Evidence map›Paper›PMID 32788996›Full record

ArticleEcology and evolution2020

The conservation status and population decline of the African penguin deconstructed in space and time.

Richard B Sherley, Robert J M Crawford, Andrew D de Blocq, Bruce M Dyer, Deon Geldenhuys, Christina Hagen, Jessica Kemper, Azwianewi B Makhado, Lorien Pichegru, Desmond Tom and 4 more

Abstract read
In one paragraph

Article in Ecology and evolution, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing 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

10 citing papers in PubMed.

  1. Insights from three decades of IUCN Red List assessments catalyzing shark, ray, and chimaera conservation.Conservation biology : the journal of the Society for Conservation Biology · 2026
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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

14 authors.

Richard B SherleyCentre for Ecology and Conservation College of Life and Environmental Sciences University of Exeter Penryn UK.ORCID https://orcid.org/0000-0001-7367-9315
Robert J M CrawfordDepartment of Environment, Forestry and Fisheries (DEFF) Cape Town South Africa.
Andrew D de BlocqSeabird Conservation Programme BirdLife South Africa Cape Town South Africa.
Bruce M DyerDepartment of Environment, Forestry and Fisheries (DEFF) Cape Town South Africa.
Deon GeldenhuysCapeNature PGWC Shared Services Centre Bridgetown South Africa.
Christina HagenSeabird Conservation Programme BirdLife South Africa Cape Town South Africa.
Jessica KemperAfrican Penguin Conservation Project Lüderitz Namibia.
Azwianewi B MakhadoFitzPatrick Institute of African Ornithology DST-NRF Centre of Excellence University of Cape Town Cape Town South Africa.
Lorien PichegruDST/NRF Centre of Excellence at the FitzPatrick Institute of African Ornithology Institute for Coastal and Marine Research and Department of Zoology Nelson Mandela University Port Elizabeth South Africa.
Desmond TomMinistry of Fisheries and Marine Resources Lüderitz Namibia.
Leshia UpfoldDepartment of Environment, Forestry and Fisheries (DEFF) Cape Town South Africa.
Johan VisagieCapeNature PGWC Shared Services Centre Bridgetown South Africa.
Lauren J WallerSouthern African Foundation for the Conservation of Coastal Birds (SANCCOB) Cape Town South Africa.
Henning WinkerJoint Research Centre of the European Commission Ispra Italy.ORCID https://orcid.org/0000-0003-4774-4499

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Understanding changes in abundance is crucial for conservation, but population growth rates often vary over space and time. We use 40 years of count data (1979-2019) and Bayesian state-space models to assess the African penguin

Indexed as

Bayesian state‐space modelBenguela ecosystemextinction riskIUCN Red List assessmentpopulation dynamicsseabird conservation

Identifiers

PMID32788996
PMCPMC7417240

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

None linked

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.