Stable isotope analysis as a minimal-invasive method for dietary studies on the highly endangered Common hamster (Cricetus cricetus)

Mammalia ◽  
2018 ◽  
Vol 82 (6) ◽  
pp. 600-606 ◽  
Author(s):  
Anna Roswag ◽  
Nina I. Becker ◽  
Eva Millesi ◽  
Matthias S. Otto ◽  
Sara Ruoss ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Food Samples ◽  
Minimal Invasive ◽  
Food Sources ◽  
Stable Isotope Ratios ◽  
Cricetus Cricetus ◽  
Invasive Method ◽  
Agricultural Areas

Abstract This study applied the analysis of stable isotope ratios as a minimally-invasive tool to estimate the diet of Cricetus cricetus for the first time. We took hair and food samples of three different populations of C. cricetus and analyzed stable carbon and nitrogen ratios. The stable isotope ratios in hamster hairs differed significantly within and between populations according to different sampling seasons and animal ages. Additionally, the isotopic signatures of potential food samples differed between sampling sites and food categories. The isotopic mixing models illustrated that diet composition varied with season and food availability. During the summer season hamsters living in agricultural areas mainly fed on green and ripe crop. In contrast to this, during the winter season ripe crop was the main food component for hamsters in agricultural areas while hamsters living in urban areas fed almost exclusively on nuts. These are, despite a wide variety of available food sources, most suitable for hoarding in the burrow. We conclude that stable isotope analysis of hamster hairs is an appropriate minimal-invasive method to investigate correlations between available and consumed food sources throughout the overall distribution of this species.

Food sources for the bivalve Corbicula japonica in the foremost fishing lakes estimated from stable isotope analysis

2006 ◽  
Vol 72 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Akihide KASAI ◽  
Haruhiko TOYOHARA ◽  
Akiko NAKATA ◽  
Tsunehiro MIURA ◽  
Nobuyuki AZUMA
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Food Sources ◽  
Corbicula Japonica

Food sources of the pearl oyster in coastal ecosystems of Japan: Evidence from diet and stable isotope analysis

2008 ◽  
Vol 76 (3) ◽  
pp. 704-709 ◽  
Author(s):  
Kayoko Fukumori ◽  
Misa Oi ◽  
Hideyuki Doi ◽  
Noboru Okuda ◽  
Hitomi Yamaguchi ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Pearl Oyster ◽  
Coastal Ecosystems ◽  
Food Sources

Stable isotope analysis reveals partitioning in prey use by Kajikia audax (Istiophoridae), Thunnus albacares, Katsuwonus pelamis, and Auxis spp. (Scombridae) in the Eastern Tropical Pacific of Ecuador

2021 ◽  
Vol 19 (4) ◽  
Author(s):  
Rigoberto Rosas-Luis ◽  
Nancy Cabanillas-Terán ◽  
Carmen A. Villegas-Sánchez
Keyword(s):  
Stable Isotope ◽  
Food Web ◽  
Stable Isotope Analysis ◽  
Trophic Ecology ◽  
Isotope Analysis ◽  
Middle Level ◽  
Food Sources ◽  
Thunnus Albacares ◽  
Katsuwonus Pelamis ◽  
Δ13c And Δ15n

Abstract Kajikia audax, Thunnus albacares, Katsuwonus pelamis, and Auxis spp. occupy high and middle-level trophic positions in the food web. They represent important sources for fisheries in Ecuador. Despite their ecological and economic importance, studies on pelagic species in Ecuador are scarce. This study uses stable isotope analysis to assess the trophic ecology of these species, and to determine the contribution of prey to the predator tissue. Isotope data was used to test the hypothesis that medium-sized pelagic fish species have higher δ15N values than those of the prey they consumed, and that there is no overlap between their δ13C and δ15N values. Results showed higher δ15N values for K. audax, followed by T. albacares, Auxis spp. and K. pelamis, which indicates that the highest position in this food web is occupied by K. audax. The stable isotope Bayesian ellipses demonstrated that on a long time-scale, these species do not compete for food sources. Moreover, δ15N values were different between species and they decreased with a decrease in predator size.

scholarly journals Stable Isotope Analysis of a Submarine Ice Cliff at Explorers Cove, McMurdo Sound, Antarctica

1984 ◽  
Vol 30 (104) ◽  
pp. 112-115 ◽  
Author(s):  
William L. Stockton ◽  
Ted E. DeLaca ◽  
Michael J. Deniro
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Sea Water ◽  
Isotope Analysis ◽  
Ice Cores ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Mcmurdo Sound

AbstractStable isotope ratios and salinities of ice samples obtained from a submarine ice cliff at Explorers Cove demonstrate that the upper parts of the ice cliff have frozen directly from sea-water and are an underwater expression of permafrost, whereas the lower parts appear to be partially glacial in origin. These results indicate that there may be ice cores in the moraines of Explorers Cove, in which case the coastline of McMurdo Sound is more extensively ice-cored than previously known.

