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Experimental alteration of litter sex ratios in a mammal
Adaptive theory predicts that mothers would be advantaged by adjusting the sex ratio of their offspring in relation to their offspring's future reproductive success. Studies investigating sex ratio variation in mammals, including humans, have obtained notoriously inconsistent results, except wh...
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| Published in: | Proceedings of the Royal Society. B, Biological sciences Biological sciences, 2008-02, Vol.275 (1632), p.323-327 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c621t-e0b2253beadb22cdac5c9a38cd49055b65f515ebe07e8d5cd6c675ae692414b23 |
| container_end_page | 327 |
| container_issue | 1632 |
| container_start_page | 323 |
| container_title | Proceedings of the Royal Society. B, Biological sciences |
| container_volume | 275 |
| creator | Cameron, Elissa Z Lemons, Patrick R Bateman, Philip W Bennett, Nigel C |
| description | Adaptive theory predicts that mothers would be advantaged by adjusting the sex ratio of their offspring in relation to their offspring's future reproductive success. Studies investigating sex ratio variation in mammals, including humans, have obtained notoriously inconsistent results, except when maternal condition is measured around conception. Several mechanisms for sex ratio adjustment have been proposed. Here, we test the hypothesis that glucose concentrations around conception influence sex ratios. The change in glucose levels resulted in a change in sex ratios, with more daughters being born to females with experimentally lowered glucose, and with the change in glucose levels being more predictive than the glucose levels per se. We provide evidence for a mechanism, which, in tandem with other mechanisms, could explain observed sex ratio variation in mammals. |
| doi_str_mv | 10.1098/rspb.2007.1401 |
| format | article |
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| identifier | ISSN: 0962-8452 |
| ispartof | Proceedings of the Royal Society. B, Biological sciences, 2008-02, Vol.275 (1632), p.323-327 |
| issn | 0962-8452 1471-2954 |
| language | eng |
| recordid | cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_2593724 |
| source | JSTOR Archival Journals and Primary Sources Collection; PubMed Central; Royal Society Publishing Jisc Collections Royal Society Journals Read & Publish Transitional Agreement 2025 (reading list) |
| subjects | Animals Blood glucose Blood Glucose - analysis Blood Glucose - physiology Daughters Dexamethasone - administration & dosage Female Glucocorticoids - administration & dosage Glucose Glucose - metabolism Glucose - physiology Male Mammals Maternal Investment Mating behavior Mice Mice - physiology Parametric models Reproduction Reproduction - physiology Sex Allocation Sex Ratio Sons Trivers-Willard Hypothesis Ungulates |
| title | Experimental alteration of litter sex ratios in a mammal |
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