open access

https://hdl.handle.net/2115/50368

Riverine environmental characteristics and seasonal habitat use by adult Sakhalin taimen Hucho perryi

英語

Seasonal habitat

2010-11

Blackwell Publishing

Journal of Fish Biology

77(7)

1526-1541

The study identified seasonal habitat use by endangered adult Sakhalin taimen, Hucho perryi and the environmental characteristics of their habitats (water depth, amount of riparian forest, and meandering sinuosity). Fifteen adult H. perryi with acoustic tags were tracked by towing an acoustic receiver with a canoe in the Bekanbeushi River system in eastern Hokkaido Island, Japan during each month from late April to late November 2008. Individuals mainly used midstream (shallower than downstream) habitats in all seasons. These locations were generally characterized by relatively dense riparian forests and high sinuosity, indicating the presence of pools. In spring, individuals used habitats with less riparian forest cover compared to mean value of the river channel. From spring to autumn, adult H. perryi selected limnologically complex habitats with meandering channels. From summer to autumn, individuals selected habitats with more riparian forest cover. The inverse relationship between H. perryi detection and riparian forest area in spring was a result of seasonal defoliation in deciduous riparian forests.

学術雑誌論文

Accepted Manuscript

The definitive version is available at www.blackwellsynergy.com

0022-1112