... attributed. Summary: Oxidation and egestion, metabolic rates and their rhythms in house geckos and pygmy shrews fed with three isotopically enriched fatty acids. Circadian rhythm Diet Fatty acid Nutrient oxidation Stable isotope Unsaturation Suncus etruscus Hemidactylus turcicus...

... used to prepare media (−23.6±0.5‰). The differences between the δ 13 C values of the pure sugars and the ovaries were primarily caused by the presence of additional carbon sources in the diet, especially corn meal and yeast ( Table 1 ). As expected, stable isotope ratios in the ovaries remained...

...Nathan Wolf; Seth D. Newsome; Marilyn L. Fogel; Carlos Martínez del Rio SUMMARY The analysis of hydrogen stable isotopes (∂D) is a potentially powerful tool for studying animal ecology. Unlike other stable isotopes used in ecological research, however, we are less familiar with the physiological...

... the time it takes to rebuild their GIT and, thus, resume migration as soon as possible. * Author for correspondence ( [email protected] ) 22 11 2011 © 2012. 2012 blackcap migration stopover gastrointestinal tract stable isotope Birds that migrate long distances spend...

... using delta notation. These values were calibrated using a standard mixture consisting of ethyl and methyl esters of 14:0, 16:0, 18:0 and 20:0 supplied by Indiana University Stable Isotope Reference Materials, where r 2 of the known versus expected relationship was >0.98. A three-level...

... rates, carbon and nitrogen stable isotope analysis in manatee epidermis is useful in summarizing average dietary intake over a long period of time rather than assessing recent diet. In addition to turnover rate, a diet–tissue discrimination value of 2.8‰ for 13 C was calculated for long-term captive...

... with dietary sugar. Using indirect calorimetry, i.e. measurement of rates of O 2 consumption and CO 2 production, in combination with carbon stable isotope techniques, we found that nectarivorous bats Glossophaga soricina use recently ingested sugars to provide ∼78%of the fuel required for oxidative metabolism...

[email protected] ) 2 5 2007 © The Company of Biologists Limited 2007 2007 energetics hummingbird stable isotope turnover Hummingbirds have served as exceptional model organisms for the study of foraging energetics due to their high visibility and cooperative nature in the wild, ease...

...Michelle E. H. Helinski; Rebecca Hood-Nowotny; Leo Mayr; Bart G. J. Knols The potential use of stable isotopes to study mosquito mating was investigated by tracing the fate of labelled semen into spermathecae.[ 13 C]glucose was incorporated in the diet of the malaria mosquito Anopheles arabiensis...

... on the amaranth diet had higher 13 C enrichment (2.0±0.2‰) than bats on the soya diet (0.1±0.1‰). Our results support recent hypotheses of the effect of nutrition on diet-tissue isotopic discrimination and turnover rate, and further shows that blood stable isotope analysis is an adequate approach to track...

... a method using 15 N in orally administered protein to measure protein synthesis rates in fish over relatively long periods, the aim being to use procedures that are as non-invasive and repeatable as possible. The use of stable isotopes to measure protein metabolism is well established in terrestrial...