Evidence map›Paper›PMID 33173126›Full record

ArticleScientific reports2020

A global population assessment of the Chinstrap penguin (Pygoscelis antarctica).

Noah Strycker, Michael Wethington, Alex Borowicz, Steve Forrest, Chandi Witharana, Tom Hart, Heather J Lynch

Abstract read
In one paragraph

Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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.

2 · The registry

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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Noah StryckerSchool of Marine and Atmospheric Sciences, Stony Brook University, 145 Endeavour Hall, Stony Brook, NY, 11794, USA. noah.strycker@gmail.com.
Michael WethingtonDepartment of Ecology and Evolution, Stony Brook University, Stony Brook, NY, USA.
Alex BorowiczDepartment of Ecology and Evolution, Stony Brook University, Stony Brook, NY, USA.
Steve ForrestDepartment of Ecology and Evolution, Stony Brook University, Stony Brook, NY, USA.
Chandi WitharanaDepartment of Natural Resources and the Environment, University of Connecticut, Storrs, CT, USA.
Tom HartDepartment of Zoology, University of Oxford, Oxford, UK.
Heather J LynchDepartment of Ecology and Evolution, Stony Brook University, Stony Brook, NY, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Using satellite imagery, drone imagery, and ground counts, we have assembled the first comprehensive global population assessment of Chinstrap penguins (Pygoscelis antarctica) at 3.42 (95th-percentile CI: [2.98, 4.00]) million breeding pairs across 375 extant colonies. Twenty-three previously known Chinstrap penguin colonies are found to be absent or extirpated. We identify five new colonies, and 21 additional colonies previously unreported and likely missed by previous surveys. Limited or imprecise historical data prohibit our assessment of population change at 35% of all Chinstrap penguin colonies. Of colonies for which a comparison can be made to historical counts in the 1980s, 45% have probably or certainly declined and 18% have probably or certainly increased. Several large colonies in the South Sandwich Islands, where conditions apparently remain favorable for Chinstrap penguins, cannot be assessed against a historical benchmark. Our population assessment provides a detailed baseline for quantifying future changes in Chinstrap penguin abundance, sheds new light on the environmental drivers of Chinstrap penguin population dynamics in Antarctica, and contributes to ongoing monitoring and conservation efforts at a time of climate change and concerns over declining krill abundance in the Southern Ocean.

Indexed as

Animal DistributionAnimalsAntarctic RegionsClimate ChangeConservation of Natural ResourcesEuphausiaceaFeeding BehaviorGeographyIslandsPopulation DensityPopulation DynamicsSatellite ImagerySeasonsSpheniscidae

Identifiers

PMID33173126
PMCPMC7655846

What OpenQuestion holds

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Registered trials

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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.