The effect of metabolic phenotype on sociability and social group size preference in a coral reef fish
The effect of metabolic phenotype on sociability and social group size preference in a coral reef fish
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DOI：
10.1002/ece3.7672
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发表时间：
2021-05-25
影响因子：
2.6
通讯作者：
McCormick, Mark I.
中科院分区：
文献类型：
--
作者：
Killen, Shaun S.;Nadler, Lauren E.;McCormick, Mark I.
尽管社会群体中的个体经历了更低的捕食风险，并更一致地寻找食物斑块，但群体成员之间可能存在对食物的竞争。标准代谢率(SMR)较高的个体可能不太善于社交，优先考虑食物获取而不是防御，而较高的最大代谢率(MMR)可能会通过增强竞争能力来调节社交能力。因此，理论上，SMR较高的个体可能更喜欢较小的群体，而MMR较大的个体可能更喜欢较大的群体。我们研究了红腹黄尾短毛鼠的代谢表型、社会性和群体大小选择之间的联系。研究人员对个体进行了三种关联性测试：(A)在两条鱼或不吃鱼之间做出选择；(B)在五条鱼或不吃鱼之间做出选择；(C)在两条鱼和五条鱼之间做出选择。前两个测试量化了社交能力，而第三个测试测量了相对的群体规模选择。尽管SMR和社交能力之间没有联系，但MMR较高的鱼比MMR较低的个体更具社会性。虽然没有发现MMR和群体规模选择之间的相关性，但有微弱的证据表明，如果有的话，SMR较高的个体更喜欢更大的群体，这与我们的假设相反。由于库宁是一种活跃的鱼类，大部分时间都在SMR之上活动，这一结果可能表明，社交能力和SMR之间的联系可能会根据物种的常规行为而变化。如果竞争能力允许个人在群体中获得资源，那么社交能力和MMR之间的联系可能会出现。虽然代谢特征对群体规模选择没有显著影响，但食物可获得性或捕食风险的变化会改变代谢对群体规模选择的影响。
Although individuals within social groups experience reduced predation risk and find food patches more consistently, there can be competition for food among groupmates. Individuals with a higher standard metabolic rate (SMR) may be less social, to prioritize food acquisition over defense, while a greater maximum metabolic rate (MMR) may modulate sociability through increased competitive ability. Therefore, in theory, individuals with a higher SMR may prefer smaller groups and those with greater MMR may prefer larger groups. We examined links among metabolic phenotype, sociability, and choice of group size in the redbelly yellowtail fusilier Caesio cuning. Individuals were exposed to three association tests: (a) a choice between two fish or zero fish; (b) a choice between five fish or zero fish; and (c) a choice between two fish and five fish. The first two tests quantified sociability while the third measured relative group size choice. Although there was no link between SMR and sociability, fish with a higher MMR were more social than those individuals with a lower MMR. While no correlation was found between MMR and group size choice, there was weak evidence that, if anything, individuals with a higher SMR preferred larger groups, contrary to our hypothesis. As C. cuning is an active fish that spends a large proportion of time operating above SMR, this result could suggest that the links between sociability and SMR may shift depending on a species' routine behavior. Links between sociability and MMR may arise if competitive ability allows individuals to obtain resources within groups. Although metabolic traits had no significant influence on group size choice, variation in food availability or predation risk could alter the effects of metabolism on group size choice.