DERYA BOSTANCI, SERDAR YEDİER, SEDA KONTAŞ, Gülşah KURUCU, Nazmi POLAT

Türkiye'deki üç Atherina boyeri Risso, 1810 popülasyonunun total boy ile otolit boyutları arasındaki ilişkilerinin bölgesel varyasyonu

Bu çalışmada Türkiye'deki Atherina boyeri'nin üç popülasyonundaki (Eğirdir Gölü, İznik Gölü ve Hirfanlı Baraj Gölü) balıkların total boy-otolit ölçümleri; total boy-otolit indisleri ve otolit ölçümlerinin kendi aralarındaki ilişkileri tespit ederek popülasyonlar arasındaki farklılıkları belirlemeye odaklanılmıştır. Farklı üç bölgeden toplam 356 adet 41.0-103.6 mm total boyunda örnekler yakalanmış ve bu örneklerin sagittal otolitleri çıkarılıp ölçümleri yapılmıştır. Otolit boyu, genişliği ve ağırlığı farklı popülasyonlardaki balıkların boyu için iyi bir gösterge iken otolit genişliği bu üç popülasyon için en kuvvetli göstergedir. Bu üç popülasyondaki A. boyeri'nin total boyuyla otolit boyutları arasında doğrusal bir ilişki belirlendi. Ancak bu otolit boyutları arasındaki en iyi ilişki modeli popülasyon farklılıklarına göre değişebilmektedir. Üssel model Eğirdir Gölü popülasyonu için en iyi model iken doğrusal model İznik ve Hirfanlı Gölleri popülasyonları için en iyi model olarak belirlenmiştir.

Regional variation of relationship between total length and otolith sizes in the three Atherina boyeri Risso, 1810 populations, Turkey

This study focuses on the relationships between otolith measurements and total length; otolith shape indices and the total length; among otolith measurements for three Atherina boyeri populations (Lake Eğirdir, Lake İznik, and Hirfanlı Dam Lake) to determine regional variations of these populations in Turkey. 356 specimens with 41.0 - 103.6 mm total length of three A. boyeri populations were examined and their otoliths were extracted and measured. Otolith width is the strongest indicator for the three A. boyeri populations although the otolith length, width, and weight are good indicators for the fish length in the different populations. The linear relationship was determined between A. boyeri total length and sagittal otolith sizes in the three populations. However, the best model for the relationships among otolith sizes can be change depends on populations differentiation. Exponential model is the best model for Lake Eğirdir population while the linear model is the best model for Lake İznik and Hirfanlı Dam Lake populations.

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