Naslov
Population structure, size at maturity and condition of sardine, Sardina pilchardus (Walb., 1792), in the nursery ground of the eastern Adriatic Sea (Krka River estuary, Croatia)

Autori
Sinovčić, Gorenka ; Čikeš Keč, Vanja ; Zorica, Barbara

Izvornik
Estuarine, Coastal and Shelf Science (0272-7714) 76 (2008), 4; 739-744

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
sardine; estuary; structure; length-weight relationship; condition; first sexual maturity

Sažetak
A total of 1, 125 specimens of sardine, Sardina pilchardus (Walb., 1792), ranging in total length from 4.9 to 12.5 cm (mean 8.31&#177; ; ; ; 1.41 cm) and in weights between 1.02 g and 11.18 g (mean 4.40&#177; ; ; ; 1.87g) were randomly sampled using a beach seine from the Krka River estuary. Samples were collected monthly according to their occurrence in this area from October to February during 2002/03, 2003/04 and 2004/05, that is simultaneously the spawning period of this species. Monthly fluctuations in the length frequency distributions of sardine during that time were observed. The length-weight relationship of all sardine specimens was described by the equation: (r2=0.9626) ; isometric nature of relative growth was established (t= -5.1495 ; p<0.05). According to the allometric condition factor Ka, sardine specimen were in better somatic condition at the beginning of their appearance (spawning period) in the Krka River estuary. The length at which 50% of sardine were mature (L50) was calculated to be 7.9 cm.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

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