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Effects of dam removal on resident f...

Chen, Chia-Hsiu.

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Effects of dam removal on resident fish movement in Cijiawan River, Taiwan.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Effects of dam removal on resident fish movement in Cijiawan River, Taiwan./
Author:	Chen, Chia-Hsiu.
Description:	57 p.
Notes:	Source: Masters Abstracts International, Volume: 51-02.
Contained By:	Masters Abstracts International51-02(E).
Subject:	Agriculture, Fisheries and Aquaculture. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1515876
ISBN:	9781267525659

Effects of dam removal on resident fish movement in Cijiawan River, Taiwan.
Chen, Chia-Hsiu.

Effects of dam removal on resident fish movement in Cijiawan River, Taiwan. - 57 p.

Source: Masters Abstracts International, Volume: 51-02.

Thesis (M.S.)--University of Washington, 2012.

Freshwater fish change their movement patterns in response to natural or anthropogenic changes in habitat. Dam removal, a major restoration practice to restore river longitudinal connectivity, can affect river habitat with changes in flow regimes and morphological changes due to the sudden release of dam-trapped sediments. In Taiwan, a mid-size dam, Cijiawan #1 dam, was removed in 2011 to provide access to upstream habitat for the endangered target species, Taiwan salmon (Oncorhynchus masou formosanus). A three-phase radio telemetry tracking experiment was conducted to identify the movement patterns before, during and after dam removal. Some tagged fish were also displaced downstream to observe homing behavior. The movements of non-displaced fish showed reduced movement over time and persistence of location which indicates that the influence of disturbance due to capture and tagging was temporary. Displaced fish showed significant long distance movement toward their original home range immediately after release, but became as sedentary as non-displaced fish over time. The displaced fish homing behavior was limited by the barrier effect before dam removal, but daily movements and total absolute stream distance covered both increased after dam removal as fish began accessing upstream habitat. During the dam removal phase, fish below the dam moved very little when the heavy machinery was in the stream and then made long distance movements when upstream habitat was accessible after deconstruction. The rapid response of Taiwan salmon in this study confirmed that the new habitat opened by the dam removal project could be utilized almost immediately, but the sensitivity to habitat degradation indicates that extra attention to short-term habitat impacts should be considered for future stream restoration practices.

ISBN: 9781267525659Subjects--Topical Terms:

1020913
Agriculture, Fisheries and Aquaculture.

Effects of dam removal on resident fish movement in Cijiawan River, Taiwan.
LDR:02699nam a2200289 4500 001 1964827
005 20141013105125.5
008 150210s2012 ||||||||||||||||| ||eng d
020 $a 9781267525659
035 $a (MiAaPQ)AAI1515876
035 $a AAI1515876
040 $a MiAaPQ $c MiAaPQ
100 1 $a Chen, Chia-Hsiu. $3 2101349
245 1 0 $a Effects of dam removal on resident fish movement in Cijiawan River, Taiwan.
300 $a 57 p.
500 $a Source: Masters Abstracts International, Volume: 51-02.
500 $a Adviser: Susan Bolton.
502 $a Thesis (M.S.)--University of Washington, 2012.
520 $a Freshwater fish change their movement patterns in response to natural or anthropogenic changes in habitat. Dam removal, a major restoration practice to restore river longitudinal connectivity, can affect river habitat with changes in flow regimes and morphological changes due to the sudden release of dam-trapped sediments. In Taiwan, a mid-size dam, Cijiawan #1 dam, was removed in 2011 to provide access to upstream habitat for the endangered target species, Taiwan salmon (Oncorhynchus masou formosanus). A three-phase radio telemetry tracking experiment was conducted to identify the movement patterns before, during and after dam removal. Some tagged fish were also displaced downstream to observe homing behavior. The movements of non-displaced fish showed reduced movement over time and persistence of location which indicates that the influence of disturbance due to capture and tagging was temporary. Displaced fish showed significant long distance movement toward their original home range immediately after release, but became as sedentary as non-displaced fish over time. The displaced fish homing behavior was limited by the barrier effect before dam removal, but daily movements and total absolute stream distance covered both increased after dam removal as fish began accessing upstream habitat. During the dam removal phase, fish below the dam moved very little when the heavy machinery was in the stream and then made long distance movements when upstream habitat was accessible after deconstruction. The rapid response of Taiwan salmon in this study confirmed that the new habitat opened by the dam removal project could be utilized almost immediately, but the sensitivity to habitat degradation indicates that extra attention to short-term habitat impacts should be considered for future stream restoration practices.
590 $a School code: 0250.
650 4 $a Agriculture, Fisheries and Aquaculture. $3 1020913
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Engineering, Environmental. $3 783782
690 $a 0792
690 $a 0329
690 $a 0775
710 2 $a University of Washington. $b Forest Resources. $3 2093012
773 0 $t Masters Abstracts International $g 51-02(E).
790 $a 0250
791 $a M.S.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1515876