دورية أكاديمية
Sex ratio of Western Bluebirds Sialia mexicana is mediated by phenology and clutch size.
| العنوان: | Sex ratio of Western Bluebirds Sialia mexicana is mediated by phenology and clutch size. |
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| المؤلفون: | Bartlow AW; Los Alamos National Laboratory, Biosecurity and Public Health, Mailstop M888, Los Alamos, NM 87545, USA., Jankowski MD; Laboratory Services and Applied Science Division, U.S. Environmental Protection Agency, 1200 6 Avenue, Suite 900, Seattle, WA 98101, USA., Hathcock CD; Los Alamos National Laboratory, Environmental Stewardship, Los Alamos, NM 87545, USA., Ryti RT; Neptune and Company, Inc., 1505 15th St #B, Los Alamos, NM 87544, USA., Reneau SL; Los Alamos National Laboratory, PO Box 1663, Los Alamos, NM 87545., Fair JM; Los Alamos National Laboratory, Biosecurity and Public Health, Mailstop M888, Los Alamos, NM 87545, USA. |
| المصدر: | The Ibis [Ibis (Lond 1859)] 2021 Feb 05; Vol. 163 (3), pp. 977-989. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Published for the British Ornithologists' Union by Academic Press Country of Publication: England NLM ID: 100955314 Publication Model: Print Cited Medium: Print ISSN: 0019-1019 (Print) Linking ISSN: 00191019 NLM ISO Abbreviation: Ibis (Lond 1859) Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: [London] Published for the British Ornithologists' Union by Academic Press. |
| مستخلص: | Mothers may produce more of one sex to maximize their fitness if there are differences in the cost of producing each sex or there are differences in their relative reproductive value. Breeding date and clutch size are known to influence offspring sex ratios in birds through sex differences in dispersal, social behaviours, differential mortality, and available food resources. We tested if breeding date, clutch size and drought conditions influenced offspring sex ratios in a sexually size-monomorphic species, the Western Bluebird, by interrogating a 21-year dataset. After controlling for differential mortality, we found that hatch dates late in the breeding season were associated with the production of more females, suggesting that the value of producing males declines as the breeding season progresses. When clutch size was taken into account, small clutches yielded significantly more females late in the breeding season compared to the early and middle parts of the breeding season that produced significantly more males. Large clutches early in the season tended to produce more females, although this was not significant. Drought severity was not correlated with sex ratio adjustment. We propose and discuss several explanations for these patterns, including male offspring, but not female offspring, acting as helpers, increased female nestling provisioning late in the breeding season, differences in food abundance, and egg-laying order. Future work will help to uncover the mechanisms leading to these patterns. Identifying patterns and mechanisms of sex ratio skew from long-term datasets is important for informing predictions regarding life-history trade-offs in wildlife populations. Competing Interests: CONFLICT OF INTEREST The authors declare that they have no conflict of interest. This research does not reflect the official positions and policies of the US EPA. Mention of products/trade names does not constitute recommendation for use by US EPA. |
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| معلومات مُعتمدة: | EPA999999 United States ImEPA Intramural EPA |
| فهرسة مساهمة: | Keywords: breeding date; long-term study; parental investment; sex allocation |
| سلسلة جزيئية: | Dryad 10.5061/dryad.xwdbrv1ck |
| تواريخ الأحداث: | Date Created: 20220708 Latest Revision: 20220716 |
| رمز التحديث: | 20231215 |
| مُعرف محوري في PubMed: | PMC9257600 |
| DOI: | 10.1111/ibi.12935 |
| PMID: | 35801167 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 0019-1019 |
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| DOI: | 10.1111/ibi.12935 |