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Resistance to fasting and effect of delaying first feeding on growth and survival in african catfish Heterobranchus bidorsalis larvae (Geoffroy Saint-Hilaire, 1804)

Yao Laurent Alla, Nobah Céline Sidonie Koco, Kouamé Frédéric Affourmou, Kedi Roland Lebon, Mélécony Célestin Ble, Ouattara Mamadou

Département Aquaculture, Centre de Recherches Océanologiques (CRO) d’Abidjan, Côte d’Ivoire

Science et Technique, Section Sciences de la Vie et de la Terre, Ecole Normale Supérieure (ENS), Abidjan, Côte d’Ivoire

Laboratoire Central Vétérinaire de Bingerville (LCVB), LANADA, Bingerville, Côte d’Ivoire

Laboratoire d’Hydrobiologie-UFR Biosciences, Université Félix Houphouët Boigny de Cocody, Abidjan, Côte d’Ivoire

Laboratoire d’Environnement et de Biologie Aquatique, UFR SGE, Université Alassane Ouattara- Abidjan, Côte d’Ivoire

Key words: Heterobranchus bidorsalis, Larvae, Fasting, Growth, Survival.

Abstract

heiso_u0After the artificial reproduction of catfish Heterobranchus bidorsalis, larvae of two days old and 2.23 ± 0.27 mg of mean weight were used to perform two experiments in order to assess their resistance to fasting and the effect of delaying first feeding on their growth and survival. In the first experiment, it was noted that the first larvae died at D5 (3.33%), the largest daily mortality was recorded at D10 with 53.33% and all larvae died at D11 (6.67%). At the end of the second experiment, results showed that growth was better in larvae fed at D6 (594.25 ± 107.05 mg mean weight) than those fed at D4 (323.59 ± 110.78 mg) and D2 (275.32 ± 146.58 mg). In contrast, the survival rate was better for larvae fed at D2 and D4 than those fed at D6 with respectively 37.00 ± 16.46%, 18.66 ± 1.47 % and 5.67 ± 6.42%.

Get the original articles: http://www.innspub.net/volume-6-number-3-february-2015-ijb/

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