NDLI: Redd superimposition by introduced rainbow trout,oncorhynchus mykiss, on native charrs in a japanese stream

Content Provider	Springer Nature Link
Author	Taniguchi, Yoshiri Miyake, Yo Saito, Toshihiko Urabe, Hirokazu Naka, Shigeru
Copyright Year	2000
Abstract	Spawning redd superimposition of introduced, spring-spawning rainbow trout,Oncorhynchus mykiss, on native, fall-spawning Dolly varden,Salvelinus malma, and white-spotted charr,S. leucomaenis, were examined in a small stream in Hokkaido, Japan. The stream reaches in which Dolly Varden and white-sported charr redds were observed in fall 1997 greatly overlapped with the reaches in which rainbow trout redds were recorded in spring 1998. Spawning microhabitats were also similar between trout and the two charr species. Thirteen and 3% of Dolly Varden and white-spotted charr redds, respectively, were superimposed by rainbow trout redds. The eggs or alevins in the disturbed charr redds were potentially damaged because charrs were not likely to have emerged from the redds before the superimposition occurred. In sufficiently great abundance, introduced rainbow trout may negatively impact native charr populations by dislodging the latter’s spawning redds.
Starting Page	149
Ending Page	156
Page Count	8
File Format	PDF
ISSN	13418998
Journal	Ichthyological Research
Volume Number	47
Issue Number	2
e-ISSN	16163915
Language	English
Publisher	Springer Japan
Publisher Date	2000-01-01
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Species introduction redd superimposition rainbow trout Dolly Varden white-spotted charr invasion biology Zoology Ecology Animal Systematics/Taxonomy/Biogeography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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