Pregled bibliografske jedinice broj: 212476
Local differences in structure, abundance and condition of sardine, Sardina pilchardus in the eastern Adriatic Sea
Local differences in structure, abundance and condition of sardine, Sardina pilchardus in the eastern Adriatic Sea // Workshop on Evaluation and development of ecohydrologic techniques to control water quality degradation in estuaries, lagoons and coastal areas
Split, Hrvatska, 2005. (predavanje, nije recenziran, sažetak, znanstveni)
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Naslov
Local differences in structure, abundance and condition of sardine, Sardina pilchardus in the eastern Adriatic Sea
Autori
Sinovčić, Gorenka ; Zorica, Barbara ; Čikeš Keč, Vanja
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Skup
Workshop on Evaluation and development of ecohydrologic techniques to control water quality degradation in estuaries, lagoons and coastal areas
Mjesto i datum
Split, Hrvatska, 29.09.2005. - 01.10.2005
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Ključne riječi
Sardina pilchardus; Adriatic Sea
Sažetak
Length distributions, length-weight relationships, condition and seasonal changes in abundance of sardine, Sardina pilchardus (Walb., 1792), the major Adriatic Sea zooplanktivore and the most important fish species in the Adriatic Sea were studied. The random samples were obtained from the sardine spawning ground (off Dugi otok, N= 969) and from the nursery ground (the Krka River estuary, N=1 245). Sardine were caught by purse seine and beach seine. Representative samples were collected monthly during 2002-2004 period. Monthly fluctuations in length frequency distributions of sardine were observed. Total lengths were in range from 4.9 to 12.5 cm (mean 8.31± ; 1.41 cm, Krka River estuary) and 11.0 to 19.5 cm (off Dugi otok). The minimum and maximum weights recorded were 1.02 g and 11.18 g (mean 4.40± ; 1.87g, Krka River estuary) as well as 6.18 and 63.97 (mean 31.42± ; 8.98, off Dugi otok), respectively. Length-weight relationships of sardine from the Krka River estuary and off Dugi otok were described by the expression: (R2=0.9588) and (R2=0.8519), respectively. Isometric relative growth was established (t= 3.159 ; P<0.001) in sardine from the Krka River estuary and positive allometry (t= 2.997 ; P<0.001) in sardine from the catch samples realised off Dugi otok. Allometric condition factor (Ka) of sardine specimens, which ranged from 7.5 and 10.5 cm (Krka River estuary) and 13.0 and 16.0 cm (off Dugi otok), was analysed and showed the highest values at the beginning of autumn, especially during 2002/03 period. Later on the condition coefficient decreased until the lowest values noted in February. In terms of seasonal fluctuations in fish condition and abudance index, the decrease of both parameters was observed from 2002 to 2004.
Izvorni jezik
Engleski
Znanstvena područja
Biologija
