Biología reproductiva del pez palo, Percophis brasiliensis (Quoy et Gaimard, 1824) en aguas costeras de la provincia de Buenos Aires, Argentina.

MILITELLI, M I; MACCHI,

Trujillo

Congreso; VIII Congreso Latinoamericano sobre Ciencias del Mar.; 1999

Reproductive biology of Percophis brasiliensis, (Quoy et Gaimard, 1824) in coastal waters off Buenos Aires province (Argentina). The reproductive biology of Percophis brasiliensis sampled during December 1998 in coastal waters off Buenos Aires province (36° - 42° S) , was studied by using macroscopic and microscopic gonad analysis. This species is a batch spawner with indeterminate annual fecundity. Length at first maturity for males and females was 28,98 and 38,34 cm TL, respectively. During December reproductive activity decreased, and spawning females were concentrated near the coast between Claromecó and Necochea (38° 30’- 39º S). At this area, a bottom thermal front was observed. Spawning frequency determined by using the incidence of females with one-day-old postovulatory follicles was about 6 days. Mean batch fecundity was 188,912 hydrated oocytes for one 56-cm-TL female. This variable was a power function of length and a linear function of ovary-free body weight. Relative fecundity ranged between 155 and 369 hydrated oocytes per female gram (ovary-free). . The reproductive biology of Percophis brasiliensis sampled during December 1998 in coastal waters off Buenos Aires province (36° - 42° S) , was studied by using macroscopic and microscopic gonad analysis. This species is a batch spawner with indeterminate annual fecundity. Length at first maturity for males and females was 28,98 and 38,34 cm TL, respectively. During December reproductive activity decreased, and spawning females were concentrated near the coast between Claromecó and Necochea (38° 30’- 39º S). At this area, a bottom thermal front was observed. Spawning frequency determined by using the incidence of females with one-day-old postovulatory follicles was about 6 days. Mean batch fecundity was 188,912 hydrated oocytes for one 56-cm-TL female. This variable was a power function of length and a linear function of ovary-free body weight. Relative fecundity ranged between 155 and 369 hydrated oocytes per female gram (ovary-free).