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. (2010). Heart rate as a predictor of energy expenditure in undisturbed fasting and incubating penguins.
. J. Exp. Biol., 213(1), 153–60.
Abstract: Heart rate (f(H)) measurement offers the possibility to monitor energy expenditure (EE) in wild animals if the EE/f(H) relationship for the species, physiological stages and activities of interest is known. This relationship has been extensively studied using oxygen consumption rate ( ) measurement in captive, repeatedly handled king penguins (Aptenodytes patagonicus). Unfortunately, the potential effects of stress on the observed relationships resulting from handling and confinement were not considered. This study is the first involving undisturbed animals, and determines the EE/f(H) relationship in naturally fasting and freely incubating or captivity-acclimatized male and female king penguins. EE determination was based on (1) the measurement of body mass loss during periods of phase II fasting, and (2) the calculation of its energy equivalent from changes in body composition, i.e. 23.9 kJ g(-1). f(H) levels in freely incubating and captivity-acclimatized birds were found to be 50-70% lower than those previously reported for resting king penguins during measurements. Significant EE/f(H) relationships were found in freely incubating and captive males and females (R(2)=0.59 to 0.84), with no difference observed between genders. The best overall relationship was obtained by including fasting duration (t, days) in the model: EE=818+43.7xf(H)+36.3t-1.4txf(H) (R(2)=0.91). This equation yielded EE estimates approximately 26% higher than the previously reported 'best' predictive equation in king penguins, and even more so when f(H) was low. This result suggests that stress induces a disproportionate increase of f(H) vs O(2) consumption, and that the use of EE/f(H) relationships obtained in stressed birds could lead to underestimated EE values.
Keywords: Animals, Energy Metabolism, Fasting, Fasting: physiology, Female, Heart Rate, Male, Nesting Behavior, Nesting Behavior: physiology, Spheniscidae, Spheniscidae: physiology,
Programme: 119;394
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Thil M.A. & Groscolas R. (2000).
Abstract: European Association of Zoo and Wildlife Veterinarians, third scientific meeting
Programme: 119
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. (2010). The ORS Vertebrates of Spitsbergen (Svalbard ).
Abstract: congress STRATI 2010 Paris(30viii-02ix) – session 2
Programme: 1005
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Froget G., Butler P.J., Handrich Y. & Woakes A.J. (2001). Heart rate as an indicator of oxygen consumption: influence of body condition in the king penguin. J. Exp. Biol., 204, 2133–2144.
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Van der Putten Nathalie, Verbruggen Cyriel, Ochyra Ryszard, Verleyen Elie, Frenot Yves, . (2010). Subantarctic flowering plants: pre-glacial survivors or post-glacial immigrants?
. J. Biogeogr., 37(3), 582–592.
Keywords: Endemism, glacial refugia, LGM ice cover, palaeobotany, phanerogamic flora, post-glacial immigration, pre-LGM survivors, regionalism, subantarctic islands,
Programme: 136
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Tremblay Y. (1996).
Abstract: D.E.A. Biologie du Comportement
Programme: 109
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Le Cohu R. & Van De Vijver B. (2002). Ann. Limnol., 38(2), 119–132.
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Bried J., Duriez O. & Juin G. (1999). A first case of female-female pairing in the black-faced sheathbill chinios minor. Emu, 99, 292–295.
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Vernon P., Vannier G. & Trehen P. (1998). A comparative approach to the entomological diversity of polar regions. Acta oecologica-international journal of ecology, 19(3), 303–308.
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Weimerskirch H. (1999). The role of body condition on breeding and foraging decisions in albatrosses and petrels..
Abstract: Adams, N. & Slotow, R.H.(Eds), Proceedings of 22 International Ornithological Congress, Durban, Johannesburg: Birdlife South Africa
Programme: 109
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