• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Biology Bulletin >Breeding Biology of the Parakeet Auklet (Cyclorrhynchus psittacula) on Talan Island (Northern Sea of Okhotsk)
【24h】

Breeding Biology of the Parakeet Auklet (Cyclorrhynchus psittacula) on Talan Island (Northern Sea of Okhotsk)

机译：塔兰岛（鄂霍次克海北部）长尾小鹦鹉Auklet（Cyclorrhynchus psittacula）的繁殖生物学

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

The breeding biology of the parakeet auklet was studied in 1989-2012 on Talan Island, which is located in Tauiskaya Bay in the Sea of Okhotsk. In 2008, its population amounted to 3000-4000 individuals, and 70% of the birds nested on the western slope. In 2008, the average density of nesting on this part of the island was 0.018 pairs/m(2). Most of nests were noted along the slope base (5-20 m a.s.l.), while the largest density in these sites was 0.035 pairs/m(2). The time of egg laying varied from June 4 to June 14, and the longterm average annual date fell on June 8. The latest date of egg laying (June 12-14) was observed in 1995, 1999, and 2001, which was due to the time of ice crushing nearby the island. Hatching in different years started on July 9-19 and ended in late July-early August. The weight of hatchlings was 20-33 g (on average, 27.9 g). In different years, the maximum weight of 22-to 29-day-old nestlings was 173-263 g. By the time of fledging, their weight had decreased to 168-252 g, while the daily increase in weight for the periods of chicks staying in the nests was 4.06-6.47 g in different years. Young birds left the island in the period from the middle of August to the first ten-day period of September; the average age of fledglings was 31-35 days in different years. The reproductive success of the parakeet auklet varied from 0 to 83.3% (on average, 44.3%) and was mainly determined by the survival of chicks at different stages of their development. The main limiting factor of the reproductive success is the reduction of forage availability and abundance, which is largely due to unfavorable weather conditions (long cyclones with storm winds), as well as various hydrobiological changes in the environment. The influence of anxiety and predation was not significant with respect to adult birds, but these factors can cause death of clutches and chicks, and, being combined with unfavorable weather conditions, their effect increases.
机译：1989年至2012年，在鄂霍次克海Tauiskaya湾的塔兰岛上研究了长尾小鹦鹉Auklet的繁殖生物学。在2008年，它的人口达到3000-4000人，而70％的鸟类筑巢在西坡上。在2008年，该岛部分的平均筑巢密度为0.018对/ m（2）。多数巢沿斜坡基部（5-20​​ m a.s.l.）被发现，而这些位置的最大密度为0.035对/ m（2）。产卵的时间从6月4日到6月14日不等，长期的年度平均日期是6月8日。最近的产卵日期（6月12-14日）是在1995、1999和2001年观察到的，这是由于岛附近冰冻的时间。不同年份的孵化始于7月9日至19日，结束于7月下旬至8月初。幼体的重量为20-33克（平均27.9克）。在不同的年份，22到29天大的雏鸟的最大体重为173-263克。到出雏时，它们的体重已减少到168-252 g，而在不同年份中，雏鸡在巢中停留期间的日增重为4.06-6.47 g。从8月中旬到9月的第一个10天，幼鸟离开了该岛。不同年份的雏鸟平均年龄为31-35天。长尾小鹦鹉的繁殖成功率从0到83.3％（平均为44.3％）不等，主要取决于雏鸡在不同发育阶段的存活率。繁殖成功的主要限制因素是草料供应和丰度的下降，这主要是由于不利的天气条件（长旋风和暴风）以及环境中各种水生生物变化所致。焦虑和捕食对成年鸟类的影响并不显着，但是这些因素会导致of和小鸡死亡，并且，加上不利的天气条件，它们的影响会增强。

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