Actividad reproductiva del salmón de mar (Pseudopercis semifasciata) en aguas costeras de la provincia de Buenos Aires durante el período 2012-2014
2017; Volume: 30; Linguagem: Inglês
ISSN
2683-7595
AutoresSofía López, María Inés Militelli,
Tópico(s)Aquaculture Nutrition and Growth
ResumoThe reproductive activity of Argentine sandperch (Pseudopercis semifasciata) in the Buenos Aires Province coastal waters close to the Quequen/Necochea port was analyzed. The material derived from landing samplings performed by the Instituto Nacional de Investigacion y Desarrollo Pesquero (INIDEP) in the 2012-2014 period. The study of gonadal maturity stages allowed to determine that the species reproductive time in the area extends from August through February, with a marked increase of the gonadosomatic index and the presence of females in spawning activity or with postovulatory follicles, indicators of recent spawnings. Batch fecundity, that showed a positive relationship with the length and weight of ovary-free females, had a mean value of 93,483 hydrated oocytes. Relative fecundity varied between 18 and 51 oocytes per gram of ovary-free female and showed a negative linear relationship with length and weight. The dry weight and diameter of hydrated oocytes and the oily drop did not relate to the maternal characteristics in a significant way. The largest landings, that took place in March, September and October, showed that the last two months coincided with the time of the highest reproductive activity of the species.
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