, Ph.; Divanach, P.; Kentouri, M.; Sorgeloos, P.
In finfish mariculture, seed production and larval rearing still form the bottleneck for all ongrowing operations and are considered as the main limiting factor for industrial development. Through trial and error more than through biological understanding two opposite hatchery techniques have been developed which surprisingly control a multiparametric combination of different factors but aspire to the same objective of conformity with wild standards and the cost-effective production of larvae. In intensive aquaculture, the rearing technique is characterised by high initial larval densities in small tanks under strict hydraulic, thermic, and nutritional conditions. The light conditions are artificial. The temperature and quality of water are controlled. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Environmental conditions; Fish eggs; Fish larvae; Food organisms; Industrial production; Marine fish; Rearing; Seed (aquaculture); Artemia; Brachionus plicatilis; Pisces [Fish].
Ano: 1998
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=301

Three simple culture devices for aquatic invertebrates and fish larvae with continuous recirculation of the medium
Provedor de dados: 27
Autores: Sorgeloos, P.; Persoone, G.
The 3 culturing devices described are based on the principle of the classic air-water lift, which facilitates continuous recirculation and aeration of the cultivation medium. The first device is a "circulation cylinder", convenient for hatching eggs of the brine shrimp &lt;i&gt;Artemia salina&lt;/i&gt; and for culturing algae and protozoans. In the second device, an internal basket (i.e., a glass cylinder with plankton-gauze bottom) prevents the animals being carried along in the air-water lift. The third device, analogous to the second, is provided with a lateral waste-drain and a water collector with siphon, which empties regularly into the main culture vessel. The second and third devices proved to be excellent for the cultivation of a variety of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; Fish larvae; Instruments; Marine invertebrates.
Ano: 1972
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3461

Search for beneficial bacterial strains for turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt; L.) larviculture
Provedor de dados: 27
Autores: Huys, L.; Dhert, P.; Robles, R.; Ollevier, F.P.; Sorgeloos, P.; Swings, J.
The aerobic bacterial flora in the gut of turbot larvae and their influence on larval survival was examined. Two turbot experiments were run with six replicates each time. Large variation, from 0% up to 44%, was observed in the survival percentage of turbot larvae. There was no correlation between the number of bacteria present in the gut of turbot larvae and the larval survival rate. During both experiments, all replicates followed nearly the same rate of bacterial development in the gut of turbot larvae going from circa 10&lt;sup&gt;2&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; just before first feeding at day 3 post hatch to 10&lt;sup&gt;5&lt;/sup&gt; CFU larva&lt;sup&gt;-1&lt;/sup&gt; at day 9 post hatch.In total, 127 bacterial isolates from 12...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aerobic bacteria; Aquaculture; Commensals; Digestive system; Fish culture; Fish larvae; Gastrointestinal tract; Microorganisms; Rearing; Scophthalmus maximus; Survival; Bacteria; Scophthalmus maximus; Vibrio mediterranei.
Ano: 2001
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=5720

An oral challenge for turbot larvae with &lt;i&gt;Vibrio anguillarum&lt;/i&gt;
Provedor de dados: 27
Autores: Chair, M.; Dehasque, M.; Van Poucke, S.; Nelis, H.; Sorgeloos, P.; De Leenheer, A.P.
There is a need for a standard in vitro procedure to infect larval fish with bacteria. Such a procedure could be used as a tool to evaluate fish quality, verify fish sensitivity to a certain bacterial strain or evaluate the pathogenicity of a bacterium towards a given fish species. The availability of a challenge test is a prerequisite in studies dealing with the effect of different medicinal treatments on diseased fish. An oral challenge test would offer the possibility to investigate the routes of infection via the digestive tract, i.e. after feeding contaminated feeds. The present study aims to verify this hypothesis and proposes a standard challenge procedure for turbot (&lt;i&gt;Scophthalmus maximus&lt;/i&gt;) larvae with a pathogenic &lt;i&gt;Vibrio...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterial diseases; Digestive system; Disease control; Fish culture; Fish diseases; Fish larvae; Marine fish; Pathogenic bacteria; Vibrio anguillarum.
Ano: 1994
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2552

