Breeding biology of the Svalbard Rock Ptarmigan Lagopus mutus hyperboreus
Breeding biology of the Svalbard Rock Ptarmigan Lagopus mutus hyperboreus
复制标题
DOI：
10.2307/3676630
复制
发表时间：
1985-10
期刊：
影响因子：
--
通讯作者：
J. B. Steen;S. Unander
中科院分区：
文献类型：
--
作者：
J. B. Steen;S. Unander
通过对1981年和1982年斯瓦尔巴岩雷鸟的换羽、体重、产蛋日期、窝卵数、孵化成功率、产卵行为和雏鸟生长情况的记录，研究了斯瓦尔巴岩雷鸟的繁殖生物学。成年母鸡比一岁的母鸡更重，更早蜕皮和下蛋。条件好的母鸡比条件差的母鸡下蛋早，产蛋量大，孵化成功率高。母鸡在孵育期间体重下降约130 g。有小鸡的母鸡在孵化后的头几周体重减轻，而没有小鸡的母鸡体重增加。母鸡在繁殖前的身体状况似乎是决定雏鸡产量的最重要因素。
The breeding biology of Svalbard Rock Ptarmigan was studied by recording moult, body weight, egg laying dates, clutch size, hatching success, brood behaviour and chick growth in 1981 and 1982. Adult hens were heavier and moulted and laid eggs earlier than first year hens. Hens in good condition laid eggs earlier and produced larger clutches with higher hatching success than hens in poor condition. The body weight of hens decreased about 130 g during incubation. Hens with chicks lost weight during the first weeks after hatching, whereas hens without chicks gained weight. The physical condition of hens prior to breeding seemed to be the most important factor in determining chick production.