Viviparity as a constraint on sex-ratio evolution.
In polytocous mammals, the sex ratio during gestation can influence a variety of morphological, physiological, and life-history traits because of steroid leakage between fetuses. Similar phenomena have also recently been described for a viviparous lizard. Some of these effects have important fitness...
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| Format: | Journal article |
| Language: | English |
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2003
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| _version_ | 1797095831571005440 |
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| author | Uller, T |
| author_facet | Uller, T |
| author_sort | Uller, T |
| collection | OXFORD |
| description | In polytocous mammals, the sex ratio during gestation can influence a variety of morphological, physiological, and life-history traits because of steroid leakage between fetuses. Similar phenomena have also recently been described for a viviparous lizard. Some of these effects have important fitness consequences by influencing reproductive success later in life. Thus, biasing the sex ratio toward one sex may lead to a decreased fitness for the other sex, and therefore constrain the evolution of skewed sex ratios. By incorporating effects of sex ratio on offspring fitness in a simple sex-allocation model, I show that, under some circumstances (1) skewed sex ratios are predicted to evolve, and (2) this cost can constrain the evolution of skewed sex ratios. |
| first_indexed | 2024-03-07T04:33:35Z |
| format | Journal article |
| id | oxford-uuid:cf25c204-f950-4c5e-a154-78b3efcf4087 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:33:35Z |
| publishDate | 2003 |
| record_format | dspace |
| spelling | oxford-uuid:cf25c204-f950-4c5e-a154-78b3efcf40872022-03-27T07:40:35ZViviparity as a constraint on sex-ratio evolution.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:cf25c204-f950-4c5e-a154-78b3efcf4087EnglishSymplectic Elements at Oxford2003Uller, TIn polytocous mammals, the sex ratio during gestation can influence a variety of morphological, physiological, and life-history traits because of steroid leakage between fetuses. Similar phenomena have also recently been described for a viviparous lizard. Some of these effects have important fitness consequences by influencing reproductive success later in life. Thus, biasing the sex ratio toward one sex may lead to a decreased fitness for the other sex, and therefore constrain the evolution of skewed sex ratios. By incorporating effects of sex ratio on offspring fitness in a simple sex-allocation model, I show that, under some circumstances (1) skewed sex ratios are predicted to evolve, and (2) this cost can constrain the evolution of skewed sex ratios. |
| spellingShingle | Uller, T Viviparity as a constraint on sex-ratio evolution. |
| title | Viviparity as a constraint on sex-ratio evolution. |
| title_full | Viviparity as a constraint on sex-ratio evolution. |
| title_fullStr | Viviparity as a constraint on sex-ratio evolution. |
| title_full_unstemmed | Viviparity as a constraint on sex-ratio evolution. |
| title_short | Viviparity as a constraint on sex-ratio evolution. |
| title_sort | viviparity as a constraint on sex ratio evolution |
| work_keys_str_mv | AT ullert viviparityasaconstraintonsexratioevolution |