A condition index for African penguin Spheniscus demersus chicks
A condition index for African penguin Spheniscus demersus chicks
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DOI：
10.2989/1814232x.2014.915232
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发表时间：
2014-01-01
影响因子：
1.2
通讯作者：
Veen, J.
中科院分区：
文献类型：
--
作者：
Lubbe, A.;Underhill, L. G.;Veen, J.
晚食海鸟雏鸟的身体状况与从父母那里得到的食物量直接相关，而食物量又取决于海上的喂养条件。因此，身体状况指数是评估不同繁殖群体之间食物供应差异的有用工具。采用分位数回归技术，以最大和最小生长与结构尺寸的关系为基础，建立了非洲企鹅黑斑蝶雏鸟的身体状况指数。这被认为是比较不同大小和未知年龄的雏鸡群体的身体状况最合适的指标。在此研究的基础上，提出了关于形态测量、样本量和采样间隔的建议，以便在整个分布范围内有效地比较不同繁殖群体之间非洲企鹅雏鸟的状况。
The body condition of altricial seabird chicks is directly related to the amount of food received from their parents, which depends on feeding conditions at sea. An index of body condition is therefore a useful tool for assessing variation in food availability between different breeding colonies. Quantile regression techniques were used to develop a body condition index for African penguin Spheniscus demersus chicks, based on maximum and minimum growth relative to structural size. This is considered the most appropriate index for comparing the body condition of groups of chicks, varying in size and of unknown age, between breeding colonies. Based on this study, recommendations are made with regard to morphometric measurements, sample size and the sampling interval required to compare effectively the condition of African penguin chicks between breeding colonies throughout their distributional range.