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1 June 2003 Antipredator Defenses of Larval Pacific Giant Salamanders (Dicamptodon tenebrosus) against Cutthroat Trout (Oncorhynchus clarki)
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Abstract

We tested larval Pacific giant salamanders (Dicamptodon tenebrosus) for chemical and behavioral defenses against cutthroat trout (Oncorhynchus clarki). Young-of-year Dicamptodon were fully palatable to trout during single and repeated offerings. However, larvae increased refuge use in response to chemical cues from trout, although they did not select different microhabitats (shallow or deep) between trout treatments and controls. Our results suggest that, although Dicamptodon larvae are potentially vulnerable to predation by cutthroat trout, increased refuge use by larvae in response to trout chemical cues may reduce the probability of encounters and contribute to the coexistence of these species.

The American Society of Ichthyologists and Herpetologists
David E. Rundio and Deanna H. Olson "Antipredator Defenses of Larval Pacific Giant Salamanders (Dicamptodon tenebrosus) against Cutthroat Trout (Oncorhynchus clarki)," Copeia 2003(2), 402-407, (1 June 2003). https://doi.org/10.1643/0045-8511(2003)003[0402:ADOLPG]2.0.CO;2
Received: 21 August 2002; Accepted: 28 December 2002; Published: 1 June 2003
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