Consulta: subjectFacets:"Juveniles"
Registros recuperados: 77
Data/hora: 07/06/2024 02:36:37

Diferencias estacionales en la dieta de individuos juveniles del Pingüino Patagónico (Spheniscus magellanicus) reveladas en base al análisis de isótopos estables en uñas
Provedor de dados: 68
Autores: Silva,Laura A; Siles,Laura; Cardona,Luis; Tavares,Mauricio; Crespo,Enrique; Gandini,Patricia.
Se realizó un análisis de isótopos estables en uñas para evaluar la composición de la dieta y el uso estacional de los recursos tróficos en individuos juveniles de Pingüino Patagónico (Spheniscus magellanicus) provenientes de las costas de Brasil. El análisis se llevó a cabo sobre las porciones basal y distal de las uñas, correspondientes a la temporada invernal y a la reproductiva, respectivamente, en función del tiempo de integración de la señal isotópica determinado por la tasa de crecimiento de la uña y la fecha de colecta. Se observaron diferencias significativas en las señales isotópicas de las dietas correspondientes a las temporadas reproductiva e invernal, sugiriendo diferencias en las contribuciones relativas de las presas. Durante la temporada...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dieta invernal; Isótopos; Juveniles; SIAR; SIBER; Spheniscus magellanicus; Uñas.
Ano: 2015
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0073-34072015000200001

Primeros estadios del ciclo de vida de peces nativos del Río San Pedro (Cuenca del Rio Valdivia, Chile)
Provedor de dados: 72
Autores: Montoya,Germán; Jara,Alfonso; Solis-Lufí,Katherin; Colin,Nicole; Habit,Evelyn.
Los estadios de huevos, larvas y juveniles de los peces de agua dulce nativos de Chile son prácticamente desconocidos. Conocer su estacionalidad, morfología y uso de hábitat es relevante para comprender su biología y permitir la conservación de esta ictiofauna altamente amenazada. Asimismo, los primeros estadíos del ciclo de vida de los peces determinan la persistencia de las poblaciones en el tiempo. Dado esto, el objetivo del presente trabajo fue dar a conocer y describir los resultados de intensivos muestreos (465 días) destinados a encontrar los primeros estadíos de las 14 especies nativas que habitan el río San Pedro (cuenca del Valdivia). Los muestreos se efectuaron desde octubre de 2005 a marzo de 2008. Se encontraron huevos, larvas y juveniles de...
Tipo: Journal article
Palavras-chave: Huevos; Larvas; Juveniles; Peces nativos; Chile.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382012000100008

Comparación ontogénica de la frecuencia de muda en Rhinella marina (Anura, Bufonidae)
Provedor de dados: 76
Autores: Triana,Teófila M.; Henao,Liliana M.; Bernal,Manuel H.
La muda es un proceso de renovación de la capa externa de la epidermis (estrato corneo) de los anfibios, la cual suministra protección contra daños, patógenos y pérdida de agua. Este trabajo evalúa la frecuencia de muda entre juveniles y adultos de Rhinella marina (Linnaeus, 1758) y la tasa de ocurrencia entre el día y la noche. Para esto, se realizaron dos observaciones diarias (7 am y 7 pm), entre Octubre de 2011 y Marzo de 2012, a tres grupos de individuos clasificados según su tamaño longitud rostro-cloaca, como adultos (promedio=80 mm), juveniles medianos (promedio=19 mm) y juveniles pequeños (promedio=13 mm). Estos animales fueron colocados en terrarios en el laboratorio y marcados en el dorso a través de un punto hecho con un corrector de tinta. La...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cambio de piel; Anuros; Sapo de la caña; Adultos; Juveniles.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212013000100007

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)
Provedor de dados: 76
Autores: Araújo,Isabela M. S; Silva-Falcão,Elisabeth C; Severi,William.
The present study aims to compare the buccal apparatus and gastrointestinal tract of early life stages of Centropomus undecimalis (Bloch, 1792), and relate them to its diet. A total of 190 individuals collected with a channel net in the Catuama estuary (07º40'9.9''S, 34º50'36.7''W), northern coast of the state of Pernambuco, were examined. Morphometrical and meristic data were analyzed for the two initial developmental periods (larval and juvenile). Their digestive tube was morphologically characterized and its content identified. The longest transverse axis of food items was measured, and compared to the standard length (SL) and mouth gape size (D) of the individuals. Body measurement regressions differed significantly (p&lt;0.001) between larvae and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gape size; Prey size; Larvae; Juveniles; Common snook.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000100012

Consommation d'oxygene de la crevette japonaise, Penaeus japonicus , en fonction de l'oxygenation du milieu: Effects de la temperature et de l'acclimatation a des conditions ambiantes hypoxiques
Provedor de dados: 5
Autores: Truchot, J; Jouve, D.
Oxygen consumption of juvenile prawns, Penaeus japonicus , was measured during the day at 4 temperatures (23, 26, 30 and 33 degree C) and at various oxygenation levels. For inactive prawns burrowed into sand, respiratory metabolism was maintained almost constant in hypoxia above a critical oxygen pressure of about 30-40 Torr. Data analysis according to a hyperbolic model indicates that the capacity for metabolic regulation was optimal between 26 and 30 degree C. Prawns acclimated 1-2 weeks at 20 degree C in moderate hypoxia (P sub(O2) around 50-55 Torr) showed a reinforced regulation of oxygen consumption when compared to normoxic controls.
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Juveniles; Respiration; Hypoxia; Dissolved oxygen; Temperature effects; Oxygen consumption; Crevettes Pénaeides; Température; Hypoxie; Métabolisme respiratoire.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1192.pdf

Vitamin requirements of juvenile penaeid shrimp
Provedor de dados: 5
Autores: Conklin, D.
The results of supplementing crustacean feeds with vitamins are examined specifically from the standpoint of shrimp culture. Micro-nutrients selected for discussion include: water-soluble vitamins of the B-complex, choline and inositol, vitamin C and the fat-soluble group of vitamins: A, D, E and K. Ways in which utilization of vitamins and ultimately dietary demand are altered by physiological state, conditions of culture, as well as factors which impact on feed levels, are explored.
Tipo: Text
Palavras-chave: Penaeidae; Malacostraca; Diets; Marine crustaceans; Nutrients (mineral); Nutritional requirements; Juveniles; Feed; Vitamins.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1469.pdf

Genetic structure of the common sole (Solea solea) in the Bay of Biscay: Nurseries as units of selection?
Provedor de dados: 5
Autores: Guinand, B; Rolland, Jean-luc; Bonhomme, Francois.
Coastal and estuarine areas in the Bay of Biscay are essential nursery habitats for sole (Solea solea). Using three intronic markers, we investigated patterns of genetic differentiation among cohorts of juveniles (0+, 1+, sub-adults) inhabiting four major nurseries in the Vilaine and Loire river estuaries, the Pertuis d' Antioche strait, and the Gironde estuary. Genetic differentiation was not significant for the age 0- and 1-groups, but was among sub-adult samples (theta(WC) = 0.017; P = 0.031). Hierarchical analyses of genotypic frequencies by nested multivariate ANOVA using redundancy analysis indicated that northern nurseries of Loire and Vilaine rivers had different patterns of genotypic variation with age than southern nurseries of the Pertuis d'...
Tipo: Text
Palavras-chave: Selection; Genetic drift; EPIC PCR; Population genetics; Coastal nurseries; Juveniles; Flatfish.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-4299.pdf

Impact du milieu sur les nourricieres de poissons plats de la Baie de Seine
Provedor de dados: 5
Autores: Duval, P.
This study has two objectives: (1) the knowledge of spatial and temporal characteristics of flat fish nursery grounds, and, (2) the determination of natural or man-induced factors affecting these nurseries: hydrodynamics, sediment properties, predation, competition, water quality, pollution. To protect these grounds the author proposes a fisheries management plan and an impact study before all port installations or all coastal equipment use.
Tipo: Text
Palavras-chave: Resource conservation; Predation; Juveniles; Flatfish fisheries; Pollution effects; Environmental impact; Estuarine fisheries; Nursery grounds.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1321.pdf

Les campagnes de chalutages expérimentaux en mer du Nord
Provedor de dados: 5
Autores: Verin, Yves.
Since 1976, France participates to the International Bottom Trawl Survey (IBTS), coordinated by the International Council for Exploration of the Sea (ICES). The main objective of these surveys, which are carried out on board of research vessels, was to obtain annual forecasts of recruitment for the various commercial fish species of the North Sea. These estimates were used by ICES Working Groups to assess these various stocks and to propose management measures for the following year. In addition, the data collected during these surveys concerned biological and abundance analysis of main commercial fish species exploited by European countries in the North Sea. The results of studies were published in scientific papers and have improved knowledge in this...
Tipo: Text
Palavras-chave: Fish stocks; ANE; North Sea; Juveniles; Recruitment; Abundance index; Trawling survey.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/00091/20224/17876.pdf

