Evidence map›Paper›PMID 27761321›Full record

ArticlePeerJ2016

Positive effect of dietary lutein and cholesterol on the undirected song activity of an opportunistic breeder.

Stefania Casagrande, Rianne Pinxten, Erika Zaid, Marcel Eens

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in PeerJ, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact, top 94% 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

1 citing paper in PubMed, 2 citations in OpenAlex.

  1. 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

4 authors at 3 institutions in 3 countries.

Stefania CasagrandeEvolutionary Physiology Group, Max Planck Institute for Ornithology, Seewiesen, Germany; Department of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Antwerp, Belgium.
Rianne PinxtenDepartment of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Antwerp, Belgium; Faculty of Social Sciences, Antwerp School of Education, University of Antwerp, Antwerp, Belgium.
Erika ZaidDepartment of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp, Antwerp, Belgium; Department of Zoology, School of Life Sciences, La Trobe University, Melbourne, Victoria, Australia.
Marcel EensDepartment of Biology, Behavioural Ecology and Ecophysiology Group, University of Antwerp , Antwerp , Belgium.
University of Antwerp · BELa Trobe University · AUMax Planck Institute for Ornithology · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Song is a sexually selected trait that is thought to be an honest signal of the health condition of an individual in many bird species. For species that breed opportunistically, the quantity of food may be a determinant of singing activity. However, it is not yet known whether the quality of food plays an important role in this respect. The aim of the present study was to experimentally investigate the role of two calorie-free nutrients (lutein and cholesterol) in determining the expression of a sexually selected behavior (song rate) and other behaviors (locomotor activity, self-maintenance activity, eating and resting) in male zebra finches (

Indexed as

BirdsongCarotenoidFood qualityPhotoperiodTestosteroneUndirected song

Identifiers

PMID27761321
PMCPMC5068346
OpenAlexW2514173940

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.