ArticleScience advances2021
Insights from the first global population estimate of Weddell seals in Antarctica.
Article in Science advances, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
13 citing papers in PubMed.
- Field immobilisation of adult Weddell seals using intramuscular butorphanol and midazolam.The Veterinary record · 2026Article
- A 26-Year Record of Seasonality and Interannual Variability in Marine Mammal Sightings From Northern Marguerite Bay, Antarctica.Ecology and evolution · 2026Article
- Article
- The Biodiversity of Peter I Island-The Most Remote Island in the World.Ecology and evolution · 2025Article
- AI-based satellite survey offers independent assessment of migratory wildebeest numbers in the Serengeti.PNAS nexus · 2025Article
- Advances in remote sensing of emperor penguins: first multi-year time series documenting trends in the global population.Proceedings. Biological sciences · 2024Article
- Article
- Where to live? Landfast sea ice shapes emperor penguin habitat around Antarctica.Science advances · 2023Article
- Deep learning enables satellite-based monitoring of large populations of terrestrial mammals across heterogeneous landscape.Nature communications · 2023Article
- Genetic diversity and demographic history of the leopard seal: A Southern Ocean top predator.PloS one · 2023Article
- Seasonal habitat preference and foraging behaviour of post-moult Weddell seals in the western Ross Sea.Royal Society open science · 2023Article
- Review
- Circoviruses and cycloviruses identified in Weddell seal fecal samples from McMurdo Sound, Antarctica.Infection, genetics and evolution : journal of molecular epidemiology and evolutionary genetics in infectious diseases · 2021Article
Corrections and comments
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Authors and funding
11 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The Weddell seal is one of the best-studied marine mammals in the world, owing to a multidecadal demographic effort in the southernmost part of its range. Despite their occurrence around the Antarctic coastline, we know little about larger scale patterns in distribution, population size, or structure. We combined high-resolution satellite imagery from 2011, crowd-sourcing, and habitat modeling to report the first global population estimate for the species and environmental factors that influence its distribution. We estimated ~202,000 (95% confidence interval: 85,345 to 523,140) sub-adult and adult female seals, with proximate ocean depth and fast-ice variables as factors explaining spatial prevalence. Distances to penguin colonies were associated with seal presence, but only emperor penguin population size had a strong negative relationship. The small, estimated population size relative to previous estimates and the seals’ nexus with trophic competitors indicates that a community ecology approach is required in efforts to monitor the Southern Ocean ecosystem.
Identifiers
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.