The nutritional requirements of the Japanese shrimp Penaeus japonicus
Provedor de dados: 5
Autores: Guillaume, Julien.
Penaeus japonicus is probably the best known species among penaeids or even among shrimps. In juveniles, the protein requirement was best studied and Japanese shrimp appears as the most demanding penaeid species. They may be related to several factors such as energy level of the diet, digestibility or biological value of protein or other nutritional factors. The essential amino acids are well known, however from a quantitative point of view the requirements in each of these amino acids remain to be determined.
Tipo: Text
Palavras-chave: Penaeus japonicus; Malacostraca; Shrimp culture; Glucosamine; Carbohydrates; Feeding; Cholesterol; Fatty acids; Amino acids; Nutritive value; Digestibility; Proteins; Diets; Juveniles.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1457.pdf

The Digestive Function of Pseudoplatystoma punctifer Early Juveniles Is Differentially Modulated by Dietary Protein, Lipid and Carbohydrate Content and Their Ratios
Provedor de dados: 5
Autores: Castro-ruiz, Diana; Andree, Karl B.; Solovyev, Mikhail M.; Fernández-méndez, Christian; García-dávila, Carmen; Cahu, Chantal; Gisbert, Enric; Darias, Maria J.
Pseudoplatystoma punctifer is an Amazonian catfish highly appreciated for its high flesh quality, size, and commercial value. Its aquaculture is pursued to satisfy the demands of an increasing population in the region. However, knowledge of the nutritional needs during the early life stages is necessary for improving growth and reducing the incidence of cannibalism, factors that limit the success of its commercial farming. This study aimed at evaluating the influence of four diets containing different protein and lipid levels (30:15, 30:10, 45:15, or 45:10 in %) in the digestive physiology and performance of early juveniles. The results showed that the dietary protein:lipid as well as carbohydrate levels and ratios influenced differently the whole-body...
Tipo: Text
Palavras-chave: Neotropical fish; Aquaculture; Digestive enzymes; Gene expression; Nutrition; Juveniles; Histology; Development; Macronutrients; Diet.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00678/79019/81420.pdf

Digenean metacercariae parasites as natural tags of habitat use by 0-group common sole Solea solea in nearshore coastal areas: A case study in the embayed system of the Pertuis Charentais (Bay of Biscay, France)
Provedor de dados: 5
Autores: Durieux, Eric; Begout, Marie-laure; Pinet, Patrick; Sasal, Pierre.
This study focused on the spatio-temporal variation in the host-parasite system, 0-group sole-digenean metacercariae, in nearshore coastal areas at relatively small spatial scale. 0-group soles were sampled using a standard beam trawl in April, May, June, August and October 2005 at nine different sites in the Pertuis Charentais area (Bay of Biscay, France). Sole density, size, Fulton's condition factor K and digenean metacercariae communities were analysed. 0-group sole concentrated in shallow and muddy areas where they accumulated digenean metacercariae. Parasite communities displayed strong spatial patterns tightly linked to the distribution of the first intermediate mollusc hosts. These parasitological data suggest that 0-group sole during their first...
Tipo: Text
Palavras-chave: Flatfish; Juveniles; Trematodes; Parasite Community; Spatio-temporal Dynamics; Habitat Use.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00008/11924/8640.pdf

Croissance de l'huitre japonaise Crassostrea gigas en cylindre rotatif Stanway. Premiers resultats en France
Provedor de dados: 5
Autores: Robert, Rene; Maurer, Daniele.
A new method of oyster cultivation, the Stanway oyster cylinder, has been experimented in the basin of Arcachon since the autumn of 1989. The first observations on three species of juvenile bivalves showed that this system could be successfully used with the Japanese oyster Crassostrea gigas . A comparative study of the growth of this last species, reared in cylinders and oyster bags, has been carried out since spring 1990. The first results showed that the growth of juveniles and 18 months old oysters in cylinders is not as good as in bags. On the other hand, mortality did not differ between both techniques: less than 3%. This new system seems to be less efficient than the traditional French way of rearing oysters. However, an improvement in the quality...
Tipo: Text
Palavras-chave: Crassostrea gigas; Bivalvia; Juveniles; Oyster culture; Growth; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-917.pdf

Some aspects of the abnormal mortalities of the pearl oysters, Pinctada margaritifera in the Tuamotu Archipelago, (French Polynesia)
Provedor de dados: 5
Autores: Cabral, P.
The black-lip pearl oyster Pinctada margaritifera lives and reproduces with high performance in most of Tuamotu Lagoons. Technics to collect spats, to culture juveniles and to operate oysters were quickly found and applicated. Nevertheless, the sudden rise of this activity has been correlated with an anarchic development. For instance, large occupation of areas in the lagoons, cultivation of numerous oysters in confined areas, lack of knowledge on the basis culture technics in many farms. In 1985, mass mortalities have appeared in some lagoons and 50 to 80% of cultured stock died. Some investigations have been done but no explanation was found. In 1988, the mortalities are still very high. An analysis of cooperative production results from 1979 to 1988...
Tipo: Text
Palavras-chave: Pinctada margaritifera; Bivalvia; Spat; Juveniles; Oyster culture; Reproduction; Pearl culture; Pearl oysters; Mortality.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1484.pdf

Fantastically plastic: fish larvae equipped for a new world
Provedor de dados: 5
Autores: Pittman, Karin; Yufera, Manuel; Pavlidis, Michail; Geffen, Audrey J.; Koven, Willian; Ribeiro, Laura; Zambonino, Jose Luiz; Tandler, Amos.
Teleost fish are more diverse than any other vertebrate group, and yet only a limited number of species are fished and farmed globally. Efforts to expand the quantity and diversity of fish produced are hampered by the extreme diversity of ontogenetic responses of fish, especially during larval development. This review looks at advances in molecular phylogeny, endocrine and nutrient influences and long-term studies of the phenotypes of commercially important fish to put the sources and consequences of this plasticity into context. This nested context of evolutionary forces of the fish-specific genome duplication, epigenetic influences, ontogenetically conserved processes like metamorphosis and cell determination is further presented in relation to how fish...
Tipo: Text
Palavras-chave: Development; Epigenetics; Fish-specific genome duplication; Juveniles; Larvae; Metamorphosis; Plasticity.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00144/25509/23655.pdf

Localisation immunohisto chimique de peptides apparentes aux hormones de vertebres chez Pecten maximus
Provedor de dados: 5
Autores: Donval, A.
Substances related to vertebrate peptidic hormones have been searched by immunohistochemical methods in Pecten maximus . Neurosecretory cells have been detected in the nervous ganglia with antisera raised against vertebrate hormones, gastrin/CCK like, glucagon like, insuline like, somatostatine like. Other gastro-intestinal hormones like are localized in some cells of the gut epithelium: bombesine and vasoactive intestinal peptide.
Tipo: Text
Palavras-chave: Pecten maximus; Bivalvia; Immunology; Histochemistry; Cells; Neurosecretory system; Juveniles; Hormones.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/acte-1724.pdf

L'activite de deplacement et le reperage de la nourriture chez le bar juvenile captif
Provedor de dados: 5
Autores: Anthouard, M; Paris, J.
Movement activity and localization of food were studied dynamically with the objective of establishing the capacities of behavioral adaptation of the young Dicentrarchus labrax faced with a novel situation. The role played by previous rearing conditions was demonstrated, the level of stimulation being a sensitive intervening factor (currents associated with the food). The data show the favourable effects of such treatment, and are in agreement with work carried out on higher vertebrates, which have brought to light the importance of early stimulation in behavioral ontogeny which respect to emotionality as well as capacities of adaptation in subjects reaching adulthood.
Tipo: Text
Palavras-chave: Dicentrarchus labrax; Serranidae; Pisces; Juveniles; Stimuli; Locating; Locomotion; Fish culture; Nutrition; Ethology.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/acte-1253.pdf

Summer mortality of hatchery-produced Pacific oyster spat (Crassostrea gigas). II. Response to selection for survival and its influence on growth and yield
Provedor de dados: 5
Autores: Degremont, Lionel; Bedier, Edouard; Boudry, Pierre.
Response to divergent selection for "high" and "low" survival during the summer period, from July to October, was investigated in juvenile (six-month-old) Pacific oysters, Crassostrea gigas, by producing two sets of progenies in 2002 (Generation 2) and three sets of progenies in 2003 (Generation 3). A strict between-family approach was used and resistance of these selected progenies to summer mortality was assessed in three sites along French coasts, to determine their response to selection and estimate realized heritability of the trait. A significant difference in survival was observed between the "high" and "low" selected groups at all sites for all sets of progenies, indicating a significant genetic component. High realized heritabilities for survival...
Tipo: Text
Palavras-chave: Crassostrea gigas; Heritability; Juveniles; Summer mortality; Survival; Growth.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/2009/publication-6950.pdf

Mineral requirement of Penaeids
Provedor de dados: 5
Autores: Piedad-pascual, F.
Marine shrimps absorb minerals from their aquatic environment aside from the minerals that come from the food they eat. Thus, the dietary requirement of shrimps for certain minerals will depend on the amounts and availability of these minerals in the aquatic environment. Dietary sources for growth may be necessary due to losses during moltings.
Tipo: Text
Palavras-chave: Penaeus californiensis; Penaeus monodon; Penaeus japonicus; Penaeidae; Malacostraca; Juveniles; Moulting; Feed efficiency; Survival; Growth; Phosphorus; Calcium; Diets; Shrimp culture; Nutritional requirements.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1454.pdf

