Chen Jingfeng, Qi Yin, Wu Yayong, Wang Xiaocui, Tang Yezhong
Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China.
PeerJ. 2019 Jun 28;7:e7205. doi: 10.7717/peerj.7205. eCollection 2019.
Ecological factors related to predation risks and foraging play major roles in determining which behavioral traits may mediate life history trade-offs and, therefore, the pace-of-life syndrome (POLS) structure among behavioral, physiological, and life-history traits. It has been proposed that activity/exploration or risk-taking behaviors are more likely to impact resource acquisition for organisms (individuals, populations, and species) foraging on clumped and ephemeral food sources than for organisms foraging on abundant and evenly distributed resources. In contrast, vigilance or freezing behavior would be expected to covary with the pace of life when organisms rely on food items requiring long bouts of handling. Nevertheless, it remains unclear how general this pattern is. We tested this hypothesis by examining the associations between exploration/risk-taking behaviors and metabolic/performance traits for the viviparous agamid lizard, . This species forages on sparse and patchy food sources. The results showed positive correlations between exploration and endurance capacity, and between bite force and risk-taking willingness. Our current findings, in conjunction with our previous work showed no correlations between freezing behavior and performance in this species, support the idea that behaviors in life-history trade-offs are natural history-dependent in , and provide evidence that behavioral types play functional roles in life history trade-offs to supporting POLS hypothesis.
与捕食风险和觅食相关的生态因素在决定哪些行为特征可能介导生活史权衡，进而决定行为、生理和生活史特征之间的生活节奏综合征（POLS）结构方面起着主要作用。有人提出，与在丰富且分布均匀的资源上觅食的生物相比，活动/探索或冒险行为更有可能影响在密集且短暂的食物来源上觅食的生物（个体、种群和物种）获取资源。相反，当生物依赖需要长时间处理的食物时，警惕或静止行为预计会与生活节奏相关。然而，这种模式的普遍性仍不清楚。我们通过研究胎生鬣蜥的探索/冒险行为与代谢/性能特征之间的关联来检验这一假设。该物种在稀疏且分散的食物来源上觅食。结果表明探索与耐力之间以及咬合力与冒险意愿之间存在正相关。我们目前的研究结果，结合我们之前的工作表明该物种的静止行为与性能之间没有相关性，支持了生活史权衡中的行为依赖于自然史的观点，并提供了行为类型在生活史权衡中发挥功能作用以支持POLS假设的证据。
