Skip to main content

Fishway entrance modifications enhance fish attraction

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Two Denil fishways on the Grand River, Ontario, were monitored annually since 1994 for activity by several dozen fish species. Fishway entrances were enlarged and repositioned approximately 2 m closer to the weir face, in areas where fish were attracted by weir discharge. These simple modifications resulted in increased attraction efficiency for pumpkinseed, Lepomis gibbosus (L.). After modifications, annual relative rate of recapture was 39% (95% confidence interval [CI]=32–46%), representing a 2.6–3-fold increase in fishway use relative to pre-modification conditions. Median daily recapture rates also increased significantly from 0% at both fishways to approximately 2%. These results suggest that fishway entrances should be located as close to a dam or weir face as possible, but velocity barriers from spillway or tailrace discharge must not compromise access.

Keywords: attraction; efficiency; enhancement; fishways; modifications; warmwater species

Document Type: Research Article

DOI: http://dx.doi.org/10.1046/j.1365-2400.2001.00238.x

Affiliations: Department of Biology, University of Waterloo, Waterloo, Ontario, Canada

Publication date: April 1, 2001

bsc/fme/2001/00000008/00000002/art00001
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more