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Registros recuperados: 11
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A spatiotemporal study of bacterial community profiles associated with Atlantic bluefin tuna larvae, Thunnus thynnus L., in three Mediterranean hatcheries ArchiMer
Gatesoupe, Joel; Coves, Denis; Ortega, Aurelio; Papandroulakis, Nikos; Vadstein, Olav; De La Gandara, Fernando.
During the first 2 years of larval rearing trials with Atlantic bluefin tuna, survival was a challenging issue. As bacterial colonization of the gut has been shown to play a key role for other species, we studied the profiles of the microbiota associated with individual larvae at different stages in three distant hatcheries. The Bacterial Community Profile (BCP) was quantified based on PCR-DGGE analyses of partial amplicons from 16S rDNA. Considerable individual variability in BCP was observed before onset of feeding, and the BCP did not show regular fluctuation during ontogenesis. Microalgae were added to the rearing tanks in two of the three hatcheries, but it was not possible to distinguish the effect of location from the effect of algal addition on...
Tipo: Text Palavras-chave: Larval rearing; Bacterial diversity; DGGE; Thunnus thynnus.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00075/18648/16197.pdf
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Conditionnement artificiel de l'huître Crassostrea gigas ArchiMer
Jorge Eduardo, Chávez Villalba.
In France, 90% of the annual cup oyster (Crassostrea gigas) production comes from larvae caught in the Arcachon and Marennes-Oléron basins. However, the spat catch shows many interannual irregularities and oyster farmers increasingly say they need spat outside of the reproductive period. Thus, the role of hatcheries in Japanese oyster spat production in France is becoming increasingly evident. However, the current state of knowledge about cup oyster reproduction in controlled conditions is limited, and hatchery professionals must confront various problems to optimise treatment of genitors so as to obtain larval breeds in good health and a lengthening of the reproductive season. To respond to this, we have carried out a study on three aspects that seem...
Tipo: Text Palavras-chave: Water temperature; Biochemical studies; Gametogenesis; Breeder conditioning; Larval rearing.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/these-1456.pdf
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Duration of the pre-settlement period of the mangrove crab Ucides cordatus (Decapoda: Ocypodidae) under laboratory conditions BABT
Ventura,Robson; Silva,Ubiratã de Assis Teixeira da; Perbiche-Neves,Gilmar; Ostrensky,Antonio; Boeger,Walter Antonio Pereira; Pie,Marcio Roberto.
The goal of the present study was to determine the most appropriate time to release the immatures of Ucides cordatus (Linnaeus) produced in the laboratory into the natural environments. Specifically, the time when the megalopae sought the mangrove sediment to excavate the burrows was determined, as well as the time necessary for their metamorphosis into the first juvenile stage. Results indicated that the megalopae of U. cordatus reared in the laboratory took three to ten days (median = 6) after their molt to excavated burrows in the sediment. The average time for the megalopae to molt into juveniles was 12.6 days (SD = 2.3).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ucides cordatus; Restocking; Larval rearing; Settlement; Megalopae; Juvenile.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000500012
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Effect of diet composition on the development of the floodwater Mosquito Ochlerotatus (Ochletotatus) albifasciatus (Macquart) (Diptera: Culicidae) Neotropical Entomology
Sy,Victoria E.; Campos,Raúl E..
One important step for the colonization of Ochlerotatus albifasciatus (Macquart) is to determine the optimal conditions for larval rearing, which makes possible the development of experiments comprising larval rearing in the laboratory. In this research the effect of diet composition on the development of O.albifasciatus was studied. For this purpose, cohorts of 20 first instars were reared using five diets: 1:1 mix of yeast and TetraMin®, 1:1 mix of fine and coarse organic matter, grass cuts soaked in water for 1h or 24h before larvae incorporation, and 1:1:1 mix of grass cuts, fine organic matter and coarse organic matter. Survival was recorded for each cohort, while development time from first instar to pupa, and adult wing length were recorded for each...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Survival; Development time; Wing length; Food; Larval rearing.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000600016
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Evaluation de l'effet de l'environnement et de l'alimentation sur l'apparition d'anomalies de développement chez l'alevin de bar (Dicentrarchus labrax) ArchiMer
Menu, Bruno; Robin, Jh; Gouillou-coustans, Marie-francoise.
Larvae from a natural spawn of sea bass were distributed into 3 larval rearing lines in 2 distant sites, after simulated or true transportation. The specific rearing methods in the specific rearing environment of each laboratory were used :starvation under darkness for 160 degrees days and first feeding on Artemia (PP) in the Mediterranean laboratory of Palavas;first feeding on rotifers at 75 degrees days in the laboratory of Brest (Brittany) in 250 liters (BB) tanks or 35 liters tanks (Bb) of a separate rearing line. In the 250 liters tanks in Brest, 2 additional treatments before first feeding on Artemia were tested :starvation up to 160 degrees days under darkness with no bubbling (BP);starvation up to 160 degrees days under continuous illumination with...
Tipo: Text Palavras-chave: Pisciculture; Élevage larvaire; Malformations; Effets de l'environnement; Alimentation; Fish culture; Larval rearing; Abnormalities; Environmental effects; Diet.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00272/38284/36472.pdf
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Hatchery-scale trials using cryopreserved spermatozoa of black-lip pearl oyster, Pinctada margaritifera ArchiMer
Hui, Belinda; Vonau, Vincent; Moriceau, Jacques; Tetumu, Roger; Vanaa, Vincent; Demoy-schneider, Marina; Suquet, Marc; Le Moullac, Gilles.
