强风降低了信天翁的觅食成功率。

IF 8.1 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Current Biology Pub Date : 2024-12-02 Epub Date: 2024-11-01 DOI:10.1016/j.cub.2024.10.018
Jamie Darby, Richard A Phillips, Henri Weimerskirch, Ewan D Wakefield, José C Xavier, Jorge M Pereira, Samantha C Patrick
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引用次数: 0

摘要

鉴于近年来记录到的极端天气频率较高,而且预计全球极端天气会越来越多,了解动物如何对天气及其物理环境的变化做出反应变得越来越重要。最近的研究表明,跟踪信天翁会避开风暴和与之相关的最强风。6 这种反应的驱动因素目前尚不清楚,但我们假设,动荡的风暴条件限制了觅食的成功率,可能是通过降低食物的可探测性或可获得性,信天翁在可能的情况下转向更有利的条件。我们测试了物理环境--风速、降雨量、水透明度和一天中的时间--对两种觅食策略截然不同的信天翁的觅食活动和成功率的影响。我们用全球定位系统和浸入式记录仪跟踪了鸟岛(南乔治亚岛)上的33只流浪信天翁和48只黑眉信天翁,并分别用胃温记录仪跟踪了19只和7只信天翁的摄食情况,从而深入了解了它们的觅食行为。觅食收益率(捕获猎物的概率和总质量)的降低与暴风雨条件有关,特别是表面捕食的游荡信天翁的强风和暴雨,而黑眉信天翁在强风中捕获猎物的概率降低。我们的研究表明,即使是高度适应风的物种也会经常遇到使觅食变得困难的条件,这为信天翁躲避风暴提供了背景资料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Strong winds reduce foraging success in albatrosses.

Knowledge of how animals respond to weather and changes in their physical environment is increasingly important, given the higher frequency of extreme weather recorded in recent years and its forecasted increase globally.1,2 Even species considered to be highly adapted to extremes of weather, as albatrosses are to strong winds,3,4,5 may be disadvantaged by shifts in those extremes. Tracked albatrosses were shown recently to avoid storms and the strongest associated winds.6 The drivers of this response are so far unknown, though we hypothesize that turbulent storm conditions restrict foraging success, possibly by reducing the detectability or accessibility of food, and albatrosses divert toward more profitable conditions where possible. We tested the impact of the physical environment-wind speed, rainfall, water clarity, and time of day-on feeding activity and success of two species of albatrosses with contrasting foraging strategies. We tracked 33 wandering and 48 black-browed albatrosses from Bird Island (South Georgia) with GPS and immersion loggers, and 19 and 7 individuals, respectively, with stomach-temperature loggers to record ingestions, providing an in-depth picture of foraging behavior. Reduced foraging profitability (probability of prey capture and overall mass) was associated with stormy conditions, specifically strong winds and heavy rain in surface-seizing wandering albatrosses, and the probability of prey capture was reduced in strong winds in black-browed albatrosses. We show that even highly wind-adapted species may frequently encounter conditions that make foraging difficult, giving context to storm avoidance in albatrosses. VIDEO ABSTRACT.

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来源期刊
Current Biology
Current Biology 生物-生化与分子生物学
CiteScore
11.80
自引率
2.20%
发文量
869
审稿时长
46 days
期刊介绍: Current Biology is a comprehensive journal that showcases original research in various disciplines of biology. It provides a platform for scientists to disseminate their groundbreaking findings and promotes interdisciplinary communication. The journal publishes articles of general interest, encompassing diverse fields of biology. Moreover, it offers accessible editorial pieces that are specifically designed to enlighten non-specialist readers.
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