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首页> 外文OA文献 >Responses to threat in a freshwater invader: Longitudinal data reveal personality, habituation and robustness to changing water temperatures in the ‘killer shrimp’ Dikerogammarus villosus (Crustacea: Amphipoda).
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Responses to threat in a freshwater invader: Longitudinal data reveal personality, habituation and robustness to changing water temperatures in the ‘killer shrimp’ Dikerogammarus villosus (Crustacea: Amphipoda).

机译：对淡水入侵者威胁的应对措施：纵向数据揭示了“杀手虾” Dikerogammarus villosus（甲壳纲：Amphipoda）中水温变化的个性，习惯和稳健性。

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Freshwater biodiversity and ecosystem integrity are under threat from biological invasions. The ‘killer shrimp’ Dikerogammarus villosus is a highly predatory amphipod which has spread readily across Central Europe and recently the U.K. and its arrival has been associated with the significant loss of resident species. Despite this, studies of its behavioural ecology are sparse, even though its behaviour may contribute to its invasion success. For the first time we investigated anti-predator ‘fleeing’ behaviour in D. villosus and how this changed with water temperature. Three key patterns emerged from our analysis. First, within a particular temperature condition there are moderate but consistent among-individual differences in behaviour. These are driven by a combination of mean level among-individual differences and within-individual relative consistency in behaviour, and provide the key marker for animal personalities. Second, the fleeing responses were not influenced by temperature and thirdly, regardless of temperature, all individuals appeared to habituate to a repeated non-dangerous stimulus, indicating a capacity for individual-learning. We suggest that the anti-predator behaviour of D. villosus contributes to its rapid spread and that consistent among-individual differences in behaviour may promote biological invasions across heterogeneous conditions. Robustness to changing water temperatures may also be potentially advantageous, particularly in an era of global climate change, where average temperatures could be elevated and less predictable
机译：淡水生物多样性和生态系统的完整性受到生物入侵的威胁。 “杀手虾” Dikerogammarus villosus是一种高度掠食性的两栖动物，已在中欧和英国最近广泛传播，它的到来与常住物种的大量流失有关。尽管如此，对其行为生态学的研究仍然很少，尽管其行为可能有助于其入侵成功。我们首次调查了绒毛衣藻中反捕食者的“逃逸”行为，以及这种行为如何随水温变化而变化。我们的分析得出了三个关键模式。首先，在特定温度条件下，个体之间存在中等但一致的行为差异。这些是由个体差异的平均水平和个体内行为的相对一致性共同驱动的，并提供了动物个性的关键标志。其次，逃避反应不受温度的影响；其次，无论温度如何，所有个体似乎都习惯于反复的非危险刺激，表明其具有学习的能力。我们建议，D。villosus的抗捕食者行为有助于其迅速传播，并且行为之间个体间的一致差异可能会促进跨异质条件的生物入侵。鲁棒地改变水温也可能具有潜在的优势，尤其是在全球气候变化的时代，在该时代，平均温度可能会升高而难以预测

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    Briffa M; Jones N; MacNeil C;

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  • 年度 2016
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