UNDERWATER SWIMMING AT LOW ENERGETIC COST BY PYGOSCELID PENGUINS

Energetic requirements of under-water swimming in pygoscelid penguins were studied in Antarctica, using respirometry together with a 21 m long swim canal and externally attached devices recording the swimming speed and dive duration of unrestrained animals. Field measurements were compared with measurements of the hydrodynamic properties of an Adelie penguin model in a circulating water tank. Minimium transport costs during underwater swimming in Adelie (Pygoscelis adeliae), chinstrap (P. antarctica) and gentoo (P. papua) penguins averaged 4.9, 3.7 and 7.6 J kg-1 m-1, respectively, at their preferred swimming speeds of 2.2, 2.4 and 1.8 m s-1, allowing the birds to dive aerobically for 110, 130 and 93 s, respectively. From the swim canal measurements, we calculated a drag coefficient (CD) of 0.0368 for a typical Adelie penguin at 2.2 m s-1. This value is significantly lower than the CD of 0.04 of an ideal spindle and the CD of 0.0496 measured on the model in the laboratory. The reasons for this difference are discussed.

[1]  Wilson,et al.  HYDRODYNAMIC ASPECTS OF DESIGN AND ATTACHMENT OF A BACK-MOUNTED DEVICE IN PENGUINS , 1994, The Journal of experimental biology.

[2]  R. Bannasch,et al.  External devices on penguins: how important is shape? , 1994 .

[3]  S. Maloney,et al.  Energetics of Foraging in Breeding Adelie Penguins , 1993 .

[4]  Mark A. Chappell,et al.  Diving Behavior During Foraging in Breeding Adelie Penguins , 1993 .

[5]  Rory P. Wilson,et al.  Activity‐Specific Metabolic Rates from Double Labeled Water Studies: Are Activity Costs Underestimated? , 1993 .

[6]  B. Culik.  Diving heart rates in Adélie penguins (Pygoscelis adeliae) , 1992 .

[7]  T. Williams,et al.  Travel at low energetic cost by swimming and wave-riding bottlenose dolphins , 1992, Nature.

[8]  Alan E. Burger,et al.  Foraging Behavior and Physiological Adaptation for Diving in Thick‐Billed Murres , 1992 .

[9]  J. Croxall,et al.  Diving Behavior and Energetics During Foraging Cycles in King Penguins , 1992 .

[10]  Rory P. Wilson,et al.  SWIMMING ENERGETICS AND PERFORMANCE OF INSTRUMENTED ADELIE PENGUINS (PYGOSCELIS ADELIAE) , 1991 .

[11]  J. Croxall,et al.  The reproductive energetics of gentoo (Pygoscelis papua) and macaroni (Eudyptes chrysolophus) penguins at South Georgia , 1989 .

[12]  C. A. Hui.  Penguin Swimming. II. Energetics and Behavior , 1988, Physiological Zoology.

[13]  S. D. Feldkamp,et al.  Swimming in the California sea lion: morphometrics, drag and energetics. , 1987, The Journal of experimental biology.

[14]  W. Trivelpiece,et al.  Foraging Behavior of Gentoo and Chinstrap Penguins as Determined by New Radiotelemetry Techniques , 1986 .

[15]  Terrie M. Williams,et al.  SWIMMING METABOLISM OF YEARLING AND ADULT HARBOR SEALS PHOCA VITULINA ' , 2016 .

[16]  R. Baudinette,et al.  The energetics of ‘flying’ and ‘paddling’ in water: locomotion in penguins and ducks , 1985, Journal of Comparative Physiology B.

[17]  Rory P. Wilson,et al.  Energy Utilization by Free-Ranging Jackass Penguins, Spheniscus Demersus , 1984 .

[18]  Anthony James Woakes,et al.  Swimming and Diving in Tufted Ducks, Aythya Fuligula , with Particular Reference to Heart Rate and Gas Exchange , 1983 .

[19]  J. Baldwin,et al.  Biochemical Correlates of Swimming and Diving Behavior in the Little Penguin Eudyptula minor , 1983, Physiological Zoology.

[20]  K. Schmidt-Nielsen,et al.  Terrestrial locomotion in penguins: it costs more to waddle. , 1977, Science.

[21]  G. Whittow,et al.  Oxygen cost of swimming in a trained California sea lion. , 1975, Comparative biochemistry and physiology. A, Comparative physiology.

[22]  K Schmidt-Nielsen,et al.  Locomotion: energy cost of swimming, flying, and running. , 1972, Science.

[23]  C. Lenfant,et al.  Respiratory function of blood of the Adélie penguin Pygoscelis adeliae. , 1969, The American journal of physiology.

[24]  J. R. Brett.  The Respiratory Metabolism and Swimming Performance of Young Sockeye Salmon , 1964 .

[25]  P. Ponganis,et al.  Cardiac output and stroke volume in swimming harbor seals , 2004, Journal of Comparative Physiology B.

[26]  Anthony James Woakes,et al.  Energy requirements of Adélie penguin (Pygoscelis adeliae) chicks , 2004, Journal of Comparative Physiology B.

[27]  Rory P. Wilson,et al.  Monitoring Penguins at Sea using Data Loggers , 1992 .

[28]  D. L. Kooyman.  Diverse Divers , 1989, Zoophysiology.

[29]  P. Butler,et al.  The Relationship Between Diving Activity and Oxygen Storage Capacity in the Tufted Duck (Aythya Fuligula) , 1989 .

[30]  Gerald L. Kooyman,et al.  Diverse Divers: Physiology and behavior , 1989 .

[31]  R. Bannasch.  Morphologisch-funktionnelle Untersuchung am Lokomotionsapparat der Pinguine als Grundlage für ein allgemeines Bewegungsmodell des «Unterwasserfluges». II , 1986 .