INHIBITION OF SMOLTING IN PRECOCIOUS MALE CHINOOK SALMON, ONCORHYNCHUS-TSHAWYTSCHA

被引：36

作者：

FOOTE, CJ ^{[1
]}

CLARKE, WC ^{[1
]}

BLACKBURN, J ^{[1
]}

机构：

[1] FISHERIES & OCEANS CANADA,FISHERIES RES BRANCH,PACIFIC BIOL STN,NANAIMO V9R 5K6,BC,CANADA

来源：

CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE | 1991年 / 69卷 / 07期

关键词：

D O I：

10.1139/z91-255

中图分类号：

Q95 [动物学];

学科分类号：

071002 ;

摘要：

The ontogeny of precocious maturation in chinook salmon from Nicola River, British Columbia, was examined in conjunction with the effects of such maturation on smoltification and growth. A high proportion (56%) of male parr matured as yearlings. The growth patterns of precocious males and nonmaturing individuals of both sexes differed significantly. Precocious males appeared to grow rapidly relative to nonmaturing individuals in the early spring, but thereafter displayed a decreasing specific growth rate. In addition, precocious individuals gained more weight per increment of body length than nonmaturing individuals. The seawater adaptability of precocious individuals was lower than that of nonmaturing individuals at the three monthly sampling periods and decreased steadily as maturation proceeded.

引用

页码：1848 / 1852

页数：5

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