Evidence map›Paper›PMID 26870668›Full record

ArticleMethodsX2016

Analysis of hair cortisol levels in captive chimpanzees: Effect of various methods on cortisol stability and variability.

Yumi Yamanashi, Migaku Teramoto, Naruki Morimura, Satoshi Hirata, Juri Suzuki, Misato Hayashi, Kodzue Kinoshita, Miho Murayama, Gen'ichi Idani

Open access · goldAbstract read
In one paragraph

Article in MethodsX, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.0field-weighted citation impact, top 16% of its field
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

24 citing papers in PubMed, 47 citations in OpenAlex.

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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

9 authors at 2 institutions in 1 country.

Yumi YamanashiWildlife Research Center, Kyoto University, Japan.
Migaku TeramotoWildlife Research Center, Kyoto University, Japan.
Naruki MorimuraWildlife Research Center, Kyoto University, Japan.
Satoshi HirataWildlife Research Center, Kyoto University, Japan.
Juri SuzukiPrimate Research Institute, Kyoto University, Japan.
Misato HayashiPrimate Research Institute, Kyoto University, Japan.
Kodzue KinoshitaPrimate Research Institute, Kyoto University, Japan.
Miho MurayamaWildlife Research Center, Kyoto University, Japan; National Institute for Environmental Studies, Japan.
Gen'ichi IdaniWildlife Research Center, Kyoto University, Japan.
Kyoto University · JPJapan Wildlife Research Center · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hair cortisol has been reported to be a useful measure of long-term hypothalamic-pituitary-adrenal (HPA) axis activation in several species. It serves as a practical tool for long-term stress assessment, but it is important to understand the methodological factors that can affects hair cortisol assays to avoid methodological artifacts. To that end, we tested several procedures for measuring cortisol levels in hair collected from captive chimpanzees. The results showed that reproducibility was high, and we found no differences in cortisol levels among the various storage, drying, and sampling methods. However, the fineness of homogenized hair, sample weight, and extraction time affected absolute hair cortisol concentration. Although hair cortisol levels were stable over time, factors that may influence measurement results should be kept constant throughout a study.•We modified and validated a methodology involving enzyme immunoassays to reliably measure the hair cortisol levels of captive chimpanzees.•The results revealed that the fineness of homogenized hair, sample weight, and extraction time caused variations in absolute hair cortisol concentrations in chimpanzees. In contrast, storage, drying, and sampling from similar body parts did not affect the results.

Indexed as

Animal welfareChimpanzeeHair cortisolLong-term stressPractical methodology

Identifiers

PMID26870668
PMCPMC4739149
OpenAlexW2279259723

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.