...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Southeastern naturalist >Survival and Cause-specific Mortality of Adult Female Eastern Wild Turkeys in a Bottomland Hardwood Forest
【24h】

Survival and Cause-specific Mortality of Adult Female Eastern Wild Turkeys in a Bottomland Hardwood Forest

机译：成人女性东部野生火鸡在底部硬木森林中的生存和造成特异性死亡率

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

Meleagris gallopavo (Wild Turkey) population dynamics are greatly influenced by female survival, and high female-survival rates may offset low reproductive rates and maintain stability in populations characterized by low productivity. Additionally, reproduction may incur a cost to annual survival, given the physiological stress associated with breeding, and predation risks associated with incubation and brood-rearing. We used radio-telemetry and known-fate modeling to quantify annual survival and identify mortality causes of 54 adult female Meleagris gallopavo ssp. silvestris (Eastern Wild Turkey) tracked during 2002-2004 and 2007-2010 in a population characterized by low productivity in a bottomland hardwood forest in Louisiana. We detected 31 mortalities in which predation was the leading cause (87%), primarily attributed to Canis latrans (Coyote) and Lynx rufus (Bobcat). We estimated an annual survival rate of 0.58 (95% CI = 0.47-0.68) with no evidence of seasonal variation. This level of survival appeared to be sufficient to offset low productivity; the population was considered healthy and stable during the study period. Annual survival rates of females that incubated a nest were lower than reproductively inactive females, although confidence intervals overlapped considerably. The mechanisms underlying survival differences between reproductive classes were not entirely clear because survival of nesting females did not greatly decrease during incubation and brood-rearing seasons relative to non-nesters as would be expected under the hypothesis of increased predation risk during reproduction periods. Future studies should aim to better elucidate the links between reproduction and survival in Eastern Wild Turkey populations because this information will have important management ramifications in the southeast, where region-wide declines in productivity have been observed.
机译：Meleagris Gallopavo（野生土耳其）人口动态受到女性生存的大大影响，高性能率可能抵消低生殖率，并保持群体的稳定性，其特征在于生产率低。另外，鉴于与育种相关的生理压力以及与孵育和育龄相关的捕食风险，繁殖可能会产生成本。我们使用了无线电遥测和已知的建模来量化年生存率，识别54个成年女性Meleagris Gallopavo SSP的死亡率。在2002-2004和2007-2010期间，在路易斯安那州的底层硬木林中生产效率的人口中追踪的Silvestris（东部野生土耳其）。我们发现了31个死亡率，其中捕食是主要原因（87％），主要归因于Canis Latrans（Coyote）和Lync rufus（Bobcat）。我们估计年生存率为0.58（95％CI = 0.47-0.68），没有季节性变化的证据。这种生存水平似乎足以抵消低生产率;在研究期间，人群被认为是健康和稳定的。孵育巢的年度存活率低于生殖活动的女性，尽管置信区间大大重叠。生殖类别之间生存差异的机制并不完全清楚，因为嵌套女性的生存在孵化期间没有大大降低，相对于非嵌套的育龄季节，如在繁殖期间增加的掠夺风险的假设下所期望的。未来的研究应该旨在更好地阐明东部野生土耳其群体的繁殖和生存之间的联系，因为这些信息将在东南部具有重要的管理后果，其中广泛的生产力下降。

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