ArticlePloS one2011
Integrating stomach content and stable isotope analyses to quantify the diets of pygoscelid penguins.
Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.
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Who cites it
29 citing papers in PubMed.
- Spatial Segregation and Trophic Niche Divergence in Two Disjunct Populations of Wedge-Tailed ShearwaterEcology and evolution · 2026Article
- Advancing Seabird Diet Studies Through Buccal Swabbing for DNA Metabarcoding.Ecology and evolution · 2025Article
- Interactions between contaminants and the trophic ecology of two seabirds in a coastal lagoon of the Gulf of California.Ecotoxicology (London, England) · 2025Article
- Identifying prey capture events of a free-ranging marine predator using bio-logger data and deep learning.Royal Society open science · 2024Article
- Microplastics in gastrointestinal tracts of gentoo penguin (Pygoscelis papua) chicks on King George Island, Antarctica.Scientific reports · 2023Article
- Quantifying Antarctic krill connectivity across the West Antarctic Peninsula and its role in large-scale Pygoscelis penguin population dynamics.Scientific reports · 2023Article
- Article
- Changes in the feeding ecology of an opportunistic predator inhabiting urban environments in response to COVID-19 lockdown.Royal Society open science · 2023Article
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- How animals distribute themselves in space: energy landscapes of Antarctic avian predators.Movement ecology · 2021Article
- Seasonal patterns in stable isotope and fatty acid profiles of southern stingrays (Hypanus americana) at Stingray City Sandbar, Grand Cayman.Scientific reports · 2020Article
- Leopard seal diets in a rapidly warming polar region vary by year, season, sex, and body size.BMC ecology · 2020Article
- Predation on endangered species by human-subsidized domestic cats on Tokunoshima Island.Scientific reports · 2019Article
- Dietary divergence is associated with increased intra-specific competition in a marine predator.Scientific reports · 2018Article
- Temporal variation in trophic relationships among three congeneric penguin species breeding in sympatry.Ecology and evolution · 2018Article
- Article
- Evaluating the use of stable isotope analysis to infer the feeding ecology of a growing US gray seal (Halichoerus grypus) population.PloS one · 2018Article
- Assessing the applicability of stable isotope analysis to determine the contribution of landfills to vultures' diet.PloS one · 2018Article
- Foraging connections: Patterns of prey use linked to invasive predator diel movement.PloS one · 2018Article
- Article
Corrections and comments
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Authors and funding
6 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Stomach content analysis (SCA) and more recently stable isotope analysis (SIA) integrated with isotopic mixing models have become common methods for dietary studies and provide insight into the foraging ecology of seabirds. However, both methods have drawbacks and biases that may result in difficulties in quantifying inter-annual and species-specific differences in diets. We used these two methods to simultaneously quantify the chick-rearing diet of Chinstrap (Pygoscelis antarctica) and Gentoo (P. papua) penguins and highlight methods of integrating SCA data to increase accuracy of diet composition estimates using SIA. SCA biomass estimates were highly variable and underestimated the importance of soft-bodied prey such as fish. Two-source, isotopic mixing model predictions were less variable and identified inter-annual and species-specific differences in the relative amounts of fish and krill in penguin diets not readily apparent using SCA. In contrast, multi-source isotopic mixing models had difficulty estimating the dietary contribution of fish species occupying similar trophic levels without refinement using SCA-derived otolith data. Overall, our ability to track inter-annual and species-specific differences in penguin diets using SIA was enhanced by integrating SCA data to isotopic mixing modes in three ways: 1) selecting appropriate prey sources, 2) weighting combinations of isotopically similar prey in two-source mixing models and 3) refining predicted contributions of isotopically similar prey in multi-source models.
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