A new artificial diet for the early weaning of seabass (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) larvae
Provedor de dados: 27
Autores: Devresse, B.; Candreva, P.; Léger, P.; Sorgeloos, P.
The weaning of marine fish larvae is a critical step in larval rearing. The successful transition from live food to an artificial feed depends among others on the quality of the dry feed used (e.g. freshness of ingredients, digestibility, quality of the formulation) and the larvae themselves (e.g. age, behaviour towards artificial diets, development of the digestive tract, efficiency of certain metabolic pathways). The present study shows the results obtained with a new artificial diet formulated for the weaning phase of marine fish larvae (&lt;i&gt;Dicentrarchus labrax&lt;/i&gt;) in commercial hatcheries.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artificial feeding; Feed composition; Fish culture; Fish larvae; Hatcheries; Dicentrarchus labrax [Bass].
Ano: 1991
URL: http://www.vliz.be/imisdocs/publications/262322.pdf

The effect of supplemental ascorbic acid in enriched live food for &lt;i&gt;Clarias gariepinus&lt;/i&gt; larvae at startfeeding
Provedor de dados: 27
Autores: Merchie, G.; Lavens, P.; Verreth, J.; Ollevier, F.P.; Nelis, H.; De Leenheer, A.P.; Storch, V.; Sorgeloos, P.
The effect of three dietary ascorbic acid (AA) concentrations, each applied via two feed types, on production characteristics and physiological condition of African catfish (&lt;i&gt;Clarius gariepinus&lt;/i&gt;) larvae has been assessed in two 10-day culture trials. Three treatments received only &lt;i&gt;Artemia&lt;/i&gt; nauplii enriched with an experimental emulsion containing 0, 10 or 20% ascorbyl palmitate (AP) and yielding 530, 1200 and 1600 µg AA g&lt;sup&gt;-1&lt;/sup&gt; DW &lt;i&gt;Artemia&lt;/i&gt; , respectively; the other three treatments were fed the same &lt;i&gt;Artemia&lt;/i&gt; diets which were partially substituted by an artificial diet containing no vitamin C (ratio 20:80). No differences in survival could be observed: however, from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish larvae; Food organisms; Vitamin C; Clarias gariepinus.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2963

Cofeeding of phospholipids to turbot &lt;i&gt;Scophthalmus maximus&lt;/i&gt; L. larvae as a tool to reduce live food consumption
Provedor de dados: 27
Autores: Dhert, P.; González Félix, M.; Van Ryckeghem, K.; Geurden, I.; Thysen, F.; Lebegue, E.; Lavens, P.; Sorgeloos, P.
The possible benefits of feeding a formulated diet, together with &lt;i&gt;Artemia&lt;/i&gt; , to first-feeding turbot larvae were investigated. Five dietary regimes were used: control ( &lt;i&gt;Artemia&lt;/i&gt; only), cofeeding with a diet rich in phospholipid (PL) from bovine brain, cofeeding with a diet rich in free fatty acids (FFA) from the same source, cofeeding with a commercial diet (Lansy A2), and a formulated feed only (PL-rich diet). All treatments with artificial diets and the control treatment that received &lt;i&gt;Artemia&lt;/i&gt; exclusively gave a similar survival rate of the fish at day 29. Cofeeding with artificial diets resulted in a lower growth rate than the control treatment. Cofeeding the larvae with PL-rich or FFA-rich diets did...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture techniques; Feeding experiments; Fish culture; Fish larvae; Food organisms; Scophthalmus maximus; Artemia.
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4014

Live-food mediated drug delivery as a tool for disease treatment in larviculture: 2. A case study with European seabass
Provedor de dados: 27
Autores: Chair, M.; Romdhane, M.S.; Dehasque, M.; Nelis, H.; De Leenheer, A.P.; Sorgeloos, P.
The purpose of this study is to investigate the possibility of oral delivery of the antibiotics Trimethoprim (TMP) and Sulfamethoxazole (SMX) to marine fish larvae through incorporation of these antibiotics into the live food organism &lt;i&gt;Artemia&lt;/i&gt;. SMX and TMP were selected for their wide range action against gram negative pathogenic bacteria and because of their limited solubility in seawater. Ormetoprim-Sulfadimethoxine (brand name Romet-30) is a new combination of a similar antimicrobial drug used in aquaculture. Diseased penaeid larvae fed Romet-30 through the food chain exhibited greater survival than the untreated ones. In an earlier study Verpraet have described a technique for bioencapsulating high doses of more than 500 mu g TMP +...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibiotics; Aquaculture techniques; Disease control; Fish culture; Fish larvae; Food additives; Food organisms; Dicentrarchus labrax [Bass].
Ano: 1991
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2805

