Akın Türker İLKYAZ, Ozan SOYKAN, Hasan Tuncay KINACIGİL, Gülnur METİN

Age, growth and reproduction of four-spotted goby, Deltentosteus quadrimaculatus (Valenciennes, 1837), in İzmir Bay (central Aegean Sea)

Bu çalışmada, İzmir Körfezi’ndeki dört benekli kayabalığının boy dağılımı, cinsiyet oranı, boy-ağırlık ilişkisi, yaş, büyüme, yumurtlama dönemi, ilk eşeysel olgunluk yaşı ve boyu araştırılmıştır. Temmuz 2004 ile Haziran 2007 tarihleri arasında İzmir Körfezi’nde yapılan trol çekimleri ile 1696 adet dört benekli kayabalığı elde edilmiştir. Örneklerin total boyları 3,1 ile 9,2 cm arasında değişmiştir. Elde edilen örneklerin % 31,1’inin dişi, % 27,7’sinin erkek ve % 41,2’sinin eşeysel olgunluğa erişmemiş genç bireylerden oluştuğu ve stoğa ait eşey oranının 1:0,89 olduğu tespit edilmiştir. Örneklerin yaş kompozisyonunun 1 ile 5 yaşları arasında değişim gösterdiği tespit edilmiştir. Tüm bireyler için boy-ağırlık ilişkisi W = 0,0036L3,45 ve von Bertalanff y büyüme eşitliği Lt = 10,29[1 – e–0,371(t + 0,502)] olarak bulunmuştur. Yumurtlama döneminin Şubat’ta başladığı ve Mayıs’a kadar devam ettiği belirlenmiştir. İlk üreme boyu dişilerde 6,15 ± 0,18, erkeklerde ise 6,38 ± 0,20 cm olarak hesaplanmıştır.

İzmir Körfezi (Orta Ege Denizi) dört benekli kayabalığı’nın, Deltentosteus quadrimaculatus (Valenciennes, 1837), yaş, büyüme ve üreme özellikleri

Length distribution, sex ratio, length-weight relationship, age, growth, spawning period, age, and length at first maturity of four-spotted goby inhabiting İzmir Bay were investigated. A total of 1696 four-spotted goby were collected by trawl hauls between July 2004 and June 2007. The size of the fi sh sampled ranged from 3.1 to 9.2 cm total length. The samples were composed of 31.1% females, 27.7% males, and 41.2% juvenile individuals, with a female to male ratio of 1:0.89. The age of the fish ranged from 1 to 5 years. The length-weight relationship and the von Bertalanff y growth function were estimated for all individuals as: W = 0.0036L3.45 and Lt = 10.29[1 – e–0.371(t + 0.502)]. Spawning period started in February and continued until May. The lengths at first maturity of females and males were 6.15 ± 0.18 and 6.38 ± 0.20 cm total length, respectively.

