Growth and length-weight parameters of Pacific mackerel (Scomber japonicus) in the gulf of Guayaquil, Ecuador
Zenck, E.C. (Fisheries and Oceanography Consulting, P.O. Box 09-01-4382, Guayaquil (Ecuador))
The seasonally oscillating growth parameters and length-weight relationship for Scomber japonicus caught in the Gulf of Guayaquil, Ecuador, were determined based on length-frequency data from 1989 to 1996, using the FiSAT software package of Gayanilo et al. (1996). Estimates of growth parameters are in general agreement with previous studies on the same species. Results also imply that the growth of S. japonicus slows down during the cold season by approximately 50 percent with respect to the average growth. The mean value of the power b is significantly larger than 3, indicating that the model of allometric growth should be used for the length-weight relationship and calculation of the condition factor
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