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| Registros recuperados: 12 | |
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| Otémé, Ziriga Josué. |
| L'évolution saisonnière du développement des gonades chez les femelles de Chrysichthys nigrodigitatus en lagune Ebrié (Côte d'Ivoire) a été étudiée sur un cycle annuel de reproduction. Sept stades macroscopiques de maturation des gonades ont été identifiés. Ces poissons ne pondent qu'une seule fois durant une saison de reproduction qui s'étend de juillet à novembre. La fécondité potentielle varie entre 4878 et 87724 ovocytes et 5438 et 36257 ovocytes respectivement pour le milieu naturel et le milieu d'élevage. La corrélation entre la fécondité et la longueur du poisson est légèrement plus marquée que celle entre la fécondité et et le poids des gonades |
| Tipo: Journal Contribution |
Palavras-chave: Reproductive cycle; Pond culture. |
| Ano: 1993 |
URL: http://hdl.handle.net/1834/5519 |
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| Jacq, E; Moal, Jeanne; Samain, Jean-francois; Corre, S; Daniel, J; Nicolas, Jean-louis; Cochard, Jean-claude; Fera, P. |
| Larval rearings were performed with seawater either freshly pumped or after storage in a pond. Concerning bacterial populations these waters were characterized by a high diversity, little sized bacteria whose few of them (1%) were cultivable on Zobell medium. In the tanks, the bacterial ecosystem was modified by the presence of antibiotics, larvae and algae: the diversity was lowered, the cellular volume was increased by a factor 2 to 5, 100% bacteria were cultivable and chloramphenicol resistant, and their metabolism changed. Taxonomic screening showed no differences among the two waters neither at the beginning nor at the end of the rearings. However, depending on the water (stored or not) differences were identified for bacterial physiology and... |
| Tipo: Text |
Palavras-chave: Marine aquaculture; Pond culture; Scallop culture; Ecology; Antibiotics; Organic matter; Grazing; Carbohydrates; Mathematical models; Modelling; Growth; Bacterial diseases; Biological production; Culture tanks; Larvae; Rearing. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-914.pdf |
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| Bell, J; Agudo, N; Purcell, S; Blazer, P; Simutoga, M; Pham, Dominique; Della Patrona, Luc. |
| We examined the potential for producing the large numbers of sandfish (Holothuria scabra) needed for restocking programmes by co-culturing juveniles with the shrimp Litopenaeus stylirostris in earthen ponds. Our experiments in hapas within shrimp ponds were designed to detect any deleterious effects of sandfish on shrimp, and vice versa. These experiments showed that a high stocking density of juvenile sandfish had no significant effects on growth and survival of shrimp. However, survival and growth of sandfish reared with shrimp for 3 weeks were significantly lower than for sandfish reared alone. Increased stocking density of shrimp also had a significant negative effect on survival and/or growth of sandfish. A grow-out trial of juvenile sandfish in... |
| Tipo: Text |
Palavras-chave: Shrimp; Sea cucumbers; Sandfish; Pond culture; Predation; Co culture. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3590.pdf |
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| Baert, P.; Anh, N.T.N.; Quynh, V.D.; Hoa, N.V.; Sorgeloos, P.. |
| In this study, one-cycle and multi-cycle culture systems for <i>Artemia</i> in seasonal salt ponds are compared. In one-cycle systems, <i>Artemia</i> is inoculated only once per season, while in multi-cycle systems ponds are drained and re-stocked several times per season. In Vietnam, three-cycle systems gave significantly higher cyst yields than did the one-cycle system. However, after two cycles, systems were not significantly different. Food limitation probably caused the steady decline in cyst yields, as observed in the one-cycle ponds. In these ponds, females have smaller broods (from the second cycle onwards) and during the last cycle the number of adult females is lower than in multi-cycle ponds. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cysts; Pond culture; Artemia. |
| Ano: 1997 |
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2921 |
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| Bodoy, A; Geiaron, P; Garnier, Jacqueline; Heurtebise, S. |
| Two different biomasses (100 g multiplied by m super(-2) and 1 kg multiplied by m super(-2)) of oysters were put in identical sea-water ponds, thus leading to different trophic conditions, corresponding to rearing techniques. Changes in growth, biochemical composition and sexual maturation were recorded for two age groups. The first one included 9 month-old oysters and the second one 21 month-old oysters, at the beginning of the experiment. For both age groups, significant differences were observed in growth and biochemical composition. Lipids were accumulated faster for the lower biomass. However, the only difference concerning glycogen was observed on the older oysters. They showed a peak at the lowest biomass and a decrease at the larger biomass. Sexual... |
| Tipo: Text |
Palavras-chave: Crassostrea gigas; Bivalvia; Sea water; Oyster culture; Glycogen; Age; Chemical composition; Lipids; Biochemistry; Sexual maturity; Rearing; Pond culture; Biomass; Growth; Density. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-916.pdf |
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| Maestrini, S; Robert, J. |
| Microalgal population of oyster ponds is dominated by several tychobenthic diatoms which provide a very good food to grow oysters. The mechanisms which allow them to dominate have been put under research. H.P.L.C. analysis demonstrated 17 amino acids amounted 10-17% of total DON, i.e. 0.6-11.5 mu g-at/l nitrogen. Serin and glycin were the most abundant. None of the substances was related to the presence of oyster. Glutamic acid, alanin and ornithin concentrations showed the greatest variations; they are suspected to play the major role as nutrient source. Screening of nutritional capabilities of ten local isolates of micro-algae to use 42 organic substances as sole source of nitrogen, demonstrated urea, glutamic acid and hypoxanthin are assimilated by all... |
| Tipo: Text |
Palavras-chave: Bacillariophyceae; Bivalvia; Biomass; Pond culture; Algal settlements; Oyster culture; Nutritive value; Dissolved organic nitrogen. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-1531.pdf |
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| Registros recuperados: 12 | |
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