• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ethology >Contrasting Alternative Hypotheses to Explain Rut-Induced Hypophagia in Territorial Male Chamois
【24h】

Contrasting Alternative Hypotheses to Explain Rut-Induced Hypophagia in Territorial Male Chamois

机译：对比其他假设来解释领土男性羚羊的车辙诱发的下咽痛

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Male ungulates in temperate environments often show a severe reduction in time spent foraging during the mating season. Several hypotheses have been put forward to explain this phenomenon but, so far, no study investigated the proximate mechanisms underlying rut-induced hypophagia in ungulates using alternative mating tactics (AMTs). Between the pre-rut and post-rut of 2011 and 2012, we collected data on activity budgets, parasite burden and androgen levels of territorial and non-territorial male Alpine chamois Rupicapra r. rupkapra in the Gran Paradiso National Park (Italy). We aimed to investigate whether AMTs showed similar reduction in time spent foraging during the mating period and to test the predictions underlying alternative hypotheses thatmay explain rut-induced hypophagia. Only territorial males showed a significant reduction in lime spent foraging during the rut; the lack of correlation between proportion of time spent foraging and androgen metabolites or parasite burden did not fullysupport the physiological and the parasite hypotheses, while the foraging constraint, the energy-saving and the physical rest hypotheses could not be discounted. Territorial males decreased the time spent lying down from the pre-rut to the rut, but not their foraging-to-lying-down ratio. During the mating period, we found negative correlations between time spent foraging or lying down and time spent rutting. Our data suggest that territorial males' behaviour is more consistent with the foraging constraint hypothesis than with the energy-saving hypothesis previously suggested. Yet, during the rut territorial males did not maximise their foraging time, and the optimisation of their energy balance could rather depend upon feeding on relatively high-quality plants. This suggestion - possibly named 'forage quality hypothesis' - now requires further investigations. This work showed that alternative mating behaviours may underlie different patterns of foraging strategies: we suggest that tests of alternativehypotheses to explain rut-induced hypophagia within ungulate populations should not ignore the occurrence of AMTs.
机译：在温带环境中，有蹄类动物的雄性通常在交配季节觅食时间会大大减少。提出了几种假设来解释这种现象，但是到目前为止，尚无研究使用替代交配策略（AMT）研究有蹄类动物由齿t引起的吞咽不足的潜在机制。在2011年至2012年的发情前和发情后，我们收集了有关领土和非领土男性高山羚羊Rupicapra r的活动预算，寄生虫负担和雄激素水平的数据。 rupkapra在大天堂国家公园（意大利）。我们旨在调查在交配期间AMT是否在觅食时间上显示出类似的减少，并检验可能替代的假说的解释，这些假说可能解释了车辙引起的吞噬。在发情期间，只有领土上的男性显示出大量的石灰消耗。觅食时间比例与雄激素代谢物或寄生虫负担之间缺乏相关性并不能完全支持生理假说和寄生虫假说，而不能限制觅食限制，节能和身体休息假说。领地男性减少了从前车辙到车辙的花费时间，但没有减少他们的觅食与躺下比率。在交配期间，我们发现觅食或躺下的时间与发情的时间之间存在负相关关系。我们的数据表明，与先前提出的节能假设相比，领土男性的行为与觅食约束假设更为一致。然而，在发情的地区，雄性并没有最大化其觅食时间，而其能量平衡的优化可能取决于以相对高质量的植物为食。这个建议-可能被称为“饲料质量假说”-现在需要进一步调查。这项工作表明，替代的交配行为可能是觅食策略的不同模式的基础：我们建议对有蹄类动物种群中车辙引起的吞噬的替代假设进行测试，不应忽略AMT的发生。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号