- Atatürk Üniversitesi Ziraat Fakültesi Dergisi
- Vol: 7 Issue: 1
- ÇORUH VE ARAS HAVZASI ALABALIKLARI ÜZERİNDE BİYO-EKOLOJiK ARAŞTIRMALAR
ÇORUH VE ARAS HAVZASI ALABALIKLARI ÜZERİNDE BİYO-EKOLOJiK ARAŞTIRMALAR
Authors : Sıtkı Aras
Pages : 0-0
View : 7 | Download : 2
Publication Date : 2010-12-27
Article Type : Research
Abstract :ÖZE T Aras ve Çoruh havzası alabalıklarınm biyo ..ekulojilerini konu edilen bu araştırmada, bölgede bulunan alı?balık de'relerinin fiziki durumlarıyla birlikte besleme ka, sitele· ri ve ,balıkların büyüme hızları da biyometrikseı yollardan hesaplanmıştır. Ayrıca balıklarm toksonnmik dU5'uml&rma da kısaca yer ve'rilerek bu hususta literatürden aı çok far!<· lı neticele're varılmış bulunmaktadır. A BIO - ECOLOGICAL STUDY ON TROUT IN ARAS AND ÇORUH RIVERS BASINS Aras and Çoruh rivers are in the Eastern Black Sea Regions of Turkey respectively. The total rain - fall' area of both river basirıs ii approximately SO.OOO km2 • . The' for'lowing conclusions have been reached in this study: - Taxonomicaııy; aL Only Salmo trutta 1. trout variety has been found In bouth basins. b) in Çoruh Basin s.t. labrax and s. t. magrostigma sub - varieties (mostly the former) and their crossbred apacies have been found. c) In Aras Basin, s. t. caspius and s. t. magrobtigma subvarieties (mostly the former) have been found. 2 - Ecologically; Mor than 60 streams have been investigated in this study. Several characteristics such as the amount of water, temperature, and the sllope of the streamp beds have been examined. Condition factor K. which indicates the feeding capacity of the streams has been determined as 0,0129 for the area covered in this study. (weig~t and lenght were taken in gr. and cm. respectively in computing the K. faktor.) On the othı;ır hand, logaritmic regression equations that are used to indicate the feeding capasity of the streams, as weLL as the growth rates of fjsh by age have been determined and it has been found that the Çoruh River Basin is in betler conditiorı than the Aras Basin Regarding the growth rate of fish by age and the (b) value io the' logaritmic regression equations' The reason of this situation is that the elimate in Çoruh Basin is Milder, Therefore the conditions are betler for the fish in the basin to grow.Keywords :