Review on the dietary effects of phospholipids in fish and crustacean larviculture
Provedor de dados: 27
Autores: Coutteau, P.; Geurden, I.; Camara, M.R.; Bergot, P.; Sorgeloos, P.
A beneficial effect of dietary phospholipid (PL) supplementation in purified diets in terms of survival, growth, resistance to stress tests, and occurrence of deformities has been demonstrated in larval and juvenile stages of various species of fish and crustaceans. The exact determination of PL requirements in larvae is complicated due to the difficulty to bio-encapsulate PL in live prey. Furthermore, the great variety in purity and composition of the PL sources, and the experimental conditions (such as diet formulation and extent of co/prefeeding with live food) makes it difficult to compare requirements determined with artificial diets. Larval stages are extremely sensitive to a dietary PL deficiency and require higher levels of dietary PL than...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Complex lipids; Crustacean culture; Crustacean larvae; Diets; Fish culture; Fish larvae.
Ano: 1997
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2927

Hybrids between Pseudoplatystoma corruscans and P. reticulatum (Siluriformes: Pimelodidae) previously reported in the Upper Paraná River are likely escapes from aquaculture farms: evidence from microsatellite markers
Provedor de dados: 103
Autores: Baggio,Rafael A.; Moretti,Caroline B.; Bialetzki,Andréa; Boeger,Walter A.
ABSTRACT The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix &amp; Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann &amp; Eigenmann, 1889) in captivity has generated many concerns about the possibility of introduction of farmed hybrids into natural environments. In the last decade, hybrids between these species, known as 'pintachara' or 'cachapinta', were reported from different regions of the Upper Paraná River basin. Prospection of these hybrids is important in order to orient conservation programs for the species involved. Knowledge of the presence of these hybrids will direct conservation strategies towards prevention and/or mitigation of the effects of cross breeding in natural populations of P....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservation genetics; Fish larvae; Interspecific hybrids; Introgression; Molecular markers.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000201303

Larval development of Plagioscion squamosissimus (Heckel) (Perciformes, Sciaenidae) of Itaipu reservoir (Paraná river, Brazil)
Provedor de dados: 104
Autores: Nakatani,Keshiyu; Baumgartner,Gilmar; Baumgartner,Maria do Socorro T.
The aim of the present study was to characterize the larval development of Plagioscion squamosissimus (Heckel, 1840) morphometrically, collected at Itaipu reservoir from March 1988 to April 1990. It was obtained the samples monthly, with a conic-cylindrical plankton net with 0.5mm mesh. The morphological description of the larvae of P. squamosissimus was based on different stages of development. The specimens less than 6mm long present a moderate sized head and those that are larger than this length, present a large head. The pectoral fins are in an elevated position, near the operculum bones, and the ventral fins are in thoracic positions, the body has a moderate height, the eyes are small to moderate and the mouth is large with caniniform teeth. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plagioscion squamosissimus; Fish larvae; Morphology; Larval development; Itaipu.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100003

Morphological description of larvae of the Mapará Hypophthalmus edentatus (Spix) (Osteichthyes, Hypophthalmidae) in the Itaipu reservoir (Parana River, Brazil)
Provedor de dados: 104
Autores: Nakatani,Keshiyu; Baumgartner,Gilmar; Latini,João Dirço.
The ontogenetic aspects of larvae of Hypophthalmus edentatus (Spix, 1829) from the ichthyoplankton samples collected in the Itaipu reservoir between March 1988 and April 1990 were analysed. Sample were caught by 0.5 mm mesh conic-cylindrical plankton net. Larvae of H. edentatus were identified and described as Siluriforms from the morphological and morphometric development series. They have a small to medium-sized head, long body, small eyes, little pigmentation, mandibular barbules and 53 to 56 myomeres. High values obtained with correlation coefficient (r &gt; 0.97; p &lt; 0.001) show that growth was proportional in different parts of the body.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypophthalmus edentatus; Fish larvae; Itaipu reservoir; Larval development; Paraná River.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300013

