The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Douglas A. Nelson - One of the best experts on this subject based on the ideXlab platform.
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Song sharing correlates with lifetime social pairing success but not territory tenure in the Puget Sound white-crowned sparrow
Behavioral Ecology and Sociobiology, 2013Co-Authors: Douglas A. Nelson, Angelika PoeselAbstract:Imitative song learning in birds often results in the formation of vocal dialects or local song neighborhoods in which males in close proximity share very similar songs. If song sharing confers a selective advantage due to intra-sexual competition or inter-sexual mate choice, song sharing should enhance the singer’s territory tenure or lifetime pairing success. We tested this in a Migratory Population of the Puget Sound white-crowned sparrow, Zonotrichia leucophrys pugetensis , in which some territory neighbors share whole songs. Song sharing with territory neighbors in the first year on territory did not correlate with territory tenure but correlated positively with social pairing success throughout a male’s lifetime when length of territory tenure was controlled. Thus, song sharing in this Migratory Population does not appear to confer a benefit in male–male interactions, at least as measured by the length of territory tenure. However, males that share songs do benefit from higher lifetime pairing success. Combined with the data available for other species, it appears that intra- and inter-sexual selection may have stronger effects on song sharing in sedentary and Migratory Populations, respectively.
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The capacity for song memorization varies in Populations of the same species
Animal Behaviour, 1996Co-Authors: Douglas A. Nelson, C. S. Whaling, Peter MarlerAbstract:Abstract To compare the song learning capacity of Migratory and sedentary birds, we contrasted the responses of males from two different Populations of the white-crowned sparrow, Zonotrichia leucophrys , to rich and lean regimes of early tutor experience. The two regimes were designed to simulate extremes in the variety of songs that young males might experience. Males from the Migratory Population, Z. l. oriantha , learned significantly more tutor material, from more tutor song types, and produced more song types themselves during vocal rehearsal from a rich tutoring regime than from a lean regime. Males of the sedentary nuttalli race learned similar amounts from rich and lean regimes. We argue that a Migratory annual cycle introduces greater uncertainty into where a young male will breed for the first time, and that this has favoured the capacity to memorize more songs during the early sensitive phase for song memorization in Migratory Populations.
Angelika Poesel - One of the best experts on this subject based on the ideXlab platform.
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Song sharing correlates with lifetime social pairing success but not territory tenure in the Puget Sound white-crowned sparrow
Behavioral Ecology and Sociobiology, 2013Co-Authors: Douglas A. Nelson, Angelika PoeselAbstract:Imitative song learning in birds often results in the formation of vocal dialects or local song neighborhoods in which males in close proximity share very similar songs. If song sharing confers a selective advantage due to intra-sexual competition or inter-sexual mate choice, song sharing should enhance the singer’s territory tenure or lifetime pairing success. We tested this in a Migratory Population of the Puget Sound white-crowned sparrow, Zonotrichia leucophrys pugetensis , in which some territory neighbors share whole songs. Song sharing with territory neighbors in the first year on territory did not correlate with territory tenure but correlated positively with social pairing success throughout a male’s lifetime when length of territory tenure was controlled. Thus, song sharing in this Migratory Population does not appear to confer a benefit in male–male interactions, at least as measured by the length of territory tenure. However, males that share songs do benefit from higher lifetime pairing success. Combined with the data available for other species, it appears that intra- and inter-sexual selection may have stronger effects on song sharing in sedentary and Migratory Populations, respectively.
Barry K Hartup - One of the best experts on this subject based on the ideXlab platform.
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Serum Biochemical Analytes and Trace Elements in Juvenile Whooping Cranes (Grus americana).
Journal of wildlife diseases, 2019Co-Authors: Cameron Ratliff, Barry K HartupAbstract:Abstract Biochemical and trace element analyses of blood from wild Whooping Cranes (Grus americana) were performed to assess the health of the only self-sustaining, Migratory Population in North Am...
