AGE-RELATED DIFFERENCES IN FORAGING SUCCESS IN THE HERRING GULL (LARUS-ARGENTATUS)
AGE-RELATED DIFFERENCES IN FORAGING SUCCESS IN THE HERRING GULL (LARUS-ARGENTATUS)
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DOI：
10.1016/s0003-3472(83)80030-x
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发表时间：
1983-01-01
期刊：
影响因子：
2.5
通讯作者：
MONAGHAN, P
中科院分区：
文献类型：
--
作者：
GREIG, SA;COULSON, JC;MONAGHAN, P
银鸥的摄食成功率和行为方面，L。1981 ~ 1982年冬季对垃圾场的阿根廷小蠊进行了调查。摄食发生在成年和未成年海鸥的混合群中，竞争非常激烈。比较了5个年龄组（成年和1、2、3、4岁的幼鸟）的鸟龄变化。未成年的银鸥在寻找和从垃圾中提取可食用的东西方面都不如成年银鸥成功。未成熟的鸟类的喂养策略涉及更多的能量消耗/单位的食物获得比成年人，因此效率较低。觅食能力在生命的前4年得到改善，4岁的奥尔兹几乎和成年人一样成功。在这段时间里，觅食技能得到了学习和完善，竞争能力也得到了提高。这与第一次繁殖的时间延迟有关。
Aspects of the feeding success and behavior of herring gulls, L. argentatus, at refuse tips were investigated during the winter of 1981-1982. Feeding occurs in mixed flocks of adult and immature gulls and is highly competitive. Comparisons were made between 5 age-classes of gulls (adults and immature birds in their 1st, 2nd, 3rd and 4th years). Immature herring gulls were less successful than adults both in finding and extracting edible items from the refuse. The feeding strategy of immature birds involved more energy expenditure/unit of food gained than that of adults and was therefore less efficient. Foraging ability improved over the first 4 yr of life, 4 yr olds being almost as successful as adults. Over this period foraging skills are learned and perfected, and competitive ability improves. This relates to the delay in the time of 1st breeding.