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Registros recuperados: 14
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Abundance and Reproductive Biology of the Penaeid Prawns of Bagamoyo Coastal Waters, Tanzania OceanDocs
Mgaya, Y.D.; Teikwa, E.D..
The coastal waters of Bagamoyo in Tanzania constitute an important penaeid prawn trawling ground. Despite the high economic value attached to this resource, the biological information necessary for its sustainable exploitation is scanty and fragmented. The present study was therefore designed to investigate the species composition, population abundance and reproduction of the penaeid prawns in Bagamoyo coastal and nearshore waters. Samples were obtained monthly for a period of one year from inshore waters adjacent to the Ruvu Estuary while additional samples were bought at the beach from artisanal fishermen. In the laboratory, samples were identified to the species level. Four penaeid species, Fenneropenaeus indicus (formerly known as Penaeus indicus...
Tipo: Journal Contribution Palavras-chave: Prawn culture.
Ano: 2003 URL: http://hdl.handle.net/1834/960
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Alternativas para obtener alimentos más eficientes en el engorde semintensivo del camarón blanco (Litopenaeus Schmitti) OceanDocs
Alvarez, S.; Garcia, T.; Villareal, H.; Galindo, J.; Fraga, I.; Pelegrín, E..
Se desarrollaron cuatro diseños experimentales completamente aleatorizados. El primero se realizó a escala de laboratorio, en cajas plásticas de 40L de capacidad y 10 juveniles/caja, para evaluar la respuesta de los camarones ante la sustitución parcial y total de la harina de pescado por soya en la dieta, teniendo como control la fórmula empleada en el engorde a escala comercial.
Tipo: Proceedings Paper Palavras-chave: Prawn culture; Diets; Animal growth.
Ano: 2004 URL: http://hdl.handle.net/1834/1881
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Analyse des performances économiques de la flottille de la pêche à la crevette royale "Penaeus kerathurus" dans le golfe de gabès. OceanDocs
Ben Arfa, Y.; Ben Salem, S..
L’objectif de cette étude est l’analyse comparative des performances économiques de la flottille de pêche à la crevette royale Penaeus Kerathurus en se basant sur les indicateurs suivants : le chiffre d’affaires, le capital investi, les profits brut et net, le taux de rentabilité qui se présente selon deux scénarios et la valeur ajoutée générée par cette flottille. Les résultats obtenus ont montré un profit brut positif pour toutes les catégories de la flottille. En intégrant l’amortissement, plusieurs variations ont été notées notamment pour les groupes des chalutiers benthiques.
Tipo: Journal Contribution Palavras-chave: Fishing fleet; Prawn culture; Fishery economics.
Ano: 2010 URL: http://hdl.handle.net/1834/4700
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Aquaculture of edible species in French Polynesia ArchiMer
Patrois, Jacques.
In French Polynesia, the research on rearing edible species has began in 1971. The aims were: to develop the local production of sea foods to satisfy the domestic market and to create new activities and employments in rural areas.
Tipo: Text Palavras-chave: Penaeus stylirostris; Penaeus indicus; Penaeus monodon; Macrobrachium rosenbergii; Perna viridis; Crassostrea rhizophorae; Saccostrea echinata; Mollusca; Prawn culture; Shrimp culture; Rearing; Marine fish; Marine molluscs; Marine crustaceans; Freshwater crustaceans; Aquaculture.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/acte-1450.pdf
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Etude de la composition biochimique de la chair et des co-produits de la crevette royale "Penaeus kerathurus" du nord et sud de la Tunisie OceanDocs
Limam, Z.; Sadok, S.; El Abed, O..
La comparaison de la composition biochimique de la chair et des déchets (têtes, queues et carapaces) de Penaeus kerathurus du nord et sud de la Tunisie a été réalisée (protéines totales, lipides totaux, matière sèche, composition en acides gras, azote basique volatil total (ABVT) et acides aminés totaux libres (AATL)). La matière sèche a varié entre 23,77 et 26,06%. Pour tous les échantillons les taux d’ABVT sont restés inférieurs aux seuils limites (20 mg /100g). Les teneurs en acides aminés totaux libres et des lipides des co-produits chez les deux lots de Penaeus kerathurus sont supérieures à celles de la partie consommable. Les acides gras polyinsaturés (AGPI) constituent la partie majeure des acides gras totaux des tissus et co-produits de Penaeus...
