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首页> 外文期刊>Polar biology >Provisioning strategies and growth patterns of Light-mantled Sooty Albatrosses Phoebetria palpebrata on Macquarie Island
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Provisioning strategies and growth patterns of Light-mantled Sooty Albatrosses Phoebetria palpebrata on Macquarie Island

机译：麦格理岛上的浅色烟熏信天翁Phoebetria palpebrata的供应策略和生长方式

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摘要

Provisioning regimes and growth of Light-mantled Sooty Albatrosses (LMSA) (Phoebetria palpebrata) were investigated on subantarctic Macquarie Island using an automatic tracking system and automatic weighing nests. The nests were deployed under five chicks in the post-brood provisioning period in 2000 and 2001. Adults typically utilised a cyclical foraging strategy consisting of a long foraging trip followed by three to four shorter trips. Chicks received an average (±SE) of 37.5 ± 2.3 kg of food in the post-brood provisioning period and were fed every 1.6 ±0.1 days with a mean meal size of 520 ± 10 g. Chicks grew at a rate of 61.3±1.0 g day~(-1) to a peak mass of 4.4±0.1 kg. Mean chick fledging mass was 3.0 ±0.1 kg. LMSA on Macquarie Island fed their chicks more frequently and showed a lower mean trip duration than conspecifics at South Georgia, which is likely related to proximity of productive Antarctic shelf waters, differences in prey availability and competition with other Procellariiformes.
机译：使用自动跟踪系统和自动称重巢，研究了南极麦格理岛上的光罩乌黑信天翁（LMSA）（Phoebetria palpebrata）的供应方式和生长情况。巢在2000年和2001年的繁殖后时期被部署在五只小鸡的下方。成虫通常采用周期性觅食策略，包括长觅食行程，然后进行三到四个较短的觅食行程。雏鸡在饲养后的平均时间里接受了37.5±2.3公斤的食物（±SE），每1.6±0.1天喂一次，平均进餐量为520±10 g。小鸡以61.3±1.0 g·day〜（-1）的速率生长至4.4±0.1 kg的峰值质量。雏鸡平均幼雏质量为3.0±0.1 kg。麦格理岛上的LMSA比南部佐治亚州的同伴更频繁地喂食小鸡，平均旅行持续时间较短，这很可能与生产性南极大陆架水域的接近程度，猎物的可获得性差异以及与其他Procellariiformes的竞争有关。

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