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Patricia Torres-Pineda Carlos M. Rodríguez-Peña Óscar M. Lasso-Alcalá Arlen Marmolejo

Resumen

 Se estudió la estructura de la población de Limia zonata (Nichols, 1915) en cuatro localidades del río Maimón, provincia Monseñor Nouel, República Dominicana. Se calculó la proporción sexual y de adultos-juveniles para todas las localidades muestreadas. Se encontró que la proporción sexual de L. zonata es significativamente diferente de 1:1 y está sesgada hacia las hembras (1.0: 1.6). Los peces juveniles fueron más abundantes y frecuentes que los adultos (69.3%). Se midieron y pesaron más de 800 peces para analizar la frecuencia de clases de tallas, morfometría y condición corporal de la especie. Se distinguieron diez clases de tallas que variaron sus frecuencias en función del sexo. La longitud total de los ejemplares medidos estuvo dentro del rango 6.50-65.69 mm, mientras que el peso total varió entre 0.004 y 3.941 g. La morfología varió entre sexos y se encontró un marcado dimorfismo sexual. Todas las variables morfométricas estudiadas presentaron un alto nivel de asociación (r). El ajuste de los modelos de regresión (r2) de las relaciones morfométricas estuvo entre 85 a 99%. La relación longitud estándar-peso total mostró variación significativa entre los sexos, sugiriendo distintos ritmos de crecimiento. El Factor de Condición Relativo (Kn) demostró el buen estado de salud de la población de peces, pero se detectaron variaciones entre los sexos.

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Palabras Clave

Poeciliidae, Limia, proporción sexual, morfometría, ecosistema fluvial

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Cómo citar

Torres-Pineda, P., Rodríguez-Peña, C., Lasso-Alcalá, Óscar y Marmolejo, A. (2019) «Estructura poblacional del pez endémico Limia zonata (Cyprinodontiformes: Poeciliinae) en el río Maimón, República Dominican»a, Novitates Caribaea, (13), pp. 22-38. Disponible en: http://novitatescaribaea.do/index.php/novitates/article/view/190 (Accedido: 20abril2019).