Reduction of reproductive parameters of Pogonias courbina (Perciformes, Sciaenidae) in southern Brazil
| Autor: | Paulo Roberto Santos dos Santos, Gonzalo Velasco |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal do Rio Grande (FURG) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Ecology Overfishing 010604 marine biology & hydrobiology Fishing Endangered species Zoology Aquatic Science Biology Sciaenidae Southern black drum biology.organism_classification Fecundity 01 natural sciences Perciformes Pogonias courbina Reproductive period First sexual maturity Animal Science and Zoology Black drum Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2021-06-25T10:47:06Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul In southern Brazil, the Southern Black Drum Pogonias courbina is an estuarine-dependent fish, endangered due to intense fishing in the past decades. This study calculated the reproductive parameters, age (A50) and length of first maturation (L50), batch fecundity, total fecundity and extension of the reproductive period of the P. courbina, in order to test the hypothesis of reduction, caused by heavy exploitation. The value for A50, calculated for both sexes, was 2.13 years. The L50 values for males and females were 42.5 and 46.4 cm respectively, while batch and total fecundity were 63,300 and 2,532,000 oocytes, in a reproductive period that extends from late October to March. Except for the extension of the reproductive period, it was observed that there was a reduction of all the reproductive parameters when compared with specimens, caught before overfishing. The data indicate that management strategies aimed at ecological and fishery sustainability are urgent and necessary. Universidade Estadual Paulista (UNESP), São Vicente, SP Universidade Federal do Rio Grande (FURG), Rio Grande, RS Universidade Estadual Paulista (UNESP), São Vicente, SP Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul: 0142012 |
| Databáze: | OpenAIRE |
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