Diet composition of adult twaite shad (Alosa fallax) in the Aegean Sea (Izmir Bay, Turkey)
Makaleler > Tam Makale · 2011
Yazarlar: Tevfik CEYHAN, Okan AKYOL, T. Murat Sever, Ali KARA
Journal of the Marine Biological Association of the United Kingdom, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2011, cilt 92, ss 601-604
DOI: 10.1017/s0025315411000750
Özet
Specimens of twaite shad,Alosa fallaxwere sampled from commercial purse seiners and trammel netters in Izmir Bay during November and December 2007. A total of 287 prey items from 14 taxa from 208 stomachs were recorded. The primary food of twaite shad was found to be fish, especially anchovyEngraulis encrasicolus, which was the most frequent (%F = 66.11) and abundant (%N = 63.64) prey item, and also had the highest percentage by weight (%W = 81.91). Decapoda, Isopoda, Ostracoda and Copepoda (Calanusspp.,Candocia armata, Temora styliferafrom Calanoida andCorycaeus spp.from Cyclopodia), were recorded occasionally with low values for all indices. The study showed that in the Aegean SeaAlosa fallaxis a predator of small pelagic fish,E. encrasicolus, A. boyeri, S. pilchardus, and some crustaceans. BenthopelagicP. acarneand demersalS. hepatuswere first recorded in diet of twaite shad.