Female Feeding and Male Vigilance during Nesting in Greater Snow Geese
Female Feeding and Male Vigilance during Nesting in Greater Snow Geese
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DOI：
10.2307/1368202
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发表时间：
1991-08
期刊：
影响因子：
--
通讯作者：
G. Gauthier;J. Tardif
中科院分区：
文献类型：
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作者：
G. Gauthier;J. Tardif
对北极高寒地区筑巢的大雪鹅的产蛋前历时、雌性摄食活动、雄性警觉性、亲子冲突可能性进行了研究。对于在高纬度(73“N)筑巢的鹅物种来说，产蛋前的时间非常长。鹅在5月27日左右抵达比洛特岛，但产卵的高峰期在6月12-14日左右。在产卵前，配对的雌性有75%的时间在24小时内保持警觉，而雄性有44%的时间在一天中有33%的时间保持警觉。在观察到产蛋鹅的一年中，雌性鹅的喂食量比产蛋前少，在巢中停留的时间增加。时间分配与一天中的时间或产卵前的天数无关。尽管雄性的警觉显然能让雌性在觅食上投入更多的时间，但雄性的警觉行为与雌性的进食并不同步。配对交配记录频繁(0.23次/小时)，观察到2次额外配对交配。雄性比雌性更频繁地参与攻击性互动(2.55vs.0.36攻击性鸟-L hr-i)，并经常攻击相邻的鸟对。与幼鸟配对的比例很低(6.3%)，父母经常攻击他们的幼鸟(1.53只鸟-‘hr-i)。然而，周岁幼崽的存在并不影响配对的时间分配。产卵前的长时间延迟和雌性的紧张取食活动表明，除了春季迁徙期间积累的能量储备外，筑巢场地上的食物摄取也可能是产蛋大雪鹅的重要能量来源。
We studied the duration of the pre-laying period, female feeding activity, male vigilance, and the potential for parent-offspring conflicts in high-Arctic nesting Greater Snow Geese (Chen caerulescens atlantica). The pre-laying period is unusually long for a goose species nesting at high latitudes (73” N). Geese arrived at Bylot Island around 27 May but the peak initiation of egg-laying was around 12-14 June. During pre-laying, paired females fed for 75% and were alert for 6% of the 24-hr day, whereas males fed for 44% and were alert for 33% of the day. In one year that laying geese were observed, females fed less than during pre-laying and time spent at the nest increased. Time budget was not related to time of day or number of days before egg-laying. Although male vigilance apparently enabled females to devote more time to feeding, male alert behavior was poorly synchronized with female feeding. Pair copulations were recorded frequently (0.23/hr) and 2 extra-pair copulations were observed. Males were involved more often than females in aggressive interactions (2.55 vs. 0.36 aggressions bird-l hr-I) and often attacked neighboring pairs. The proportion of pairs with yearlings was low (6.3%) and parents frequently attacked their young (1.53 bird-’ hr-I). However, presence of yearlings did not influence time budget of pairs. The long pre-laying delay and the intense feeding activity of females suggest hat, in addition to energy reserves accumulated during the spring migration, food intake on the nesting ground may also be an important source of energy for laying Greater Snow Geese.