Talla de madurez sexual en hembras de Euphylax robustus recolectadas en aguas costeras frente a la Provincia de Manabí, Ecuador
Fecha
2023
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Facultad de Ciencias Naturales. Universidad de Guayaquil
Resumen
En el presente trabajo se estimó la talla de madurez sexual morfométrica y fisiológica en hembras del cangrejo nadador Euphylax robustus. Las muestras fueron obtenidas de la pesca artesanal de camarón pomada, frente a las costas de la Provincia de Manabí. Se analizó un total de 73 hembras con una talla mínima de 37 mm AC y una máxima de 97 mm AC. Los modelos ajustados fueron el lineal, punto de inflexión y de dos segmentos, seleccionando el mejor mediante el criterio de información de Akaike. El mejor modelo fue el de dos segmentos. El estado de madurez sexual (i.e., maduro/inmaduro) mostró individuos inmaduros con ovarios color crema y un ancho ca. 1 mm mientras que, los maduros tuvieron ovarios de coloración anaranjado-rojizo y un ancho de ovario superior a 3 mm. La talla de madurez sexual morfométrica fue 71.52 mm AC y la fisiológica fue 69.31 mm AC. La madurez sexual de E. robustus se puede relacionar con la estructura de tallas de la especie, para conocer el efecto de la pesca sobre el recurso.
The morphometric and physiological size at sexual maturity was estimated in female of swimming crab Euphylax robustus. The samples were collected from the artisanal shrimp fishery, in front of the Province of Manabí. A total of 73 females with a minimum size of 37 mm AC and a maximum of 97 mm AC were analyzed. The fitted models were linear, inflection point and two segments, selecting the best by Akaike's information criteria. Two segments model was selected as the best model. The stage of sexual maturity (i.e., mature/immature) showed immature individuals with cream-colored ovaries and a width of ca. 1 mm while the mature ones had reddish-orange ovaries and an ovary width greater than 3 mm. The morphometric sexual maturity size was 71.52 mm AC and the physiological one was 69.31 mm AC. The sexual maturity of E. robustus can be related to the size structure of the species, to know the effect of fishing on the resource.
The morphometric and physiological size at sexual maturity was estimated in female of swimming crab Euphylax robustus. The samples were collected from the artisanal shrimp fishery, in front of the Province of Manabí. A total of 73 females with a minimum size of 37 mm AC and a maximum of 97 mm AC were analyzed. The fitted models were linear, inflection point and two segments, selecting the best by Akaike's information criteria. Two segments model was selected as the best model. The stage of sexual maturity (i.e., mature/immature) showed immature individuals with cream-colored ovaries and a width of ca. 1 mm while the mature ones had reddish-orange ovaries and an ovary width greater than 3 mm. The morphometric sexual maturity size was 71.52 mm AC and the physiological one was 69.31 mm AC. The sexual maturity of E. robustus can be related to the size structure of the species, to know the effect of fishing on the resource.
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MADUREZ FISIOLÓGICA, MADUREZ MORFOMÉTRICA, MADUREZ FUNCIONAL, MADUREZ MACROSCÓPICAS, EDK