Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy
Patterns of maternal expenditure in Plains bison (Bison bison bison) are equivocal, with different studies yielding conflicting results. Therefore, our objective was to investigate the unsettled question of differential maternal expenditure in Plains bison. By observing the nursing behavior of known...
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ftbioone:10.1637/19-009 2023-07-30T04:07:31+02:00 Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy Toby Klein Ronald J. Sarno Toby Klein Ronald J. Sarno world 2020-01-21 text/HTML https://doi.org/10.1637/19-009 en eng University of Notre Dame doi:10.1637/19-009 All rights reserved. https://doi.org/10.1637/19-009 Text 2020 ftbioone https://doi.org/10.1637/19-009 2023-07-09T10:37:00Z Patterns of maternal expenditure in Plains bison (Bison bison bison) are equivocal, with different studies yielding conflicting results. Therefore, our objective was to investigate the unsettled question of differential maternal expenditure in Plains bison. By observing the nursing behavior of known age calves, we measured post birth maternal expenditure on sons and daughters between birth and 3 mo of age. Calf weights at 6 mo of age also were measured. Because male calves grow faster and are larger than females as adults, we predicted sons would attempt to acquire more energy via differential nursing behavior and would be heavier at 6 mo of age. The results of our t-tests revealed no significant differences between sons and daughters in any nursing behavior. Male calves, however, performed all behaviors approximately 12% (range 8–20%) more frequently than female calves. For example, despite the nursing attempts of sons being rejected nearly 13% more often than that of daughters, sons nursed about 10% more frequently and 9% longer than daughters did. This occurred despite mothers terminating nursing bouts equally for both sexes. Therefore sons appear to demand (and obtain) more energy from mothers than daughters. Text Bison bison bison Plains Bison BioOne Online Journals |
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Patterns of maternal expenditure in Plains bison (Bison bison bison) are equivocal, with different studies yielding conflicting results. Therefore, our objective was to investigate the unsettled question of differential maternal expenditure in Plains bison. By observing the nursing behavior of known age calves, we measured post birth maternal expenditure on sons and daughters between birth and 3 mo of age. Calf weights at 6 mo of age also were measured. Because male calves grow faster and are larger than females as adults, we predicted sons would attempt to acquire more energy via differential nursing behavior and would be heavier at 6 mo of age. The results of our t-tests revealed no significant differences between sons and daughters in any nursing behavior. Male calves, however, performed all behaviors approximately 12% (range 8–20%) more frequently than female calves. For example, despite the nursing attempts of sons being rejected nearly 13% more often than that of daughters, sons nursed about 10% more frequently and 9% longer than daughters did. This occurred despite mothers terminating nursing bouts equally for both sexes. Therefore sons appear to demand (and obtain) more energy from mothers than daughters. |
author2 |
Toby Klein Ronald J. Sarno |
format |
Text |
author |
Toby Klein Ronald J. Sarno |
spellingShingle |
Toby Klein Ronald J. Sarno Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
author_facet |
Toby Klein Ronald J. Sarno |
author_sort |
Toby Klein |
title |
Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
title_short |
Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
title_full |
Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
title_fullStr |
Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
title_full_unstemmed |
Maternal Expenditure in Plains Bison (Bison bison bison): Subtle but Nontrivial Differences Between Sons and Daughters in the Demand of Energy |
title_sort |
maternal expenditure in plains bison (bison bison bison): subtle but nontrivial differences between sons and daughters in the demand of energy |
publisher |
University of Notre Dame |
publishDate |
2020 |
url |
https://doi.org/10.1637/19-009 |
op_coverage |
world |
genre |
Bison bison bison Plains Bison |
genre_facet |
Bison bison bison Plains Bison |
op_source |
https://doi.org/10.1637/19-009 |
op_relation |
doi:10.1637/19-009 |
op_rights |
All rights reserved. |
op_doi |
https://doi.org/10.1637/19-009 |
_version_ |
1772820901118607360 |