Relación longitud-peso del rubio (Salminus affinis Steindachner, 1880) en la cuenca del río Sinú, Colombia

Abstract

Objective: To estimate the length-weight relationship of rubio in the Sinu river basin, as a contribution to the management of their fishery. Materials and methods: Between January 2000 and August 2005, 122 individuals with sizes between 9.3 and 63.0 cm total length (TL) and weight (WT) ranged between 6.6 to 3966.0 g were collected. Resultados: The length-weight relationship was: TW = 0.005 (± 0.03) TL3.19 (± 0.02), positive allometric growth coefficient (b), and correlation coefficient of 0.99. The growth coefficient varied between 3.34 y 3.21 without statistically significant differences (p<0.05). The condition factor oscillated between 0.003 y 0.005, without statistically significant differences (p<0.05). We found a correlation among the condition factor, the level of the Sinu river, and spawning season of the rubio, which extends from March to September. Conclusions: Rubio have adapted to the new conditions of the Sinu river as determined by lack of significant differences in size and weight. © 2009 Universidad de Córdoba, Montería, Colombia.