Ice Processes Affect Habitat Use and Movements of Adult Cutthroat Trout and Brook Trout in a Wyoming Foothills Stream
Ice Processes Affect Habitat Use and Movements of Adult Cutthroat Trout and Brook Trout in a Wyoming Foothills Stream
复制标题
冰过程影响怀俄明州山麓溪流中成年切喉鳟鱼和溪鳟鱼的栖息地使用和运动
DOI：
10.1577/m03-223.1
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发表时间：
2004
影响因子：
1.1
通讯作者：
W. Hubert
中科院分区：
文献类型：
--
作者：
Jason W. Lindstrom;W. Hubert
摘要利用无线电遥测技术，对2002-2003年秋季至冬季25只克氏喉鳟和25只小鳟鱼的生境利用和活动情况进行了研究。通过定期测量研究河段30个水塘和5个加拿大海狸池塘的特征，评价了冬季生境条件的时间动态。三个地点的地下水输入使河道冬季日平均水温上升至0.2-0.6°C，下游至少250 m的河道无冰，但下游缺乏表面冰，导致池中出现冰和锚冰，鳟鱼的栖息地条件不稳定。不受地下水输入和海狸池影响的段池趋于稳定，积雪在冰面上积累。随着积雪的积累，整个研究范围内的水池变得更加稳定。割断的鳟鱼和小溪…
Abstract Habitat use and movements of 25 adult cutthroat trout Oncorhynchus clarkii and 25 adult brook trout Salvelinus fontinalis from fall through winter 2002–2003 were assessed by means of radiotelemetry in a 7-km reach of a Rocky Mountains foothills stream. Temporal dynamics of winter habitat conditions were evaluated by regularly measuring the features of 30 pools and 5 beaver Castor canadensis ponds in the study reach. Groundwater inputs at three locations raised mean daily water temperatures in the stream channel during winter to 0.2–0.6°C and kept at least 250 m of the downstream channel free of ice, but the lack of surface ice further downstream led to the occurrence of frazil ice and anchor ice in pools and unstable habitat conditions for trout. Pools in segments that were not affected by groundwater inputs and beaver ponds tended to be stable and snow accumulated on the surface ice. Pools throughout the study reach tended to become more stable as snow accumulated. Both cutthroat trout and brook...