Les bases zootechniques et biologiques de l'élevage des poissons marins
Provedor de dados: 5
Autores: Person, Jeannine.
In this synthesis of nearly 30 years of research on marine fish breeding (turbot, Scophthalmus maximus; sole, Solea solea; bass, Dicentrarchus labrax and sea bream, Sparus aurata) we present the main results acquired during the three periods devoted (1) to establishing zootechnical bases of marine fish breeding in general, theme 1, (2) to developing compound feeds adapted to young stages and optimising the feeds for juveniles, theme 2, and finally (3) to studying the impact of environmental factors on the growth capacity of sea fish juveniles, theme 3.  Some references relating to the preliminary work on sea fish farming are given at the end of the report as well as, for each stage of this research, articles considered as the most important. The...
Tipo: Text
Palavras-chave: Adaptative capacity; Feeding; Juveniles; Larvae; Zootechnics; Production; Fish farming.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/2003/rapport-2080.pdf

Review of grow-out techniques under tropical conditions: Experience of Thailand on seabass (Lates calcarifer ) and grouper (Epinephelus malabaricus)
Provedor de dados: 5
Autores: Tookwinas, S.
Seabass and grouper have been reared in cages in coastal waters in Thailand for 10 years. The fingerlings are nursed for a month in nylon nursing cages. Then, the juvenile fish are reared in culture cages which can be stationary or floating. The cage is usually 5 x 5 x 2 metres. The stocking density is around 500 to 2000 fish per cage. The survival rate is approximately 80%. The selling price at the culture site is 80 baht and 250 baht per kg for sea bass and grouper respectively. The culture method and economics of culture are explained.
Tipo: Text
Palavras-chave: Marketing; Diseases; Dissolved oxygen; Stocking density; Physicochemical properties; Water quality; Feeding; Feed; Survival; Juveniles; Nursery ponds; Floating cages; Rearing; Fish culture; Fingerlings; Growth.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1423.pdf

Development of diets for Penaeus aztecus, Penaeus setiferus, Penaeus vannamei and Penaeus stylirostris juveniles and postlarvae
Provedor de dados: 5
Autores: Zein-eldin, Z.
Laboratory Studies of penaeid feeding and nutrition were performed at the Galveston laboratory of NMFS between 1963 and 1985. Earliest studies used field-collected Penaeus aztecus postlarval and juvenile stages of both wild and laboratory-spawned P. aztecus and P. setiferus and laboratory-spawned P. vannamei and P. stylirostris were later included.
Tipo: Text
Palavras-chave: Penaeus stylirostris; Malacostraca; Dried products; Fish meal; Growth; Alginates; Spawning; Shrimp culture; Juveniles; Nutrition; Feeding.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1460.pdf

Comment épargner les juvéniles de soles et de gadidés dans la pêcherie de crevette grise, Deuxième partie
Provedor de dados: 5
Autores: Vacherot, Jean-philippe; Dupouy, Herve; Meillat, Marc.
Starting from the year 2000, the European Union planned to establish the use of a selective trawl in brown shrimp (Crangon crangon) fisheries. In fact, the brown shrimp is caught by a bottom trawl equipped with stretched 20 mm exempted meshing in estuary areas where the nurseries of flat fish and gadidae are located. For Vilaine's estuary, Dupouy et al (1997) estimated at about 1 tonne of flat fish and one tonne of gadidae the loss in equivalent fish of marketable size, per landed tonne of brown shrimp. In this document, the authors introduce improvements resulting from the use of selective trawls developed in France (Asselin and Devismes trawls), and they show by what means the selectivity of these trawls can be improved further.
Tipo: Text
Palavras-chave: Bay of Vilaine; Common shrimp; Selective trawl; Whiting; Pout; Gadides; Soles; Juveniles; Baie de Vilaine; Crevette grise; Chalut sélectif; Merlan; Tacaud; Gadidés; Soles; Juvéniles.
Ano: 1998
URL: http://archimer.ifremer.fr/doc/1998/rapport-2670.pdf

Effect of an herbivorous diet on energy balance of Litopenaeus vannamei at selected ontogenetic stages
Provedor de dados: 5
Autores: Maldonado, Carlos; Cuzon, Gerard; Guzman, Emilio; Brito, Roberto; Soto, Luis; Arena, Leticia; Gaxiola, Gabriela.
Herbivorous (20% vegetable protein, 40% carbohydrate) and carnivorous diets (40% marine animal protein, 20% carbohydrate) were experimentally tested to assess their effect on the energy balance and energetic substrates utilized by postlarvae (PL's /15 days) and juvenile shrimp (3-6 g) of Litopenaeus vannamei. Postlarval stage 60 (PL60, early juveniles) shrimps fed HeD and CaD diets, then late juveniles (3-6 g) acclimated to the same diets were tested for their respective energy partitioning potential. No significant differences (p&gt;0.05) on growth were obtained in early juveniles (mean final wet weight of 0.19 g). However in late juvenile stages a significant difference (p&lt;0.05) in growth rate was observed. In terms of energy partitioning, both early...
Tipo: Text
Palavras-chave: Energy; Juveniles; Metabolism; Protein sources; Shrimp.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-7402.pdf

Sprint swimming performance of juvenile European sea bass
Provedor de dados: 5
Autores: Nelson, J; Claireaux, Guy.
Despite its potential for determining animal success in a variety of ecologically important situations, very little is known about the sprint swimming performance of fishes. To evaluate whether selection on sprint swimming performance occurs in the wild, one must first demonstrate measurable and reproducible variation of sprint performance. In this study, we employ a computer-controlled laser detection system to study the sprint performance of 75 juvenile European sea bass Dicentrarchus labrax raised under uniform conditions in the laboratory. This percichthyid is a prized sport and food fish in Europe and similar ecologically to the North American striped bass Morone saxatilis. Individual European sea bass were subjected to endurance swimming performance...
Tipo: Text
Palavras-chave: Dicentrarchux labrax; Juveniles; Computer laser detection; Endurance; Metabolism; Swimming performance; Fish.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-887.pdf

Spatial variability in digenean metacercariae infection of 0-group common sole Solea solea among nurseries along the French Atlantic coast
Provedor de dados: 5
Autores: Durieux, Eric; Begout, Marie-laure; Sasal, Pierre.
We sampled 0-group sole juveniles (N = 174) in September and October 2003 in 9 major nurseries located along the French Atlantic coast (English Channel and Bay of Biscay). 0-group sole were infected with 3 genera of digenean metacercariae, Timoniella spp. (Acanthostomidae), Prosorhynchus crucibulum and Prosorhynchus sp. A (Bucephalidae), Podocotyle sp. (Opecoelidae), and an unidentified species of Digenea. Parasite infection levels in the English Channel nurseries were lower, and the community composition was different from Bay of Biscay nurseries. We hypothesize that the difference between geographic areas was due to differences in first intermediate host communities and, to a lesser extent, because of lower temperatures in the English Channel compared to...
Tipo: Text
Palavras-chave: River flow; Habitat quality; Trematodes; Parasitism; Juveniles; Flatfish.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2640.pdf

Biometrie et Croissance des Jeunes Crevettes Trachypenaeus de la Guadeloupe (Antilles Francaises).
Provedor de dados: 5
The principal biometric relations of juvenile Trachypenaeus similis similis and T. constrictus in Guadeloupe were calculated from 1976 to 1978. The examination of these relations yields few differences between the two species. A growth curve was established according to the sequences of modal values; these were determined according to weekly size frequency distributions over three different periods of time. In the zone studied, the growth of young Trachypenaeus is more rapid than that of the young Penaeus.
Tipo: Text
Palavras-chave: Trachypenaeus; Juveniles; Size distribution; Growth curves; Biometrics.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1932.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

Differentiation de juveniles de Chlamys varia et Chlamys opercularis
Provedor de dados: 5
Autores: Morizur, Yvon.
The recent developments in collecting techniques for spat of Chlamys operoularis and Chlamys varia make it necessary to find criteria for separating these two species at early life stages. Biométrie criteria for differenciating between species have been found to be usable on individuals of a height superior to 3 mm. A quick différenciation of smaller individuals is possible by observation, under light microscope, of the périostracum external morphology on left valves.
Tipo: Text
Palavras-chave: Chlamys; Aquaculture techniques; Juveniles.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/acte-2343.pdf

Strategie de repeuplement du mollusque gasteropode Concholepas concholepas (B) au sud du Chili
Provedor de dados: 5
Autores: Varelasantibanez, C.
The reproducers are kept in the laboratory throughout the year and the egg-carrying capsules can be stimulated during this entire period. The capsules are then transferred to the natural environment where hatching takes place. Moreover, juveniles taken in the natural environment can be farmed in suspended systems, at sea, where their growth is faster than in a controlled environment.
Tipo: Text
Palavras-chave: Chile; Concholepas concholepas; Gastropoda; Marine molluscs; Nutrition; Raft culture; Juveniles; Hatcheries; Growth; Laboratory culture; Sexual reproduction; Aquaculture; Rearing.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/1992/acte-927.pdf

Recent advances in Australian prawns diseases and pathology
Provedor de dados: 5
Autores: Owens, L; Hall, M.
Disease is always limiting in animal production and new syndromes occur in fledgling industries. This paper describes the latest findings in this area.
Tipo: Text
Palavras-chave: Vibrio damsela; Macrobrachium rosenbergii; Malacostraca; Bacteria; Septicaemia; Aetiology; Viruses; Juveniles; Ovaries; Larvae; Pathology; Viral diseases.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/1989/acte-1461.pdf

