Size distribution and monthly variation of ovarian development for the female blue swimmer crab, <em>Portunus pelagicus</em> in Beibu Gulf, off south China

Zhijun Liu; Xugan Wu; Wei Wang; Binlun Yan; Yongxu Cheng

doi:10.3989/scimar.03919.24A

Autores/as

Zhijun Liu Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University - Jangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology
Xugan Wu Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University - Jangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology
Wei Wang Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University
Binlun Yan Jangsu Key Laboratory of Marine Biotechnology, Huaihai Institute of Technology
Yongxu Cheng Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University

DOI:

https://doi.org/10.3989/scimar.03919.24A

Palabras clave:

cangrejo azul, desarrollo ovárico, talla de madurez, estacionalidad

Resumen

Este estudio se realizó para investigar la distribución del tamaño y la estacionalidad de desarrollo ovárico del cangrejo azul hembra, Portunus pelagicus en el golfo de Beibu, China. Los resultados muestran que, sobre la base de la muda de la pubertad, el GSI (índice gonadosomático), la morfología y las configuraciones histológicos y el ciclo del desarrollo ovárico de P. pelagicus puede dividirse en cinco etapas. Etapa I: La fase de oogonia (OG) dominaba con algunos ovocitos previtelogeicos (PR) y ovocitos vitelogeicos endógenos (EN); Etapa II: fase de EN dominaba con algunos PR y OG; Etapa III: la fase de ovocitos vitelogeicos exógenos (EX) era dominante; Etapa IV: fase de ovocitos casi maduros (NO); Etapa V: fase de ovocitos maduros (MO) y maduración completa del ovario. El índice gonadosomático (GSI) aumentó significativamente durante el desarrollo del ovario (P < 0.05), mientras que el índice hepatosomático (HSI) parecía disminuir. Por lo tanto, se encontró una correlación negativa significativa entre GSI y HSI (P < 0.01). La menor anchura del caparazón (CW) de una hembra madura y CW del 50% de las hembras maduras eran 79.2 mm y 108.2 mm, respectivamente. La CW y el peso corporal de la clase de tamaño dominante oscilaban entre 86-115 mm y 40-120 g respectivamente. Por otra parte, el GSI de la hembra más grande de P. pelagicus se encontró en marzo, mientras que el pico de las hembras ovígeras se produjo en abril en la población del golfo de Beibu.

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