Reproductive cycle of gilt sardine, Sardinella aurita, Valenciennes 1847, in the eastern middle Adriatic Sea (CROSBI ID 179036)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Mustać, Bosiljka ; Sinovčić, Gorenka
engleski
Reproductive cycle of gilt sardine, Sardinella aurita, Valenciennes 1847, in the eastern middle Adriatic Sea
The annual reproduction cycle of gilt sardine, Sardinella aurita, based on gonad maturity stages, gonad weight and gonadosomatic index was presented in this study. A total of 2033 individuals of gilt sardine (983 males, 1021 females and 29 undetermined) were analysed. Fish were collected monthly from commercial purse seiners between November 2007 and January 2009 in the eastern middle Adriatic Sea, (mesh size 8 mm /bar length/ ; sampling: five boats per month). Based on the monthly evolution of gonad maturation stages, gonad weights and gonadosomatic index, the peak spawning season was determined to be from June to August. Variations in sea surface temperature (SST) coincided with monthly variations of the gonadosomatic index. Highest monthly average values for both analysed parameters were recorded in July (GSI=3.38 ; T=26.5°C). Fifty per cent (L50) of males and females reached sexual maturity at TL 15.8 cm and at 16.6 cm, respectively. Absolute fecundity ranged from 8 458 to 48 032 (mean 34 565 ± 10 310), whereas relative fecundity was from 171 to 722 (mean 385 ± 104.35). Mean value of the oocyte size was 0.53 ± 0.10 mm.
gilt sardine; reproductive cycle; gonad maturation; GSI; fecundity
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Podaci o izdanju
28 (1)
2012.
46-50
objavljeno
0175-8659
10.1111/j.1439-0426.2011.01908.x