LARGE-SCALE ESCAPES OF FARMED ATLANTIC SALMON (SALMO-SALAR) INTO NORWEGIAN RIVERS THREATEN NATURAL-POPULATIONS

被引：112

作者：

GAUSEN, D ^{[1
]}

MOEN, V ^{[1
]}

机构：

[1] NORWEGIAN INST NAT RES,N-7004 TRONDHEIM,NORWAY

来源：

CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES | 1991年 / 48卷 / 03期

关键词：

D O I：

10.1139/f91-055

中图分类号：

S9 [水产、渔业];

学科分类号：

0908 ;

摘要：

We present data on Atlantic salmon (Salmo salar) which show that escaped farmed salmon enter Norwegian rivers in great numbers. Escaped farmed salmon comprised a substantial proportion of the mature salmon present on the spawning grounds in autumn. A potential for large-scale genetic introgression thus exists. The sex ratios, length distributions, and times of ascent of wild and farmed salmon differed significantly, reflecting major variations in biology and behavior. High proportions of farmed salmon (> 20%) were found only in rivers having fish farms situated closer than 20 km from the outlet.

引用

页码：426 / 428

页数：3

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