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ICES Journal of Marine Science: Journal du Conseil Advance Access originally published online on July 27, 2007
ICES Journal of Marine Science: Journal du Conseil 2007 64(8):1569-1572; doi:10.1093/icesjms/fsm115
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© 2007 International Council for the Exploration of the Sea. Published by Oxford Journals. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

Seasonal variation in the trawl codend selectivity of picarel (Spicare smaris)

Hüseyin Özbilgin, Zafer Tosunoglu, Adnan Tokaç and Gülnur Metin

Ege University, Fisheries Faculty, 35100 Bornova, Izmir, Turkey

Correspondence to H. Özbilgin: tel: +90 532 706 19 77; fax: +90 232 374 74 50; e-mail: ozbilginh{at}yahoo.com or huseyin.ozbilgin{at}ege.edu.tr

Özbilgin, H., Tosunoglu, Z., Tokaç, A., and Metin, G. 2007. Seasonal variation in the trawl codend selectivity of picarel (Spicare smaris). – ICES Journal of Marine Science, 64: 1569–1572.

Seasonal selectivity of commercial 40 mm polyethylene codend was tested for picarel (Spicara smaris) in spring (4–18 April 2002), summer (10–25 July 2002), autumn (26 September–2 October 2002), and winter (22–23 January 2003) in the Aegean Sea. Data were collected using the covered codend technique and analysed using the logistic equation with the maximum likelihood method. Four sets of selection curves were analysed and compared using the model developed by Fryer (1991). Highest L50 is in autumn (13.82 cm; s.e. 0.62), when water temperature is highest and the fish are expected to be in their best condition after summer feeding. Lowest L50 is in spring (11.09 cm; s.e. 0.51), when water temperature is lowest and the fish are at their spawning stage. However, there is not sufficient evidence to say that the seasonal variation in the selectivity of 40 mm polyethylene codend for picarel is statistically significant (p > 0.05).

Keywords: Aegean Sea, picarel (Spicara smaris), seasonal variation, trawl selectivity

Received 26 July 2006; accepted 21 June 2007; advance access publication 27 July 2007.


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