Ceyhan Havzası Planiliza abu (Heckel, 1843) Populasyonuna Ait Bazı Populasyon Parametrelerinin Belirlenmesi

Bu çalışma Ağustos 2014, Mayıs ve Temmuz 2015 tarihlerinden Ceyhan Havzasında yer alan Azaplı Gölü ve Kartalya Barajındaki Planiliza abu populasyonuna ait parametrelerin belirlenmesi amacıyla yapılmıştır. Örneklenen 370 bireyin yaşlarının 0 ile VI. yaş grupları arasında değişim gösterdiği ve baskın olan yaş grubunun III. yaş grubu (%30,81) olduğu belirlenmiştir, Çalışmada kullanılan bireylerin 4,0-23,1 cm total boya ve 1,06-160,10g total ağırlığa sahip oldukları belirlenmiş olup ortalama boy ve ağırlık değerleri ise sırasıyla 14,17±3,11 cm ve 39,49±24,95 g olarak hesaplanmıştır. Boy-ağırlık ilişkisi W=0,0114L3,022 ve bazı populasyon parametreleri ise L?: 27,87 cm, k: 0,189 yıl-1, to: -1,09 yıl, ??: 2,89 ve K: 1,13 olarak tahmin edilmiştir. Ölüm oranları ve sömürülme düzeyi ise Z: 0,40, M: 0,33, F: 0,07 ve E: 0,17 olarak hesaplanmış olup bu veriler ışığında populasyon üzerinde herhangi bir av baskısının söz konusu olmadığı ortaya çıkmaktadır

Determination of Some Population Dynamical Parameters of Planiliza abu (Heckel, 1843) from Ceyhan River Basin

This study was carried out in order to determine population parameters of Planiliza abu in August 2014, May and July 2015 in Azaplı Lake and Kartalkaya Dam Lake, Ceyhan River Basin. A total of 370 specimens were analyzed. Age of the specimens ranged from 0 to VI. age groups and dominant age group was III (30.81%). Total length varied from 4.0-23.1 cm with the mean of 14.17±3.11 cm and total weight ranged from 1.06 to 160.10 with the mean of 39.49±24.95 g. Length-weight relationship were estimated W=0.0114L3.022. Estimated population parameters were calculated as L∞: 27.87 cm, k: 0.189 year-1, to: -1.09 year, Φꞌ: 2.89 and K: 1.13 for the population. Mortality and exploitation rates were also estimated as Z: 0.40, M: 0.33, F: 0.07 and E: 0.17, respectively. In the light of these values there were no over fishing pressure on the population

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