Resumen

RUEDA, Mario et al. FISHERIES BIOLOGY PARAMETERS OF THE YELLOW CHUB (KYPHOSUS INCISOR) FOR MANAGEMENT AND CONSERVATION IN THE OLD PROVIDENCE McBEAN LAGOON NATIONAL PARK. Bol. Invest. Mar. Cost. [online]. 2015, vol.44, n.1, pp.71-92. ISSN 0122-9761.

Some parameters of the fisheries biology of Kyphosus incisor (yellow chub) were estimated from fisheries monitoring and a hand line and hook size selectivity experiment carried out in the Old Providence McBean Lagoon National Park from 2006 to 2012. Both monitoring and fishing experiment were conducted to obtain scientific information for management and conservation of K. incisor, including the active participation of islander fisherman, which favored outcomes of interest to the management of the Park. Size range for fishes was 26.5-58.0 cm total length (TL), showing allometric growth [W (g) = 0.02 LT (cm) ^2.95]. There was no statistically significant deviation from the 1:1 sex ratio. The mean size at maturity (MSM) for females was estimated at 47.4 cm TL (95% CI, 47.1 - 47.6 cm), whereas the proportion of advanced stages of maturity increased during the second half of year, which suggests that spawning peaks occur between December and March. Size composition of catch time series suggested that this species is harvested in sizes close to the MSM; however, the indicator (mean catch size /MSM) trend was growing. The selectivity experiment aimed at comparing the fish size caught by three different J-style hook sizes, standardizing other sources of variation, in order to determine the hook size that maximizes the probability of catching fish above the MSM (9 hook). Management and conservation measures of K. incisor obtained from this study are as follow: I) in the hypothetical case of a ban, it must be established consistent with the reproductive peak of the species, i.e. between December and March; II) minimum capture legal size should be between 47 and 48 cm total length, III) restrict the use of small hooks (10 or lower); IV) increase in fishing effort with the entry of new fishermen should not be allowed; V) process of management measures by fishing agreements with resource users should continue.

Palabras clave : Mean size at maturity; Selectivity; Hooks; Old Providence Island; Colombian Caribbean.

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