Evidence map›Paper›PMID 30900534›Full record

ArticleProceedings. Biological sciences2019

Long-term trends in wild-capture and population dynamics point to an uncertain future for captive elephants.

John Jackson, Dylan Z Childs, Khyne U Mar, Win Htut, Virpi Lummaa

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing 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

18 citing papers in PubMed.

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  9. Review
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  12. Milk Composition of Asian Elephants (Animals : an open access journal from MDPI · 2020
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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

5 authors.

John Jackson1 Department of Animal and Plant Sciences, University of Sheffield , Sheffield S10 2TN , UK.
Dylan Z Childs1 Department of Animal and Plant Sciences, University of Sheffield , Sheffield S10 2TN , UK.
Khyne U Mar2 Department of Biology, University of Turku , 20500 Turku , Finland.
Win Htut3 Myanma Timber Enterprise, Ministry of Natural Resources and Environment Conservation, Gyogone Forest Compound , Bayint Naung Road, Insein Township, Yangon , Myanmar.
Virpi Lummaa2 Department of Biology, University of Turku , 20500 Turku , Finland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Maintaining sustainable populations in captivity without supplementation through wild-capture is a major challenge in conservation that zoos and aquaria are working towards. However, the capture of wild animals continues for many purposes where conservation is not the primary focus. Wild-capture hinders long-term conservation goals by reducing remaining wild populations, but the direct and long-term indirect consequences of wild-capture for captive population viability are rarely addressed using longitudinal data. We explored the implications of changes in wild-capture on population dynamics in captivity over 54 years using a multi-generational studbook of working Asian elephants ( Elephas maximus) from Myanmar, the largest remaining captive elephant population. Here we show that population growth and birth rates declined between 1960 and 2014 with declines in wild-capture. Importantly, wild-caught females had reduced birth rates and a higher mortality risk. However, despite the disadvantages of wild-capture, the population may not be sustainable without it, with immediate declines owing to an unstable age-structure that may last for 50 years. Our results highlight the need to assess the long-term demographic consequences of wild-capture to ensure the sustainability of captive and wild populations as species are increasingly managed and conserved in altered or novel environments.

Indexed as

AnimalsAnimals, ZooConservation of Natural ResourcesElephantsFemaleMyanmarPopulation Dynamicsdemographyex situ conservationindividual-based modellife historypopulation viability

Identifiers

PMID30900534
PMCPMC6452069

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.