BIOGEOGRAPHY OF PROCELLARIIFORM FORAGING STRATEGIES: DOES OCEAN PRODUCTIVITY INFLUENCE PROVISIONING?
BIOGEOGRAPHY OF PROCELLARIIFORM FORAGING STRATEGIES: DOES OCEAN PRODUCTIVITY INFLUENCE PROVISIONING?
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蜂巢状觅食策略的生物地理学：海洋生产力是否影响供给？
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
K. Hyrenbach
中科院分区：
文献类型：
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作者：
Cheryl L. Baduini;K. Hyrenbach
总结最短的觅食行程，并随着行程长度的增加而减少。在双峰物种中，短期（平均值= 9.8%BM第-1天）的分娩率显著高于长期觅食旅行（平均值= 2.6%BM第-1天）。然而，海鸟通过每次长途旅行交替几次短途觅食来增加有效的交付率。由此产生的有效的双猎物交付率，结合短期和长期的觅食旅行后，是无法区分的物种与单峰觅食策略。此外，我们测试了是否使用双峰供应策略与海洋生产力的空间和时间模式。我们观察到更远的觅食地（长途旅行目的地）的目标B y双峰物种的叶绿素a浓度显着更高。相反，我们没有发现两种类型的foraging理由内的叶绿素a浓度的变化的差异，这表明海洋生产力是同样可预测的长期和短期供应旅行的目标区域内。我们的研究结果强调了海洋生产力模式的重要性，作为海洋鸟类觅食策略和分布在B芦苇季节的决定因素。
SUMMARY the shortest foraging trips and decreased with increasing trip length. Among bimodal species, delivery rates were significantly greater for short (mean = 9.8 % BM day-1) than for long foraging trips (mean = 2.6 % BM day -1). However, seabirds increased their effective delivery rates by alternating several short foraging trips for every long excursion. The resulting effective dual prey delivery rates, af ter combining short and long foraging trips, were undistinguishable from those for species with a unimodal foraging strategy. Additionally, we tested whether the use of a bimodal provisioning strategy was related to the spatial and temporal patterns of ocean productivity. We o bserved significantly greater chlorophyll a concentrations within the more distant foraging grounds (long trip destinations) targeted b y bimodal species. Conversely, we did not detect a difference in the variability of chlorophyll a concentrations within the two types of f oraging grounds, suggesting that ocean productivity is equally predictable within the areas targeted by long and short provisioning trips. Our r esults highlight the importance of ocean productivity patterns as determinants of marine bird foraging strategies and distributions during the b reeding season.