Summer mortality of hatchery-produced Pacific oyster spat (Crassostrea gigas). I. Estimation of genetic parameters for survival and growth
Provedor de dados: 5
Autores: Degremont, Lionel; Ernande, Bruno; Bedier, Edouard; Boudry, Pierre.
The multidisciplinary project "MOREST" aims to improve our understanding of causes of summer mortality in Crassostrea gigas juveniles in France and to reduce its impact on oyster production. As pail of the MOREST project, 43 full-sib families nested within 17 half-sib families were produced, planted out and tested in 3 sites during summer 2001 to assess to what extent genetic variability exists for this trait. A strong genetic basis was found for survival as narrow-sense heritability estimates ranged from 0.47 to 1.08, with higher values in sites where summer mortality was higher. Genetic correlations across sites were positive and very high for survival, indicating no genotype by environment interaction. In contrast, lower genetic variation was observed...
Tipo: Text
Palavras-chave: Growth; Survival; Juveniles; Heritability; Crassostrea gigas.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2457.pdf

Fine scale geographic residence and annual primary production drive body condition of wild immature green turtles (   Chelonia mydas   ) in Martinique Island (Lesser Antilles)
Provedor de dados: 5
Autores: Bonola, Marc; Girondot, Marc; Robin, Jean-patrice; Martin, Jordan; Siegwalt, Flora; Jeantet, Lorène; Lelong, Pierre; Grand, Clément; Chambault, Philippine; Etienne, Denis; Gresser, Julie; Hielard, Gaëlle; Alexandre, Arqué; Régis, Sidney; Nicolas, Laurence; Frouin, Cédric; Lefebvre, Fabien; Sutter, Emmanuel; Vedie, Fabien; Barnerias, Cyrille; Laurent, Thieulle; Bordes, Robinson; Guimera, Christelle; Aubert, Nathalie; Bouaziz, Myriam; Pinson, Adrien; Frédéric, Flora; Matthieu, Duru; Benhalilou, Abdelwahab; Céline, Murgale; Maillet, Thomas; Andreani, Lucas; Campistron, Guilhem; Sikora, Maxym; Rateau, Fabian; Francis, George; Joffrey, Eggenspieler; Woignier, Thierry; Allenou, Jean-pierre; Louis-jean, Laurent; Chanteur, Bénédicte; Béranger, Christelle; Crillon, Jessica; Brador, Aude; Habold, Caroline; Le Maho, Yvon; Chevallier, Damien.
The change of animal biometrics (body mass and body size) can reveal important information about their living environment as well as determine the survival potential and reproductive success of individuals and thus the persistence of populations. However, weighing individuals like marine turtles in the field presents important logistical difficulties. In this context, estimating body mass based on body size is a crucial issue. Furthermore, the determinants of the variability of the parameters for this relationship can provide information about the quality of the environment and the manner in which individuals exploit the available resources. This is of particular importance in young individuals which growth quality might be a determinant of adult fitness....
Tipo: Text
Palavras-chave: Green turtles; Juveniles; Body mass; Body condition; Biometry.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00593/70493/68640.pdf

Redescription of Astyanax erythropterus (Holmberg, 1891) (Teleostei: Characiformes: Characidae) from La Plata basin in Argentina
Provedor de dados: 83
Autores: Soneira,Paula; Casciotta,Jorge; Almirón,Adriana; Ciotek,Liliana; Giorgis,Pablo.
Astyanax erythropterus (Holmberg, 1891) originally described on the basis of one juvenile, is redescribed herein based on juveniles and adults from the type-localiy. The species differs from its congeners by the combination of 11-13 transverse rows scales above lateral line and 8-10 rows below lateral line; 49-54 perforated scales in the lateral series; iii-v,38-42 anal-fin rays, and dorsal, anal and caudal fins vermilion red in juveniles. The vermilion red coloration of unpaired fins in juveniles of Astyanax is only known in A. correntinus.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Neotropical region; Color pattern; Juveniles.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000400007

Effects of reservoirs water level variations on fish recruitment
Provedor de dados: 83
Autores: Lima,Fabíula T. de; Reynalte-Tataje,David A.; Zaniboni-Filho,Evoy.
ABSTRACT The construction of hydroelectric power plants has many social and environmental impacts. Among them, the impacts on fish communities, which habitats are drastically modified by dams, with consequences across the ecosystem. This study aimed to assess the influence of water level (WL) variations in the reservoirs of the Itá and Machadinho hydroelectric plants on the recruitment of fish species from the upper Uruguay River in southern Brazil. The data analyzed resulted from the WL variation produced exclusively by the hydroelectric plants generation and were collected between the years 2001 and 2012. The results showed significant correlations between the abundance of juvenile fish and the hydrological parameters only for some reproductive guilds....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrological Parameters; Itá; Juveniles; Machadinho; Reproduction; Uruguay River.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300211

Composition, density and biomass of fish community from the surf zone as a function of the lunar cycle at Miramar Beach in Cabedelo, Paraíba
Provedor de dados: 83
Autores: Pessoa,Willy Vila Nova; Ramos,Jonas de Assis Almeida; Oliveira,Paulo Guilherme Vasconcelos de.
ABSTRACT The influence of the moon cycles on the ichthyofauna has been little studied in the surf zone. In this study, the number of species, density and biomass were evaluated as a function of the moon. A total of 49 species distributed in 24 families were captured in two areas of Miramar beach. The mean density was significant high in the weaning and low in the new moon, while density and biomass together showed differences for areas. The most abundant species were Anchoa tricolor and Trachinotus falcatus (new moon), and Anchovia clupeoides showed significant differences in the waning moon. The RDA indicates that turbidity influenced significantly the presence of two species group. The group I were represented by Stellifer brasiliensis, Trachinotus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Juveniles; Marine ecology; Marine fishes; Spatiotemporal pattern; Seine net.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200209

Fish assemblages along a morphodynamic continuum on three tropical beaches
Provedor de dados: 83
Autores: Oliveira,Ronnie E. M. C. C.; Pessanha,André L. M.
A comparative study involving three mesotidal beaches from reflective to estuarine states was conducted between October 2010 and September 2011 in the estuary of Mamanguape River, northeastern Brazil. The aim was to test for differences in fish assemblages along a morphodynamic continuum, particularly the effects of wave action. In total, 3,732 fish from 71 species were examined; Rhinosardinia bahiensisand Atherinella brasiliensisdominated the estuarine beach, whereas Trachinotus carolinus dominated the reflective beach. Fish assemblages were structured by spatial differences among the sites, and overall abundance, richness and biomass demonstrated a clear increasing trend from the reflective to the estuarine beaches, indicating a primary influence of wave...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community descriptors; Juveniles; Nursery; Spatial patterns; Wave action.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100165

Evaluación de niveles de proteína y densidades de siembra en el crecimiento del camarón blanco Litopenaeus schmitti
Provedor de dados: 20
Autores: Fraga, I.; Galindo, J.; de Arazoza, M.; Sanchez, A.; Jaime Ceballos, B.; Alvarez, S.
Para evaluar el efecto de diferentes niveles de proteína y densidades de siembra sobre el crecimiento de juveniles de camarón Litopaneus schmitti, se desarrolló un diseño experimental totalmente aleatorizado en estanque de tierra durante 72 días, con 16 tratamientos y 3 repeticiones, combinando tres niveles de proteína alimentar para definir la contribución del alimento natural al crecimiento de los camarones. La contribución del alimento natural al crecimiento fue entre 58.2 - 87.9% y los copépodos constituyeron el 65% del total de organismos del zoobentos. Una alta correlación negativa se encontró entre la cantidad de organismos epibentónicos y las densidades de siembra ensayadas.
Tipo: Journal Contribution
Palavras-chave: Diets; Juveniles; Pond culture; Shrimp culture; Animal growth; Proteins; Proteins; Juveniles; Http://aims.fao.org/aos/agrovoc/c_6259; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2002
URL: http://hdl.handle.net/1834/1808

Fecundidad e índice de prerreclutas de merluza en el sector costero norpatagónico
Provedor de dados: 20
Autores: Ehrlich, M.D.; Macchi, G.J.
Hake Merluccius hubbsi fecundity was estimated with the gravimetric method using ovaries with hydrated oocytes without post-ovulatory follicles. Samples were obtained in three research cruises in the Argentine Sea, off Chubut Province, SW of Peninsula Valdes between 42°S and 45°S, near Isla Escondida, during December 1993, 1994 and 1996, time which coincides with the most important reproductive activity. Relative fecundity values were 722 plus or minus 107, 606 plus or minus 60 and 533 plus or minus 26 oocytes per gram of female without ovaries, respectively. Partial fecundity was adjusted to a potential model for total length and weight without ovaries, corresponding: F=0.9988 Lt3.294 and F=197.91 P1.1585 for 1994 and F=6.9785 Lt2.816 and F=552.22 P0.9889...
Tipo: Journal Contribution
Palavras-chave: Fishery surveys; Juveniles; Fecundity; Gadoid fisheries; Stock assessment; Stock assessment; Juveniles; Fecundity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_15725.
Ano: 2003
URL: http://hdl.handle.net/1834/2415

