Densidad, crecimiento y reclutamiento del caracol rosado Strombus gigas L. (Gasteropoda: Strombidae) en Quintana Roo, México
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Navarrete, Alberto de Jesús
Oliva Rivera, José Juan
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Universidad de Costa Rica
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Se evaluó mensualmente la densidad, el crecimiento y el reclutamiento,del caracol rosado Strombus gigas en Punta Gavilán, Quintana Roo. de febrero 1992 a febrero 1993, con muestreos en un área de tres hectáreas. Adicionalmente se midió temperatura, oxígeno disuelto y salinidad de la colunma de agua y se recolectaron sedimentos para el análisis granulométrico y contenido de materia orgánica. La composición de los sedimentos y la cobertura vegetal son aparentemente fundamentales en la presencia de S. gigas. La densidad promedio de organismos fue de 0.0052 ±O.023 indo m·2 y la estructura de la población correspondió a juveniles. El análisis de los datos indicó que el reclutamiento presenta dos picos, uno en marzo y otro en diciembre. Utilizando el método de marca-recaptura se determinó un crecimiento promedio mensual de 4.93 ±2.47 rnmImes y un tamaño poblacional de 415 individuos, por lo que no es. posible realizar la extracción comercial. Los factores biológicos del lugar son particulares y brindan al caracol un hábitat de calidad, por lo que se recomienda su conservación como refugio y zona de reclutamiento y crecimiento de S. gigas.
Density, growth and recruitment of queen conch (Strombus gigas L.) was monthly evaluated in a tbree hectare plot from February 1992 to February 1993. Temperature, dissolved óxygen and salinity were recorded from the water column. Sediment grain size and organic matter content were measured. Apparently, sediment composition and plant cover are important for the presence oF S. gigas. Mean density was 0.0052 ± 0.023 individuals m-2, with juveniles dominating numerically. Recruitment had a bimodal distribution, with peaks in March and December. Using the capture-recapture method, a mean growth oC 4.93 ± 2.47 nunlmonth was calculated. The population size was 415 individuals, too small for commercial exploitation. Punta Gavilan should be protected because biological conditions there are unique and represent a high quality environment for the concho
Density, growth and recruitment of queen conch (Strombus gigas L.) was monthly evaluated in a tbree hectare plot from February 1992 to February 1993. Temperature, dissolved óxygen and salinity were recorded from the water column. Sediment grain size and organic matter content were measured. Apparently, sediment composition and plant cover are important for the presence oF S. gigas. Mean density was 0.0052 ± 0.023 individuals m-2, with juveniles dominating numerically. Recruitment had a bimodal distribution, with peaks in March and December. Using the capture-recapture method, a mean growth oC 4.93 ± 2.47 nunlmonth was calculated. The population size was 415 individuals, too small for commercial exploitation. Punta Gavilan should be protected because biological conditions there are unique and represent a high quality environment for the concho