Gülşah KURUCU, Derya BOSTANCI, Nazmi POLAT

Aşağı Melet Irmağı (Ordu, Türkiye)’nda Yaşayan Capoeta banarescui’nun Otolit Kütle Asimetrisinin Belirlenmesi

Asimetri, balığın vestibular ve işitsel fonksiyonları üzerinde önemli etkilere sebep olmaktadır fakat bu konuyla ilgili olarak sınırlı sayıda çalışma bulunmaktadır. Bu çalışmanın amacı, Ordu ili içme su kaynağı olarak da kullanılan Melet Irmağı’nda yayılış gösteren C. banarescui türünde, daha önceden belirlenmemiş olan, otolit kütle asimetrisi (x) ve mutlak otolit kütle asimetrisinin (|x|) belirlenmesidir. Balıkların total boyları ölçülmüş, asteriskus otolit çiftleri çıkarılarak 0,0001 hassasiyetle tartılmıştır. Otolit kütle simetrisi (x), mutlak otolit kütle asimetrisi (|x|) ve otolit kütle farkı (MR-ML) değerleri hesaplanarak, balık boyu ile x, |x| ve (MR-ML) arasındaki ilişkiler belirlenmiştir. C. banarescui bireylerinin sağ ve sol otolit ağırlıkları arasındaki fark, paired-t testine göre istatistiksel olarak önemsiz bulunmuştur (P>0,05). Ortalama x ve |x| değerleri -0,00803 ve 0,0855 olarak hesaplanmıştır. Total boy-x, total boy-|x| ve total boy-(MR-ML) arasındaki ilişkiler sırasıyla y=0,0011x+0,0434; y=0,0066x+0,1457 ve y=0,0000008x+0,00003 olarak tespit edilmiştir.

Anahtar Kelimeler:

Otolit kütle asimetrisi, Capoeta banarescui, Aşağı Melet Irmağı

Determination of Otolith Mass Asymmetry in Capoeta banarescui Inhabiting Lower Melet River (Ordu, Turkey)

Although asymmetry causes significant effects on the vestibular and auditory functions of the fish, there are a limited number of studies on this subject. The aim of this study is to determine the otolith mass asymmetry and absolute otolith mass asymmetry of the Capoeta banarescui inhabiting the Lower Melet River which is also used as drinking water source in Ordu province. Total lengths of fish samples were measured, asteriscus otolith pairs were removed and weighed to the nearest 0.0001. Otolith mass symmetry (x), absolute otolith mass asymmetry (|x|) and otolith mass difference (MR-ML) values are calculated and than the relationships between total length and x, |x| and (MR-ML) were determined. The difference between right and left otolith weights of C. banarescui samples was not statistically significant compared to paired-t test (P>0.05). x and |x| mean values were calculated as -0.00803 and 0.0855, respectively. Total length-x, total length-|x| and total length-(MR-ML) relationships were y=0.0011x+0.0434; y=0.0066x+0.1457 and y=0.0000008x+0.00003, respectively.

Keywords:

Otolith mass asymmetry, Capoeta banarescui, Lower Melet River,

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