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Ahnelt, H. and Scattolin, G. 2005. Th e pattern of the mechanosensory lateral line on the caudal fi n of the two deep-water gobiid fi shes Deltentosteus collonianus and Deltentosteus quadrimaculatus (Teleostei: Gobiidae). J. Natural History 39: 4127-4135.
Bell, J.D. and Harmelin-Vivien, M.L. 1983. Fish fauna of French Mediterranean Posidonia oceanica seagrass meadows. 2. Feeding habits. Tethys 11: 1-14.
Casadevall, M., Matallanas, J. and Bartolí, T. 1994. Feeding habits of Ophichthus rufus (Anguilliformes, Ophichthidae) in the western Mediterranean. Cybium 18: 431-440.
Froese, R. and Pauly, D. 2009. FishBase version (10/2009). World Wide Web electronic publication. http://www.fi shbase.org (January 2010).
Gunderson, D.R. 1993. Surveys of fi sheries resources. John Wiley and Sons, New York.
İlkyaz, A.T., Metin, C. and Kınacıgil, H.T. 1998. A computer program about the calculation of the selectivity parameters in towed fi shing gear illustrated with cover cod-end method (L50 Version: 1.0.0). Jour nal of Fisheries and Aquatic Science 15: 305-314.
Joyeux, J.C., Bouchereau, J.L. and Tomasini, J.A. 1991. Croissance et structure démographique de la population de Gobius niger Linné, 1758 (poisson, Téléostéen) dans une lagune nordméditerranéenne. Cahiers de Biologie Marine 32: 415-437.
King, M. 1996. Fisheries Biology Assessment and Management. Fishing News Books, England.
Kovačić, M. 2001. Th e biology of Roule’s goby in the Kvarner area, northern Adriatic Sea. J. Fish Biology 59: 795-809.
Labropoulou, M. and Markakis, G. 1998. Morphological-dietary relationships within two assemblages of marine demersal fi shes. Environmental Biology of Fishes 51: 309-319.
Lamprakis, M.K., Kallianiotis, A.A., Moutopoulos, D.K. and Stergiou, K.I. 2003. Weight-length relationships of ishes discarded by trawlers in the North Aegean Sea. Acta Ichthyologica et Piscatoria XXXIII (2): 145-151.
Lindström, K. and Hellström, M. 1993. Male size and parental care in the sand goby, Pomatoschistus minutus. Ethol. Ecol. Evol. 5: 97-106.
Machias, A., Vassilopoulou, V., Vatsos, D., Bekas, P., Kallianiotis, A., Papaconstantinou, C. and Timenides, N. 2001. Bottom Trawl discards in the northeastern Mediterranean Sea. Fish. Res. 53: 181-195.
Mata, A.J., Morales, J and Marquez, L. 2008. Weight-length relationships for 26 demersal fi sh species of the Spanish South- Atlantic coastal waters. J. Appl. Ichthyol. 24: 330-333.
Merella, P., Quetglas, A., Alemany F. and Carbonell, A. 1997. Lengthweight relationship of fi shes and cephalopods from the Balearic Islands (western Mediterranean). Naga ICLARM Q. 20: 66-68.
Miller, P. J. 1984. Th e tokology of gobiid fishes. In: Fish Reproduction, Strategies and Tactics (ed. G.W. Potts and R.J. Wootton), Academic Press, London, pp. 119-153.
Miller, P.J. 1986 Gobiidae. In: Fishes of the North-eastern Atlantic and the Mediterranean Vol 3 (ed. P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese), UNESCO, Paris, pp. 1019-1085.
Morey G., Moranta, J., Massutí, E., Grau A., Linde, M., Riera, F. and Morales-Nin, B. 2003. Weight-length relationships of littoral to lower slope fi shes from the western Mediterranean. Fish. Res. 62: 89-96.
Morte, M.S., Redon, M.J. and Sanz-Brau, A. 1997. Trophic relationships between two gurnards Trigla lucerna and Aspitrigla obscura from the western Mediterranean. J. Mar. Biol. 77: 527-537.
Morte, M.S., Redon, M.J. and Sanz-Brau, A. 1999. Feeding ecology of two megrims Lepidorhombus boscii and Lepidorhombus whiffi agonis in the western Mediterranean (Gulf of Valencia, Spain). J. Mar. Biol. 79: 161-169.
Mytilineou, C., Politou, C.-Y., Papaconstantinou, C., Kavadas, S., D’Onghia, G. and Sion, L. 2005. Deep-water fi sh fauna in the eastern Ionian Sea. Belg. J. Zool. 135: 229-233.
Nikolsky, G.W. 1963. Th e Ecology of Fishes (Translated by L. Birkett). Academic Press. London and New York.
Pauly, D. and Munro, J.L. 1984. Once more on growth comparison in fi sh and invertebrates. ICLARM, Fishbyte 2:21-21.
Ricker, W.E. 1973. Linear regressions in fishery research. Fish. Res. Board Can. 30: 409-434.
Ricker, W.E. 1975. Computation and interpretation of biological statistics of fi sh populations. Bull. Fish. Res. Board Can. 191: 1-382.
Sasal, P., Faliex, E. and Morand, S. 1996. Population structure of Gobius bucchichi in a Mediterranean marine reserve and in unprotected area. J. Fish Biology 49: 352-356.
Sparre, P. and Venema, S.C. 1998. Introduction to tropical fi sh stock assessment - Part 1: Manual, 306/1, Rev. 2. FAO Fish. Tech. Pap. Rome.
Tito de Morais, L. and Bodiou, J.Y. 1984. Predation on meiofauna by juvenile fish in a western Mediterranean fl atfi sh nursery ground. Marine Biology 82: 209-215.