Tipo: Journal Contribution Palavras-chave: Prawn culture; Biochemical composition.
Ano: 2010 URL: http://hdl.handle.net/1834/4702
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HUFA levels in eggs of wild and cultured broodstock of <i>Macrobrachium rosenbergii</i> OMA
Lavens, P.; Piyatiratitivorakul, S.; Menasveta, P.; Sorgeloos, P..
The variation in egg quality, i.e. the potential of the egg to produce viable fry, is still a limiting factor in the commercial production of marine fish and crustacean fry. Better knowledge in this field would contribute to improved and especially more consistent hatchery outputs and to the development of more suitable broodstock diets. So far, objective criteria to evaluate egg quality are scarce. However, it is very likely that the nutrient composition of the eggs may be a good indicator for egg viability as it reflects the nutrient demands of the developing embryo and larva. Since (n-3) highly unsaturated fatty acids (HUFAs) have been identified as essential nutrients for the larvae of marine fish, shrimp and prawn a case study has been initiated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical composition; Brood stocks; Comparative studies; Eggs; Fatty acids; Prawn culture; Shrimp culture; Macrobrachium rosenbergii.
Ano: 1991 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=2876
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Maturation performance, offspring quality and lipid composition of <i>Macrobrachium rosenbergii</i> females fed increasing levels of dietary phospholipids OMA
Cavalli, R.O.; Menschaert, G.; Lavens, P.; Sorgeloos, P..
The effects of increasing levels of dietary phospholipids (PL) on the reproductive performance, egg and larval quality, and lipid composition of females of the freshwater prawn <i>Macrobrachium rosenbergii</i> were investigated. Three isolipidic diets containing similar amounts of highly unsaturated fatty acids but varying levels of PL (0.8, 2.4 and 4.6%) were fed during 180 days to three groups of eight females originating from Thai ponds. No significant differences were observed for fecundity, egg size and hatchability, starved larvae size, and size, survival and tolerance to stress of 8 day-old larvae. Similarly, no major differences in the lipid composition of the midgut gland, ovaries and muscle tissue of females could be detected. Results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Animal nutrition; Brood stocks; Complex lipids; Diets; Eggs; Feed composition; Feeding experiments; Females; Prawn culture; Sexual maturity; Sexual reproduction; Macrobrachium rosenbergii; Thailand.
Ano: 2000 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3347
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Performance of <i>Macrobrachium rosenbergii</i> broodstock fed diets with different fatty acid composition OMA
Cavalli, R.O.; Lavens, P.; Sorgeloos, P..
The effect of linoleic acid (18:2n-6) and n-3 highly unsaturated fatty acids (HUFA) on the reproductive performance and offspring quality of the freshwater prawn <i>Macrobrachium rosenbergii</i> was evaluated in a 180-day trial. Three isonitrogenous and isolipidic diets containing different levels of fatty acids, high 18:2n-6 and n-3 HUFA concentrations, high 18:2n-6 and low n-3 HUFA, and low 18:2n-6 and n-3 HUFA, were fed ad libitum to three groups of six females. Fecundity was improved by the addition of higher amounts of 18:2n-6 (from 3 to 13 mg g<sup>-1</sup> DW). As a consequence of higher fecundity, smaller eggs were obtained most likely because the number of oocytes competing for a limited amount of yolk was higher. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brood stocks; Fecundity; Feeding experiments; Polyunsaturated fatty acids; Prawn culture; Macrobrachium rosenbergii.
Ano: 1999 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=4006
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Presence of Palaemon Macrodactylus Rathbun 1902 (Crustacea: Decapoda: Caridea: Palaemonidae) in Mar del Plata harbor, Argentina: first record from Southwestern Atlantic Waters OceanDocs
Boschi, E.E.; Spivak, E.; Martorelli, S.R..
