Resumo

CRUZ-CASALLAS, Nubia E et al. Productive performance of yaque (Leiarius marmoratus Gill, 1870) under different stocking densities in ground ponds. Rev Colom Cienc Pecua [online]. 2010, vol.23, n.3, pp.325-335. ISSN 0120-0690.

The commercial production of catfish species is increasing in several countries. One of these species, the so called yaque fish (Leiarius marmoratus) has interesting potential due to its good performance and adaptation to dry diets. Therefore, the present study evaluated the productive performance of yaque under several stocking densities. Fingerlings were previously conditioned to a commercial diet for five months in ground ponds. A total of 591 fish, aged three months post-hatching, were used. The initial fish weight was 20.4 ± 2.4 g and the initial size was 12.2 ± 2.4 cm. Fish were distributed under three stocking densities (0.5, 1 and 2 fish/m²) and were fed three times per day with a commercial diet (30% CP). The intermediate density (1 fish/m²) resulted in the best gain (549 ± 42.8 g), height gain (28.1 ± 0.8 cm), average daily gain (3.01 ± 0.23 g/día), specific growth rate (2.14 ± 0.07%) and relative growth factor (14.4 ± 2.95).

Palavras-chave : densidad de siembra; desempeño productivo; Leiarius marmoratus; leiarius marmoratus; performance; stocking densities.