Contrasting genetic structures in sister species of North American scrub-jays
نویسندگان
چکیده
David B. McDonald1, Wayne K. Potts2, John W. Fitzpatrick3 and Glen E. Woolfenden4 1Department of Zoology and Physiology, University ofWyoming, Laramie,WY 82071-3166, USA ([email protected]) 2Department of Biology, University of Utah, Salt Lake City, UT 84112, USA 3Cornell Laboratory of Ornithology, 159 SapsuckerWoods Rd, Ithaca, NY 14850, USA 4Archbold Biological Station, 123 Main Drive,Venus, FL 33960, USA
منابع مشابه
Serial Reversal Learning and the Evolution of Behavioral Flexibility in Three Species of North American Corvids (<i>Gymnorhinus cyanocephalus, Nucifraga columbiana, Aphelocoma californica</i>)
In serial reversal learning, subjects learn to respond differentially to 2 stimuli. When the task is fully acquired, reward contingencies are reversed, requiring the subject to relearn the altered associations. This alternation of acquisition and reversal can be repeated many times, and the ability of a species to adapt to this regimen has been considered as an indication of behavioral flexibil...
متن کاملSerial reversal learning and the evolution of behavioral flexibility in three species of North American corvids (Gymnorhinus cyanocephalus, Nucifraga columbiana, Aphelocoma californica).
In serial reversal learning, subjects learn to respond differentially to 2 stimuli. When the task is fully acquired, reward contingencies are reversed, requiring the subject to relearn the altered associations. This alternation of acquisition and reversal can be repeated many times, and the ability of a species to adapt to this regimen has been considered as an indication of behavioral flexibil...
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Food caching has been linked to better performance on spatial memory tasks and enlarged hippocampal volume in both birds and mammals. Within food-caching birds, it has also been predicted that species less reliant on stored food should have inferior spatial memory and a smaller hippocampus compared to species that depend heavily on food caches. Several comparisons suggest that North American co...
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The relative size of the avian hippocampus (Hp) has been shown to be related to spatial memory and food storing in two avian families, the parids and corvids. Basil et al. [Brain Behav Evol 1996;47:156-164] examined North American food-storing birds in the corvid family and found that Clark's nutcrackers had a larger relative Hp than pinyon jays and Western scrub jays. These results correlated ...
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Habitat gap size has been negatively linked to movement probability in several species occupying fragmented landscapes. How these effects on movement behaviour in turn affect the genetic structure of fragmented populations at local scales is less well known. We tested, and confirmed, the hypothesis that genetic differentiation among adjacent populations of Florida scrub jays--an endangered bird...
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