Some aspects of the ecology of fish larvae in the floodplain of the high Paraná river, Brazil
Provedor de dados: 104
Autores: Baumgartner,Gilmar; Nakatani,Keshiyu; Cavicchioli,Maristela; Baumgartner,Maria do Socorro Tenório.
The spatial and temporal distribution and nychthemeral variation of fish larvae in six stations (Ivinhema, Patos, Paraná, Cortado, Baía and Guaraná) in the floodplain of the high Paraná river are provided. The paper also provides the relationship of this distribution to some environmental factors. From March 1992 to February 1993 ichthyoplanktonic samples were collected by conic cylindrical nets, with 0.5mm of mesh size and fluxometer attached, in 10-minute hauls at the surface and bottom during nychthemeral cycles. At the same time water samples were taken to determine environmental factors. During the above period 5,672 larvae were collected: 57,6% from Cortado station and 13,2% from Ivinhema and Paraná stations. The greatest densities were recorded...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish larvae; Ecology; Distribution; Floodplain; Paraná river.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000300005

Feeding of the Brycon cephalus, Triportheus elongatus and Semaprochilodus insignis (osteichthyes, characiformes) larvae in Solimões/Amazonas River and floodplain areas.
Provedor de dados: 36
Autores: LEITE,Rosseval Galdino; ARAUJO-LIMA,Carlos A.R.M.
Information on larval fish feeding is essential for understanding their trophic relations, including the management in conditions totally or partially controlled by humans. An experiment was designed to evaluate the larval diets of three commercially important species. Four varzea-lakes and the adjacent river were sampled with bongo and hand nets from January 1993 to November 1995. Larval diets were evaluated by length-classes and capture sites, and were tested by two factor ANOVA. The larvae were feeding in all habitats, except in the flooded forests. The three species had different diets, which varied with their length and lake. The rotifers were the main initial food item of the three species, replaced by fish larvae in Brycon cephalus, cladocerans in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Brazil; Feeding; Fish larvae; Food size.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672002000300499

A Lipid-walled microcapsule diet as co-feed for early feeding the Osphronemus gourami (Lacepede) larvae
Provedor de dados: 2
Autores: Sukardi, Purnama; Hana, Hana; Prayogo, Norman Arie; sulistyo, Isdy; Soedibya, Petrus Hary Tjahja; Harisam, Taufan; Winanto, Tjahyo.
 The effects of microcapsule diet as co-feeding for early weaning phase of gourami larvae where evaluated in terms of ingestion rate of microcapsule, growth, and survival rate. The availability of tubifex worms as natural food is uncertain and can introduce pathogens to fish culture from outside environment. Therefore, the attempt to replace or substitute this natural food continues in order to reduce the level of dependence. This research used Complete Randomized Designed (CRD) with four treatments based on a different protocol feeding management. Gourami larvae should be started with the co-feeding on day 12 until day 17 and they are more receptive to microcapsule diets after day 17. The ingestion rate of microcapsule which consumed by the larvae during...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gourami; Feeding management; Microcapsule; Fish larvae; Growth; Survival rate.
Ano: 2018
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/38335

Impact of Brazilian fish species at early developmental stages on plankton communities and water chemical parameters
Provedor de dados: 3
Autores: Soares, Claudemir Martins; Hayashi, Carmino; Faria-Soares, Anna Christina Esper; Galdioli, Eliana Maria.
 Effect of larvae of Astyanax altiparanae (AA), Piaractus mesopotamicus (PM), Leporinus obtusidens (LO) and Prochilodus lineatus (PL) on plankton communities and water quality were evaluated. Twenty 500 L tanks were used into a completely randomized design with five treatments and four replications, containing 350 individuals of each species per tank. One treatment control had no larvae (CT). Every six days, were collected periphyton and water to determine the concentrations of chlorophyll and total phosphorus. Plankton samples (20 mm mesh net) were taken every three days. Fish affected plankton communities, which showed lower densities of total zooplankton in AA tanks than in LO tanks. Increased density of rotifers and reduced density of copepods were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.05.00.00-9 Astyanax altiparanae; Fish larvae; Plankton interaction; Leporinus obtusidens; Piaractus mesopotamicus; Prochilodus lineatus 2.05.03.00-8.
Ano: 2016
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/32063

