Ghrelin, Leptin, and Fatty Acids in Free-Living Callospermophilus lateralis (Golden-Mantled Ground Squirrels) View Full Text


Ontology type: schema:Chapter     


Chapter Info

DATE

2012

AUTHORS

Jessica E. Healy , Gregory L. Florant

ABSTRACT

Although golden-mantled ground squirrels (GMGS, Callospermophilus lateralis) have long been used as laboratory animals, little is known about their physiology as wild-living animals under natural conditions. In examining hormone profiles of serum taken from wild-living GMGS during the euthermic (May–August) season, we found that post-hibernation levels of the orexigenic hormone ghrelin were low, and gradually increased through July and August (pre-hibernation). Females generally had higher concentrations of circulating ghrelin than did males, possibly reflecting the greater energy requirements imposed on them by pregnancy and lactation. Leptin concentrations were extremely low throughout the summer months, possibly reflecting the lean condition of field GMGS, particularly on their exit from hibernation in May. These data provide preliminary evidence that seasonal changes in energy-modulating hormones may be informed by different energy requirements inherent between the sexes. More... »

PAGES

519-529

Book

TITLE

Living in a Seasonal World

ISBN

978-3-642-28677-3
978-3-642-28678-0

From Grant

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/978-3-642-28678-0_45

DOI

http://dx.doi.org/10.1007/978-3-642-28678-0_45

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1052058663


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