Journal article

Variation in plasma leptin levels in response to fasting in Antarctic fur seals (Arctocephalus gazella)

JPY Arnould, MJ Morris, DR Rawlins, IL Boyd

JOURNAL OF COMPARATIVE PHYSIOLOGY B-BIOCHEMICAL SYSTEMS AND ENVIRONMENTAL PHYSIOLOGY | SPRINGER HEIDELBERG | Published : 2002

Abstract

Plasma leptin levels were determined in 8 lactating female and 20 pup Antarctic fur seals (Arctocephalus gazella) during fasting periods of normal duration. Plasma leptin levels ranged from 1.35 3.19 ng x ml(-1) in lactating females and 1.79-4.80 ng x ml(-1) in pups and were not positively correlated with body mass or condition. A negative trend, however, was observed between plasma leptin levels and body condition in lactating females upon their arrival at the colony following a foraging trip (beginning of fast). In accordance with findings in other species, plasma leptin levels dropped significantly (P < 0.02) in response to the 17-19% drop in body mass experienced by pups during fasting. ..

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