Walleye spawning site selection in a Lake Ontario tributary: A predictive tool to guide management. Brian F. Kelder

ISBN: 9780549598206

Published:

NOOKstudy eTextbook

85 pages


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Walleye spawning site selection in a Lake Ontario tributary: A predictive tool to guide management.  by  Brian F. Kelder

Walleye spawning site selection in a Lake Ontario tributary: A predictive tool to guide management. by Brian F. Kelder
| NOOKstudy eTextbook | PDF, EPUB, FB2, DjVu, AUDIO, mp3, RTF | 85 pages | ISBN: 9780549598206 | 8.74 Mb

A spatially explicit model predicting walleye (Sander vitreus) spawning site selection as a function of physical habitat characteristics was developed using logistic regression and data from Kents Creek, NY. Walleye eggs (N=22,246) were collected using passive traps and habitat parameters were monitored at each trap. Probability of spawning (egg presence) was strongly related to dominance of course substrate and exhibited a weak negative relationship with depth.

Accumulated spring water temperatures predicted the decline of spawning activity as the spawning season progressed. Water velocity was difficult to measure and predict in the system, but was positively related to egg density among sites with eggs present.

Beaver dams may limit access to 22% (4,021 m2) of the suitable spawning habitat in the study reach in certain years and reduce connectivity with nursery areas. This quantitative predictive tool to identify critical habitat allows for reach-scale analyses that can guide spawning habitat restoration efforts.



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