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Shoebill Balaeniceps rex foraging behaviour in the Bangweulu Wetlands, Zambia

机译：Shoebill Balaeniceps獭在赞比亚Bangweulu湿地的觅食行为

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摘要

Shoebills (Balaeniceps rex) are endemic to large, well-vegetated wetlands in central-eastern Africa. Populations are believed to be declining throughout their range and knowledge about their ecology, behaviour and distribution is vital for their effective conservation. In this study we quantified and explored Shoebill foraging behaviour across habitat types and seasons through behavioural observations in the Bangweulu Wetlands, Zambia. Behaviours associated with foraging were standing, walking and flying. Shoebills spent 85% of their time engaged in low-energy activities, mainly by standing still and preening. They caught on average one prey every 8.3 h and catfish Clarias spp. were the most common prey caught (71% of prey in 170.1 h observed). Despite small sample sizes (n = 17.7 h during the breeding season), we found an indication that the proportion of successful strikes was higher during the breeding season (five of seven strikes successful) compared to non-breeding (16 of 70 strikes successful). This study provides useful information for effective conservation management, by showing the importance of catfish as prey for Bangweulu Shoebills, the possible increased prey capture during the breeding season, and indicating the importance of the two habitat types: floating vegetation and flooded grassland (capture rates 0.10 and 0.29 prey h(-1), respectively).
机译：Shoebills（Balaeniceps rex）是非洲中东部非洲大片，植被茂盛的湿地的地方病。人们认为种群在整个范围内都在减少，关于其生态，行为和分布的知识对于其有效的保护至关重要。在这项研究中，我们通过对赞比亚邦圭鲁湿地的行为观察，量化和探索了Shoebill在生境类型和季节之间的觅食行为。与觅食相关的行为是站立，行走和飞行。 Shoebills花费了其85％的时间从事低能耗活动，主要是通过保持姿势和梳妆。他们平均每8.3小时捕捞一只猎物，而fish鱼会感染Clarias spp。是最常见的猎物（在170.1小时内观察到的猎物为71％）。尽管样本量较小（繁殖季节中n = 17.7 h），但我们发现有迹象表明，繁殖季节成功罢工的比例（成功罢工7次中的5个）比非繁殖情况（成功罢工70次中的16次）高。这项研究通过展示of鱼作为Bangweulu Shoebills的猎物的重要性，在繁殖季节捕捞的捕捞物可能增加以及指出两种生境类型的重要性：漂浮的植被和淹没的草地（捕捞率），为有效的保护管理提供了有用的信息。猎物h（-1）分别为0.10和0.29）。

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