İSMAİL BURAK DABAN, MUKADDER ARSLAN IHSANOGLU, Ali İşmen

Relationships between body size - otolith size for seven demersal fish species from the Marmara Sea, Turkey

The total length-otolith length (TL-OL), total length-otolith width (TL-OWi), total length-otolith weight (TL-OW) and total weight-otolith weight (TWOW) relationships of seven fishes in the Marmara Sea, Turkey were calculated. Measurements of sagittal otoliths (length, width and weight) and individuals (total length and total weight) from these species (Gaidropsarus biscayensis, Mediterranean bigeye rockling; Arnoglossus kessleri, Scaldback; Solea solea, Common sole; Uranoscopus scaber, Stargazer; Lophius budegassa, Blackbellied angler, Lepidorhombus boscii, The four-spot megrim and Lesueurigobius friesii, Fries's goby) were given. Linear regression analysis (y = bx + a) was used to determine the relationship between each morphometric character and the coefficient of determination (r2 ) were calculated. Highest determination coefficient were determined for L. budegassa and A. kessleri to TW-OW, for S. solea, and U. scaber to TL-OL, for G. biscayensis and L. boscii to TL-OWi, for L. friesii to TL-OW. The relatively lower determination coefficients were found for G. biscayensis, compared with others. These relationships provide vital information on species identification and size estimation of fish in predator-prey studies, we believe these results will be useful in future studies of stomach contents.

Marmara Denizi’nde dağılım gösteren yedi dip balığının vücut ölçüsü-otolit ölçüsü ilişkileri

Marmara Denizi’ndeki 7 balık türünde balık boyu-otolit boyu (TL-OL), balık boyu-otolit genişliği (TL-OWi), balık boyu-otolit ağırlığı (TL-OW) ve balık ağırlığıotolit ağırlığı (TW-OW) ilişkileri hesaplanmıştır. Bu türlere ait (Gaidropsarus biscayensis, Uzun Gelincik; Arnoglossus kessleri, Pisi Balığı; Solea solea, Dil Balığı; Uranoscopus scaber, Tiryaki; Lophius budegassa, Fener Balığı; Lepidorhombus boscii, Kancaağız Pisi ve Lesueurigobius friesii, Kaya Balığı) balık ölçümleri (boy ve ağırlık) ve otolit ölçümleri (boy, genişlik ve ağırlık) verilmiştir. Her bir morfolojik karakteristiğin arasındaki ilişkilerin tespitinde Doğrusal regresyon analizi (y = bx + a) kullanılmış ve determinasyon katsayısı (r2 ) hesaplanmıştır. En yüksek determinasyon katsayısı L. budegassa ve A. kessleri için TW-OW, S. solea, ve U. scaber için TL-OL, G. biscayensis ve L. boscii için TL-OWi, L. friesii için TL-OW ilişkilerinde hesaplanmıştır. Diğer türlerle karşılaştırıldığında, G. biscayensis için oldukça düşük determinasyon katsayıları bulunmuştur. Bu ilişkiler balıkların av-avcı ilişkileri çalışmalarında tür tayini ve av boyu tahmininde önemli bilgiler sunduğundan, gelecekte gerçekleştirilecek mide içeriği çalışmaları açısından katkı sağlayacağını düşünmekteyiz.

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