Casillas-Maldonado, Jorge I.

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Feeding trials of Pangasius hypophthalmus larvae, during the first 2 weeks post hatching
(2012) Casillas-Maldonado, Jorge I.; Kubaryk, John M.; College of Arts and Sciences - Sciences; Garcia, Jorge R.; Wiscovich, Saul; Department of Marine Sciences; Ramírez, Lilliam
A high mortality in the first two weeks after hatching makes Pangasius hypophthalmus culture challenging. Some scientists have attributed this mortality event to cannibalism and bacterial infection. Larvae were presented with different live feeds at different densities to see if the cannibalistic behavior would be avoided, resulting in higher survival rates during these first two weeks. Five different diets were offered to the larvae for 14 days; rotifers, Artemia nauplii, Tetraselmis 3600, and two different mixes of the aforementioned feeds. Results were inconsistent, with Artemia nauplii having the highest survival rate, mean weight and mean length. The other treatments did not reach 1% of survival rates with poor mean weights and lengths. New research suggests that this mortality problem might be of a morphological nature and not a dietary problem.