Search
Now showing items 1-10 of 14
Quantitative fatty acid signature analysis: A new method of estimating predator diets
(2004-05)
Accurate estimates of the diets of predators are required in many areas of ecology, but for many
species current methods are imprecise, limited to the last meal, and often biased. The diversity of
fatty acids and their ...
Seasonal changes in buoyancy and diving behaviour of adult grey seals
(2000-08)
Phocid seals go through dramatic seasonal changes in body mass and composition as a result of
the spatial and temporal separation of foraging, reproduction and moulting. These changes in body
fat content and body mass ...
Polar Bear Diets and Arctic Marine Food Webs: Insights from Fatty Acid Analysis
(2008-11)
We used quantitative fatty acid signature analysis (QFASA) to examine the diets of 1738
individual polar bears (Ursus maritimus) sampled across the Canadian Arctic over a 30-year span.
Polar bear foraging varied over ...
Demonstration of the deposition and modification of dietary fatty acids in pinniped blubber using radiolabelled precursors
(2004-07)
Radioisotopes are commonly used to study the in vivo metabolism and deposition of dietary fatty
acids in adipose tissue. The application of this approach to pinnipeds is problematic because of
their large mass and blubber ...
Linking movement, diving, and habitat to foraging success in a large marine predator
(2006-12)
Establishing where and when predators forage is essential to understanding trophic interactions,
yet foraging behavior remains poorly understood in large marine carnivores. We investigated the
factors leading to foraging ...
Fatty acid profiles in the gonads of the sea urchin Strongylocentrotus droebachiensis on natural algal diets
(2008)
We examined fatty acid (FA) compositions of gonads of the green sea urchin Strongylocentrotus
droebachiensis collected from a grazing aggregation (front) at the edge of a kelp bed and from
barrens dominated by coralline ...
Fatty acids tracers for native and invasive macroalgae in an experimental food web
(2009)
We assessed the potential of fatty acid (FA) markers for tracing primary production from an
invasive green alga (Codium fragile ssp. fragile) and a native kelp (Saccharina longicruris) through
2 trophic levels in an ...
Interspecific and intraspecific variation in proximate, mineral, and fatty acid composition of milk in old world fruit bats (Chiroptera : Pteropodidae)
(2001-01)
We examine the effect of body mass on milk composition among Old World fruit bats, including
Pteropus pumilus (0.175 kg), Pteropus rodricensus (0.265 kg), Pteropus hypomelanus (0.571 kg), and
Pteropus vampyrus (1.133 ...
Effect of a low-fat diet on body composition and blubber fatty acids of captive juvenile harp seals (Phoca groenlandica)
(2000-01)
We investigated the effects of a change from a high-fat diet to a low-fat diet of differing
fatty acid (FA) composition on the body composition and blubber FA of five captive juvenile harp
seals. Seals that had been ...
Metabolism of dietary cetoleic acid (22 : 1n-11) in mink (Mustela vison) and gray seals (Halichoerus grypus) studied using radiolabeled fatty acids
(2006-07)
Cetoleic acid (22:1n-11) is a good indicator of diet in marine predators and has proven to be an
important fatty acid (FA) when using adipose tissue FA composition to study diet in marine mammals
and seabirds. Feeding ...