Corresponding long-term shifts in stream temperature and invasive fish migration

Canadian Journal of Fisheries and Aquatic Sciences
By: , and 

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Abstract

By investigating historic trapping records of invasive sea lamprey (Petromyzon marinus) throughout tributaries to the Laurentian Great Lakes, we found that upstream spawning migration timing was highly correlated with stream temperatures over large spatial and temporal scales. Furthermore, several streams in our study exceeded a critical spring thermal threshold (i.e., 15°C) and experienced peak spawning migration up to 30 days earlier since the 1980s, whereas others were relatively unchanged. Streams exhibiting warming trends and earlier migration were spatially clustered and generally found on the leeward side of the Great Lakes where the lakes most affect local climate. These findings highlight that all streams are not equally impacted by climate change and represent, to our knowledge, the first observation linking long-term changes in stream temperatures to shifts in migration timing of an invasive fish. Earlier sea lamprey migration in Great Lakes tributaries may improve young of the year growth and survival, but not limit their spatial distribution, making sea lamprey control more challenging.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Corresponding long-term shifts in stream temperature and invasive fish migration
Series title Canadian Journal of Fisheries and Aquatic Sciences
DOI 10.1139/cjfas-2017-0195
Volume 75
Issue 5
Year Published 2018
Language English
Publisher NRC Research Press
Contributing office(s) Great Lakes Science Center
Description 7 p.
First page 772
Last page 778
Country Canada, United States
Other Geospatial Laurentian Great Lakes