Growth and mortality of brown trout, Salmo trutta fario in Lar dam, Iran

被引：0

作者：

Fazli, H. ^{[1
]}

Azari, H. ^{[1
]}

Moghim, M. ^{[1
]}

Kor, D. ^{[1
]}

Jelodar, Nabavi E. ^{[2
]}

Taleshian, H. ^{[1
]}

机构：

[1] Caspian Sea Ecol Res Ctr, Sari, Iran

[2] Iran Fisheries Org, Tehran, Iran

来源：

IRANIAN JOURNAL OF FISHERIES SCIENCES | 2012年 / 11卷 / 01期

关键词：

Salmo trutta fario; growth parameters; exploitation rate; Lar Dam; POPULATION; TRIBUTARY; STREAM;

D O I：

暂无

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

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 W = 0.028L(2.706) (females) and W = 0.0341L(2.624)(males) indicating a negative allometric growth for both sexes. Growth parameters were estimated as L-infinity = 45.0 cm, K = 0.27 yr(-1), t(0) = -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.

引用

页码：37 / 47

页数：11

共 32 条

[1]

Afraci M.A., 2000, IRANIAN SCI FISHERIE, V9, P21

[2] Reproductive biology of brown trout, Salmo trutta macrostigma Dumeril 1858, in a tributary of the Ceyhan River which flows into the eastern Mediterranean Sea [J].