Erdoğan Çiçek

Age and growth of the common guitarfish, Rhinobatos rhinobatos , in Iskenderun Bay (north-eastern Mediterranean, Turkey)

Age and growth of the common guitarfish (Rhinobatos rhinobatos) were estimated from the north-eastern Mediterranean coast of Turkey. A total of 115 common guitarfish (66 females and 49 males) were sampled. Age determinations were carried out using vertebral sections. Alcian blue dying techniques were used to enhance the visibility of the band on vertebrae. The techniques have been used for the first time on elasmobranchs vertebrae successfully in this study. A total of 97 vertebrae of 115 were visible on the vertebral band in this study. Male and female common guitarfish ranged in age from i to 15 and i to 24 y respectively. Total length ranged from 42 to 147 cm for females and 39 to 124 cm for males. The relationships between total length (TL) and total weight (TW) were presented as TW = 0.0054*TL 3.672 (R 2 = 0.98) for females, TW = 0.0012 *TL 3.1947 (R 2 = 0.98) for males and TW= 0.0012*TL 3.1915 (R 2 = 0.98) for both sexes. The parameters for von Bertalanffy growth curves were estimated as L inf = 137.70 + 9.38 cm, K = 0.159 + 0.047, to - 2.180 + 0.90 for pooled data.

Nevşehir İli Balık Faunası İçin Koruma ve İzleme Programı Önerileri

Bu calisma Nevsehir ili balik faunasinin belirlenmesi amaciyla Mayis-Eylul 2014 tarihleri arasinda gerceklestirilmistir. Elektrosoker ve uzatma aglari kullanilarak yapilan ornekleme calismalari sonucunda Cyprinidae, Cyprinodontidae, Cobitidae, Nemacheilidae ve Percidae familyalarina ait 13 takson ( Alburnus orontis , Aphanius marassantensis, Capoeta sieboldi , Capoeta tinca , Carassius gibelio , Carassius auratus , Cobitis simplicispina , Cyprinus carpio , Oxynoemacheilus angorae , Sander lucioperca , Seminemacheilus lendlii, Squalius cephalus ve Tinca tinca ) elde edilmistir. Daha once Kizilirmak’tan rapor edilmis olan Silurus glanis ve Luciobarbus escherichii , Damsa Baraj Golu’nde tespit edilmis olan Oreochromis niloticus ve Atherina boyeri turlerine ise arazi calismalari sirasinda rastlanmamistir. Elde edilen bu turler icerisinde 4 tanesinin Turkiye icin endemik, 6 tanesinin tasinmis ve 4 tanesinin ise genis dagilimli tur oldugu tespit edilmistir. Bu calismada yapilan gozlemler ve elde edilen verilere dayanarak ihtiyofaunal biyocesitliligin korunmasi ve iyilestirilmesi icin gerekli olan izleme onerilerine yer verilmistir.

Yüzeysel Sularda Su Kalitesinin Değerlendirmesi ve İzlenmesi için Biyolojik Bütünlük İndeksi: Balik İndekslerinin Kullanilmasi

Water is most important compounds in the world due to the main component of living and needed activities in all of life. Water is also an ideal living environment they spend a certain part or all of their life for some creatures. Today nearly billion people do not reach to a with clean drinking water and around 2.5 billion people have hygiene and sanitation problems of the water they use is in the world. Ensuring the sustainable use of renewable water resources, which is possible with the protection of the quality of not only the quantity. The importance of ecosystem quality assessment and monitoring the use of a biotic index is increasing day by day while the recent past. Fishes are considered as an important indicator organisms in this index. The use of biological indices in Turkey is still in its early stages indexes are used as biological elements of the fish is not yet implemented.