Academic Journal
Geographic variation in reproductive investment of seven populations of male Brown frog (Rana kukunoris), endemic to the eastern Tibetan Plateau
| العنوان: | Geographic variation in reproductive investment of seven populations of male Brown frog (Rana kukunoris), endemic to the eastern Tibetan Plateau |
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| المؤلفون: | Yu, Tong L., Li, Hai Y., Chen, Bo J., Chen, Peng Z., Liu, Xiang R., Wang, Yu |
| المساهمون: | National Natural Science Foundation of China |
| المصدر: | Animal Biology ; volume 72, issue 3, page 245-256 ; ISSN 1570-7555 1570-7563 |
| بيانات النشر: | Brill |
| سنة النشر: | 2022 |
| الوصف: | Life-history theory suggests that male anurans living in harsh and unpredictable environmental conditions (e.g., low temperature and/or high seasonality) should decrease reproductive investment because of short periods of activity and poor productivity. Although geographic variations in female life-history traits have been investigated intensively across a wide range of taxa, similar studies in males have been scarce. Here, we examined geographic variation in male testis mass of the brown frog ( Rana kukunoris ) across seven different altitudes on the eastern Tibetan plateau, and tested the hypothesis that relative size of testis mass should increase with increasing temperature and/or decreasing seasonality. In this study, we found male body condition, age and testis mass did not increase with temperature and temperature seasonality, which do not conform to our previous hypothesis, revealing that differences in temperature and temperature seasonality across populations could not drive the evolution of testis size. However, we found a positive correlation between testis mass and body condition or age when controlling for population and the effect of temperature and temperature seasonality, indicative of a condition-dependent expression of testis size. In addition, a correlation between testis mass and operational sex ratio was not significant, suggesting that male–male competition did not lead to increasing levels of sperm competition. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | unknown |
| DOI: | 10.1163/15707563-bja10080 |
| الاتاحة: | http://dx.doi.org/10.1163/15707563-bja10080 https://brill.com/view/journals/ab/72/3/article-p245_6.xml https://brill.com/downloadpdf/journals/ab/72/3/article-p245_6.xml |
| رقم الانضمام: | edsbas.8C121F1B |
| قاعدة البيانات: | BASE |
| DOI: | 10.1163/15707563-bja10080 |
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