Las variaciones en abundancia mensual se estimó con el método de Jolly. Todas las conchas encontradas se se midieron y marcaron con una etiqueta numerada que identificó la fecha de muestréo y la localidad. Se muestrearon mensualmente, caracoles del parque Xel-Ha, de Noviembre 2001 a Agosto 2005. Este aporte usa datos de marcaje recaptura para estimar los parámetros de la ecuación de von Bertalanffy y variaciones en el número de la población, para una población sin captura dentro de un área protegida, para aclarar que parámetros se adaptan mejor para estudios de la población entera o para las fracciones de juveniles y adultos por separado. Los estudios poblacionales se basan en el análisis de las fluctuaciones de las frecuencias de tallas, usando ya sea la longitud de la concha o el peso total de los organismos vivos. Key words: conch, growth, population parameters, marine protected area, Caribbean, MPA.Įl caracol reina, Strombus gigas, es un gasterópodo de importancia comercial en el Caribe. It is concluded that population studies from length frequency data, should be analyzed independently in two groups, shell for the juvenile fraction and lip thickness for the adult fraction, or if it is not possible to analyze the population fractions separately, weight should be used to avoid miss calculation of the age structure. There were two pulses of recruitment: fall-winter and summer. Natural mortality was 0.49/year for juveniles and 0.29/year for adults. A maximum age of 19 years was estimated from the population. Shell length gave the best fit for the juvenile fraction: L∞=251, K=0.3, C=0.8 Wp=0.3 and lip thickness for adults: L∞=47.78, K=0.17, C=0.1, Wp=0.86, while, the whole population was bet- ter represented by weight: L∞=3850, K=0.36, C=0.8, Wp=0.3. Conchs make only temporary use of Xel-Ha cove. The population number varied through the study, with a minimum of 49 in April 2003 and maximum of 9 848 during June 2005. Length, lip thickness and weight increments were used to estimate the von Bertalanffy growth equation parameters with Appeldoorn’s subroutine of FISAT program. Every conch found was measured and marked with a numbered tag that identified month and locality and monthly abundance was estimated with Jolly’s method. Conchs from Xel- Ha Park were monthly sampled from November 2001 to August 2005. This contribution used mark-recapture data to estimate the von Bertalanffy equation parameters and population number variation within a non harvest population from a protected area, to clarify the biometric parameters that better suit for the whole population, or for the juvenile and adult fractions. ![]() Population studies are based on size frequency analysis, using either length or weight parameters for the whole live organism. ![]() ![]() The queen conch, Strombus gigas, is a gastropod of commercial importance in the Caribbean. Erick Baqueiro Cárdenas 1 * & Dalila Aldana Aranda 2 *
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