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Age at first breeding of Bank Cormorants, Phalacrocorax neglectus, and Cape Cormorants, P-capensis

机译:Bank 、,和and角首次繁殖的年龄

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摘要

Some Bank Cormorants, Phalacrocorox neglectus, breed when two years old, but others defer breeding until aged three years. Their mean age at breeding is about 2.5 years. Although some Cape Cormorants, P. capensis, breed when 1.5 years old or less, their breeding success may be poor at this age and the usual pattern of summer breeding probably means that most do not breed until they are about two years old. Poor feeding conditions may cause postponement of breeding by Cape Cormorants until they are three years old.
机译:一些河岸ne(Ph)在两岁时繁殖,而其他则推迟到三岁才繁殖。它们的平均繁殖年龄约为2.5岁。尽管有些角Cape(Cape Cormorants)(P。capensis)在1.5岁或以下的年龄繁殖,但在这个年龄它们的繁殖成功率可能很低,而且夏季繁殖的通常模式可能意味着大多数人直到两岁左右才开始繁殖。恶劣的饲养条件可能会使Cape角的繁殖推迟到三岁。

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