Evidence map›Paper›PMID 30787406›Full record

ArticleScientific reports2019

Effects of commercial hatchery processing on short- and long-term stress responses in laying hens.

Louise Hedlund, Rosemary Whittle, Per Jensen

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed
8.0field-weighted citation impact, top 2% 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

39 citing papers in PubMed, 82 citations in OpenAlex.

  1. Article
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  8. Welfare assessment of turkeys (EFSA journal. European Food Safety Authority · 2026
    Article
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  11. Review
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  17. Welfare of broilers on farm.EFSA journal. European Food Safety Authority · 2023
    Article
  18. Article
  19. Article
  20. Article
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

3 authors at 1 institution in 1 country.

Louise HedlundIFM Biology, AVIAN Behavioural Physiology and Genomics Group, Linköping University, 58183, Linköping, Sweden.
Rosemary WhittleIFM Biology, AVIAN Behavioural Physiology and Genomics Group, Linköping University, 58183, Linköping, Sweden.
Per JensenIFM Biology, AVIAN Behavioural Physiology and Genomics Group, Linköping University, 58183, Linköping, Sweden. perje@ifm.liu.se.
Linköping University · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In commercial egg production, chicks are exposed to a potentially stressful procedure during their first day of life. Here, we investigated how this procedure affects the chickens in a short- as well as long-term perspective by conducting two behaviour tests and measuring corticosterone (CORT) and sex hormone levels at different time points. These results were compared with a group of control chickens from the same hatchery and incubator that did not go through the commercial hatchery routine. Chickens were continuously weighed, egg production data was collected and feather scoring was performed. We found that chicks have a significant increase in CORT during the hatchery process, which implies they are exposed to stress. During first weeks of life, these chicks were more fearful, had a higher CORT reactivity during restraint and weighed more than control chicks. Later in life, hatchery treated chickens had more feather damages and injuries on combs and wattles, a faster onset of egg laying and higher levels of estradiol. We conclude that processing at the commercial hatchery was a stressful event with short- and long-term effects on behaviour and stress reactivity, and potentially also positive effects on production. The results are relevant for a large number of individuals, since the chicken is by far the globally most common farm animal.

Indexed as

Animal HusbandryAnimalsBehavior, AnimalChickensCorticosteroneFearFeathersFemaleOvipositionPoultryRestraint, PhysicalStress, PhysiologicalCorticosterone

Identifiers

PMID30787406
PMCPMC6382823
OpenAlexW2922776503

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.