Mating System Variation in Woodhouse's Toad (Bufo woodhousii)

Ethology - Tập 83 Số 1 - Trang 60-68 - 1989
Brian K. Sullivan1
1Department of Zoology, University of Maine, Orono

Tóm tắt

AbstractSexual selection and mating‐system variation was studied in two disjunct populations of Woodhouse's toad (Bufo woodhousii) with dissimilar breeding‐period durations. In spite of the differences in breeding‐period duration, nightly operational sex ratios were roughly equivalent and strongly male biased in both populations, ranging from 0 to 0.5 in the population with a prolonged breeding period, and from 0 to 0.2 in the explosively breeding form. Although operational sex ratios were similar, some males mated with up to three females in the population with an extended breeding period, whereas none of the males mated polygynously in the population with a short breeding season. Two alternative reproductive tactics, satellite and active‐searching behavior, were only exhibited by males under high densities in the population with a short breeding period. In the population with an extended breeding period, male mating success was positively related to call rate, but independent of size or number of nights of participation in chorus activity. Although operational sex ratios were equally low, mating was random by size, number of nights of participation in chorus activity, and call rate for males in the explosively breeding population.

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Tài liệu tham khảo

Arak A., 1983, Mate Choice, 181

10.1111/j.1558-5646.1984.tb00344.x

10.1093/icb/24.2.309

Blair A. P., 1941, Population structure in toads, Am. Nat., 7, 563

10.1126/science.327542

Endler J. A., 1986, Natural Selection in the Wild

Harvey P. H., 1983, Current Problems in Sociobiology, 343

Hollander M., 1973, Nonparametrical Statistical Methods

10.1111/j.1558-5646.1985.tb05665.x

10.1016/S0003-3472(88)80073-3

10.1086/284491

Lauder G. V., 1986, Evolution of Animal Behavior, 9

10.1139/z76-145

McCloskey R. T., 1987, Tree lizard (Urosaurus ornatus) territories: experimental perturbation of the sex ratio, Ecology, 68, 2059, 10.2307/1939897

McCloskey R. T., 1987, Defense of mates: a territory departure rule for male tree lizards following sex‐ratio manipulation, Oecologia, 73, 28, 10.1007/BF00376973

McLain D. K., 1986, Null models and the “intensity” of sexual selection, Evol. Theory, 8, 49

10.1139/z66-006

10.1007/BF00379496

Ridley M., 1983, The Explanation of Organic Diversity

10.1016/B978-0-12-662650-6.50009-X

Rubenstein D. I., 1986, Ecological Aspects of Social Evolution. Princeton Univ

Ryan M. J., 1983, Sexual selection and communication in a neotropical frog, Physalaemus pustulosus, Evolution, 27, 261, 10.2307/2408335

Sokal R. R., 1981, Biometry

10.1016/S0003-3472(82)80138-3

10.1016/S0003-3472(83)80006-2

10.1016/S0003-3472(87)80126-4

Thornhill R., 1983, The Evolution of Insect Mating Systems. Harvard Univ, 10.4159/harvard.9780674433960

10.1111/j.1558-5646.1955.tb01555.x

10.1016/S0003-3472(80)80052-2

Weatherhead P. J., 1979, Ecological correlates of monogamy in tundra‐breeding savannah sparrows, Auk, 96, 391

10.1016/0003-3472(77)90118-X

10.2307/1938975

10.1007/BF00379020

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Ethology

Tập 83 Số 1

60-68

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