Adults of the palaemonid prawn Palaemon macrodactylus Rathbun, 1902 were reported for the first time from the southwestern Atlantic waters. Males and ovigerous females were collected in Mar del Plata harbor (38 degree 03' S; 57 degree 31' W), Argentina; larvae obtained from one of the collected females were reared in the laboratory until the juvenile stage. The geographical range of P. macrodactylus was previously restricted to the Pacific Ocean: it was originally described in Japan and has been reported as an invasive species in the western coast of USA in the 1950's and in Australia in the 1970's. Recently, this prawn has been also reported from European waters.
Tipo: Journal Contribution Palavras-chave: Introduced species; Prawn culture.
Ano: 2006 URL: http://hdl.handle.net/1834/1573
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Reproductive performance of <i>Macrobrachium rosenbergii</i> females in captivity OMA
Cavalli, R.O.; Lavens, P.; Sorgeloos, P..
The breeding frequency, fecundity, egg hatchability, larval output and viability of pond-reared, mature <i>Macrobrachium rosenbergii</i> females were individually followed up during 180 d. Sexually mature prawns were maintained under controlled laboratory conditions (28.7 C and 12-h light/d) in a 190-L freshwater recirculation system and fed a formulated diet. Ovarian development, moulting and spawning events were checked daily. At least six consecutive moults were recorded for each of the 18 females. The duration of the intermoult period averaged 27.5 d and was not affected by ovarian development or spawning, but intermoult periods followed by spawning had significantly lower growth rates. From a total of 126 moulting events recorded, egg...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fecundity; Moulting; Prawn culture; Rearing; Recirculating systems; Reproductive cycle; Macrobrachium rosenbergii.
Ano: 2001 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=8494
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Requerimientos nutricionales de juveniles de camarón blanco (Litopenaeus schmitti): evaluación de dietas prácticas OceanDocs
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
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Status of prawn pond at Kwetu Training Centre OceanDocs
Tipo: Report Palavras-chave: Prawn culture.
Ano: 2001 URL: http://hdl.handle.net/1834/904
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Variabilite genetique de quelques especes de crevettes Peneides d'interet aquacole ArchiMer
Ko, G; Pasteur, N; Bonhomme, Francois; Liao, D.
Thirteen populations belonging to seven species of Penaeid prawns (Crustacea, Decapoda) were analyzed at 29 protein loci. The authors show that both inter and intrapopulational genetic diversity are very low. These results are discussed in view of their use as guidance for aquaculture programs.
Tipo: Text Palavras-chave: Penaeus kerathurus; Penaeus orientalis; Penaeus indicus; Penaeus monodon; Penaeus stylirostris; Penaeus japonicus; Penaeidae; Malacostraca; Prawn culture; Aquaculture development; Sexual reproduction; Biopolymorphism; Population genetics; Polymorphisme enzymatique; Variabilité génétique; Crevettes Pénaeides; Crustacés.
Ano: 1983 URL: http://archimer.ifremer.fr/doc/1983/acte-1186.pdf
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Variations in lipid classes and fatty acid content in tissues of wild <i>Macrobrachium rosenbergii</i> (de Man) females during maturation OMA
Cavalli, R.O.; Tamtin, M.; Lavens, P.; Sorgeloos, P..
This study describes the variations in total lipid, lipid classes and fatty acids in the midgut gland (MG), ovary, and muscle tissue of wild-caught <i>Macrobrachium rosenbergii</i> to elucidate the importance of these components during sexual maturation. Mature females were captured in the Mae Klong River, Thailand, from July to September 1998, and divided into five groups according to their ovarian development. Total lipid levels in the ovary increased with maturation, but no concomitant decrease in MG lipids was observed. Thus, the lipid requirements of the developing ovary are thought to be more dependent on the immediate ingestion of dietary lipid than on MG reserves. Higher proportions of neutral lipids (NL), mainly triacylglycerols (TG),...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biochemical composition; Fatty acids; Lipids; Muscles; Natural populations; Ovaries; Polyunsaturated fatty acids; Prawn culture; Sexual maturity; Macrobrachium rosenbergii; Thailand.
Ano: 2001 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=6923
Registros recuperados: 14
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