Karadeniz’de İstavrit (Trachurus mediterraneus Steindachner, 1868) Balığı Otolitlerinin Yaş, Bazı Halka Karakterleri ve Morfometrik Analizleri

Yıl 2015, , 3 - 12, 05.01.2016

Elvan Atılgan

https://doi.org/10.17693/yunusae.v15i21958.235748

Öz

Bu çalışmada Karadeniz için önemli bir tür olan istavrit (Trachurus mediterraneus) balığında farklı yaşlara sahip (0-5 yaş) otolitlere örnekler verilerek, türün otolit morfolojisi ve bazı halka yapısı özellikleri irdelenmiştir. Ordu-Rize arası ticari avcılığın yoğun olarak yapıldığı bölgelerden elde edilen örneklerden sağlanan 4265 adet otolit üzerinde çalışma gerçekleştirilmiştir. Otolitlerde şekil analizleri yapılarak F_F, R_D, A_R değerleri hesaplanmıştır. Morfolojik özelliklerine göre 4 farklı otolit tipi kaydedilmiştir. Nispeten yorumlanması güç bir otolit yapısına sahip olan istavrit de yaş tahmini çalışmalarında dikkat edilmesi gereken yalancı halka, larval dönem halkaları ve benzer oluşumlar belirlenmiştir. Bunun yanı sıra farklı tipte otolitler ve yapısal bozukluk gösteren bazı otolitler fotoğraflarla sunulmuştur.

Anahtar Kelimeler

İstavrit, otolit, Trachurus mediterraneus, Karadeniz

Age and Some Ring Characteristics and Morphometric Analyses of Mediterranean Horse Mackerel’s Otoliths (Trachurus mediterraneus Steindachner, 1868) in The Black Sea

Öz

Anahtar Kelimeler: İstavrit, otolit, Trachurus mediterraneus, Karadeniz

 

Mediterranean Horse Mackerel (Trachurus mediterraneus), one of the important species for Black Sea, was investigated in order to illustrate different aged otoliths’ (0-5) morphology and some ring characters. This research was carried out with 4265 otoliths which were sampled from the regions have an intensive commercial fishing between Ordu and Rize. It was conducted otolith shape analyses F_F, R_D, A_R. Four different otolith types according to their morphological features were fixed. Mediterranean Horse Mackerel has a complicated otolith structure that is relatively difficult to interpret the age, for this reason false ring, larval stage rings and similar formations were considered. Besides, different type of otoliths and some structural defected ones were presented with photographs.

 

Anahtar Kelimeler

Mediterranean horse mackerel, otolith, Trachurus mediterraneus, Black Sea

Kaynakça

• Aleev Yu, G. 1957. Horse mackerel (Trachurus) of the Soviet seas. Tr. Sevastopol. Biol. St., 9: 167 – 212. (in Russian).
• Aleev Yu, G. 1959. On the reproduction of the southern population of the horse mackerel in the western areas of Black Sea.Tr. Sevastopol.Biol. St., 12: 270-285. (in Russian).
• Polat, N. 2000. Balıklarda yaş belirlemenin önemi. IV. Ulusal Su Ürünleri Sempozyumu, 28-30 Haziran, Erzurum, 9-20.
• Erkoyuncu, İ. 1995. Balıkçılık Biyolojisi ve Populasyon Dinamiği. Ondokuz Mayıs Üniversitesi Yayınları, Sinop, 265 s.
• Ambrose, J. 1989. Age Determination. Fisheries Techniques. American Fisheries Society. Blacksburg, Virginia, 301-324.
• Borges, M.F. 1989. Results of the horse mackerel (Trachurus trachurus L.) otolith exchange programme during 1988-89. ICES, C.M./H 13, 10 pp.
• Chugunova, N.I. 1963. Age and Growth Studies in Fish, Israel Program Scientific Translation. No: 610 National Science Foundation, Washington D.C. 132 pp.
• Karlou Riga, C. 2000. Otolith morphology and age and growth of (Trachurus mediterraneus Steindachner, 1868) in the Eastern Mediterranean. Fish. Res., 46, 69-82.
• Marecos, M.L. 1986. Preliminary analysis of horse mackerel (Trachurus trachurus L.1 otolith (L,) measurements. ICES, C.M./H 72, I pp.
• Waldron. M.E. ve Kerstan, M. 2001. Age validation in Mediterranean Horse Mackerel (Trachurus trachurus ) otoliths. ICES J. Mar. Sci., 58, 806-813.
• Bostancı, D. ve Polat, N. 2008. Balıkların yaş tayininde kullanılan kemiksi yapılardaki halka özellikleri. Journal of Fisheries Science, 2(2), 107-113.
• Wysokinski, A. 1985. Mediterranean Horse Mackerel age determination using otoliths. Collect. Sci. Pap. ICSEAF 12 (2), 199-203.
• ICSEAF, 1986. ICSEAF otolith interpretation guide No: 2. Cape horse mackerel. Madrid, 24 pp.
• ICES, 1991. Report of the horse mackerel (scad) otolith reading workshop. ICES, C.M./H 59, 59 pp.
• Kerstan, M. 1985. Age, growth, maturity and mortality estimates of horse mackerel (Trachurus trachurus) from the waters of Great Britain and Ireland in 1984. Arch. Fischwiss. 36 (1/2), 115-154.
• Eltink, A. ve Kuiter, C.J. 1989. Validation of ageing techniques on otoliths of horse mackerel (Trachurus trachurus L.). ICES, CM/H 43, 15 pp.
• Karlou-Riga, C. ve Sinis, A. 1997. Age and growth of horse mackerel (Trachurus trachurus L.) in the Gulf of Saronikos (Greece). Fish. Res. 32, 157-171.
• Eltink, A. 1985. Results of horse mackerel (Trachurus trachurus L.) otolith exchange program. ICES, C.M./H 40, 17 pp.
• Cottrell, P. E., Trites A. W. ve Miller, E.H. 1996. Assessing the use of hard parts in faeces to identify harbour seal prey: results of captive feeding trials. Can. J. Zool. 74: 875-880.
• Gauldie, R.W. 1994. The morphological basis of fish age estimation methods based on the otolith of Nemadactylus macropterus. Can. J. Fish. Aquat Sei. 51: 2341-2362.
• Labeelund, J.H. I988. Otolith shape discriminates between juvenile Atlantic salmon. Salmo salar L., and brown trout. Salmo truttta L. J. Fish. Biol. 33: 899-903.
• Ponton, D. 2006. Is Geometric Morphometrics Efficient for Comparing Otolith Shape of Different Fish Species? J. Morphol. 267: 750-757.
• Tuset, V.M., Lozano, I.J., González, J.A., Pertusa, J.F. ve Garcia-Diaz, M.M. 2003. Shape indices to identify regional differences in otolith morphology of comber, Serranus cabrilla (L.. 1758). J. Appl. Ichthyol. 19: 88-93.
• Yoshinaga, J., Nakama, A., Morita, M. ve Edmonds, J.S. 2000. Fish otolith reference material for quality assurance of chemical analyses. Mar. Chem. 69: 91-97.