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Abundance and Ecology of the Freshwater Fish in Trabzon Region

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Author(s): Bilal Kutrup

Journal: Pakistan Journal of Biological Sciences
ISSN 1028-8880

Volume: 3;
Issue: 4;
Start page: 623;
Date: 2000;
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ABSTRACT
In this study, the abundance of freshwater fish and relationship with certain ecological parameters of the Trabzon region were investigated. In addition, the migration ways of sea trout which is the marine form of Salmo trutta labrax were researched. When the sampling stations and number of the species are taken into consideration, Cyprinidae, known as white fish, are dominant especially at the middle and lower parts of streams. Salmo trutta labrax is dominant at the upper parts of the streams. In addition to Salmo trutta labrax, Barbus plebejus escherichi and Gohius eurycephalarges are often encountered at the upper parts of streams. Although Barbus plebajus escherichi has the highest number of individuals (20.50), Salmo trutta labrax has the highest % n (44.47) and % g (81.83) values. From twelve examined streams during this investigation, two sea trout specimens were only caught from Yanbolu and Sogutlu. All of the streams of this region are short and flow very rapidly. They relatively become smooth towards the sea. Haskoy station has the critical pH and O2 value due to domestic pollution. Except this station environmental parameters such as dissolved O2 , pH and conductivity were found optimal for Salmo trutta labrax.
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