Áreas potenciales de descarte de merluza para la actividad de la flota comercial argentina
Provedor de dados: 20
Autores: Dato, C.V.; Villarino, M.F.; Cañete, G.R.
To improve the quality of the resource assessment it is necessary to estimate discards and quantify them applying an adequate methodology. The purpose of this work is to detect areas where the activity of the commercial fleet coincides with zones of high concentration of juveniles because they are potential discard areas. To establish possible seasonal and/or interannual variations, length distribution data derived from hake research surveys carried out on board of INIDEP vessels during the 1986-1993 period were analyzed. Samples were grouped per statistical rectangle on the basis of catch weighted average and mean, variance, skewness and kurtosis were calculated. The resulting parameters were subjected to a cluster analysis using the Euclidean distance...
Tipo: Journal Contribution
Palavras-chave: Gadoid fisheries; Commercial fishing; Fishing grounds; Juveniles; Fishing effort; Seasonal variations; Fishing grounds; Juveniles; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_2947; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_24027.
Ano: 2006
URL: http://hdl.handle.net/1834/1586

Consideraciones sobre el crecimiento de la caballa (Scomber japonicus marplatensis)durante su primer año de vida
Provedor de dados: 20
Autores: Sánchez, R.P.
Through the analysis of the morphological changes ocurring in the process of growth, it was possible to identify three stages (primary juvenile: 25-75 mm; secondary juvenile: 76-160 mm; and juvenile preadult: 161-250 mm)during the first year of the species life. Regression equations for the different relations studied: body weight/body lenght, body surface/body lenght, body surface/body weight, and metabolic rate/body lenght, have been calculated for each stage. The variation of the number of gill rakers, mean distance between adjacent rakers and mean values of gill rakers lenght in reference to body growth was studied, and the relation between filtering area and body length was established.
Tipo: Journal Contribution
Palavras-chave: Length-weight relationships; Condition factor; Gills; Juveniles; Mackerel fisheries; Gills; Http://aims.fao.org/aos/agrovoc/c_3262.
Ano: 1982
URL: http://hdl.handle.net/1834/2047

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

Influences des parametres physicochimiques sur l’evolution des stades de mues des juveniles de penaeus monodon. cas de la ferme de l’Aqualma Besalampy: Aquaculture et pêche
Provedor de dados: 20
Autores: Mamitiana Fabrice.
La ferme de l’AQUALAMA Besalampy est confrontée à un problème de mue des juvéniles de crevettes Penaeus monodon durant leurs transfert du bassin de pré-grossissement vers les bassins de grossissement. Le pourcentage des crevettes molles dépasse le seuil 10% durant la pêche. On est obligé alors d’arrêter le transfert et de le rapporter à un autre jour. L’arrêt fréquent du programme de transfert perturbe le planning déjà établi par la société. Afin d’essayer de trouver les raisons qui déclenchent spontanément la mue des juvéniles, on a effectué le suivi des paramètres physico-chimique de l’eau (pH, température, salinité, oxygène dissous, profondeur de l’eau, les marées, la gestion d’eau,…) durant l’élevage et durant le transfert. On a constaté alors que le...
Tipo: Theses and Dissertations
Palavras-chave: Juveniles; Physiochemistry; Shrimp farming; Penaeus monodon.
Ano: 2004
URL: http://hdl.handle.net/1834/4994

Los habitats costeros de los juveniles de peces en la Región de Punta Gloria a la Isla de Salamanca, Caribe colombiano
Provedor de dados: 20
Autores: González-Afanador, E.
Se presentan y discuten algunos resultados del estudio ecológico de los habitáis costeros ocupados por juveniles de peces, realizado entre junio de 1979 y mayo de 1980, en el trayecto comprendido entre Punta Gloria al SE de Santa Marta y la Isla de Salamanca en la costa Caribe colombiana. Los cuatro habitáis estudiados fueron riberas marinas someras, lagunas costeras (Punta Gloría y Costa Verde) y boca del estuario (Ciénaga Grande). Los factores abióticos considerados fueron la temperatura y salinidad del agua superficial; se analiza su relación con el régimen climático e hidrológico regional del área. Se describen cambios en tamaño y forma de los habitáis estudiados.  Por otra parte se presenta una lista sistemática de los peces colectados, una estimación...
Tipo: Journal Contribution
Palavras-chave: Fish; Juveniles; Coastal lagoons; Abiotic factors; Fish; Juveniles; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_15903; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_1697.
Ano: 1984
URL: http://hdl.handle.net/1834/4038

Effect of shrimp head meal inclusion level in litopenaeus schmitti juveniles diet.
Provedor de dados: 20
Autores: Jaime Ceballos, B. J.; Fraga Castro, I.; Galindo López, J.; Alvarez Capote, J.S.
This study determined the effect of different shrimp head meal (SHM) levels (0, 5, 15, 25 and 30%) in practical diets for Caribbean white shrimp juveniles Litopenaeus schmitti (0.29 ± 0.0025 g). A totally randomized experimental design was carried out under laboratory conditions during 54 days. There were no significant differences (p &gt; 0.05) in survival of shrimps in all treatments evaluated. This result indicated that SHM included at 5, 15 and 25% in diet promoted growth. The relation of SHM inclusion level in diet with final weight (FW), food conversion rate (FCR) and protein efficiency ratio (PER) were described by the following quadratic equation: FW = 0.8023 + 0.0604 S - 0.0018 S2, 2 =0.81; FCR = 8.0019 - 0.6081 S + 0.0164 S2, R2 =0.82 and PER =...
Tipo: Journal Contribution
Palavras-chave: Shrimp culture; Diets; Juveniles; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2009
URL: http://hdl.handle.net/1834/3018

Postlarvas y juveniles de camarones Farfantepenaeus spp y Xiphopenaeus kroyeri en la Boca de la Barra (Ciénaga Grande de Santa Marta), Caribe colombiano
Provedor de dados: 20
Autores: López, A.C.; García, C.B.
Postlarvae and juveniles of Farfantepenaeus spp. and Xiphopenaeus kroyeri were collected at Boca de la Barra (Ciénaga Grande de Santa Marta), by means of a channel net that orientates with the tide. Sampling was carried out every two weeks for ayear (February 1998 – February 1999), so that each sampling date corresponded to full and new moon alternatively. Farfantepenaeus spp. postlarvae tended to appear in the dry season and with significantly greater abundance during full moon (Mann-Whitney test, P&lt;0.05). Juveniles showed a different pattern: there were significant differences between seasons (Mann-Whitney test, P&lt; 0.05) with higher concentrations in the rainy season, but not so between moon phases (Mann-Whitney test, P&gt;0.05). In the case of X....
Tipo: Journal Contribution
Palavras-chave: Juveniles; Temporal distribution; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2001
URL: http://hdl.handle.net/1834/3198

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

Evaluación de la harina de calamar en dietas para juveniles de Tortuga carey (Eretmochelys imbricata)
Provedor de dados: 20
Autores: Pelegrín, E.; Alvarez, S.; Galindo, J.; Regueira, E.
Un diseño experimental completamente aleatorizado en condiciones controladas de laboratorio se desarrolló durante 89 días, con el objetivo de conocer el efecto sobre el crecimiento y otros parámetros nutricionales de la harina de calamar en dietas para tortuga carey Eretmochelys imbricata. Se emplearon juveniles de 28.7 ± 5.28 g de peso inicial promedio y 6.5 ± 0.43 cm de largo inicial promedio del caparazón. Se evaluaron cuatro dietas prácticas con 0, 5, 10 y 15% de harina de calamar. Los animales que se alimentaron con las dietas que contenían harina de calamar presentaron los mejores resultados en cuanto a ganancia en peso y largo final, difiriendo significativamente (P&lt;0.05) con los que no consumieron este ingrediente. Los mejores valores del índice...
Tipo: Proceedings Paper
Palavras-chave: Fish meal; Diets; Proteins; Juveniles; Turtle culture; Nutritional requirements; Turtle culture; Fish meal; Juveniles; Proteins; Nutritional requirements; Http://aims.fao.org/aos/agrovoc/c_8022; Http://aims.fao.org/aos/agrovoc/c_2925; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_6259; Http://aims.fao.org/aos/agrovoc/c_5277.
Ano: 2006
URL: http://hdl.handle.net/1834/1885

Etude du recrutement en civelles ( Anguilla Anguilla L. 1758 ) dans l' estuaire du Sebou au cours de la saison de pêche 1980-1981
Provedor de dados: 20
Autores: Yahyaoui, A.; Aguesse, P.; Beaubrun, P.
Le recrutement en civelles dans l'estuaire du Sebou (Côte atlantique marocaine)est étudié au cours de la saison de pêche de 1980-1981.Le phénomène s'observe d'octobre à juillet.Les remontées s'effectuent par bancs successifs constitués d'individus de plus en plus petits, de décembre à fin avril.Une stabulation estivale est notée à partir de mai.
Tipo: Journal Contribution
Palavras-chave: River fisheries; Season regulations; Recruitment; Juveniles.
Ano: 1983
URL: http://hdl.handle.net/1834/178

