Daytime Responses of Brown Trout (Salmo trutta) to Cover Stimuli in Stream Channels
作者:
PhilipW. Devore,
RayJ. White,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1978)
卷期:
Volume 107,
issue 6
页码: 763-771
ISSN:0002-8487
年代: 1978
DOI:10.1577/1548-8659(1978)107<763:DROBTS>2.0.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Experiments were conducted to identify stimuli to which stream-dwelling brown trout responded in selecting concealment or “cover.” The trout were 25-30 cm in total length. In each experiment, a group of five trout had choice of two types of cover in a channel 27 m long and 3.4 m wide with water 20-30 cm deep, flowing 22-37 cm/s. The fish preferred overhead cover 10 cm rather than 15 or 20 cm above streambed (P < 0.001), as well as cover with tactual features (P < 0.03). There was no apprent increased response to overhead cover that offered added visual reference features or lateral concealment.
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