Conference paper
Abundance, Distribution, Reproductive Parameters and Description of the Fishery of the Bivalve Atrina seminuda in northeastern Venezuela
Proceedings of the annual Gulf and Caribbean Fisheries Institute, Vol.62, pp.404-407
Gulf and Caribbean Fisheries Institute, Inc.
Proceedings of the Gulf and Caribbean Fisheries Institute, 62nd (Cumana, Venezuela, 02/11/2009 - 06/11/2009)
01/01/2010
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Abstract
The population and fishery of the bivalve Atrina seminuda were studied during a year (February 2008 - January 2009) in northeastern Venezuela. The population was sampled monthly by SCUBA diving using transects (10 m(2)) to estimate abundance and biological aspects. Also, information was collected from fishers and wholesalers to estimate catches. Monthly sex ratio was 1:1 during the study period and gametogenic activity was present year round with 2 main peaks (April and August-September). The estimated length at first reproduction was 10.3 cm for both sexes combined, and lower for males (9.7 cm) man for females (13.4 cm). Maximum average densities ((0.39 ind/m(2)), and biomass (39.2 gr/m(2)) were obtained at depths between 0.5 m and 5 m in the southeast of Coche island and west of Mono de Chacopata. There are approximately 60 fishers that use free diving to catch this resource. During fishing operations (2.7 plus or minus 0.25 hours) each fisher catches an average of 166 plus or minus 70 individuals that yield 2.4 plus or minus 1.6 Kg-muscle. Maximum catch was registered in May 2008 and the minimum in January 2009. Length of catches ranged between 5.5 and 26.2 cm, with an average of 16.9 plus or minus 2.1 cm. The fishery appears to be sustainable considering a) average length of capture greater than length at sexual maturity; b) exploitation by free diving which limits fishing to around 6 m depth; c) areas with high densities and biomass which are not currently exploited.
Details
- Title
- Abundance, Distribution, Reproductive Parameters and Description of the Fishery of the Bivalve Atrina seminuda in northeastern Venezuela
- Creators
- Maria Salome Rangel - Universidad de OrienteJeremy Mendoza - Universidad de OrienteLuis Freites - Universidad de OrienteAlejandro Tagliafico - Universidad de OrienteNatividad Garcia - Instituto Venezolano de Investigaciones CientíficasJose Silva - Universidad de Oriente
- Publication Details
- Proceedings of the annual Gulf and Caribbean Fisheries Institute, Vol.62, pp.404-407
- Conference
- Proceedings of the Gulf and Caribbean Fisheries Institute, 62nd (Cumana, Venezuela, 02/11/2009 - 06/11/2009)
- Comment
- Original Spanish title: Abundancia, Distribución y Descripción de la Pesquería del Bivalvo Atrina seminuda en el Nororiente de Venezuela
- Publisher
- Gulf and Caribbean Fisheries Institute, Inc.
- Number of pages
- 404-407
- Identifiers
- 991012979267402368
- Academic Unit
- Faculty of Science and Engineering; Science; National Marine Science Centre
- Language
- English; Spanish
- Resource Type
- Conference paper