Long-term survey of sea turtles (Caretta caretta) reveals correlations between parasite infection, feeding ecology, reproductive success and population dynamics.
Long-term survey of sea turtles (Caretta caretta) reveals correlations between parasite infection, feeding ecology, reproductive success and population dynamics.
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DOI：
10.1038/s41598-020-75498-4
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发表时间：
2020-10-29
影响因子：
4.6
通讯作者：
Eizaguirre C
中科院分区：
文献类型：
--
作者：
Lockley EC;Fouda L;Correia SM;Taxonera A;Nash LN;Fairweather K;Reischig T;Durão J;Dinis H;Roque SM;Lomba JP;Dos Passos L;Cameron SJK;Stiebens VA;Eizaguirre C
对宿主-寄生虫相互作用的长期监测对于了解感染对宿主适应性和种群动态的影响至关重要。在对佛得角斑头海龟(Caretta Aretta)种群筑巢的长达八年的调查中，我们确定了马尔戈Ozobranchus margoi的时空变化，Ozobranchus margoi是一种以海龟纤维乳头状瘤病毒为媒介而闻名的食血水蚤。我们量化了Margoi与海龟的δ15N和δ13C稳定同位素的关系，以确定感染发生的地方。然后我们测量了感染对生殖和后代健康的影响。我们发现，寄生虫流行率从2010年的10%上升到2017年的33%。对宿主皮肤样本的稳定同位素分析表明，传播发生在宿主的觅食场所。有趣的是，我们发现个体大小和感染对海龟繁殖成功率有显著的交互作用。具体地说，受感染的小型雌性海龟较少产生状况较差的后代，而相比之下，受感染的大型海龟产生更大的卵子大小和更大的后代。我们将这种相互作用解释为，在感染后，生殖策略从押注对冲转向终端投资的大小依赖的证据，改变了种群动态。感染和生殖之间的这种联系强调了使用长期监测来量化疾病动态随时间的影响的重要性。
Long-term monitoring of host-parasite interactions is important for understanding the consequences of infection on host fitness and population dynamics. In an eight-year survey of the loggerhead sea turtle (Caretta caretta) population nesting in Cabo Verde, we determined the spatiotemporal variation of Ozobranchus margoi, a sanguivorous leech best known as a vector for sea turtle fibropapilloma virus. We quantified O. margoi association with turtles’ δ15N and δ13C stable isotopes to identify where infection occurs. We then measured the influence of infection on reproduction and offspring fitness. We found that parasite prevalence has increased from 10% of the population in 2010, to 33% in 2017. Stable isotope analysis of host skin samples suggests transmission occurs within the host’s feeding grounds. Interestingly, we found a significant interaction between individual size and infection on the reproductive success of turtles. Specifically, small, infected females produced fewer offspring of poorer condition, while in contrast, large, infected turtles produced greater clutch sizes and larger offspring. We interpret this interaction as evidence, upon infection, for a size-dependent shift in reproductive strategy from bet hedging to terminal investment, altering population dynamics. This link between infection and reproduction underscores the importance of using long-term monitoring to quantify the impact of disease dynamics over time.
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影响因子：
3.1
作者：
Frick, Michael G.;Williams, Kristina L.;Martins, Helen R.
通讯作者：
Martins, Helen R.
影响因子：
2
作者：
Bertrand, M.;Marcogliese, D. J.;Magnan, P.
通讯作者：
Magnan, P.
影响因子：
2.4
作者：
Booth, David T.;Feeney, Roisin;Shibata, Yui
通讯作者：
Shibata, Yui
DOI：
10.1590/s0074-02762011000400016
发表时间：
2011-06-01
期刊：
Memórias do Instituto Oswaldo Cruz
影响因子：
--
作者：
Rabinovich, Jorge Eduardo;Kitron, Uriel Dan;Chaves, Luis Fernando
通讯作者：
Chaves, Luis Fernando
影响因子：
3.7
作者：
Greenblatt, RJ;Work, TM;Casey, JW
通讯作者：
Casey, JW