Orta Karadeniz Bölgesi’ndeki Bazı Akarsulardan Örneklenen Tatlısu Kefali (Squalius cephalus, L. 1758)’nin Otolit Özellikleri-Total Boy Arasındaki İlişkiler

Öz

Bu çalışmada Karadeniz Bölgesi’ndeki bazı içsularda yaşayan tatlısu kefalinin (Squalius cephalus, L.1758) total boy ile otolit özellikleri arasındaki ilişkiler araştırılmıştır. Tatlısu kefali örnekleri 4 farklı lokaliteden (Abdal Çayı, Akçay, Terme Çayı ve Yedikır Baraj Gölü) yakalanmıştır.  Otolit ölçümleri ile total boy arasındaki ilişkilerin hesaplanması için power model kullanılmıştır. İstatistiksel analizler Paired t-test, Independent t test, ANOVA ile test edilmiştir. Abdal, Akçay, Terme Çayı ve Yedikır Baraj Gölü’nden elde edilen bireylerin ortalama total boyları sırası ile 11,49±0,79 cm, 10,31±0,52 cm, 10,33±0,29 cm ve 11,11±0,33 cm arasında değişmektedir. Lokalitelere göre tüm veriler birlikte değerlendirildiğinde asteriskus ve lapillus otolitlerinin otolit enleri (OB) ve otolit boyları (OL) arasında bir farklılık bulunmamaktadır. Fakat dört lokalite birlikte değerlendirildiğinde lapillus otolit ağırlıkları arasında fark mevcuttur. Lokalitelere göre asteriskus otolit ağırlıkları bakımından bir farklılık mevcut değildir. TL ve OB, OL ile OW arasındaki ilişkiler power regresyon modeli kullanılarak belirlenmiştir. Terme (r² =0,936) ve Yedikır için   OW (r² =0,912), Akçay ve Abdal Çayları için OL (r² =0,973) değerlerinin TB ile en kuvvetli ilişkileri gösterdiği belirlenmiştir.

Anahtar Kelimeler

• Tatlısu kefali,otolit özellikleri,total boy,populasyon,Karadeniz

The Relationships Between Otolith Dimensions-Total Length of Chub (Squalius cephalus, L.1758) Sampled from Some Inland Waters of the Middle Black Sea Region

Abstract

In this study, the relationships between otolith dimensions and total length of chub (Squalius cephalus, L.1758) sampled from a few inland waters of Black Sea was researched. Chub samples were obtained from the four different localities (Abdal, Akçay, Terme and Yedikır). Power models were applied to estimate the relationships between the otolith measurements and total length (TL). Paired t-test, independent t test and ANOVA were done to test the data statistically. The average total length of individuals sampled from Abdal, Akçay and Terme Streams, Yedikır Dam Lake varies between 11.49 ± 0.79 cm, 10.31 ± 0.52 cm, 10.33 ± 0.29 cm and 11.11 ± 0.33 cm, respectively. When all the data were evaluated according to localities, it was found that there was no difference in terms of otolith breadth (OB) and otolith length (OL) for asteriscus and lapillus otoliths. There were differences in terms of otolith weight of lapillus in localities. There were no differences of asteriscus otolith weight of chub between localities. The relationships between TL and OB, OL and OW were determined using the power regression equation and best fit was obtained between TL and OW for Terme (r² =0.936) and Yedikır (r² =0.912), OL for Akçay and Abdal Streams (r²=0.973).

Keywords

• chub,otolith morphometrics,total length,population,Black Sea

Kaynakça

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