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Length–weight relationships and biological data on guayana pike‐conger C ynoponticus savanna ( B ancroft, 1831)
Author(s) -
ReisFilho J. A.,
Specht L.
Publication year - 2015
Publication title -
journal of applied ichthyology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.392
H-Index - 62
eISSN - 1439-0426
pISSN - 0175-8659
DOI - 10.1111/jai.12662
Subject(s) - biology , overfishing , gonadosomatic index , population , reproduction , bay , catch per unit effort , fishing , fishery , ecology , fecundity , geography , demography , archaeology , sociology
Summary This study presents the first references available for C ynoponticus savanna length–weight relationships ( LWR ) as well as other biological information, based on its unique population in the S outh A tlantic O cean, specifically, T odos os S antos B ay, on the B razilian 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 TL 3.31 . Length at first maturity ( L m ) 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.