Social Group Size and Shelter Availability Influence Individual Metabolic Traits in a Social Fish
Social Group Size and Shelter Availability Influence Individual Metabolic Traits in a Social Fish
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社会群体规模和庇护所可用性影响社会鱼类的个体代谢特征
DOI：
10.1093/lob/obab032
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发表时间：
2021
影响因子：
1.5
通讯作者：
Chretien Emmanuelle
中科院分区：
文献类型：
--
作者：
Chretien Emmanuelle
群居生活在动物物种中很普遍，既有成本，也有收益。同种的存在可以限制或增强个体行为的表达，并且最近的社会环境被认为会影响以后的行为反应，即使个体是单独的。然而，人们对社会群体规模如何影响个体生理特征的表达知之甚少，包括代谢率。有一些证据表明，浅滩可以降低鱼类的代谢率，但这一变量可能会受到栖息地条件，如住房的可用性通过密度依赖过程。我们调查了社会群体的大小和住房的可用性如何影响欧亚小鱼（Phoxinus phoxinus）的代谢率估计呼吸。在鱼被隔离之前和之后，在由特定组大小（n= 4或8）和庇护所可用性（在实验池中存在或不存在植物庇护所）组成的社会处理中，对鱼进行呼吸测定试验。在呼吸测定试验的一半持续时间内，将植物遮蔽物放置在呼吸测定仪上，从而可以估计两种条件下（存在或不存在植物遮蔽物）的最小日间和夜间代谢率。还估计了整个试验期间的标准代谢率（SMR）、最大代谢率（MMR）和需氧范围。白天和夜间的最低代谢率估计，而在存在的植物庇护所低于估计时，在没有植物庇护所，之前和之后的个人被安置在他们的社会治疗。在社会化处理后，与8组鱼相比，4组鱼的SMR更高，而MMR没有差异。在社会治疗过程中，植物庇护所的可用性并没有影响SMR或MMR。我们的研究结果表明，社会群体的大小可能会直接影响个人的能量需求，突出的重要性，了解群体的大小与能量消耗相关的生理特征的变化的作用。
Group living is widespread among animal species and yields both costs and benefits. Presence of conspecifics can restrict or enhance the expression of individual behavior, and the recent social environment is thought to affect behavioral responses in later contexts, even when individuals are alone. However, little is known about how social group size influences the expression of individual physiological traits, including metabolic rates. There is some evidence that shoaling can reduce fish metabolic rates but this variable may be affected by habitat conditions such as shelter availability via density-dependent processes. We investigated how social group size and shelter availability influence Eurasian minnow (Phoxinus phoxinus) metabolic rates estimated by respirometry. Respirometry trials were conducted on fish in isolation before and after they were housed for 3 weeks in a social treatment consisting in a specific group size (n= 4 or 8) and shelter availability (presence or absence of plant shelter in the experimental tank). Plant shelter was placed over respirometers for half of the duration of the respirometry trials, allowing estimation of minimum daytime and nighttime metabolic rates in both conditions (in the presence or absence of plant shelter). Standard metabolic rate (SMR), maximum metabolic rate (MMR), and aerobic scope were also estimated over the entire trial. Minimum daytime and nighttime metabolic rates estimated while in presence of plant shelter were lower than when estimated in absence of plant shelter, both before and after individuals were housed in their social treatment. After the social treatment, SMRs were higher for fish that were held in groups of 4 as compared with those of fish held in groups of 8, while MMR showed no difference. Plant shelter availability during the social treatments did not influence SMR or MMR. Our results suggest that social group size may directly influence energy demands of individuals, highlighting the importance of understanding the role of group size on variations in physiological traits associated with energy expenditure.
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发表时间：
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发表时间：
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作者：
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作者：
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影响因子：
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