Dilek UÇKUN, TUNCAY MURAT SEVER, Melahat TOĞULGA

İzmir Körfezi'nde hamsi (Engraulis encrasicolus,L.,1758)'nin beslenme özellikleri üzerine bir ön çalışma

Bu araştırmada, Aralık 1996-Aralık 1997 tarihleri arasında izmir Körfezi'nden gırgır tekneleriyle avlanan balıkçılardan temin edilen 200 adet hamsi (Engraulis encrasicolus, L, 1758) bireyi incelenmiştir. Örneklerin çatal boylan 6.9-14.0 cm ile ağırlıktan 2.54-21.48 g arasında değişmiştir. Türün boy gruplarına ve mevsimlere göre beslenme özelliklerini ortaya koymak amacıyla mide içerikleri incelenmiştir. Verilerin değerlendirilmesinde Volumetrik Metod ve Sayısal Analiz Yöntemleri kullanılmıştır, incelemeler sonucunda bu türün beslenme alışkanlığının sayısal varlık açısından yıl boyunca oldukça benzer olduğu ve Copepoda'nın en önemli besin grubunu oluşturduğu görülmüştür. Cladocera ve Bivalvia larvalan diğer önemli besin gruptan olarak saptanmıştır.

Anahtar Kelimeler:

Türkiye, Ege Denizi, beslenme davranışı, hamsi, beslenme alışkanlığı

Investigations of the feeding habist of anchovy (Engraulis encrasicolus,L.,1758) in the Izmir bay

In this study, the stomach contents of anchovy (Engraulis encrasicolus, L., 1758), sampled with purse seine boats in Izmir Bay, during December 1996-December 1997, were examined. The fork length and the total weight of both sexes varied from 6.9-14.0 cm and from 2.54-21.48 g, respectively. The stomach contents have been investigated to define of the diet characteristics of the species for length groups and seasons. Volumetric and Numerical Analysis Methods have been used in order to determine of the data. Consequently, prey composition of the diet according to numerical existence did not vary during the year. While the Copepoda was the main compents, Cladocera and Bivalvia larvaes were the other important prey items.

Keywords:

Turkey, Aegean Sea, feeding behaviour, anchovies, feeding habits,

PDF

___

Anonymous. 2000. Fishery Statistics 2000, Turkish Prime Minister State Institute of Statistics, Ankara.

Arthur, D. K. 1976. "Food and feeding of larvae of three fishes occuring in the California current. Sardinops sagax, Engraulis mordax and Trachurus symetricus". Fishery Bulletin, Volume: 74, No:3, p. 517-530.

Capitanio, F. L., Pajaro, M. and Esnal, Graciela, B.E. 1997. Appendicularians (Chordata, Tunicata) in the diet of anchovy (Engraulis anchoita) in the Argentine Sea. SCI.MAR., 61 (1):9-15.

Chiappa-Carrara, X. and Gallardo-Cabello, M. 1993. Feeding behavior and dietary composition of the Northern anchovy, Engraulis mordax Girard (Pisces : Engraulidae) off Baja California, Mexico, Cienc. Mar. 19,285-305.

Coombs, S., Giovanardi, O., Conway, D., Manzueto, L., Halliday, N. and Barrett, C. 1997. The distribution of eggs and larvae of anchovy (Engraulis encrasicholus) in relation to hydrography and food availability in the outflow of the river Po. ACTA ADRIAT. 38 (1): 33-47.

Dulcic, J. 1997. Growth of anchovy, Engraulis encrasicolus, (L.), larvae in the Northern Adriatic Sea. Fisheries Research 31, 189-195.

Giraldez, A. and Abad, R. 1995. Aspect on the reproductive biology of the Western Mediterranean anchovy from the coast of Malaga (Alboran Sea). SCI.MAR., 59(1): 15-23

Gordina, A.D., Nikolsky, V.N., Niermann, U., Bingel, F. and Subbotin, A.A. 1997. New data on the morphological differences of anchovy eggs (Engraulis encrasicolus, L.) in the Black Sea. Fisheries Research, 31, 139-145.