Juvenile penaeid shrimp density, spatial distribution and size composition in four adjacent habitats within a Mangrove-Fringed Bay on Inhaca Island, Mozambique
Provedor de dados: 20
Autores: Macia, A.
The effects of habitat characteristics (mangrove creek, sandflat, mudflat and seagrass meadow) water salinity, temperature, and depth on the density, spatial distribution and size distribution of juveniles of five commercially important penaied shrimp species (Metapenaus monoceros, M. stebbingi, Fenneropenaeus indicus, Penaeus japonicus and P. semisulcatus) were investigated during a high shrimp recruitment peak lasting from January to June 2002, in four contiguous habitats within a non-estuarine mangrove bay at Saco da Inhaca, Inhaca Island, Southern Mozambique. A total of 14,976 specimens representing the five species were collected by means of a 1m beam-trawl fitted with a 2 mm mesh net with a cod-end. Every two weeks corresponding with spring tides on...
Tipo: Journal Contribution
Palavras-chave: METAPENAUS MONOCEROS; FENNEROPENAEUS INDICUS; METAPENAEUS STEBBINGI; PENAEUS  SEMISULCATUS; MARSUPENAEUS JAPONICUS; Distribution; Habitat; Juveniles; Salinity; Shrimp culture; Penaeid shrimp fisheries; Mangrove swamps; Seagrass; Mud flats; Distribution; Juveniles; Salinity.
Ano: 2004
URL: http://hdl.handle.net/1834/1121

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

Food and feeding habits of juveniles of some culturable fish species in Nigeria
Provedor de dados: 20
Autores: Ugwumba, A.A.A.
The food and feeding habits of juveniles of eleven culturable fish species are reported. Overlap in feeding habits, inter and intra-specific competition for food in the species are discussed.
Tipo: Report
Palavras-chave: Aquaculture development; Fishery resources; Juveniles.
Ano: 1988
URL: http://hdl.handle.net/1834/2203

Escape de juveniles de merluza (Merluccius hubbsi) en las redes de arrastre de fondo, mediante la aplicación del dispositivo de selectividad DEJUPA con diferentes distancias entre varillas, utilizando un diseño especial de copo re retencion en la grilla.
Provedor de dados: 20
Autores: Ercoli, R.; Garcia, J.C.; Aubone, A.; Salvini, L.; Bertelo, R.
This work reports on the inter rod distance in a single sorting grid adapted for the escape of hake juveniles. A good performance of the device was reported due to the DEJUPA trials carried out in April 1997. In may 1998 a new survey with DEJUPA was carrie out with 30 mm, 33 mm, and 40 mm separation distance bars, in order to optimise the escape of the species at first length maturity (35 cm). Selectivity curves with maximum likelihood method were obtained for each inter rod distance being the length at 50.  (L50) 29, 32 and 37 respectively. A weighd lineal regression (Feasible General Squares Model) between L50 and inter rod distance was fitted from each L50 estimated variance. An estimation of 37 mm inter rod distance for L50=35 cm total length was...
Tipo: Journal Contribution
Palavras-chave: Gear selectivity; Bottom trawls; Juveniles; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2000
URL: http://hdl.handle.net/1834/2536

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

Composición y densidad de corales juveniles en dos arrecifes profundos de San Andrés Isla, Caribe colombiano
Provedor de dados: 20
Autores: Vidal, A.M.; Villamil, C.M.; Acosta, A.
Coral recruitment determines the maintenance, renovation and future of the coral community. In order to determine the composition, density and importance value of scleractinian juvenile corals (&lt;2 or &lt; 4 cm of diameter; depending of the species) two localities were sampled (Reggae Nest and El Faro) at the deep leeward terrace site of San Andres Island. Also, in 47 quadrants of 1m2 distributed throughout a guide line, frequency of partial mortality, total diseases and depredation signs in juvenile corals were quantified. A total of 397 juveniles of 16 species were  egistered. The average density and richness of juveniles were not significantly different between Reggae Nest and El Faro. The average density of both localities was high compared to other...
Tipo: Journal Contribution
Palavras-chave: Juveniles; Composition; Density; Coral; Density; Juveniles; Http://aims.fao.org/aos/agrovoc/c_2186; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2005
URL: http://hdl.handle.net/1834/2015

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

Crecimiento del lenguado Paralichthys orbignyanus (Valenciennes, 1839) en condiciones de cultivo
Provedor de dados: 20
Autores: Fraysse, C.; Petraroia, A.
Mariculture in Argentina has expanded over the last years. Flounders of the Paralichtydae family are a very important fishery resource due to their abundance, meat quality, and high market price. The first mass production of juveniles of Paralichthys orbignyanus in captivity was successfully performed in 2002 at the Estación Experimental de Maricultura (EEM), Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata. Moreover, it has got potential as a species for cultivation, due to its behaviour in captivity, good growth, survival and feed conversion rates. In this study, the parameters that affect this flounder cultivation under controlled conditions and in closed recirculating seawater system, are presented. Temperature, pH, and...
Tipo: Theses and Dissertations
Palavras-chave: Fish culture; Controlled conditions; Recirculating systems; Juveniles; Marine aquaculture.
Ano: 2013
URL: http://hdl.handle.net/1834/5445

Efecto de diferentes relaciones proteína/energía en el crecimiento de juveniles de Langosta espinosa (Panulirus argus)
Provedor de dados: 20
Autores: Fraga, I.; Galindo, J.; de Arazoza, M.; Blanco, W.; Díaz-Iglesias, E.; Báez, M.; Bravet, E.
Para evaluar el efecto de diferentes relaciones proteína/energía en el crecimiento de juveniles de langosta Panulirus argus (peso medio inicial de 180 ± 3.8 g), se desarrolló un diseño experimental totalmente aleatorizado durante 5 meses, con 7 tratamientos y 16 repeticiones. Se ensayaron dietas con 25, 35 y 45% de proteína, con niveles altos y bajos de energía (324-359 Kcal/100 g) y relaciones proteína/energía entre 70.5 y 137.2 mg de proteína/Kcal. Al final del bioensayo se determinaron los indicadores nutricionales básicos y se comparó el flujo energético producido en la respiración y excreción nitrogenada entre langostas alimentadas con las dietas isocalóricas (356 Kcal/100 g) de 25 y 45% de proteína. Se concluyó que las langostas requieren para crecer...
Tipo: Proceedings Paper
Palavras-chave: Juveniles; Feeding experiments; Animal growth; Proteins; Lobster culture; Juveniles; Proteins; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_6259.
Ano: 2002
URL: http://hdl.handle.net/1834/1879

Identificación de las primeras marcas de crecimiento en los otolitos de juveniles de castañeta Cheilodactylus bergi (Pisces:Cheilodactylidae).
Provedor de dados: 20
Autores: Wöhler, O.C.
Hyaline or slow growth rings were identified in juvenile castañeta otoliths Cheilodactylus bergi, with the aim of establishing an objective criteria for age determination in this life stage.Samples were obtained from four research cruises carried out between 1988 and 1991 in the north-patagonian continental shelf and Argentine-Uruguayan Common Fishing Zone (CFZ)(SW Atlantic, between 34° and 47°S). Through measurement of sagitta otoliths, the existence of three hyaline rings was determined. The one closer to the nucleusis formed during the first winter in the fish life or when larval metamorphosis occurs (1-2 months after spawning peak). The second ring was related to the transitional period between postlarvae and juvenile. This involves a habitat change,...
Tipo: Journal Contribution
Palavras-chave: Age determination; Otoliths; Juveniles; Age determination; Otoliths; Juveniles; Http://aims.fao.org/aos/agrovoc/c_24110; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 1997
URL: http://hdl.handle.net/1834/1925

Requerimientos nutricionales de juveniles de camarón blanco (Litopenaeus schmitti): evaluación de dietas prácticas
Provedor de dados: 20
Autores: Galindo, J.; Fraga, I.; de Arazoza, M.; Alvarez, S.; Ramos, D.; González, R.
Con el objetivo de determinar el efecto de diferentes relaciones proteína/energía (P/E), sobre el crecimiento de juveniles de Camarón Blanco Litopenaeus schmitti , mediante la utilización de dietas prácticas, se desarrolló un diseño experimental completamente aleatorizado, a escala de laboratorio, durante 59 días. Se evaluaron 12 dietas con diferentes niveles de inclusión de proteínas, lípidos y carbohidratos. El crecimiento fue mayor en los camarones que se alimentaron con las dietas que contenían 33 y 28% de proteína, alcanzando su valor máximo en el intervalo de la relación P/E comprendido entre 105-127 mg de proteína/Kcal. Los indicadores nutricionales evaluados, también fueron mejores para aquellos organismos alimentados con las dietas de alto...
Tipo: Proceedings Paper
Palavras-chave: Nutritional requirements; Prawn culture; Diets; Animal growth; Juveniles; Nutritional requirements; Juveniles; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2002
URL: http://hdl.handle.net/1834/1880

Ecología trófica de estadios juveniles de los esciénidos dominantes en el estuario de Bahía Blanca. Pescadilla de red (Cynoscion guatucupa) y corvina rubia (Micropogonias furnieri)
Provedor de dados: 20
Autores: Sardiña, P.
Striped weakfish (Cynoscion guatucupa)and whitemouth croaker(Micropogonias furnieri)are one of the most important coastal resources of Bahia Blanca Estuary (Buenos Aires Prov., Argentina). The aims of this thesis were: 1, to analyze the population and morphological characteristics of the juveniles stages of the striped weakfish and the whitemouth croaker living in Bahia Blanca Estuary; 2, to describe the dietary habits of the juveniles of these two species; 3, to analyze the ontogenetic and seasonal diet changes in both species, and 4, to study the feeding interrelationships between both species as well as the interrelationships between each species and its prey. In view of the mentioned objectives, diet was evaluated taking into account the following...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater environment; Brackishwater fish; Comparative studies; Feeding behaviour; Trophic relationships; Zooplankton; Juveniles; Feeding behaviour; Zooplankton; Brackishwater environment; Juveniles; Http://aims.fao.org/aos/agrovoc/c_10778; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_1050; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2004
URL: http://hdl.handle.net/1834/2595

