PMID: 8956501Jan 1, 1996Paper

Energy intake and utilisation by nursing bearded seal (Erignathus barbatus) pups from Svalbard, Norway

Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
C LydersenI Gjertz

Abstract

In this study we measure energy intake via milk in nursing bearded seal (Erignathus barbatus) pups and determine how this energy is allocated into metabolism and storage of new tissues. This was accomplished using longitudinal mass gain records and the doubly labelled water technique on nursing pups in combination with cross-sectional data on changes in milk composition from bearded seal mothers. The pups (n = 3) were all less than a week old at the start of the experiments. Pups gained 3.3 +/- 0.4 kg.day-1 of which 50% was fat, 14% protein and 36% water. Average daily water influx for the pups was 69.5 +/- 9.0 ml.kg-1. day-1. Average CO2 production during the study period was 0.99 +/- 0.10 ml.g-1.h-1, which corresponds to a field metabolic rate of 642 +/- 67 kJ.kg-1. day-1, or 6.0 +/- 0.5 times the predicted basal metabolic rate according to Kleiber (1975). The pups drank an average of 7.6 +/- 0.5 kg of milk daily. This corresponds to a daily energy intake of 154 +/- 8 MJ, 47 +/- 14% of which was stored as new body tissue. Despite this high energy intake bearded seal pups do not get as fat as do other nursing phocids. This is in part due to their larger body size but also due to their very active aquatic lifestyle and the lowe...Continue Reading

References

Sep 1, 1990·Journal of Applied Physiology·J J Reilly, M A Fedak
Jan 1, 1971·Canadian Journal of Physiology and Pharmacology·H D FisherJ S Hart
Jan 1, 1995·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·C LydersenK M Kovacs
Jan 1, 1996·Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology·C Lydersen, K M Kovacs
Mar 1, 1993·The American Naturalist·M B KretzmannB J Boeuf

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Citations

May 29, 2000·The Proceedings of the Nutrition Society·O T Oftedal
Jun 4, 2016·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Christopher D Marshall
Feb 19, 2008·The Journal of Experimental Biology·Christopher D MarshallChristian Lydersen
May 29, 2000·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·M ScantleburyJ R Speakman
May 12, 2021·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Alexander Riek

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