Plasma lipid metabolites provide information on mass change over several days in captive western sandpipers

Citation
Td. Williams et al., Plasma lipid metabolites provide information on mass change over several days in captive western sandpipers, AUK, 116(4), 1999, pp. 994-1000
Citations number
24
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
AUK
ISSN journal
0004-8038 → ACNP
Volume
116
Issue
4
Year of publication
1999
Pages
994 - 1000
Database
ISI
SICI code
0004-8038(199910)116:4<994:PLMPIO>2.0.ZU;2-I
Abstract
Individual quality is often assessed using a static measure of body conditi on, such as size-corrected body mass. Plasma metabolites have the potential to provide information on the dynamics of physiological state and thus may be better measures of individual performance capacity land fitness). We st udied relationships between rate of mass change and circulating levels of t riglycerides, glycerol, and beta-hydroxybutyrate in captive Western Sandpip ers (Calidris mauri). The rate of mass change over one and two days prior t o blood sampling was positively related to residual triglyceride (controlli ng for body mass at sampling) and negatively related to residual glycerol a nd residual beta-hydroxybutyrate. The relationship between metabolite level and mass change was still apparent over a seven-day interval for glycerol, but not for the other two metabolites. In a stepwise multiple regression o f mass change over two days (controlling for body mass), only beta-hydroxyb utyrate and glycerol were entered in the model at P < 0.15. Analysis of gro up means for seven sampling events showed that body-mass change in a group of individuals was related to mean circulating levels of each metabolite, i .e. to a characteristic metabolite profile. Thus, it may be feasible to emp loy these metabolites to assess habitat quality based on animal performance (e.g. at migratory stopover sites), or to understand the effects of climat ic or anthropogenic factors on the health and survival of animals.