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LIVE AND IN COOLED Artemia SP. FOR PACAMÃ Lophiosilurus alexandri (SILURIFORMES) FEEDING

Marcelo M. Pedreira*, Maria, P. Nascimento, Maíra S. A. Rocha, Claude E. Boyd, Marianne Schorer, José C. E. dos Santos, Robson C. Silva, Stella I. R. Lobato, André L. Ferreira.
 
Laboratory of Aquaculture and Aquatic Ecology
Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Diamantina-MG - Brazil
CEP 39100-000
marcelomattospedreira@gmail.com

In freshwater fish rearing the major concern is the offering an appropriate food for larvae at first feeding, and it influencing performance, survival and growth of the same. Thus, the aim of this study was to verify the performance and survival of pacamã larvae Lophiosilurus alexandri fed with alive and cooled Artemia sp. nauplii at 0 and 2 ‰ salinity. Larvae were subjected to two feeding treatments and two salinity levels: live Artemia sp. plus 0‰ salinity (LA0); live Artemia sp. plus 2‰ salinity (LA2); frozen Artemia sp. plus 0‰ salinity (FA0); and frozen Artemia sp. plus 2‰ salinity (FA2), offered twice times daily. The experiment was conducted at a completely randomized design with 5 replications in a factorial 2 x 2, during 15 days. Larvae were distributed in 8 L-aquariums, with a density of forty fifth larvae per aquarium. Were evaluated body weight, weight gain, feed conversion, standard and total length, biomass, survival, body width, intestinal quotient, Fulton´s condition factor, and water quality. The weight, weight gain, standard and total lengths increased with the supply of the living Artemia sp., with 2 ‰ salinity. The survival and Fulton´s condition factor had positive influence with the use of living Artemia sp., with 0 ‰ salinity. The water quality was not affected by the salinity or food. It is suitable for growing pacamã larvae the use of living Artemia sp., in 2 ‰ salinity, improving their performance.

Acknowledgements: Capes, CNPq, FAPEMIG and BNB.

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