Evidence map›Paper›PMID 31477846›Full record

ArticleNature ecology & evolution2019

Differential fitness effects of moonlight on plumage colour morphs in barn owls.

Luis M San-Jose, Robin Séchaud, Kim Schalcher, Clarisse Judes, Anastasia Questiaux, Aymeric Oliveira-Xavier, Charlène Gémard, Bettina Almasi, Paul Béziers, Almut Kelber and 2 more

Abstract read
In one paragraph

Article in Nature ecology & evolution, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

21 citing papers in PubMed.

  1. Article
  2. Article
  3. Nocturnal camouflage through background matching against moonlight.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  16. Article
  17. Article
  18. New genome assembly of the barn owl (Ecology and evolution · 2020
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  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors.

Luis M San-JoseDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland. luismsanjose@gmail.com.ORCID http://orcid.org/0000-0003-1351-4679
Robin SéchaudDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Kim SchalcherDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Clarisse JudesDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Anastasia QuestiauxDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Aymeric Oliveira-XavierDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Charlène GémardDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Bettina AlmasiSwiss Ornithological Institute, Sempach, Switzerland.
Paul BéziersDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland.
Almut KelberLund Vision Group, Department of Biology, Lund University, Lund, Sweden.ORCID http://orcid.org/0000-0003-3937-2808
Arjun AmarFitzPatrick Institute of African Ornithology, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch, South Africa.ORCID http://orcid.org/0000-0002-7405-1180
Alexandre RoulinDepartment of Ecology and Evolution, University of Lausanne, Biophore Building, Lausanne, Switzerland. alexandre.roulin@unil.ch.ORCID http://orcid.org/0000-0003-1940-6927

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (Swiss National Science Foundation) FNS31003A_173178Swiss National Science Foundation 173178
6 · The paper itself

Abstract

The Moon cycle exposes nocturnal life to variation in environmental light. However, whether moonlight shapes the fitness of nocturnal species with distinct colour variants remains unknown. Combining data from long-term monitoring, high-resolution global positioning system tracking and experiments using prey, we show that barn owls (Tyto alba) with distinct plumage colourations are differently affected by moonlight. The reddest owls are less successful at hunting and providing food to their offspring during moonlit nights, which associates with lower body mass and lower survival of the youngest nestlings and with female mates starting to lay eggs at low moonlight levels. Although moonlight should make white owls more conspicuous to prey, it either positively affects or does not affect the hunting and fitness of the whitest owls. We experimentally show that, under full-moon conditions, white plumage triggers longer freezing times in prey, which should facilitate prey catchability. We propose that the barn owl's white plumage, a rare trait among nocturnal predators, exploits the known aversion of rodents to bright light, explaining why, counterintuitively, moonlight has a lesser impact on the whitest owls. Our study provides evidence for the long-suspected influence of the Moon on the evolution of colouration in nocturnal species, highlighting the importance of colour in nocturnal ecosystems.

Indexed as

StrigiformesAnimalsColorEcosystemFemalePhenotype

Identifiers

PMID31477846
PMCPMC6728161

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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.