التفاصيل البيبلوغرافية
| العنوان: |
Multiple Paternity in Garter Snakes With Evolutionarily Divergent Life Histories |
| المؤلفون: |
Eric J Gangloff (11638225), Megan B Manes (11638228), Tonia S Schwartz (11638231), Kylie Robert (4608700), Natalie Huebschman (11638234), Anne M Bronikowski (3316602) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Uncategorized, life-history evolution, multiple mating, reproductive skew, sexual selection, Thamnophis elegans |
| الوصف: |
Many animal species exhibit multiple paternity, defined as multiple males genetically contributing to a single female reproductive event, such as a clutch or litter. Although this phenomenon is well documented across a broad range of taxa, the underlying causes and consequences remain poorly understood. For example, it is unclear how multiple paternity correlates with life-history strategies. Furthermore, males and females may differ in mating strategies and these patterns may shift with ecological context and life-history variation. Here, we take advantage of natural life-history variation in garter snakes (Thamnophis elegans) to address these questions in a robust field setting where populations have diverged along a slow-to-fast life-history continuum. We determine both female (observed) and male (using molecular markers) reproductive success in replicate populations of 2 life-history strategies. We find that despite dramatic differences in annual female reproductive output: 1) females of both life-history ecotypes average 1.5 sires per litter and equivalent proportions of multiply-sired litters, whereas 2) males from the slow-living ecotype experience greater reproductive skew and greater variance in reproductive success relative to males from the fast-living ecotype males despite having equivalent average reproductive success. Together, these results indicate strong intrasexual competition among males, particularly in the fast-paced life-history ecotype. We discuss these results in the context of competing hypotheses for multiple paternity related to population density, resource variability, and life-history strategy. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| Relation: |
https://figshare.com/articles/journal_contribution/Multiple_Paternity_in_Garter_Snakes_With_Evolutionarily_Divergent_Life_Histories/16920817 |
| DOI: |
10.26181/16920817.v1 |
| الاتاحة: |
https://doi.org/10.26181/16920817.v1 |
| Rights: |
CC BY 4.0 |
| رقم الانضمام: |
edsbas.1B63408E |
| قاعدة البيانات: |
BASE |