...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The condor >Nest and Chick Survival and Colony-Site Dynamics of Least Terns in the U.S. Virgin Islands
【24h】

Nest and Chick Survival and Colony-Site Dynamics of Least Terns in the U.S. Virgin Islands

机译：美属维尔京群岛最小燕鸥的巢和小鸡生存和殖民地动态

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Abstract. We report nest and chick survival and colony-site dynamics of the Least Tern (Sternula antillarum). These results are the first for the Caribbean and were derived with likelihood-based approaches from 4640 nests and 44 chicks fitted with transmitters monitored in 52 colonies at St. Croix, U.S. Virgin Islands, 2003–2006. Managed colonies excluded, overall daily nest survival (±SE) was 0.92 ± 0.03 (period survival = 0.18). Daily nest survival of managed colonies (fenced) was significantly higher (0.97 ± 0.02; period survival = 0.51). Variation in nest survival was best explained by a negative linear trend in daily survival, influenced by year, rain, large colony size, and nesting habitat. Daily nest-survival rates at sandy beaches (0.94 ± 0.02), offshore cays (0.93 ± 0.005), and saltflats (0.91 ± 0.02) did not differ significantly. The period survival of chicks was 0.30 ± 0.11. Estimated fledglings per nest attempt were 0.06. Demographic assessments suggested that higher reproductive rates are req...
机译：抽象。我们报告了最小燕鸥（Sternula antillarum）的巢和小鸡生存和殖民地动态。这些结果首次出现在加勒比海地区，是从2003-2006年在美属维尔京群岛圣克鲁瓦52个殖民地监测的4640个巢和44个装有发射器的雏鸡中基于似然方法得出的。排除管理菌落，总的每日巢生存（±SE）为0.92±0.03（周期生存= 0.18）。受管理菌落的日巢存活（有围栏）明显更高（0.97±0.02;周期存活= 0.51）。巢生存率的变化最好用每日生存率的负线性趋势来解释，该趋势受年，雨天，大菌落大小和筑巢栖息地的影响。沙滩（0.94±0.02），离岸珊瑚礁（0.93±0.005）和盐滩（0.91±0.02）的每日巢生存率没有显着差异。雏鸡的周期存活率为0.30±0.11。每次筑巢尝试的估计幼雏为0.06。人口统计表明，需要较高的生殖率。

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