Boldness predicts foraging behaviour, habitat use and chick growth in a central place marine predator.

IF 2.3 2区 环境科学与生态学 Q2 ECOLOGY Oecologia Pub Date : 2024-05-01 Epub Date: 2024-05-13 DOI:10.1007/s00442-024-05557-4
Jorge M Pereira, Jaime A Ramos, Filipe R Ceia, Lucas Krüger, Ana M Marques, Vitor H Paiva
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Abstract

Animal personality can shape individual's fitness. Yet, the mechanistic relationship by which individual's personality traits lead to variations in fitness remains largely underexplored. Here, we used novel object tests to measure boldness of chick-provisioning Cory's shearwaters (Calonectris borealis) from a coastal colony off west Portugal, and deployed GPS loggers to study their at-sea behaviour and distribution. We then tested whether boldness predicts individual differences in adult's trophic ecology and variations in chick growth, to assess potential implications of personality-specific foraging behaviours. Foraging effort was higher for shyer than for bolder individuals, which, during short forays, exhibited larger foraging ranges, and foraged in regions of higher and more variable bathymetry. This suggests that nearby the colony bolder individuals expanded their foraging area to maximize resource acquisition and increase the probability of foraging success. When endeavouring to longer distances, bolder individuals exhibited comparably shorter foraging ranges and targeted low bathymetry regions, likely with enhanced prey availability, while shyer individuals exhibited much larger foraging ranges indicating greater flexibility when foraging in oceanic realms. Despite such differences between bolder and shyer individuals their isotopic niches were similar. Yet, chicks raised by bolder parents grew at a faster rate than those raised by shyer parents. Together, our results suggest that differences in resource acquisition strategies could play a key role through which individual's boldness may influence breeding performance, even when individuals have similar isotopic preferences.

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胆大预测了一种中心地带海洋掠食者的觅食行为、栖息地利用和雏鸟成长。
动物的个性可以影响个体的适应性。然而,个体性格特征导致适应性变化的机理关系在很大程度上仍未得到充分探索。在这里,我们使用了新颖的物体测试来测量葡萄牙西部沿海雏鸟饲养地的科里剪鸥(Calonectris borealis)的胆量,并部署了全球定位系统记录仪来研究它们的海上行为和分布。然后,我们测试了胆量是否能预测成鸟营养生态的个体差异和雏鸟生长的变化,以评估个性特异性觅食行为的潜在影响。与胆大的个体相比,胆小的个体的觅食努力程度更高,它们在短途觅食时表现出更大的觅食范围,并在水深更高和水深变化更大的区域觅食。这表明,在群落附近,胆大的个体扩大了觅食范围,以最大限度地获取资源,提高觅食成功的概率。在远距离觅食时,胆大个体的觅食范围相对较短,并以水深较低的区域为目标,这可能是为了提高猎物的可获得性;而胆小个体的觅食范围要大得多,这表明它们在海洋区域觅食时具有更大的灵活性。尽管胆大的个体和胆怯的个体之间存在这种差异,但它们的同位素壁龛是相似的。然而,胆子大的亲本抚养的雏鸟比胆子小的亲本抚养的雏鸟长得快。综上所述,我们的研究结果表明,即使个体的同位素偏好相似,资源获取策略的差异也可能是影响个体繁殖表现的关键因素。
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来源期刊
Oecologia
Oecologia 环境科学-生态学
CiteScore
5.10
自引率
0.00%
发文量
192
审稿时长
5.3 months
期刊介绍: Oecologia publishes innovative ecological research of international interest. We seek reviews, advances in methodology, and original contributions, emphasizing the following areas: Population ecology, Plant-microbe-animal interactions, Ecosystem ecology, Community ecology, Global change ecology, Conservation ecology, Behavioral ecology and Physiological Ecology. In general, studies that are purely descriptive, mathematical, documentary, and/or natural history will not be considered.
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