Seasonal fluctuation in food sources of herbivorous gastropods in a subtropical seagrass bed estimated by stable isotope analysis

2018 ◽  
Vol 99 (5) ◽  
pp. 1119-1125
Author(s):  
Kenta Nakamoto ◽  
Jun Hayakawa ◽  
Tomohiko Kawamura ◽  
Naoya Ohtsuchi ◽  
Hideaki Yamada ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Seasonal Change ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Seasonal Fluctuation ◽  
Food Sources ◽  
Seagrass Bed ◽  
Gastropod Species ◽  
Total Contribution ◽  
Herbivorous Gastropods

AbstractVarious herbivorous invertebrates in seagrass beds are considered to be generalists in food use and their diets may temporally fluctuate according to the availability of food sources. We assessed whether food sources of herbivorous gastropods vary in a subtropical seagrass bed in Nagura Bay, Ishigaki Island, where coexisting seaweeds grow densely in spring but minimally in summer. Abundant gastropods and their possible food sources were collected in spring and summer of 2013 and 2015, and their stable carbon and nitrogen isotope ratios were measured. Between the two seasons, each possible food source had similar isotopic values, but all the herbivorous gastropod species in summer were more enriched in 13C than the gastropod samples in spring. The mixing models in SIAR (Stable Isotope Analysis in R) showed that the total contribution rates of seaweeds, i.e. rhodophytes, phaeophytes and chlorophytes, for all herbivorous gastropod species decreased from spring to summer; in contrast, the contribution rate of seagrasses increased. Linear Mixed Models showed that the seasonal variation in δ13C of the herbivorous gastropods was larger than that of the possible food sources, adding further evidence to the seasonal change in food sources of the herbivorous gastropods. This seasonal change in food use appears to correspond to the change in seaweed biomass, suggesting that herbivorous gastropods flexibly change their diets depending on food availability.

Gut content and stable isotope analysis of tadpoles in floodplain wetlands

2018 ◽  
Vol 66 (4) ◽  
pp. 261 ◽  
Author(s):  
J. F. Ocock ◽  
K. J. Brandis ◽  
B. J. Wolfenden ◽  
K. M. Jenkins ◽  
S. Wassens
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Management Strategies ◽  
Isotope Analysis ◽  
Food Sources ◽  
Gut Contents ◽  
Floodplain Wetlands ◽  
Gut Content ◽  
Larval Amphibians ◽  
Aquatic Food

Larval amphibians (tadpoles) are an important link in aquatic food webs, as they can be highly abundant consumers and prey for a wide variety of predators. Most tadpoles are considered omnivores, predominately grazing on algae, detritus and macrophytes, though recent work has identified greater plasticity and breadth in diet than previously considered. We used gut content and stable isotope analysis (SIA) in a baseline study to determine the important dietary items (ingested material) and food sources (assimilated material) for tadpoles of two abundant generalist frog species in regulated floodplain wetlands of the Murrumbidgee River, south-east Australia. We identified a wide variety of dietary items in the gut contents, including whole microcrustaceans, filamentous algae and macrophytes. The composition of several ingested food items was correlated with their availability in each wetland. However, SIA identified biofilm as the food source most consistently assimilated across several wetlands, though microcrustaceans and algae contributed when abundant. Biofilm is likely the most important basal food item for tadpoles in floodplain wetlands because it is ubiquitous and has a high nutritional quality. Identifying important food sources is a crucial step towards developing management strategies for promoting tadpole recruitment in regulated wetlands.

Stable isotope analysis of macroinvertebrates and their food sources in a glacier stream

2001 ◽  
Vol 46 (7) ◽  
pp. 871-882 ◽  
Author(s):  
Rainer Zah ◽  
Peter Burgherr ◽  
Stefano M. Bernasconi ◽  
Urs Uehlinger
Keyword(s):  
Stable Isotope ◽  
Stable Isotope Analysis ◽  
Isotope Analysis ◽  
Food Sources
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