A preliminary study on growth parameters and mortality rates of the barbel (Barbus tauricus escherichi Steindachner, 1897) in Yeşildere Stream, Rize, Turkey
Growth parameters and mortality rates of the Barbus tauricus escherichi population inhabiting in Yeşildere Stream were investigated. In particular, age and size distributions, asymptotic growth, and mortality rates by age group classes were estimated. A total of 304 B. t. escherichi specimens were s...
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Veröffentlicht in: | Turkish Journal of Zoology (Turkey) 2007, Vol.31 (4), p.295-300 |
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Zusammenfassung: | Growth parameters and mortality rates of the Barbus tauricus escherichi population inhabiting in Yeşildere Stream were investigated. In particular, age and size distributions, asymptotic growth, and mortality rates by age group classes were estimated. A total of 304 B. t. escherichi specimens were sampled between June 2001 and July 2002. The population consisted of 5 age classes (i.e. 0 to IV) with minimum and maximum sizes of 5 cm to 23 cm in total length. The mean growth parameters were determined as L∞ = 26.63 cm, K = 0.274, and t0 = -1.009 with the scale method and as L∞ = 27.11 cm, K = 0.267, t0 = -1.117, and Z = 1.06 with the Bhattacharya method.
Bu araştımada Yeşildere'de yaşayan Barbus tauricus escherichi (Bıyıklı Balık) populasyonunun bazı büyüme parametreleri ve ölüm oranları incelendi. Araştırma bölgesinden Haziran 2001-Temmuz 2002 yılları arasında toplam 304 adet balık yakalandı. Yakalanan bireylerin boyları en küçük 5 cm ve en büyük 23 cm, yaşları ise 0-IV arasında dağılım göstermektedir. Yaş tayini Bhattacharya ve pul yöntemleriyle yapılmıştır. Pullara göre büyüme parametreleri; L∞ = 26,63 cm, K = 0,274, t0 = -1,009, Bhattacharya'ya göre; büyüme parametreleri ve mortalite ise L∞ = 27,11 cm, K = 0,267, t0 = -1,117, Z = 1,06 olarak belirlenmiştir. |
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ISSN: | 1303-6114 1300-0179 |