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Revista de biología marina y oceanografía

versión On-line ISSN 0718-1957

Resumen

RUIZ-RAMIREZ, Salvador et al. Reproduction of the flag cabrilla Epinephelus labriformis in the Bahía de Navidad, Jalisco, Mexico. Rev. biol. mar. oceanogr. [online]. 2018, vol.53, n.3, pp.335-347. ISSN 0718-1957.  http://dx.doi.org/10.22370/rbmo.2018.53.3.1358.

The flag cabrilla, Epinephelus labriformis, is a species of the Serranidae family exploited by commercial fisheries in the Bahía de Navidad, Jalisco, Mexico. The goal of this research was to describe the reproductive characteristics of E. labriformis. Monthly samples were taken from 1998 to 2008 using gillnets. Total length (TL) and total weight (TW) were recorded for each sampled specimen. Gonads were collected, weighted, classified according to their maturation stage and preserved for histological analyses. A total of 940 fish were collected, 521 females and 419 males. Mean length was 30.1 (± 0.14) cm TL for females and 31.3 (± 0.13) cm TL for males. The highest values of the gonadosomatic index and percentage of ripe gonads in both males and females were found in April and August. Condition factor showed little temporal variation. Transitional individuals were identified based on gonad histology; they had ovaries with oocytes in regression and developing testicular tissue. Oocyte development was asynchronical and testicles were lobular. The smallest transition fish was 25.6 cm TL. Mean sexual maturation length was 29.6 cm for females and 31.3 cm for males. Based on maturation lengths and on the length composition of commercial catches, we can assume that caught fish have had, at least, one reproductive event. Main reproductive activity in E. labriformis occurs in spring and summer. Protogynous hermaphroditism was confirmed for this species; this characteristic makes it more vulnerable to fishing impact.

Palabras clave : Reproductive cycle; Serranidae; protogynous; maturation length; gonadosomatic index.

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