• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Factors affecting chick growth in the South Polar Skua (Catharacta maccormicki): food supply, weather and hatching date
【24h】

Factors affecting chick growth in the South Polar Skua (Catharacta maccormicki): food supply, weather and hatching date

机译：影响南极贼鸥（Catharacta maccormicki）小鸡生长的因素：食物供应，天气和孵化日期

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

This study investigated chick growth in a pelagic Antarctic seabird, the South Polar Skua (Catharacta maccormicki). The factors food supply, weather and hatching date were analysed in a population of 54 breeding pairs at King George Island/South Shetland Islands. Food supply was manipulated by offering fish corresponding to 20% of daily energy demand of chicks to half of the breeding pairs every second day. Growth of mass, head, wing and tarsus was followed and related to the treatment, weather conditions, hatching date and interactive effects. Food supply did not limit chick growth in the studied season. Parents seemed to try to feed their chicks at a maximum rate and succeeded in the studied season because the general food supply was very good. Low temperatures and strong winds depressed chick growth. A growth advantage of food-supplemented chicks could be observed when the natural conditions for chick growth were sub-optimal. Chick growth rate was strongly negatively associated with hatching date and worsening weather during the reproductive season could be excluded as explanatory variable for this finding.
机译：这项研究调查了南极上层海鸟南极贼鸥（Catharacta maccormicki）中小鸡的生长。在乔治国王岛/南设得兰群岛的54个繁殖对中，分析了食物供应，天气和孵化日期的因素。通过每隔一天向一半繁殖对提供相当于小鸡每日能量需求20％的鱼来操纵食物供应。跟踪肿块，头，翼和的生长，并与处理，天气状况，孵化日期和交互作用有关。在研究季节，食物供应没有限制雏鸡的生长。父母似乎试图以最大的速度喂养小鸡，并在整个研究季节取得了成功，因为一般的食物供应非常好。低温和强风抑制雏鸡的生长。当小鸡生长的自然条件欠佳时，可以观察到食物补充小鸡的生长优势。雏鸡的生长速度与孵化日期密切相关，可以排除繁殖季节天气恶化作为这一发现的解释变量。

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