Productive foraging sites enhance maternal health and impact offspring fitness in a capital breeding species
Productive foraging sites enhance maternal health and impact offspring fitness in a capital breeding species
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富有生产力的觅食地点可增强孕产妇健康并影响主要繁殖物种的后代健康
DOI：
10.1101/2023.10.27.563439
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Fouda L
中科院分区：
文献类型：
--
作者：
Fouda L
觅食生态是有机体生命的重要组成部分，但觅食伴随着风险和能量成本。种群表现出不止一种摄食策略的物种，如海龟，是研究摄食生态如何影响生活史特征，繁殖和跨代影响的良好系统。在这里，我们调查了如何在卡波佛得角群岛的红海龟（Caretta caretta）筑巢的喂养生态与生殖输出和后代健身。通过碳、氮稳定同位素分析，研究了雌龟在繁殖期前和繁殖期内的摄食生态，并将碳、氮稳定同位素比值与雌龟和幼龟的适合度性状进行了相关分析。我们发现，雌性海龟在更高的营养位置喂养产生更大的离合器。我们还发现，δ 13 C值较少耗尽的雌性，典型的生产性觅食区，有更大的脂肪储备，不太可能被水蛭寄生虫感染，并产生更重的后代。与δ 13 C值消耗较少的未感染母亲相比，δ 13 C值消耗较少的感染母亲的后代在爬行和自我扶正试验中表现最好。总的来说，我们的研究表明，利用生产区域的成年雌性红海龟建立了影响其繁殖成功和后代健康的资本储备。总之，我们坚持的建议，不是所有的觅食栖息地是平等的，可以改变人口的健身。
Feeding ecology is an essential component of an organism’s life, but foraging comes with risks and energetic costs. Species in which populations exhibit more than one feeding strategy, such as sea turtles, are good systems for investigating how feeding ecology impacts life-history traits, reproduction and carried over effects across generations. Here, we investigated how the feeding ecology of loggerhead sea turtles (Caretta caretta) nesting at the Cabo Verde archipelago correlates with reproductive outputs and offspring fitness. We determined the feeding ecology of female turtles before and during the breeding season from stable isotope analysis of carbon and nitrogen, and correlated isotopic ratio with female and hatchling fitness traits. We found that female turtles feeding at higher trophic positions produced larger clutches. We also found that females with less depleted δ13C values, typical of productive foraging areas, had greater fat reserves, were less likely to be infected by leech parasites, and produced heavier offspring. The offspring of infected mothers with less depleted δ13C values performed best in crawling and self-righting trials than those of non-infected mothers with less depleted δ13C values. Overall, our study shows adult female loggerheads that exploit productive areas build capital reserves that impact their reproductive success and offspring fitness. Together, we uphold the suggestion that not all foraging habitats are equal, and can alter the fitness of populations.
影响因子：
4.8
作者：
Newsome, Seth D.;Tinker, M. Tim;Estes, James A.
通讯作者：
Estes, James A.
DOI：
--
发表时间：
1994
期刊：
影响因子：
--
作者：
J. Buskirk;L. Crowder
通讯作者：
L. Crowder
影响因子：
5.2
作者：
Hays, Graeme C.;Scott, Rebecca
通讯作者：
Scott, Rebecca