THE INFLUENCE OF AGE AND SEX ON WING-TIP PATTERN IN ADULT BLACK-HEADED GULLS LARUS-RIDIBUNDUS

被引:10
|
作者
ALLAINE, D [1 ]
LEBRETON, JD [1 ]
机构
[1] CTR ECOL FONCT & EVOLUT,CNRS,F-34033 MONTPELLIER,FRANCE
关键词
D O I
10.1111/j.1474-919X.1990.tb00279.x
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
A discriminant equation based on bill‐depth and total head‐ and bill‐length is provided to sex adult Black‐headed Gulls Larus ridibundus. This equation is used to sex birds of known age. Relationships between age and morphometrics and between age and the black extent on the wing are then investigated both in males and females. Size of birds did not change with age but the black extent on the wing tended to decrease with age in both sexes. The tendency to become lighter with age may he an expression of senescence. Copyright © 1990, Wiley Blackwell. All rights reserved
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页码:560 / 567
页数:8
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