Predation of Piaractus mesopotamicus and Oreochromis niloticus larvae by Pantala flavescens with different length classes - doi: 10.4025/actascibiolsci.v33i4.5470
Provedor de dados: 3
Autores: Lacerda, Carlos Henrique Figueiredo; Universidade Federal de Pernambuco; Hayashi, Carmino; Instituto de Pesca; Galdioli, Eliana Maria; Universidade de Maringá; Fernandes, Carlos Eduardo Bento; Universidade de Maringá.
The experiment had as objective to study the survival of Piaractus mesopotamicus and Oreochromis niloticus larvae subject to predation by Pantala flavescens larvae with different length classes. We used 120 larvae of P. mesopotamicus, 120 of O. niloticus, and also 24 larvae of Pantala flavescens, distributed in 24 aquariums with useful volume for 2 L, being placed one Odonate for aquarium. The treatments differed as regard to the prey species and the predator size, being kept a control treatment. An aquarium (2 L) containing one larvae of Odonate and 10 larvae of fish were considered an experimental unit. After the beginning, each three hours (18:00, 21:00, 0:00, 3:00, 6:00, 9:00, 12:00, 15:00 and 18:00h), the remnant larvae of fish (alive) in each...
Palavras-chave: Experiment; Odonate; Fish larvae; Predator and prey experiment; Odonate; Fish larvae; Predator and prey.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5470

Fontes de erros na mensuração do comprimento e peso de larvas de peixes - DOI: 10.4025/actascibiolsci.v30i3.393
Provedor de dados: 3
Autores: Pedreira, Marcelo Mattos; UFVJM; Santos, José Claudio Epaminondas dos; CODEVASF; Sampaio, Edson Vieira; CODEVASF; Silva, Janaina de Lima; UFVJM; Ferreira, Felipe Nilvan; UFVJM.
Trabalhos com larvas de peixes, sejam de cultivo ou ecológicos invariavelmente empregam o comprimento e o peso como parâmetros. Assim sendo, este experimento foi realizado com larvas de Lophiosilurus alexandri pacamã objetivando determinar algumas fontes de erros amostrais na medição do tamanho e do peso de larvas de peixes. Avaliou-se cinco possíveis fontes de erros. O primeiro foi o erro na medida dos comprimentos total e padrão, devido a acuidade de medição de dois observadores. O segundo, foi o erro na medida dos comprimentos total e padrão, devido ao encolhimento proporcionado pelo fixador formalina a 10%. O terceiro foi o erro devido a duas formas de secagem das larvas na obtenção da biomassa. O quarto experimento foi sobre a influência do tamanho e...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas amostragem; Exatidão; Larvas de peixes; Lophiosilurus alexandri; Medidas; Precisão sampling; Accuracy; Fish larvae; Measurements; Precision.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/393

First occurrence of Dolicholagus longirostris larvae (Maul 1948) (Osmeriformes, Bathylagidae) near the mouth of the Amazon River
Provedor de dados: 49
Autores: Campos,Paula Nepomuceno; Paiva,Rosildo Santos; Bonecker,Ana Cristina Teixeira; Melo,Nuno Filipe Alves Correia de; Palheta,Glauber David Almeida; Contente,Cristiane Teixeira; Ramos,Caio Aguiar Rodrigues.
The family Bathylagidae contains eight genera and 22 species, of which only five occur in the Southwest Atlantic. Until recently, only adult specimens of the bathylaginin Melanolagus bericoides had been recorded off southern Brazil, between the Santa Marta Cape and Rio Grande (31° S and 49° W). The present work reports the first occurrence of Dolicholagus longirostris larvae on the northern Brazilian coast, expanding its distribution in the Southwest Atlantic. The two specimens found were collected near the mouth of the Amazon River (02° 00' 19" N, 47° 03' 30" W, and 00° 49' 06" N, 46° 25' 09" W).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Longsnout blacksmelt; Bathylagidae; Fish larvae; Distribution; North Brazilian coast.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100026

