TY - JOUR
T1 - Interspecific aggressive behaviour in salamanders
T2 - species-specific interference or misidentification?
AU - Nishikawa, Kiisa C.
N1 - Funding Information:
This research was conducted in partial fulfilment of the Ph.D. degree under the direction of Dr Nelson G. Hairston in the Department of Biology at the University of North Carolina, Chapel Hill. I am grateful to Dr Hairston and to Philip M. Service for their help during all stages of this research, from collecting specimens to editing manuscripts. I thank W. Searcy for encouragement and R. High-ton for advice on localities. C. Gerhardt, D. A. Good, H. W. Greene, R. G. Jaeger, B. G. Murray, N. Staub, A. E. Stiven, M. H. Wake, D. B. Wake, R. J. Wassersug, H. M. Wilbur and R. H. Wiley provided helpful comments on earlier drafts of this manuscript. This research was supported by grants from the Highlands Biological Station, Sigma Xi, the Wm. R. Kenan Professorship Fund and the Smith Fund of the University of North Carolina.
PY - 1987/2
Y1 - 1987/2
N2 - This research analyses variation in the interspecific aggressive behaviour of two salamander species, Plethodon jordani and P. glutinosus, from three localities which differ in extent of sympatry, the intensity of interspecific competition and frequency of hybridization. If interspecific aggression evolved by misidentification of species, it should either (1) vary concordantly with the frequency of hybridization, or (2) be similar in all of the localities. If selection for interspecific interference has occurred, interspecific aggression should vary concordantly with interspecific competition. Misidentification can account for variation in the interspecific aggressive behaviour of P. glutinosus, P. glutinosus from all localities did not distinguish behaviourally between heterospecifics and conspecifics. In contrast, for P. jordani, results suggest that alpha-selection has occurred under conditions of strong interspecific competition. P. jordani from the locality where interspecific competition is weak were less aggressive to heterospecifics than to conspecifics, while P. jordani from two localities where interspecific competition is strong were equally aggressive to heterospecifics and conspecifics.
AB - This research analyses variation in the interspecific aggressive behaviour of two salamander species, Plethodon jordani and P. glutinosus, from three localities which differ in extent of sympatry, the intensity of interspecific competition and frequency of hybridization. If interspecific aggression evolved by misidentification of species, it should either (1) vary concordantly with the frequency of hybridization, or (2) be similar in all of the localities. If selection for interspecific interference has occurred, interspecific aggression should vary concordantly with interspecific competition. Misidentification can account for variation in the interspecific aggressive behaviour of P. glutinosus, P. glutinosus from all localities did not distinguish behaviourally between heterospecifics and conspecifics. In contrast, for P. jordani, results suggest that alpha-selection has occurred under conditions of strong interspecific competition. P. jordani from the locality where interspecific competition is weak were less aggressive to heterospecifics than to conspecifics, while P. jordani from two localities where interspecific competition is strong were equally aggressive to heterospecifics and conspecifics.
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U2 - 10.1016/S0003-3472(87)80232-4
DO - 10.1016/S0003-3472(87)80232-4
M3 - Article
AN - SCOPUS:0010485599
SN - 0003-3472
VL - 35
SP - 263
EP - 270
JO - Animal Behaviour
JF - Animal Behaviour
IS - 1
ER -