Crecimiento y mortalidad del pez Haemulon aurolineatum (Teleostei: Haemulidae) en el suroeste de la isla de Margarita, Venezuela

Bravo, Edwis; Eslava, Nora; González, Leo
March 2009
Revista de Biología Tropical;mar-jun2009, Vol. 57 Issue 1/2, p105
We analyzed the growth and natural mortality of the fish known locally as cují (H. aurolineatum) in the southwest of Margarita Island, July 2005 to June 2006. A sample of 1378 males and 1 143 females from artisanal fishing vessels of Boca del Río was analyzed. The common relation for both sexes was expressed by the equation P=0.038*L2.87. The asymptotic length (L∞) was estimated with Powell's (1979) routine and Wetherall (1986), and the growth coefficient (k) with ELEFAN I - FISAT II (FAO-ICLARM). The modal progression analysis was used after decomposition of lengths frequency according to Bhattacharya, and the estimations of L∞ and k optimized according to Gulland and Holt (1959). The growth curve was fitted to von Bertalanffy (1960); it is exponential, with accelerated growth in the first two years and less growth as the fish approaches maximal length. The rate of natural mortality was high (M=1.15 year-1), and probably was caused by high depredation.


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