Dourado (Salminus brasiliensis) larviculture: Weaning and ontogenetic development of digestive proteinases

Vega-Orellana, Orestes M.; Fracalossi, Débora Machado; Sugai, Juliet Kiyoko

doi:10.1016/j.aquaculture.2005.07.002

Cited by 60 publications

(43 citation statements)

References 23 publications

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“…According to Hamlin et al (2000), the presence of gastric glands indicates the beginning of chemical digestion processes. On the other hand, the results obtained by Vega-Orellana et al (2006) suggest that morphology of stomach is not necessary indicative of its functionality. The authors proved that the main structure of stomach in Salminus brasiliensis larvae was already visible on the 3 dph, while no activity of acidic protease was detected.…”

Section: Discussioncontrasting

confidence: 49%

The ontogenetic development of the digestive tract and accessory glands of sterlet (Acipenser ruthenus L.) larvae during endogenous feeding

Wegner

Ostaszewska

Rozek³

2009

Rev Fish Biol Fisheries

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The process of differentiation of digestive tract structures in the sterlet Acipenser ruthenus (L.) larvae was studied from hatching to the beginning of exogenous feeding [9 dph (day post hatching)] using histological procedures. On the day of hatching the digestive tract was closed and completely filled with nutrients (the yolk platelets) that were successively utilized during development. A liver primordium was present in the ventral region of the yolksac. The pancreas was observed on the 2 dph. At the same time, the mouth opening took place. Glandular and nonglandular stomach and anterior and intermediate intestine developed from the yolksac walls. Gastric glands became visible on the 7 dph. The primary intestine developed into the spiral intestine. At the moment of onset of exogenous feeding the yolk material was completely exhausted and there was not mixed feeding observed in sterlet larvae. The fish started exogenous feeding on the 9 dph, which was accompanied with evacuation of melanin plug. At the end of endogenous feeding the digestive tract of sterlet larvae was developed and functional, so they could properly utilize food.

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Section: Discussioncontrasting

confidence: 49%

The ontogenetic development of the digestive tract and accessory glands of sterlet (Acipenser ruthenus L.) larvae during endogenous feeding

Wegner

Ostaszewska

Rozek³

2009

Rev Fish Biol Fisheries

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“…Nesses casos, para reduzir o tempo de dependência do plâncton e acelerar a introdução da ração, tem-se associado a ração com o plâncton, o que tem proporcionado melhores rendi-mentos na larvicultura de piracanjuba (Pedreira & Sipaúba-Tavares, 2002) e dourado (Vega-Orellana et al, 2006). Outro recurso é o uso da ração suplementada com enzimas para facilitar sua digestibilidade, como verificado com larvas de pacu Piaractus mesopotamicus (Tesser et al, 2006).…”

Section: Introductionunclassified

Efeito do tamanho da presa e do acréscimo de ração na larvicultura de pacamã

et al. 2008

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RESUMO -Objetivou-se estudar o efeito do tamanho da presa, com ou sem adição de ração na larvicultura do pacamã (Lophiosilurus alexandri), espécie nativa da bacia do Rio São Francisco ameaçada de extinção. As larvas foram cultivadas em aquários por 16 dias e alimentadas com zooplâncton natural, selecionado em malhas de 650 e 1.300 μm, com ou sem ração.A oferta de zooplâncton de maior tamanho resultou em melhor desenvolvimento das larvas de pacamã, comprovando a vantagem do fornecimento de partículas alimentares maiores para o potencial de crescimento da espécie. O aumento na quantidade de ração não influenciou o desempenho das larvas, evidenciando a baixa ou falta de capacidade das larvas em digerir a ração ofertada. O fornecimento de ração diminuiu o pH e aumentou a condutividade elétrica, prejudicando a qualidade da água, o que não afetou o desempenho das larvas.Palavras-chave: cultivo de larvas, espécie nativa, extinção, manejo alimentar, repovoamento, sistema intensivo Effect of prey size selection and feeding on the larviculture of pacamãABSTRACT -The effect of prey size selection and feeding on pacamã Lophiosilurus alexandri larvae culture (native specie of San Francisco basin classified as threatened of extinction) was evaluated. The larvae were cultivated in aquariums during 16 days and fed with natural zooplankton, screened in 650 and 1300 μm sieve, with and without ration. The offer of zooplankton of largest size provided a better development of the pacamã larvae, demonstrating the need of alimentary particles larger for the growth potential of the species. The increase of the amount of ration did not affect the performance of the larvae, evidencing low or lack of capacity in digesting the offered ration. The ration fed reduced the pH and increased the electric conductivity, worsening water quality, which did not affect the performance of the larvae.

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“…The low performance usually observed when feeding an inert diet to marine fish larvae from mouth opening onwards may be due to sub-optimal diet composition and the larva's poor ability to modulate its digestive enzymes (Cahu & Zambonino Infante 2001). Therefore, the co-feeding strategy has been proposed for farmed species, such as dourado (Vega-Orellana, Fracalossi & Sugai 2006), Asian sea bass (Curnow, King, Partridge & Kolkovski 2006b), pikeperch (Hamza, Mhetli & Kestemont 2007) and cod (Rosenlund & Halldórsson 2007).…”

Section: Introductionmentioning

confidence: 99%

Fine tuning of feeding practices for hatchery produced Persian sturgeon,Acipenser persicusand Beluga sturgeon,Huso huso

et al. 2011

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In this work, we investigated the effects of various feeding treatments on the survival and growth of Huso huso and Acipenser persicus larvae during a 20day culture period. Three replicate groups (250 fish/replicate) of first-feeding larvae were fed according to four main feeding regimes: (1) live food (live nauplii of brine shrimp Artemia urmiana); (2) indirect transition (5-7 days live food followed by gradual transition to formulated diet); (3) direct transition (using different combinations of live and formulated diet from the start feeding onwards); and (4) formulated feed (FD) from the start of feeding. In H. huso larvae, combining live food and manufactured diets (co-feeding) from the first feeding stage onwards (direct transition) resulted in significantly higher weight gain than the other regimes. Survival was significantly higher in H. huso larvae fed solely live food or the direct transition regimes compared with indirect transition and FD. In A. persicus larvae, growth and survival were higher in the indirect transition feeding regime than in the other regimes. On the basis of the results of this study, we recommend co-feeding of H. huso immediately from the commencement of exogenous feeding, but co-feeding of A. persicus should start 7 days after prior feeding with live food.

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Dourado (Salminus brasiliensis) larviculture: Weaning and ontogenetic development of digestive proteinases

Cited by 60 publications

References 23 publications

The ontogenetic development of the digestive tract and accessory glands of sterlet (Acipenser ruthenus L.) larvae during endogenous feeding

The ontogenetic development of the digestive tract and accessory glands of sterlet (Acipenser ruthenus L.) larvae during endogenous feeding

Efeito do tamanho da presa e do acréscimo de ração na larvicultura de pacamã

Fine tuning of feeding practices for hatchery produced Persian sturgeon,Acipenser persicusand Beluga sturgeon,Huso huso

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