Effect of the lipid droplet adherence on growth and survival of the European hake (Merluccius merluccius)
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AuthorsIglesias-Estévez, J. (José); Lago-Rouco, M.J. (María Jesús); Otero-Pinzas, J.J. (Juan José); Gómez-Ceruelo, M.C. (María Castora); Cal, R. (Rosa); Sánchez-Conde, F.J. (Francisco Javier)
The effect of the adherence of the lipid droplet in the yolk-sac on the growth and survival of the European hake (Merluccius merluccius) larvae was studied under starved and feeding conditions. Recently hatched hake larvae with adhered and non-adhered lipid droplet (ALD and non-ALD) were maintained during 8 days under starvation conditions. The adherence of the lipid droplet positively affected larval survival during starvation. At the end of the yolk consumption period (7–8 days after hatching), 90% of the surviving larvae had an ALD, while 10% of the survivors had a non-ALD and showed a higher mortality rate. In a month feeding experiment, results show that the presence of non-ALD in newly hatched hake larvae negatively affected their growth and survival. Dry weight and length (TL) of 20-days-old larvae with ALD were significantly higher than those with non-ALD. Furthermore, lifespan of those larvae with non-adhered lipid droplet was shorter, with most of them dying during the first ...
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