Accelerometry estimates field metabolic rate in giant Australian cuttlefish Sepia apama during breeding

Publication Type:Journal Article
Year of Publication:2010
Authors:N. L. Payne, Gillanders, B. M., Seymour, R. S., Webber, D. M., Snelling, E. P., Semmens, J. M.
Journal:Journal of Animal EcologyJournal of Animal Ecology
Pagination:In press
ISBN Number:1365-2656
Keywords:acoustic telemetry, Cephalopoda, diel rhythm, dynamic body acceleration, energetics, mating display, protein catabolism, S apama, semelparity

Summary 1. Estimating the metabolic rate of animals in nature is central to understanding the physiological, behavioural and evolutionary ecology of animals. Doubly labelled water and heart-rate methods are the most commonly used approaches, but both have limitations that preclude their application to some systems. 2. Accelerometry has emerged as a powerful tool for estimating energy expenditure in a range of animals, but is yet to be used to estimate field metabolic rate in aquatic taxa. We combined two-dimensional accelerometry and swim-tunnel respirometry to estimate patterns of energy expenditure in giant Australian cuttlefish Sepia apama during breeding. 3. Both oxygen consumption rate () and swimming speed showed strong positive associations with body acceleration, with coefficients of determination comparable to those using similar accelerometers on terrestrial vertebrates. Despite increased activity during the day, field metabolic rate rarely approached , and night-time was similar to that at rest. 4. These results are consistent with the life-history strategy of this species, which has a poor capacity to exercise anaerobically, and a mating strategy that is visually based. With the logistical difficulties associated with observation in aquatic environments, accelerometry is likely to prove a valuable tool for estimating energy expenditure in aquatic animals.

Short Title:J. Anim. Ecol.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith