131
Views
9
CrossRef citations to date
0
Altmetric
Research papers

Patterns of cyprinid migration through a fishway in relation to light, water temperature and fish circling behaviour

, &
Pages 213-218 | Received 19 Oct 2004, Accepted 04 Jul 2005, Published online: 23 Aug 2010
 

Abstract

Patterns of cyprinid migration were studied in a fishway located at a lock on the Elbe River, Czech Republic, weekly from spring to fall 2003. 24 hrs observations of fish were made with a Riverwatcher Fishcounter manufactured by Vaki (Iceland). The counter records revealed distinct diel patterns of migration. During spring, fish migrated mostly during the light part of a day, in summer and fall this pattern changed. Water temperature and illumination intensity were found as the major driving forces initiating spawning migration and controlling its development and diel pattern. This hypothesis was verified by significant influence of interaction of weather and atmospheric pressure on the number of migrating fish. Because circling of fish within a pool and between adjacent pools of the fishway was a common behavioural pattern, overestimates offish migration acitivity occurred, especially in the downstream direction. These results point out that circling behaviour and the effect of weather condition on fish migration should be taken into account in every fishway monitoring effort.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.