The Age, Growth, and Feeding Habits of the Whitefish, Coregonus Clupeaformis (Mitchell), of Lake Champlain
作者:
John Van Oosten,
HilaryJ. Deason,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1939)
卷期:
Volume 68,
issue 1
页码: 152-162
ISSN:0002-8487
年代: 1939
DOI:10.1577/1548-8659(1938)68[152:TAGAFH]2.0.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
This study is based on 120 whitefish collected in northern Lake Champlain (Missisquoi Bay) in 1930 and on 175 whitefish taken in southern Lake Champlain in 1931. Since the whitefish population had not been exploited commercially after 1912 in United States waters and after 1915 in Canadian waters, its study should be of interest in showing the characteristics of a population practically untouched by man. Data have been presented on length frequencies, age composition, growth, coefficient of condition, sex ratio, standard length-total length relationship, and feeding habits. The data indicated that the Missisquoi Bay population was disturbed (probably by the early fall seining of 1930) before our samples were taken so that the original length distributions no longer existed. The southern Lake Champlain material, however, showed a consistency which indicated that the population had not been exploited to any extensive degree, if at all. When the northern population was compared with the southern the former was found to differ from the latter in the following respects, which differences pointed to some disturbance of the northern stock in the lake
点击下载:
PDF (507KB)
返 回