Katağan, T., Kaya, M., Ergen, Z. and Önen, M. 1990. The feeding regime of red mullet Mullus barbatus Linnaeus, 1758 in Izmir Bay. Doğa-Tr. J. Zoology, 14 (2): 179-187.

Mater, S. 1979. Investigations on Morphology, Abundance, Distribution and Mortality of Pelagic Eggs and Larvae of Anchovy (Engraulis encrasicolus, L.) in İzmir Gulf (Turkey). Rapp. Comm. Int. Mer. Medit, 25/26,10.

Niermann, U., Bingel, F., Gorban, A., Gördina, A.D., Gücü, A., Kideys, A.E., Konsulov, A., Radu, G., Subbotin, A.A. and Zaika, V.E.., 1993. Distribution of Anchovy Eggs and Larvae (Engraulis encrasicolus Cuv.) in the Black Sea in 1991 and 1992 in Comparison to Former Surveys. ICES Statutory Meeting. CM1993/H:48.

Palomera, I., Morales-Nin, B. and Lleonart, J. 1988. Larval growth of anchovy, Engraulis encrasicolus, in the western Mediterranean Sea. Marine Biology 99, 283-291.

Pedro, R. 1994. Anchovy spawning in Mira Estuary (1985-1992). Nova Serie, Vol. II, n. 27, pp. 423-454.

Pertierra, J.P. 1987. Crecimiento del boqueron (Engraulis encrasicolus, L. 1758) (Pisces, Engraulidae) de la costa catalana (Mediterraneo noroccidental). Inv. Pesq. 51(2), pags. 263-275.

Plöunevez, S. and Champalbert, G. 2000. Diet, feeding behaviour and trophic activity of the (Engraulis encrasicolus L.) in the Gulf of Lions (Mediterranean Sea). Oceanologica Acta. Vol. 23,175-192.

Regner, S. i Dulcic, J. 1990. Growth parameters of anchovy post larvae in the Adriatic estimated from otolith growth rings. Institut za Oceanografiju i Ribarstvo-Split, SFR Jugoslavia, No. 76.

Sinovcic, G. 1998. Distribution of Juvenile anchovy Engraulis encrasicolus, (L.) in an estuarine habitat and influence of year-class strength on its catch value. Institut za Oceanografiju i Ribarstvo-Split, Hrvatska, N. 79.

Ünlüoğlu, A. 1995. Investigations of the Feeding Habits of Bogue (B. hoops, Lin. 1758), Horse mackerel (T. trachurus, Lin., 1758), Sardine (S. pilchardus, Walbaum 1792)and anchovy (E.encrasicholus, lin 1758)in izmir bay.Msc.Thesis.D.E.U., İnstitute of Marine Science and Tecnology.47 p.

Vucetic,T.1963 Some data on the spawning of anchovy(Engralusis encrasicolus,L.)intheopen Central and North Adriatic. Proc. Gen. Fish. Coun. Medit., 2:203-209.

Whitehead P.J.P., Bauchot, M.-L., Hureau, J.-C, Nielsen, J. & Tontonese, E. (Editors). 1986. Fishes of the North-Eastern Atlantic and the Mediterranean. In Belonidae. Volume II, pp. 517-1007, Paris UNESCO.

Whitehead P.J.P., Bauchot, M.-L., Hureau,J.-C, Nielsen, J. & Tontonese, E. (Editors). 1986. Fishes of the North-Eastern Atlantic and the Mediterranean. In Belonidae. Volume II, pp. 517-1007, Paris UNESCO.

Windell, J.T. and Bowen, H.S. 1978. Method for study of fish diets based on analysis of stomach contents. Quoted in "Methods for assesment of fish production in fresh waters". Ed. By. T. Benegal, 3 rd Edition IBP Handbook No:3.