Sakarya Nehri’nin Kirmir Çayı’ndaki Balık Populasyonlarının Yoğunluğu ve Biyoması

Bu çalışmada, İç Anadolu Bölgesi’ndeki Sakarya Nehri’nin Kirmir Çayı’nda balık türlerinin yoğunluk ve biyomas değerlerini tahmin etmek için üç avlı ayrılmaya dayalı metot kullanılmıştır. 1.5256 ha’lık alanda örnekleme yapılmış ve Şubat 2007-Kasım 2007 tarihleri arasında 4167 adet balık elektroşok metoduyla avlanmıştır. Elde edilen örneklemelerde 2 familyaya Cyprinidae ve Cobitidae ait 9 balık türü tatlısu kefali Leuciscus cephalus Linnaeus, 1758 , bıyıklı balık Barbus plebejus escherichi Heckel, 1843 , siraz balığı Capoeta tinca Heckel, 1843 , inci balığı Alburnoides bipunctatus Bloch, 1782 , saçaklı siraz Capoeta capoeta sieboldi Steindachner, 1864 , karaburun Chondrostoma regium Heckel, 1843 , anadolu inci balığı Alburnus orontis Sauvage, 1882 , taş ısıran balığı Cobitis taenia Linnaeus, 1758 ve çöpcü balığı Nemachelius angorae Steindachner, 1897 avlanmıştır. A. orontis toplam populasyon içerisinde 1199 birey ve % 28.77 ile en yoğun türdür ve bu türü sırasıyla C. tinca 1173 birey ve % 28.15 , B. p. escherichi 584 birey ve % 14.01 , L. cephalus 454 birey ve % 10.90 , A. bipunctatus 322 birey ve % 7.73 , C. regium 245 birey ve % 5.88 , N. angorae 107 birey ve % 2.57 C. c. sieboldi 65 birey ve % 1.56 and C. taenia 18 birey ve % 0.43 takip etmiştir. Yoğunluk ve biyomas değerleri sırasıyla Şubat 2007’de; 11456 adet ha-1 ve 346.78 kg ha-1, Mayıs 2007’de; 8982 adet ha-1 ve 279.82 kg ha-1, Ağustos 2007’de; 6320 adet ha-1 ve 251.52 kg ha-1 ve Kasım 2007’de; 2887 adet ha-1 ve 168.87 kg ha-1 olarak tahmin edilmiştir. En düşük yoğunluk ve biyomas değerleri Kasım 2007’de gözlenmiştir.

Anahtar Kelimeler:

Yoğunluk, Biyomas, Elektrikle avcılık, Kirmir çayı, Ankara, Türkiye

Density and Biomass of Fish Populations in Kirmir Stream of Sakarya River, Turkey

In this study, Zippin’s triple-catch removal method was used to estimate density and biomass of fish species in Kirmir Stream of Sakarya River, Central Anatolia Turkey. A total area of 1.5256 ha was sampled and 4167 fishes were caught using electrofishing between February 2007 and November 2007. A total of 9 fish species representing 2 families Cyprinidae and Cobitidae were recorded. Fish species identified are as follows: Chub Leuciscus cephalus Linnaeus, 1758 , barbel Barbus plebelejus escherichi Heckel, 1843 , Capoeta tinca Heckel, 1843, spirlin Alburnoides bipunctatus Bloch, 1782 , Capoeta capoeta sieboldi Steindachner, 1864, tirgis-nase Chondrostoma regium Heckel, 1843 , bleak Alburnus orontis Sauvage, 1882 , spined-loach Cobitis taenia Linnaeus, 1758 and angora-loach Noemacheilus angorae Steindachner, 1897 . A. orontis was the most dominant species, constituting 1199 fish and 28.77% of the total fishes, followed by C. tinca 1173 fish and 28.15% , B. p. escherichi 584 fish and 14.01% , L. cephalus 454 fish and 10.90% , A. bipunctatus 322 fish and 7.73% , C. regium 245 fish and 5.88 % , N. angorae 107 fish and 2.57% C. c. sieboldi 65 fish and 1.56% and C. taenia 18 fish and 0.43% . The density and biomass values were estimated as 11456 fish ha-1 and 346.78 kg ha-1 in February 2007, 8982 fish ha-1 and279.82 kg ha-1 in May 2007, 6320 fish ha-1 and 251.52 kg ha-1 in August 2007 and 2887 fish ha-1 and 168.87 kg ha-1 in November 2007, respectively. The lowest density and biomass values were observed in November 2007

Keywords:

Density, Biomass, Electrofishing, Kirmir stream, Ankara, Turkey,

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