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Registros recuperados: 113
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Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997 OceanDocs
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
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Validation of daily increment deposition in otoliths of the pejerrey (Odontesthes bonariensis) larvae OceanDocs
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
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Identificación de larvas y juveniles de Patagonotothen ramsayi y Patagonotothen tessellata (Pisces, Nototheniidae) OceanDocs
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
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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 OceanDocs
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
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Inventario de larvas de especies registradas para el Caribe colombiano. OceanDocs
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
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Variación de la población del ictioplancton en el Pacífico Sur Oriental durante diciembre de 1997 OceanDocs
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
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Variaciones estacionales en el crecimiento de larvas de anchoita (Engraulis anchoita). OceanDocs
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<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
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Preliminary results on the nutritional evaluation of omega-3-HUFA-enriched <i>Artemia</i> nauplii for larvae of the sea bass, <i>Dicentrarchus labrax</i> OMA
Van Ballaer, E.; Amat, F.; Hontoria, F.; Léger, P.; Sorgeloos, P..
Freshly hatched San Pablo Bay and Great Salt Lake <i>Artemia</i> nauplii (omega-3-HUFA-poor) and enriched meta-nauplii (omega-3-HUFA-enriched)were compared to reference <i>Artemia</i> nauplii (omega-3-HUFA-rich) as a food source for the larvae of the sea bass, <i>Dicentrarchus labrax</i>. 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 <i>Artemia</i> is suspected to be caused by a high level of alpha-BHC in this <i>Artemia</i> 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
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Development of a lipid-enrichment technique for <i>Artemia</i> juveniles produced in an intensive system for use in marine larviculture OMA
Dhont, J.; Lavens, P.; Sorgeloos, P..
Although there exists an obvious inclination to replace live larval food by formulated feeds, <i>Artemia nauplii</i> are still essential in the larviculture of marine fish species. So far, on-grown <i>Artemia</i> are rarely used in larviculture although they offer several advantages over <i>Artemia nauplii</i>: 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 <i>Artemia</i> 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
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Effect of dietary essential fatty acids on egg quality and larviculture success of the greasy grouper (<i>Epinephelus tauvina</i> F.): preliminary results OMA
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 (<i>Epinephelus tauvina</i>) 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
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Rearing techniques for difficult marine fish larvae OMA
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
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Three simple culture devices for aquatic invertebrates and fish larvae with continuous recirculation of the medium OMA
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 <i>Artemia salina</i> 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
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Search for beneficial bacterial strains for turbot (<i>Scophthalmus maximus</i> L.) larviculture OMA
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<sup>2</sup> CFU larva<sup>-1</sup> just before first feeding at day 3 post hatch to 10<sup>5</sup> CFU larva<sup>-1</sup> 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
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An oral challenge for turbot larvae with <i>Vibrio anguillarum</i> OMA
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 (<i>Scophthalmus maximus</i>) larvae with a pathogenic <i>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
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A new artificial diet for the early weaning of seabass (<i>Dicentrarchus labrax</i>) larvae OMA
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 (<i>Dicentrarchus labrax</i>) 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
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The effect of supplemental ascorbic acid in enriched live food for <i>Clarias gariepinus</i> larvae at startfeeding OMA
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 (<i>Clarius gariepinus</i>) larvae has been assessed in two 10-day culture trials. Three treatments received only <i>Artemia</i> nauplii enriched with an experimental emulsion containing 0, 10 or 20% ascorbyl palmitate (AP) and yielding 530, 1200 and 1600 µg AA g<sup>-1</sup> DW <i>Artemia</i> , respectively; the other three treatments were fed the same <i>Artemia</i> 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
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Cofeeding of phospholipids to turbot <i>Scophthalmus maximus</i> L. larvae as a tool to reduce live food consumption OMA
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 <i>Artemia</i> , to first-feeding turbot larvae were investigated. Five dietary regimes were used: control ( <i>Artemia</i> 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 <i>Artemia</i> 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
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Live-food mediated drug delivery as a tool for disease treatment in larviculture: 2. A case study with European seabass OMA
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 <i>Artemia</i>. 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
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Review on the dietary effects of phospholipids in fish and crustacean larviculture OMA
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
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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 Rev. Bras. Zool.
Baggio,Rafael A.; Moretti,Caroline B.; Bialetzki,Andréa; Boeger,Walter A..
ABSTRACT The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix & Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann & 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
Registros recuperados: 113
Primeira ... 123456 ... Última
 

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