Biologia reprodutiva do falso-voador, Dactylopterus volitans (TELEOSTEI: DACTYLOPTERIDAE), no litoral norte do estado de São Paulo, Brasil

Abstract

The fishing of the pink shrimp (Penaeus sp.) In southeastern Brazil is not directed only to this fishing resource, causing an impact on the stock of several species, among them the false-fly, Dactylopterus volitans. In this work, the reproductive biology of the species was analyzed based on 592 specimens collected on the north coast of São Paulo by fishing boats, in the period from July 1995 to August 1996. Individuals in the range of 7.0 - 35 were registered , 5 cm CT, with the main fashion in the 10.0 cm CT class. The biometric relationships “standard length (CP) / total length (CT)” and “total weight (PT) / total length (CT)” were determined by the equations: CP = 0.8276 CT - 0.1746 and PT = 0, 0072 CT 3,097. The estimated L50 values ​​for females, males and total were 17.38 cm, 19.25 cm and 18.09 cm, respectively. Comparing K, K´ and RGS, an increase in gonadal weight is observed between the months of November and February, indicative of the spawning season. The L50´ values ​​of the length and reproductive period show that the participation of juveniles in the catch is quite high and that the closed period of the pink shrimp does not preserve the reproductive stock of the false-fly, proving the great impact of fishing shrimp on this species.