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comparison of serum protein electrophoresis values in wild and captive whooping cranes grus americana
Journal of Avian Medicine and Surgery, 2015Co-Authors: Jennifer C Hausmann, Carolyn Cray, Barry K HartupAbstract:Abstract: Protein electrophoresis of serum samples from endangered, wild whooping cranes (Grus americana) was performed to help assess the health of the only self-sustaining, Migratory Population in North America. Serum samples from wild adult cranes (n = 22) were taken at Aransas National Wildlife Refuge, Texas, USA during winter. Wild juvenile cranes (n = 26) were sampled at Wood Buffalo National Park, Northwest Territories, Canada, in midsummer. All captive crane samples were acquired from the International Crane Foundation, Baraboo, WI, USA. Captive adult cranes (n = 30) were sampled during annual examinations, and archived serum samples from captive juvenile cranes (n = 19) were selected to match the estimated age of wild juveniles. Wild juveniles had significantly lower concentrations of all protein fractions than wild adults, except for prealbumin and γ globulins. All protein fraction concentrations for wild juveniles were significantly lower compared with captive juveniles, except for prealbumin a...
Dominique A Potvin - One of the best experts on this subject based on the ideXlab platform.
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song repertoire size not territory location predicts reproductive success and territory tenure in a Migratory songbird
Canadian Journal of Zoology, 2015Co-Authors: Dominique A Potvin, P W Crawford, Scott A Macdougallshackleton, Elizabeth A MacdougallshackletonAbstract:In territorial animals occupying environments that vary in quality over the landscape, high-quality individuals are predicted to monopolize high-quality territories. Thus, in many cases it may be difficult to disentangle the relative effects of individual quality from those of territory quality on long-term fitness. We used a 9-year field data set from a Migratory Population of Eastern Song Sparrows (Melospiza melodia melodia (A. Wilson, 1810)) to evaluate the relative contributions of male song quality (as measured by song repertoire size) and territory location to fitness components including annual reproductive success, overwinter return rates, and between-year territory tenure. Song repertoire size did not predict territory location, allowing us to evaluate territory location and song quality separately. Song repertoire size, but not territory location, predicted annual reproductive success. Moreover, males with larger repertoires moved smaller distances between subsequent breeding seasons, suggesting...
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song repertoire size not territory location predicts
2015Co-Authors: Dominique A PotvinAbstract:In territorial animals occupying environments that vary in quality over the landscape, high-quality individuals are predicted to monopolize high-quality territories. Thus, in many cases it may be difficult to disentangle the relative effects of individual quality from those of territory quality on long-term fitness. We used a 9-year field data set from a Migratory Population of Eastern Song Sparrows (Melospiza melodia melodia (A. Wilson, 1810)) to evaluate the relative contributions of male song quality (as measured by song repertoire size) and territory location to fitness components including annual reproductive success, over- winter return rates, and between-year territory tenure. Song repertoire size did not predict territory location, allowing us to evaluate territory location and song quality separately. Song repertoire size, but not territory location, predicted annual reproductive success. Moreover, males with larger repertoires moved smaller distances between subsequent breeding seasons, suggesting more successful territory tenure. There was no effect of either repertoire size or territory location on overwinter return. We conclude that intrinsic male phenotype, indicated by song repertoire size, is an important predictor of male fitness, independent of breeding-territory location in this Migratory Population, and that the value of specific territories may depend largely on previous experience.
Peter Marler - One of the best experts on this subject based on the ideXlab platform.
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The capacity for song memorization varies in Populations of the same species
Animal Behaviour, 1996Co-Authors: Douglas A. Nelson, C. S. Whaling, Peter MarlerAbstract:Abstract To compare the song learning capacity of Migratory and sedentary birds, we contrasted the responses of males from two different Populations of the white-crowned sparrow, Zonotrichia leucophrys , to rich and lean regimes of early tutor experience. The two regimes were designed to simulate extremes in the variety of songs that young males might experience. Males from the Migratory Population, Z. l. oriantha , learned significantly more tutor material, from more tutor song types, and produced more song types themselves during vocal rehearsal from a rich tutoring regime than from a lean regime. Males of the sedentary nuttalli race learned similar amounts from rich and lean regimes. We argue that a Migratory annual cycle introduces greater uncertainty into where a young male will breed for the first time, and that this has favoured the capacity to memorize more songs during the early sensitive phase for song memorization in Migratory Populations.