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    Growth and mortality of the Brown trout (Salmo trutta L.) population from upper Aksu stream, Northeastern Anatolia, Turkey
    (Turkish Journal of Zoology, 2007) Arslan, Murat; Yıldırım, Ayhan; Bektaş, Serdar; Atasever, Ali
    Age, sex, mortality, and growth characteristics of brown trout ( Salmo trutta ) from the upper Aksu Stream were investigated. Females and males comprised 52.13% and 47.87% of the population, respectively. Age ranged from 1 to 8. The fork length (L) and total weight (W) were 5.7-22.8 cm and 2.9-142.6 g, respectively. Length-weight relationships were W = 0.015 × L 2.939 , W = 0.015 × L 2.928 , and W = 0.015 × L 2.932 for females, males, and overall, respectively. The estimated von Bertalanffy growth parameters were L ? = 33.27 cm, K = 0.107 y -1 , and t 0 = –1.046 y for females; L ? = 29.50 cm, K = 0.143 y -1 , and t 0 = –0.562 y for males; and L ? = 32.13 cm, K = 0.124 y -1 , and t 0 = –0.724 y for overall. Phi prime ( ? `) was 2.09 for females, males, and overall. Instantaneous total mortality rate (Z) was 0.58 y -1 .
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     Length-weigth relationship of brown trout, (Salmo trutta), inhabiting Kan Stream, Çoruh Basin, Nort-Eastren Turkey
    (Turkish Journal of Fisheries and Aquatic Sciences, 2004) Arslan, Murat; Yıldırım, Ayhan; Bektaş, Serdar
    Length-weight and length-length, fork (FL), standard (SL) and total (TL) lengths, relationships were derived for brown trout, Salmo trutta L., inhabiting Kan Stream, Çoruh Basin, eastern Turkey. Sampling was done between January–December of 2001 using electronic fishing gear. The relationships between lengths were all significantly linear (p<0.01), the b value in the length-weight relationship for males and females did not deviate from 3, and this value was significantly lower than 3 in the winter (p<0.01), when the temporal changes were taken into account, indicating that only the sampling time affected the growth pattern of Salmo trutta . Growth was isometric in the spring, summer and fall, but it was negative and allometric in the winter.