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Marine Ecology Progress Series

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MEPS 612:141-150 (2019)  -  DOI:

Grouping reduces the metabolic demand of a social squid

Benjamin P. Burford1,*, Nicholas Carey1,2, William F. Gilly1, Jeremy A. Goldbogen1

1Hopkins Marine Station of Stanford University, 120 Ocean View Blvd., Pacific Grove, CA 93950, USA
2Scottish Association of Marine Science, Oban, PA37 1QA, Scotland, UK
*Corresponding author:

ABSTRACT: 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.

KEY WORDS: Social facilitation · Metabolism · Group dynamics · Oxygen consumption · Hypoxia · Cephalopod · Squid

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Cite this article as: Burford BP, Carey N, Gilly WF, Goldbogen JA (2019) Grouping reduces the metabolic demand of a social squid. Mar Ecol Prog Ser 612:141-150.

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