Cryopreservation is a valuable tool for genetic improvement programs. Several bivalve mollusc species have already been the subject of such programs and the Tahitian black pearl oyster industry is now planning the development of selective breeding for desirable traits in Pinctada margaritifera. The ability to cryopreserve spermatozoa would, therefore, offer significant benefits to the cultured black pearl industry. Spermatozoa were cryopreserved with CPA 0.7 M trehalose in 0.8 M Me2SO and a two-step freezing process was used: straws were first maintained in nitrogen vapour for 10 minutes, then directly plunged into liquid nitrogen and stored for one week before use. The viability of thawed sperm was 23 % lower than that of fresh sperm. When using thawed...
Tipo: Text Palavras-chave: Cryopreservation; Spermatozoa; Fertility; Larval rearing; Pearl oyster; Pinctada margaritifera.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00040/15098/12446.pdf
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La sensibilité des larves de pectinidés aux conditions d’élevage : le flux ouvert comme alternative aux mortalités massives ArchiMer
Holbach, Marine.
In many countries, aquaculture of pectinids depends on the success of artificial spat production in hatchery. This production is always unpredictable due to the variability of hatching rate and larval survival. Flow-through larval rearing systems were developed in Norway for the King scallop Pecten maximus and showed promising results. Unfortunately the system needs to be optimized since the larval yields and the densities used are still relatively low. In France, a small-scale (5 L) and high-density (≤ 300 larva mL-1) flow-through larval rearing system was successfully developed for oysters. First trials in such system and in similar conditions with P. maximus failed as we registered slower growth and high mortality rate in only a few days. It is known...
Tipo: Text Palavras-chave: Pectinidés; Pecten maximus; Écloserie; Élevage larvaire; Flux ouvert; Contamination bactérienne; Prophylaxie; Physiologie larvaire; Indices de stress.; Pectinids; Pecten maximus; Hatchery; Larval rearing; Flow-through; Bacterial contamination; Prophylaxis; Larval physiology; Stress index.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00259/37000/35491.pdf
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Optimizing sperm cryopreservation in great scallop (Pecten maximus) ArchiMer
Suquet, Marc; Malo, Florent; Gourtay, Clemence; Ratiskol, Dominique; Riobe, Marion; Le Grand, Jacqueline; Queau, Isabelle; Mingant, Christian.
A basic cryopreservation protocol for great scallop sperm was recently published, with which thawed sperm survival remained limited to 25% of control values (Suquet et al. 2014). We designed here a set of five experiments to test ways of improving thawed sperm survival and storage by studying the effects of (1) cryoprotectant concentration; (2) sugar incorporation in the extender; (3) egg yolk addition to the extender; (4) sperm dilution rate; and (5) storage capacity of thawed sperm at 4 degrees C. A sixth experiment was then performed to compare rearing performances of larvae produced using thawed sperm from the optimal protocol defined in the present study with those produced using fresh sperm. During the first experiment, a significantly higher...
Tipo: Text Palavras-chave: Pecten maximus; Mollusc; Sperm; Cryopreservation; Larval rearing.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00359/47033/46946.pdf
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Premiers essais d'élevage larvaire de l'ombrine subtropicale (red fish) Sciaenops ocellatus dans les conditions intensives en Martinique ArchiMer
Soletchnik, Patrick; Thouard, Emmanuel; Goyard, Emmanuel; Baisnee, D; Yvon, C; Baker, P.
Two batches of red drum larvae were air shipped from hatcheries in the U.S.A. and stocked in two intensive tank experiments at densities oc 7 :.nd 2-3 larvae per liter. Food items include live rotifers, copepods, brine shrimps. squid and commercial fish pellets. Growth rates were similar in both experiments up to day 20 (12-1" mm) but differences in feeding schedules and an infestation by the dinoflagelate Amyloodinium sp. affected the growth from day 20 to 43 in the second trial. Significant mortalities occurred in the tanks during the first feeding period (days 2 to 7) and again from days 17 to 20 as the result of cannibalism. Survival between day 2 and day 44 was 44% in the first trial. Abnormal inflation of the swim bladder and infection with...
Tipo: Text Palavras-chave: French West Indies; Martinique; Sciaenops ocellatus; Larval rearing.
Ano: 1988 URL: https://archimer.ifremer.fr/doc/1998/rapport-1914.pdf
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SYstème de BIOmétrie Larvaire de bivalves par analyse d'images ArchiMer
De Pontual, Helene.
SYBIOL, SYstem of BIOmetry of Larvae by image analysis, has been designed for measuring larvae of bivalves in a semi automatic way. The main interest of this tool is to provide more information with the extraction of parameters such as area or equivalent diameter. Our purposes are to describe and evaluate the system which is now operational and used in routine in the mollusc hatchery of Argenton.
Tipo: Text Palavras-chave: Croissance; Elevages larvaires; Mollusques; Analyse d'images; Growth; Larval rearing; Molluscs; Image analysis.
Ano: 1994 URL: http://archimer.ifremer.fr/doc/00451/56302/57890.pdf
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Use of polyester pad as a new physical substrate for rearing Cochliomyia hominivorax coquerel (Diptera: Calliphoridae) larvae Neotropical Entomology
Silva,Carlos E.; Moya-Borja,Gonzalo E.; Azambuja,Patricia.
Polyester pad was utilized as solid support for rearing Cochliomyia hominivorax Coquerel larvae in liquid diet and compared with the ground meat diet. There were no significant differences in the mean third instar larvae and pupal weights, number of pupae, emergence and rearing efficiency. The tests were conducted through four consecutive generations, presenting no detectable effect in any of the life history parameters. We propose that the polyester pad can be used as solid support for rearing C. hominivorax larvae in liquid diets and can be reutilized reducing the costs of mass rearing.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Screwworm; Larval rearing; Synthetic matrix; Liquid diet.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000300019
Registros recuperados: 11
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