Seasonal stream habitat of adult Sakhalin taimen, Parahucho perryi, in the Bekanbeushi River system, eastern Hokkaido, Japan
Seasonal stream habitat of adult Sakhalin taimen, Parahucho perryi, in the Bekanbeushi River system, eastern Hokkaido, Japan
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日本北海道东部 Bekanbeushi 河系成年库页岛鲷 (Parahucho perryi) 的季节性溪流栖息地
DOI:
10.1111/j.1600-0633.2012.00585.x
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发表时间:
2012
影响因子:
1.8
通讯作者:
K. Miyashita
中科院分区:
文献类型:
--
作者:
Kentaro Honda;Haruka Kagiwada;N. Takahashi;K. Miyashita
Behavioural tracking of endangered adult Sakhalin taimen (Parahucho perryi) by acoustic telemetry was conducted in the Bekanbeushi River system that flows through eastern Hokkaido in 2008–2010. A total of 39 tracked P. perryi showed extensive use of the river system, both upstream and downstream, regardless of the month or year. No tracked adult P. perryi stayed in the ocean for more than 1 day. Some of the fish (20%) dwelled in upstream habitat consistently from spring to autumn, while 40% of individuals showed wide utilisation of the entire upstream and downstream systems. Although 39.4% of tracked fish utilised two or more primary tributaries to the main river, 6.1% used only the main river system. Distinct variability was observed between individuals based on the proportion of time spent in each stream reach (up-, mid-, and downstream). A trend was observed in 2008 and 2010 showing that tracked fish moved to the upper stream reaches when water temperatures downstream increased. This trend was not observed in 2009 when the summer water temperature downstream was more than 2 °C below average when compared to 2008 and 2010. Our results suggest that adult P. perryi in the Bekanbeushi River system exhibit high behavioural plasticity, that is, the fish can select habitats based on their own individual requirements. Our results also demonstrate the importance of physical continuity among river reaches both upstream and downstream such that P. perryi does not experience barriers in moving to optimal habitats.
DOI:
--
发表时间:
2011
期刊:
Fisheries Science(平成23年3月16日受理、onlineで公開)
影响因子:
--
作者:
SuzukiK.,OtakeT.;他4名
通讯作者:
他4名
DOI:
--
发表时间:
2004
期刊:
Ichthyological Research 51
影响因子:
--
作者:
Arai;T.et al.
通讯作者:
T.et al.
DOI:
--
发表时间:
2007
期刊:
Freshwater biology Vol.52/8
影响因子:
--
作者:
M. Han;M. Fukushima;S. Kameyama;T. Fukushima and B. Matsushita;M. Fukushima
通讯作者:
M. Fukushima