Description and distribution of the larvae of two species of Fistulariidae (Teleostei, Syngnathiformes) in the southeastern Brazil
Provedor de dados: 49
Autores: Barros,Fernanda Bernardo Anacreto Gomes de; Castro,Márcia Salustiano de; Bonecker,Ana Cristina Teixeira.
Fistulariidae contains the single genus, Fistularia, with four species. Two of these species are recorded from Brazil: Fistularia petimba and F. tabacaria. This study describes larvae of these two species of Fistularia, recording their distribution along the southeastern Brazilian coast, which is limited in the north by Real River (12° S) and in the south by São Tomé Cape (22° S). Samples were collected using a bongo net with mesh apertures of 330 and 500 µm during three oceanographic cruises conducted on spring/98 (Central III), winter/99 (Bahia 1) and autumn/00 (Central IV). The net was towed obliquely and the maximum depth was 200 m. Larvae of F. petimba were the most abundant and most widely distributed within the study area, including the seamounts of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fistularia petimba; Fistularia tabacaria; Distribution; Fish larvae; Southeastern brazilian coast.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100014

Occurrence of Larvae and Juveniles of Eucinostomus argenteus, Eucinostomus gula, Menticirrhus americanus, Menticirrhus littoralis, Umbrina coroides and Micropogonias furnieri at Pontal do Sul beach, Paraná
Provedor de dados: 52
Autores: Godefroid,Rodrigo Santiago; Santos,César; Hofstaetter,Marion; Spach,Henry Louis.
Despite its importance, most ichthyoplankton studies in the South-Southeastern coast of Brazil, have been accomplished on the continental shelf. Regarding the beach environment, recognized as a nursery, little is known about the ichthyoplankton. We analyzed 288 samples collected with a 18 by 2 m seine net, 1 mm mesh and a conical plankton net, with a mesh of 300 mum and a 60 cm mouth. Eucinostomus argenteus comprised 78 % of the larvae and juveniles caught in the samples. The occurrence of gerreids was strongly concentrated in the summer, while the Menticirrhus littoralis, Menticirrhus americanus and Umbrina coroides were present during all seasons. M.littoralis was most abundant during spring, while M. americanus and U. coroides dominated during winter....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish larvae; Surf Zone; Brazil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400012

Seasonal variation in fish larvae at the entrance of Guanabara Bay, Brazil
Provedor de dados: 52
Autores: Castro,Marcia S. de; Bonecker,Ana Cristina Teixeira; Valentin,Jean L.
Studies were carried out to find out qualitative and quantitative temporal variations in fish larvae to relate seasonal, diurnal and tidal cycles to the density of larvae. Sampling was performed at one station, during two three-day periods in September 1995 and March 1996. Samples were collected during ebb and flood tides,in oblique hauls using a bongo net of 500 µm mesh size. A total of 42 taxa were identified. The families Engraulidae (Cetengraulis edentulus, Anchoa lyolepis) and Clupeidae (Harengula jaguana) had high mean densities and dominated both periods. Higher larval mean densities occurred in March, a period of relatively high temperatures and low salinities. The diurnal pattern of larval abundance consisted of high densities at night and low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish larvae; Seasonal variation; Tidal cycle; Diurnal variation; Coastal bay; Guanabara Bay.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000100016

Tolerance to the air exposition test of Hoplias lacerdae larvae and juvenile during its initial development
Provedor de dados: 52
Autores: Luz,Ronald Kennedy; Portella,Maria Célia.
The establishment of evaluation parameters for larvae and juvenile quality assessment is highly desirable. The experiment evaluated the Stress Resistance Rate (Re) on Hoplias lacerdae larvae and juveniles. Larvae on the 13th, 16th, 19th, 23rd and 26th days of life were subjected to Re evaluation tests. Twenty animals were stoked in one liter beaker and kept at 27 to 28.5°C. The following treatments were applied: E3 -3 minutes; E5 - 5 minutes; E7 - 7 minutes; E10 - 10 minutes and E15 -15 minutes on drying paper. After 24 hours Re was evaluated. It was observed that Re values showed an increase from 13th to 19th day in all treatments indicating an increasing resistance related to larval development. High Re rates were observed during the whole experiment,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hoplias lacerdae; Fish larvae; Stress resistance.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000500009