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Growth and mortality of brown trout, Salmo trutta fario in Lar dam, Iran | ||
| Iranian Journal of Fisheries Sciences | ||
| مقاله 4، دوره 11، شماره 1، فروردین 2012، صفحه 47-37 اصل مقاله (508.96 K) | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2018.114183 | ||
| نویسندگان | ||
| H. Fazli* ؛ H. Azari؛ M. Moghim؛ D. Kor؛ E. Nabavi Jelodar؛ H. Taleshian | ||
| چکیده | ||
| The length-weight relationship, age, growth parameters, sex ratio, mortality and exploitation rate of Salmo trutta fario were determined in Lar dam. The sex ratio (male: female) was 1:1.84 which differed significantly from the expected 1:1. The length-weight regression was (females) and (males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L∞ = 45.0 cm, K = 0.27 yr-1, t0 = -0.23 yr. The instantaneous coefficients of natural, total and fishing mortality were estimated as 0.40 yr-1, 0.75 yr-1 and 0.35 yr-1. The results showed that S. trutta fario is moderately a rapidly-growing species in Lar dam. The exploitation rate was 0.47. Therefore, the population appeared to be in good condition in 2004. | ||
| کلیدواژه‌ها | ||
| Salmo trutta fario؛ Growth parameters؛ exploitation rate؛ Lar Dam | ||
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آمار تعداد مشاهده مقاله: 156 تعداد دریافت فایل اصل مقاله: 175 |
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