Literaturdatenbank
Literaturdatenbank |
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Singleton, J. M., Hearlson, J., & Thomas, B. R. (2013). Escape rates of semi-aquatic turtles from basking and funnel traps. Herpetological Review, 44(3), 442–444.
Added by: Sarina Wunderlich (06 Jul 2014 16:17:21 UTC) |
| Resource type: Journal Article BibTeX citation key: Singleton2013 View all bibliographic details  |
Categories: General Keywords: Geoemydidae, Habitat - habitat, Nordamerika - North America, Sacalia bealei, Sacalia quadriocellata, Schildkröten - turtles + tortoises Creators: Hearlson, Singleton, Thomas Collection: Herpetological Review |
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| Abstract |
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Researchers commonly use turtle traps to obtain study animals for use in experimentation and to sample populations and communities to generate estimates of various community or population level parameters. However, most traps are biased with respect to the probability of capturing different species, individuals of different sizes, or different sexes. An improved understanding of such biases may help researchers generate more accurate estimates of population or community level parameters. Some turtles may escape from traps but previous studies of escape frequency have reported very different results. Also, past studies have failed to compare the escape rates among different species or between different trap types. To examine trap escape rates, Trachemys scripta and Chrysemys picta were placed randomly into basking traps or funnel traps, which were checked after ~24 hr to determine escape. Overall, turtles escaped from traps during 74.6% of the trials. Adult females of both species escaped from basking traps more frequently than males or juveniles. In general, smaller individuals (of both species) were significantly less likely to escape from basking traps (T. scripta: Z = -3.2124; d.f. = 1; p=0.0013; C. picta: Z = -2.7918; d.f. = 1; p = 0.0052. In contrast, body size and sex were not significant predictors of escape from funnel traps for either species.
Added by: Sarina Wunderlich |