Índice de abundancia del grupo merluza de edad 2 en el área de cría patagónica. Período 1995-1998
Provedor de dados: 20
Autores: Castrucci, R.; Aubone, A.; Pérez, M.; Renzi, M.A.
An abundance index of hake Merluccius hubbsi individuals age 2 was estimated in the nursery area south of 41°S Argentine Sea, SW Atlantic. The analysis comprised the 1995-1998 period and was made with data derived from research surveys programmed to that end. A mean value estimator of CPUE catch in number of individuals per trawl hour based on delta distribution was used. The spatial distribution of CPUE of age groups 1 and 2 in the area surveyed, total length distribution per survey and the corresponding age composition are presented. The declining trend of abundance index of hake age 2 observed during the four year period amounted to 52.9.
Tipo: Journal Contribution
Palavras-chave: Nursery grounds; Juveniles; Abundance; Stock assessment; Gadoid fisheries; Stock assessment; Nursery grounds; Juveniles; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_25438; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2003
URL: http://hdl.handle.net/1834/2477

Efectos de temperatura y salinidad sobre el crecimiento de juveniles de besugo Pagrus pagrus (Linné,1758)(Actinopterygii; Perciformes) en sistemas de recirculación cerrada
Provedor de dados: 20
Autores: Suárez, J.
The growth and survival of juvenile red porgy, Pagrus pagrus, reared in captivity (mean body weigth 81.0 not equal to 37.24g), exposed to two different temperatures (18 degree and 22 degree C)and three salinities (21, 27 and 33 psu)during a 30 day period, were studied. Final survival rate was 100. in all treatments. The highest growth rate was reached at 18 degree C/33 psu with a value of 1.07 /day. There was an inverse trend in the growth rate between the two temperatures. Food consumption increased with the increase of salinity and temperature. The highest food consumption rate was 1.17. (18 degree C/33 psu). The relationships between protein efficiency ration (PER)and salinity were positive at 18 degree C and negative at 22 degree C. The highest values...
Tipo: Theses and Dissertations
Palavras-chave: Environmental effects; Fish culture; Food consumption; Growth; Juveniles; Recirculating systems; Survival; Marine aquaculture; Fish culture; Food consumption; Growth; Juveniles; Survival; Http://aims.fao.org/aos/agrovoc/c_2918; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_7538.
Ano: 2004
URL: http://hdl.handle.net/1834/2601

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

Variación espacial y temporal de juveniles de Pinctada imbricata (Röding, 1798) y Argopecten nucleus (Born, 1778) en la región Norte del caribe colombiano
Provedor de dados: 20
Autores: Castellanos, C.; Campos, N.H.
Con el propósito de conocer la respuesta de juveniles de bivalvos frente a los cambios en la condición hidrográfica, fue evaluada la variación espacial (regiones, bahías y profundidades) y temporal (períodos climáticos) de la abundancia de Pinctada imbricata y Argopecten nucleus en la región norte del Caribe colombiano. Esta variación fue determinada en dos fases, a partir de la fijación de los individuos en colectores artificiales. La primera fase, entre 1994 y 1996 fue realizada en el Parque Nacional Natural Tayrona (PNNT) donde se comparó la abundancia de juveniles en Bahía Concha y Bahía Chengue a 5, 10, 15 y 20 m de profundidad; fueron establecidas diferencias entre los factores considerados; la mayor abundancia promedio a 5 m para Pinctada imbricata...
Tipo: Journal Contribution
Palavras-chave: Abundance; Juveniles; Juveniles; Http://aims.fao.org/aos/agrovoc/c_25393.
Ano: 2007
URL: http://hdl.handle.net/1834/3516

Impact of starvation and of feeding algal and artificial diets on the lipid content and composition of juvenile oysters &lt;i&gt;(Crassostrea gigas)&lt;/i&gt; and clams &lt;i&gt;(Tapes philippinarum)&lt;/i&gt;
Provedor de dados: 27
Autores: Caers, M.; Coutteau, P.; Sorgeloos, P.
The present study evaluated the effect of starvation and of feeding various algal and lipid-supplemented diets on the lipid content and lipid class distribution in the polar and neutral lipids of early juvenile oysters (&lt;i&gt;Crassostrea gigas&lt;/i&gt; and clams (&lt;i&gt;Tapes philippinarum&lt;/i&gt;). &lt;i&gt;T. philippinarum&lt;/i&gt; was starved, fed a mixed algal diet (&lt;i&gt;Tetraselmis suecica&lt;/i&gt; and &lt;i&gt;Isochrysis galbana&lt;/i&gt; (clone T-iso) or solely &lt;i&gt;T. suecica&lt;/i&gt; at three different feeding rations, either supplemented or not supplemented with lipid emulsions. &lt;i&gt;C. gigas&lt;/i&gt; was fed &lt;i&gt;T. suecica&lt;/i&gt; with and without the supplementation of lipid emulsions or liposomes. When...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biochemical analysis; Feeding experiments; Juveniles; Lipids; Starvation; Crassostrea gigas [Portuguese oyster]; Isochrysis galbana.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2679

Early postlarval fish in the hyperbenthos of the Dutch Delta (south-west Netherlands)
Provedor de dados: 27
Autores: Beyst, B.; Mees, J.; Cattrijsse, A.
Early (post)larval fish constitute a significant part of the temporary hyperbenthos, i.e. of the fauna living in the lower reaches of the water column close to the substratum. Information on the densities and spatial and temporal variations of these stages, as well as on their lengths at the moment of occurrence, can be an important contribution to the knowledge of their dispersion, migrations and to the identification of possible bottlenecks in their recruitment. Therefore the hyperbenthos of the Voordelta, a shallow coastal zone in front of the Dutch Delta, as well as that of the subtidal channels and the intertidal brackish marsh creeks of the Westerschelde Estuary, was sampled monthly during one year by means of a sledge and a stow net. A total of 37...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Deltas; Dominant species; Ecological distribution; Estuaries; Intertidal environment; Juveniles; Marine fish; Nursery grounds; Pleuronectes; Population density; Salt marshes; Sprattus sprattus; Wetlands; Zoobenthos; Clupea harengus; Dicentrarchus labrax [Bass]; Solea solea [Sole].
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3979

Post-marsupial development of Hyalella pleoacuta (Crustacea: Amphipoda): stages 1-4
Provedor de dados: 103
Autores: Garcia-Schroeder,Deise Leda; Araujo,Paula Beatriz.
The goal of this study is to describe and compare the initial stages of the post-marsupial development of Hyalella pleoacuta González, Bond-Buckup &amp;amp; Araujo, 2006, prior to the development of sexual dimorphism. Ovigerous females were collected in São José dos Ausentes, RS, Brazil and kept in laboratory. Juveniles were kept separately after emerging from the marsupium and were monitored daily for the presence of exuvia. Individuals from post-marsupial stages (S) 1 to 4 were dissected and illustrated. Cuticular structures were observed through SEM. Twenty three types of setae, one type of setule, two types of pores, two types of denticles and one type of penicilium were found. Cuticular structures undergo modification through development in the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cuticular structures; Juveniles; Morphology.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702009000300003

Apparent digestibility coefficient of chickpea, maize, high-quality protein maize, and beans diets in juvenile and adult Nile tilapia ( Oreochromis niloticus )
Provedor de dados: 96
Autores: Montoya-Mejía,Magnolia; Hernández-Llamas,Alfredo; García-Ulloa,Manuel; Nolasco-Soria,Héctor; Gutierrez-Dorado,Roberto; Rodríguez-González,Hervey.
ABSTRACT The objective of our study was to assess the apparent digestibility of plant ingredients in diets for juvenile (50 g) and adult (220 g) Nile tilapia (Oreochromis niloticus). Dietary dry matter and protein apparent digestibility coefficients of four plant-derived feedstuffs (chickpea, maize, high-quality maize protein, and beans) were tested. The beans diet had the lowest apparent digestibility coefficient of dry matter (ADCDM) (69.41%), while no significant differences were detected in ADCDM among the other diets; ADCDM was significantly higher in adults compared with juveniles (77.02 vs. 73.76%). Apparent dry matter digestibility coefficient of ingredients (ADCI) was significantly higher in the chickpea (70.48%) and high-quality protein maize...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adults; Feedstuffs; In vivo digestibility; Juveniles; Plant ingredients.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000800427

Preliminary observations of cadmium and copper effects on juveniles of the polychaete Capitella sp. Y (Annelida: Polychaeta) from Estero del Yugo, Mazatlán, México
Provedor de dados: 97
Autores: MÉNDEZ,NURIA; GREEN-RUIZ,CARLOS.
The effects of cadmium (Cd) and copper (Cu) on cultured juveniles of Capitella sp. Y were investigated. Seven-day old juveniles were exposed to 13 (control), 60, 160, 240 and 340 mg Cd L-1 and 17 (control), 50, 120 and 150 mg Cu L-1 for 30 days. Mortality significantly increased with increasing Cu concentrations, but in Cd exposures, it was only evident at 340 mg L-1. Body size and faecal pellet production were reduced earlier in juveniles exposed to Cu than those exposed to Cd, especially in the higher Cu concentrations. These facts indicate that juveniles are more sensitive to Cu in terms of mortality, feeding and growth. Haemoglobin production was inhibited due to the scarcity of food in the experimental sediment rather than to metal exposure. Tube...
Tipo: Journal article
Palavras-chave: Bioassays; Marine worms; Mortality; Juveniles; Heavy metals.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000400009

Effect of flooding on survival and initial growth of Ocotea pulchella (Nees) Mez. seedlings in semi-controlled light conditions
Provedor de dados: 39
Autores: Pires,Luciana Andrea; Cardoso,Victor José Mendes.
Taking into account the occurrence of Ocotea pulchella in areas subjected to periodic flooding, this work aimed to evaluate the survival and initial development of Ocotea pulchella seedlings (2 months old) and juveniles (9 months old) in response to waterlogging under different light regimes by varying both light quantity and light quality, in order to test for possible flood tolerance of the species as affected by light conditions. Three levels of soil moisture (field capacity, mean flooding - only for seedlings - and full flooding) and four light treatments (full sun, neutral shade, far red enriched shading and neutral plus far red) were tested. The survival of seedlings and juveniles during one year was relatively high, whereas growth was negatively...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Restinga forest; Juveniles; Waterlogging; Development.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062011000200019

Effect of simulated acid rain on the survival, mortality, behaviour and morphology of African mud catfish Clarias gariepinus (Burchell, 1822)
Provedor de dados: 2
Autores: Mustapha, Moshood; Mohammed, Zainab Olayide.
This study simulated acidic habitat for different life stages of Clarias gariepinus to know the effect on survival, mortality, morphology and behaviour. The fish were exposed to pHs 3, 4, 5, 6 and 8.01 (control) for 35 days. 100% mortality was recorded for all the life stages in pH 3, and 80, 62 and 36% of mortality of fingerlings, juveniles and adults respectively were recorded in pH 4. In pH 5, 30, 26 and 12% mortalities of fingerlings, juveniles and adults respectively were recorded and at pH 6 mortalities of fingerlings, juveniles and adults were 12, 10 and 4% respectively. Control pH mortalities were 10, 6 and 2% for fingerlings, juveniles and adults respectively. Mortality was due to lack of oxygen uptake, stress and circulatory collapse. All these...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fingerlings; Juveniles; Adults; PH; Stress; Sulphur oxides.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/36900

Tempo de indução e de recuperação de dourados Salminus brasiliensis (Cuvier, 1816), submetidos a diferentes concentrações de óleo de cravo Eugenia sp. - DOI: 10.4025/actascibiolsci.v30i3.485
Provedor de dados: 3
Autores: Hisano, Hamilton; EMBRAPA Dourados; Ishikawa, Márcia Mayumi; EMBRAPA - Dourados; Ferreira, Rosana de Ávila; EMBRAPA - Dourados; Bulgarelli, André Luiz Azambuja; Costa, Thiago Raphael; Centro Universitário da Grande Dourados - Dourados; Pádua, Santiago Benites de; Faculdade Dourados - Dourados.
O presente estudo avaliou o óleo de cravo como anestésico para juvenis de dourado em cinco diferentes concentrações (20, 30, 40, 50 e 60 mg L-&amp;sup1;), utilizando como critério para determinação da concentração ideal os tempos de indução e de recuperação ao efeito do anestésico. Em relação aos tempos de indução, verificou-se diferença significativa (p &lt; 0,05) entre as concentrações de 20, 30, 40 e 60 mg L-&amp;sup1; de óleo de cravo. No entanto, a concentração de 50 mg L-&amp;sup1; não diferiu estatisticamente dos níveis de 40 e 60 mg L-&amp;sup1;. Quanto à recuperação, o menor tempo foi verificado para a concentração de 20 mg L-&amp;sup1;. O óleo de cravo é eficiente e seguro como anestésico para juvenis de dourado, quando utilizado entre 40 a 60 mg...
Palavras-chave: 2.00.00.00-6    Ciências Biológicas eugenol; Espécie nativa; Juvenis; Salminus brasiliensis. eugenol; Native species; Juveniles; Salminus brasiliensis.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/485

Reproductive performance of the Mesa silverside (Chirostoma jordani Woolman, 1894) under natural and controlled photoperiods
Provedor de dados: 47
Autores: Arredondo-Figueroa,José Luis; Núñez-García,Laura Georgina; Heredia-Guzmán,Paloma Adriana; Ponce-Palafox,Jesús T.
Chirostoma jordani is a native annual species inhabiting lacustrine waters of the Central Mexico Plateau. It is widely distributed and is currently facing high environmental pressures. Five experiments were performed to study the reproductive performance of this species. Four of the experiments were conducted in 270-L indoor recirculation tanks. Two males and one female at the first stage of reproduction were included in each test. A photoperiod of 14 light hours and 10 dark hours was used. In a fifth experiment, 10 females and 15 males were kept in an outdoor 3,000-L recirculation tank under natural photoperiod. The number of spawns, fertilised eggs and 30-day-old juveniles were counted and the survival rate was calculated. The results indicated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Breeding; Atherinopsidae; Eggs; Juveniles; Survival rate.
Ano: 2012
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452012000300002

POSTLARVAS Y JUVENILES DE CAMARONES FARFANTEPENAEUS SPP Y XIPHOPENAEUS KROYERI EN LA BOCA DE LA BARRA (CIÉNAGA GRANDE DE SANTA MARTA), CARIBE COLOMBIANO
Provedor de dados: 50
Autores: López,Ángela C.; Criales,María M.; García,Camilo B.
Postlarvas y juveniles de los camarones Farfantepenaeus spp. y Xiphopenaeus kroyeri se colectaron en la Boca de la Barra (Ciénaga Grande de Santa Marta), mediante redes de canal fijas que se orientan con la marea. Se realizaron muestreos quincenales nocturnos durante un año (febrero 1998 - febrero 1999), correspondiendo a los períodos de luna nueva y luna llena, intercaladamente. Para Farfantepenaeus spp. se observó que las postlarvas tienden a presentarse durante la época seca del año y preferiblemente en la fase de luna llena, siendo la diferencia entre fases lunares estadísticamente significativa (test de Mann-Whitney, P&lt;0.05). Los juveniles presentaron un comportamiento opuesto: hubo diferencias significativas (test de Mann-Whitney, P&lt; 0.05)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Postlarvas; Juveniles; Distribución temporal.
Ano: 2001
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612001000100009

VARIACIÓN ESPACIAL Y TEMPORAL DE JUVENILES DE PINCTADA IMBRICATA (RÖDING, 1798) Y ARGOPECTEN NUCLEUS (BORN, 1778) EN LA REGIÓN NORTE DEL CARIBE COLOMBIANO
Provedor de dados: 50
Autores: Castellanos,Claudia; Campos,Néstor H.
Con el propósito de conocer la respuesta de juveniles de bivalvos frente a los cambios en la condición hidrográfica, fue evaluada la variación espacial (regiones, bahías y profundidades) y temporal (períodos climáticos) de la abundancia de Pinctada imbricata y Argopecten nucleus en la región norte del Caribe colombiano. Esta variación fue determinada en dos fases, a partir de la fijación de los individuos en colectores artificiales. La primera fase, entre 1994 y 1996 fue realizada en el Parque Nacional Natural Tayrona (PNNT) donde se comparó la abundancia de juveniles en Bahía Concha y Bahía Chengue a 5, 10, 15 y 20 m de profundidad; fueron establecidas diferencias entre los factores considerados; la mayor abundancia promedio a 5 m para Pinctada imbricata...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abundancia; Juveniles; Bivalvos; Caribe colombiano.
Ano: 2007
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612007000100010

COMPOSICIÓN Y DENSIDAD DE CORALES JUVENILES EN DOS ARRECIFES PROFUNDOS DE SAN ANDRÉS ISLA, CARIBE COLOMBIANO
Provedor de dados: 50
Autores: Vidal,Andrés M; Villamil,Claudia M; Acosta,Alberto.
El reclutamiento de corales en un arrecife determina el mantenimiento, la renovación y la estructura futura de las comunidades coralinas. Con el objeto de conocer la composición, densidad y el valor de importancia de corales juveniles escleractínios (&lt; 2 o &lt; 4 cm de diámetro; según la especie) se muestrearon dos localidades (Reggae Nest y El Faro) en la terraza profunda de sotavento, a 20 m de profundidad, en la isla de San Andrés. Así mismo, se cuantificó la frecuencia de mortalidad parcial, total, enfermedades y signos de depredación en los juveniles, en 47 cuadrantes de 1m², distribuidos a lo largo de una cuerda guía. Se registró un total de 397 juveniles coralinos pertenecientes a 16 especies. La densidad promedio y riqueza de juveniles no...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Corales escleractínios; Juveniles; Composición; Densidad; San Andrés.
Ano: 2005
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612005000100010