Zhao Dapeng, Feng Peishan
Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin 300387, China.
Curr Zool. 2015 Dec;61(6):966-971. doi: 10.1093/czoolo/61.6.966. Epub 2015 Dec 1.
Climate change, such as elevated temperatures, may facilitate biological invasion. Aquatic animal systems are more vulnerable to biological invasion when the temperature rises. Animal personality also plays an important role in the possibility of successful establishment of invasive species. However, it is still unclear how personality traits of invasive species will respond to global warming. This study focuses on juveniles of red swamp crawfish , an invasive poikilothermic species with wide distribution throughout the world, and explores how slight temperature increases influence three personality traits (activity, boldness and aggressiveness) of . For each personality, individual variation is to be presented in condition of the same temperature. Individual personality values can significantly increase with the subtle rising of water temperature. Significant correlations among activity, boldness and aggressiveness are found at any temperature stage, and such relationships are maintained at a similar level in the face of different temperatures. It is most likely that significant expressions of personality traits may be an ecological compensation strategy to offset increased metabolic costs when faced with small temperature increases. Aggression syndromes are formed due to stable linkages between personality traits, in order to acquire allopatric resources efficiently and establish a new population in this species.
气候变化，如气温升高，可能会促进生物入侵。当温度上升时，水生动物系统更容易受到生物入侵的影响。动物个性在入侵物种成功定殖的可能性中也起着重要作用。然而，入侵物种的个性特征将如何应对全球变暖仍不清楚。本研究聚焦于红沼泽螯虾的幼体，这是一种分布广泛的入侵变温物种，探讨轻微升温如何影响其三种个性特征（活跃度、大胆程度和攻击性）。对于每种个性，将在相同温度条件下呈现个体差异。随着水温的细微上升，个体个性值会显著增加。在任何温度阶段，活跃度、大胆程度和攻击性之间都存在显著相关性，并且面对不同温度时，这种关系都维持在相似水平。个性特征的显著表达很可能是一种生态补偿策略，以抵消面对小幅升温时增加的代谢成本。由于个性特征之间的稳定联系形成了攻击综合征，以便该物种有效地获取异域资源并建立新种群。
