We studied eight populations of the red-legged frog, Rana aurora, to examine responses of allotopic and syntopic tadpoles to the bullfrog, Rana catesbeiana, an introduced predator of R. aurora. We also assessed predation rates by R. catesbeiana on syntopic and allotopic populations of R. aurora. Syntopic R. aurora tadpoles significantly reduced their activity and increased their refuge use when presented with the chemical cues of both tadpoles and adult R. catesbeiana. In contrast, allotopic tadpoles did not significantly alter their behavior in the presence of either R. catesbeiana adults or larvae. Predation by R. catesbeiana was lower in syntopic than in allotopic populations of R. aurora tadpoles. Our results show differential responses of syntopic and allotopic R. aurora tadpoles to larval and adult R. catesbeiana. Syntopic tadpoles avoid predation by R. catesbeiana more efficiently than do tadpoles from allotopic populations. Apparently, individuals that are unfamiliar with novel, introduced organisms may not possess adaptations that would prevent a negative encounter.
Ecology – Ecological Society of America
Published: Sep 1, 1997
Keywords: antipredator behavior ; bullfrogs ; chemical cues ; endangered species ; introduced organisms ; population differences ; predator avoidance ; Rana aurora ; Rana catesbeiana ; red-legged frogs
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera