Aspectos reproductivos del Tiburón Zorro de Anteojos (Alopias superciliosus) desembarcados en el Puerto de Santa Rosa, Cantón Salinas, Provincia de Santa Elena.
No hay miniatura disponible
Fecha
2015
Autores
Título de la revista
ISSN de la revista
Título del volumen
Editor
Resumen
Los aspectos reproductivos del tiburón zorro de anteojos han sido muy poco estudiados en el Ecuador y se encuentra entre las capturas de pesca artesanal, por eso es de mucha importancia conocer la proporción de sexo y su talla de madurez sexual.
En este estudio se describe los aspectos reproductivos del Tiburón Zorro de anteojos (Alopias superciliosus), realizado en el Puerto de Santa Rosa – Cantón Salinas Provincia de Santa Elena, se registraron 133 ejemplares (61 hembras; 72 machos), durante los meses de Octubre 2012 a Septiembre del 2013 (época seca y lluviosa), el intervalo de tallas para machos fue de 132 -341 cm LT (x= 275.89); mientras que en hembras 119 – 402 cm LT (x= 280.70), la proporción sexual entre hembras y machos fue de 1H: 1,18M y en los fetos de 1H: 1M lo que indica que existe segregación por sexos al incrementar su talla. Se estimó la talla media de madurez sexual en machos en 252 cm LT; mientras que en hembras de 273 cm LT. En relación, entre la estructura reproductiva del macho con el clasper y LT presento una correlación positiva significativa, mientras que en las hembras se encontró una correlación positiva moderada entre sus estructuras reproductivas internas y su Longitud Total.
The reproductive aspects of bigeye thresher sharks have been briefly studied in Ecuador and it is one of the apprehensions of handmade fishing, that's why it is quite important to know the proportion of sex and size of sexual maturity. In this study it is certainly described the reproductive aspects of bigeye thresher sharks (Alopias superciliosus), performed in the Port of Santa Rosa – Canton Salinas, Province of Santa Elena, there were 133 specimens registered (61 females; 72 males), during October, 2012 to September, 2013 (dry and rainy season), the sizes range for males was 132-341 cm LT (x = 275.89); while in females 119 – 402 cm LT (x = 280.70), the sexual proportion between females and males was of 1H: 1.18M and in the fetuses of 1H: 1M which indicates that segregation exists for gender on having increased its size. There was an estimated size of the first sexual maturity in males in 252 cm LT; while in 273 cm females LT. In relation, between the reproductive structure of the male with the clasper and LT, presenting a significant positive interrelation, while in females there was a moderated positive interrelation between its internal reproductive structures and its LT.
The reproductive aspects of bigeye thresher sharks have been briefly studied in Ecuador and it is one of the apprehensions of handmade fishing, that's why it is quite important to know the proportion of sex and size of sexual maturity. In this study it is certainly described the reproductive aspects of bigeye thresher sharks (Alopias superciliosus), performed in the Port of Santa Rosa – Canton Salinas, Province of Santa Elena, there were 133 specimens registered (61 females; 72 males), during October, 2012 to September, 2013 (dry and rainy season), the sizes range for males was 132-341 cm LT (x = 275.89); while in females 119 – 402 cm LT (x = 280.70), the sexual proportion between females and males was of 1H: 1.18M and in the fetuses of 1H: 1M which indicates that segregation exists for gender on having increased its size. There was an estimated size of the first sexual maturity in males in 252 cm LT; while in 273 cm females LT. In relation, between the reproductive structure of the male with the clasper and LT, presenting a significant positive interrelation, while in females there was a moderated positive interrelation between its internal reproductive structures and its LT.
Descripción
Palabras clave
ALOPIAS SUPERCILIOUS, ASPECTO REPRODUCTIVO, CLASPER, TALLA MEDIA DE MADUREZ SEXUAL