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      Biología reproductiva del pepino de mar Parastichopus parvimensis (Echinodermata: Holothuroidea) de Isla Natividad y Bahía Tortugas, Baja California Sur, México Translated title: Reproductive biology of the sea cucumber Parastichopus parvimensis (Echinodermata: Holothuroidea) at Isla Natividad and Bahía Tortugas, Baja California Sur, Mexico

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          Abstract

          Se estudió la reproducción del pepino de mar Parastichopus parvimensis en Isla Natividad (abril de 2000 a agosto de 2001) y Bahía Tortugas (marzo de 2003 a marzo de 2004), Baja California Sur, México. Las muestras se recolectaron manualmente por medio de buceo semiautónomo. Parastichopus parvimensis es una especie dioica, sin dimorfismo sexual externo, con gónada ramificada. El desarrollo de la gónada confirmó la existencia de cinco estadios: indiferenciado, gametogénesis, madurez, desove y post-desove. Se determinó un periodo de reproducción anual sincrónico en ambos sitios. La proporción de sexos fue 1:1. La variación del índice gonadosomático se relacionó directamente con el desarrollo gonadal. La máxima madurez y desove se registraron de febrero a mayo en ambos sitios de estudio. El peso de primera madurez fue 140 g en Isla Natividad y 120 g en Bahía Tortugas. En ambas áreas P. parvimensis presentó atrofia estacional de vísceras, de agosto a octubre. Como alternativa de manejo pesquero se propone una época de veda de febrero a mayo, para proteger el evento de reproducción (madurez y desove) y otra de agosto a octubre para salvaguardar el periodo de ausencia y/o atrofia de órganos internos.

          Translated abstract

          The reproduction of the sea cucumber Parastichopus parvimensis was studied from April 2000 to August 2001 at Isla Natividad and from March 2003 to March 2004 at Bahía Tortugas, Baja California Sur, Mexico. Samples were collected manually by semi-autonomous diving. The sea cucumber is a dioecious species, without external sexual dimorphism, with ramified gonad. The development of the gonad confirmed five stages: undifferentiated, gametogenesis, ripe, spawning, and post-spawning; this indicated annual synchronous reproduction in both study areas. The sex ratio was 1:1. The variation of the gonadosomatic index was directly related to the gonadal development. Maximum maturity and spawning were recorded from February to May at both sites. The weight at first maturity was 140 g at Isla Natividad and 120 g at Bahía Tortugas. In both areas P. parvimensis showed seasonal visceral atrophy from August to October. As a fishery management alternative, we propose one closed season from February to May to protect the reproductive season (ripe/spawning), and another from August to October to protect the period when the internal organs are absent or atrophied.

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          Most cited references29

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          The utilization of organic matter in shallow marine sediments by an epibenthic deposit-feeding holothurian

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            Spawning behaviors of northeast Pacific sea cucumbers (Holothuroidea: Echinodermata)

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              Factors influencing rates of sediment ingestion by Parastichopus parvimensis (Clark), an epibenthic deposit-feeding holothurian

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                Author and article information

                Journal
                ciemar
                Ciencias marinas
                Cienc. mar
                Universidad Autónoma de Baja California, Instituto de Investigaciones Oceanológicas (Ensenada, Baja California, Mexico )
                0185-3880
                2008
                : 34
                : 2
                : 165-177
                Affiliations
                [02] La Paz Baja California Sur orgnameInstituto Politécnico Nacional orgdiv1Centro Interdisciplinario de Ciencias Marinas México
                [01] La Paz Baja California Sur orgnameCentro Regional de Investigación Pesquera México cfajardol@ 123456yahoo.com.mx
                Article
                S0185-38802008000200005 S0185-3880(08)03400200005
                ce6df478-ea70-4a88-a6f1-862286308f3b

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : March 2008
                : October 2007
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 32, Pages: 13
                Product

                SciELO Mexico

                Categories
                Artículos

                reproductive cycle,first maturity,ciclo reproductor,indice gonadosomático,primera madurez,gonadosomatic index

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