Grouping reduces the metabolic demand of a social squid
Grouping reduces the metabolic demand of a social squid
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DOI：
10.3354/meps12880
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发表时间：
2019-03-07
影响因子：
2.5
通讯作者：
Goldbogen, Jeremy A.
中科院分区：
文献类型：
--
作者：
Burford, Benjamin P.;Carey, Nicholas;Goldbogen, Jeremy A.
许多鱿鱼是社会性头足类动物，具有极高的新陈代谢率。然而，所有先前对社会性头足类动物新陈代谢的研究都利用了个体动物。我们测量了群居乌贼 Doryteuthis opalescens 群体和单独个体的耗氧量，以研究群体在缺氧条件下对能量需求和表现的影响。平均而言，同种动物的存在使常规代谢率降低了 21%，但并不影响临界氧分压，低于该分压则无法维持稳定的摄氧率。此外，在群体中更频繁地观察到与放松相关的色彩行为，而在独居个体中更频繁地观察到与压力或警惕相关的行为。我们假设，通过潜在地减少能量消耗，分组可能与允许社会性鱿鱼利用氧气供应有限的栖息地有关，这可能会造成生理限制。
Many squids are social cephalopods and demonstrate exceptionally high metabolic rates. However, all prior investigations of metabolism in social cephalopods have utilized individual animals. We measured oxygen consumption of the social squid Doryteuthis opalescens both in groups and with solitary individuals to examine the influence of grouping on energy demand and performance under hypoxic conditions. On average, the presence of conspecifics reduced routine metabolic rate by 21% but did not influence the critical oxygen partial pressure below which a stable rate of oxygen uptake is not maintained. In addition, displays of chromatic behaviors associated with relaxation were observed more frequently in groups, whereas behaviors associated with stress or vigilance were observed more frequently in solitary individuals. We hypothesize that through a potential reduction in energy consumption, grouping may be relevant in allowing social squids to exploit habitats with marginal oxygen availability that may impose a physiological constraint.