印度南达帕老虎保护区湍急河流中白腹苍鹭的觅食生态学

IF 0.7 4区生物学 Q3 ORNITHOLOGY

Waterbirds Pub Date : 2022-07-29 DOI:10.1675/063.044.0401

H. S. Mondal, G. Maheswaran

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引用次数: 0

摘要

摘要濒临灭绝的白腹苍鹭(Ardea insignis)是一种鱼食性视觉觅食动物，喜欢在湍急的淡水河流中觅食。本研究重点研究了2013-2017年南达帕老虎保护区湍急河流中白腹苍鹭的觅食行为。在浅水区觅食时，苍鹭的觅食时间和尝试次数均显著高于浅水区(觅食时间:61.45±15.55%;罢工率:1.70罢工/小时)。苍鹭朝上游觅食时捕鱼成功率高(0.62条/hr)，捕鱼效率高(44.62%)。白腹苍鹭面朝上游捕获的小鱼(≤9 cm)居多(60.98%)，面朝下游捕获的大鱼(≤18 cm)居多(60.92%)。这些发现揭示了这种稀有和极度濒危的鸟类是如何适应湍急的河流生活的，以及这些独特的地方对其保护的重要性。

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Foraging Ecology of White-Bellied Heron (Ardea insignis) in the Fast-Flowing Rivers of Namdapha Tiger Reserve, Arunachal Pradesh, India

Abstract. The critically endangered White-bellied Heron (Ardea insignis) is a piscivorous visual forager that prefers to forage in fast-flowing freshwater rivers. This study highlights White-bellied Heron foraging behavior in the fast-flowing rivers of Namdapha Tiger Reserve during 2013–2017. The herons spent significantly more time and also made more foraging attempts while foraging in shallow water (foraging time: 61.45 ± 15.55%; strike rate: 1.70 strikes/hr). Herons were more successful in catching fishes when they foraged facing upstream (capture rate: 0.62 fishes caught/hr) with increased capture efficiency (44.62%). White-bellied Herons caught the majority (60.98%) of small sized fishes (≤ 9 cm) while facing upstream and the majority (60.92%) of large sized fishes (> 18 cm) while facing downstream. These findings shed light on the manner in which this rare and critically endangered bird is adapted to life on fast-flowing rivers and the importance of these unique places for its conservation.

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来源期刊

Waterbirds 生物-鸟类学

CiteScore

1.30

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Waterbirds is an international scientific journal of the Waterbird Society. The journal is published four times a year (March, June, September and December) and specializes in the biology, abundance, ecology, management and conservation of all waterbird species living in marine, estuarine and freshwater habitats. Waterbirds welcomes submission of scientific articles and notes containing the results of original studies worldwide, unsolicited critical commentary and reviews of appropriate topics.