Skip to content

Research at St Andrews

Buoyancy does not affect diving metabolism during shallow dives in Steller sea lions Eumetopias jubatus

Research output: Contribution to journalArticle

DOI

Author(s)

A. Fahlman, G. D. Hastie, D. A. S. Rosen, Y. Naito, A. W. Trites

School/Research organisations

Abstract

Changes in buoyancy due to seasonal or abnormal changes in body composition are thought to significantly affect the energy budget of marine mammals through changes in diving costs. We assessed how changes in body composition might alter the foraging efficiency of Steller sea lions Eumetopias jubatus by artificially adjusting the buoyancy of trained individuals. PVC tubes were attached to harnesses worn by Steller sea lions that had been trained to feed at fixed depths (10 to 30 m) and to resurface inside a metabolic dome. Buoyancy was altered to simulate the naturally occurring differences in body composition reported in adult females (similar to 12 to 26% subcutaneous fat). Diving characteristics (transit times and time at depth) and aerobic energy expenditure (gas exchange) were measured. We found that foraging cost decreased with the duration of the dive and increased with dive depth. However, changes in body composition did not affect the diving metabolic rate of Steller sea lions for dives between 10 and 30 m. We propose that Steller sea lions may adjust their diving lung volume to compensate for changes in buoyancy to avoid additional metabolic costs.

Close

Details

Original languageEnglish
Pages (from-to)147-154
Number of pages8
JournalAquatic Biology
Volume3
Issue number2
DOIs
Publication statusPublished - 2008

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Effects of impulsive noise on marine mammals: investigating range-dependent risk

    Hastie, G., Merchant, N., Goetz, T., Russell, D. J. F., Thompson, P. & Janik, V. M., Jul 2019, In : Ecological Applications. 29, 5, 10 p., e01906.

    Research output: Contribution to journalArticle

  2. Empirical determination of severe trauma in seals from collisions with tidal turbine blades

    Onoufriou, J., Brownlow, A., Moss, S., Hastie, G. & Thompson, D., 14 May 2019, In : Journal of Applied Ecology. Early View, 13 p.

    Research output: Contribution to journalArticle

  3. Harbour seals avoid tidal turbine noise: implications for collision risk

    Hastie, G. D., Russell, D. J. F., Lepper, P., Elliott, J., Wilson, B., Benjamins, S. & Thompson, D., Mar 2018, In : Journal of Applied Ecology. 55, 2, p. 684-693 10 p.

    Research output: Contribution to journalArticle

  4. Seals and shipping: quantifying population risk and individual exposure to vessel noise

    Jones, E. L., Hastie, G. D., Smout, S., Onoufriou, J., Merchant, N. D., Brookes, K. L. & Thompson, D., Dec 2017, In : Journal of Applied Ecology. 54, 6, p. 1930-1940

    Research output: Contribution to journalArticle

Related by journal

  1. Aquatic Biology (Journal)

    Nora Nell Hanson (Reviewer)
    Jul 2014

    Activity: Publication peer-review and editorial work typesPeer review of manuscripts

Related by journal

  1. Benthic habitat properties can delay settlement in an estuarine fish (Sciaenops ocellatus)

    Havel, L. N., Fuiman, L. A. & Ojanguren, A. F., 17 Sep 2015, In : Aquatic Biology. 24, 2, p. 81-90 10 p.

    Research output: Contribution to journalArticle

  2. Vocal behaviour and feeding ecology of killer whales Orcinus orca around Shetland, UK

    Deecke, V. B., Nykänen, M., Foote, A. & Janik, V. M., 2011, In : Aquatic Biology. 13, p. 79-88

    Research output: Contribution to journalArticle

  3. Clicking for calamari: toothed whales can echolocate squid Loligo pealeii

    Madsen, P. T., Wilson, M., Johnson, M., Hanlon, R. T., Bocconcelli, A., de Soto, N. A. & Tyack, P. L., 2007, In : Aquatic Biology. 1, 2, p. 141-150 10 p.

    Research output: Contribution to journalArticle

ID: 35076314