Length–weight relationships and biological data on guayana pike‐conger Cynoponticus savanna (Bancroft, 1831) |
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| Authors: | J A Reis‐Filho L Specht |
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| Institution: | 1. ECUS Institut. Education Science and Socio‐Environmental Utility, Salvador, BA, Brazil;2. Laboratório de Ecologia Bent?nica, Universidade Federal da Bahia – UFBA, Ondina, Salvador, BA, Brazil;3. Instituto de Biologia, Universidade Federal da Bahia – UFBA, Ondina, Salvador, BA, Brazil |
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| Abstract: | This study presents the first references available for Cynoponticus savanna length–weight relationships (LWR) as well as other biological information, based on its unique population in the South Atlantic Ocean, specifically, Todos os Santos Bay, on the Brazilian central coast. A total of 464 individuals were obtained from artisanal fishing landings between July 2012 and June 2013. Total lengths ranged from 14.5 to 139.6 cm. The length‐weight relationship was BW = 0.716 TL3.31. Length at first maturity (Lm) was 48.9 cm. Reproduction began gradually in May, reaching a peak around December, with most individuals completing reproduction by January. The gonadosomatic index (GSI) was highest in January (GSI = 0.21) and lowest in March (GSI = 0.024). The male index (GSI = 0.073) was lower than in females (GSI = 0.10) (P < 0.01). This study presents the first population data for C. savanna, which is under threat due to overfishing and habitat loss. |
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