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- Title
Ancient Lake Maxima and Substrate-dependent Riverine Migration Have Defined the Range of the Mudpuppy (Necturus maculosus) in Southern Ontario Following the Wisconsinan Glaciation.
- Authors
MILLS, PETER B.; HILL, DUNCAN J. E.
- Abstract
The Mudpuppy (Necturus maculosus) is an entirely aquatic salamander whose geographic range is thus defined by immigration routes in watersheds that permit feasible travel. Significant barriers, such as large waterfalls, effectively bar this species from further colonization upstream. We compared the contemporary distribution of Mudpuppies in southern Ontario with varying post-glacial ancient lake maxima and riverine outlet-flow conditions. Topography does not appear to be a range-limiting factor, but the type of river grade (waterfalls versus riffles) does. The distribution of modem records of this species in Ontario aligns closely with maxima from the Nipissing phase occurring 4000-5000 years ago, leading us to suggest that this is when Mudpuppies invaded and proliferated in the Great Lakes Basin.
- Subjects
ONTARIO; LAKES; RIVERINE operations; ANIMAL migration; NECTURUS maculosus; SALAMANDER ecology
- Publication
Canadian Field-Naturalist, 2016, Vol 130, Issue 2, p158
- ISSN
0008-3550
- Publication type
Article
- DOI
10.22621/cfn.v130i2.1840