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- Title
The effects of two fish predators on Wood Frog ( Lithobates sylvaticus) tadpoles in a subarctic wetland: Hudson Bay Lowlands, Canada.
- Authors
Davenport, J.M.; Seiwert, P.A.; Fishback, L.A.; Cash, W.B.
- Abstract
Fish can have strong predatory impacts on aquatic food webs. Indeed, fish are known to have strong effects on amphibians, with some species being excluded from communities where fish are present. Most research with amphibians and fish has focused on lower latitudes and very little is known of amphibian-fish interactions at higher latitudes. Therefore, we conducted an enclosure experiment in a subarctic natural wetland to examine the predatory effects of two species of fish, brook sticklebacks ( Culaea inconstans (Cuvier, 1829)) and ninespine sticklebacks ( Pungitius pungitius (L., 1758)), on the survival and growth of Wood Frogs ( Lithobates sylvaticus (LeConte, 1825)). We found no significant difference in survival and size at metamorphosis among the two fish species treatments and fish-free treatments. We found that individuals from fish-free treatments metamorphosed earlier than those from either fish species present treatment. Our work suggests that stickleback fish predation may not have a major impact on Wood Frog tadpole survival and growth in a subarctic wetland. Sticklebacks may still have an impact on earlier developmental stages of Wood Frogs. This work begins to fill an important gap in potential factors that may impact larval amphibian survival and growth at higher latitudes.
- Subjects
SUBARCTIC region; HUDSON Bay Lowlands (Canada); CANADA; PREDATORY animals; WOOD frog; TADPOLES; WETLAND animals; WETLANDS; ANIMAL behavior
- Publication
Canadian Journal of Zoology, 2013, Vol 91, Issue 12, p866
- ISSN
0008-4301
- Publication type
Article
- DOI
10.1139/cjz-2013-0091