Evidence map›Paper›PMID 31659039›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2019

Inexperienced preys know when to flee or to freeze in front of a threat.

Marie Hébert, Elisabetta Versace, Giorgio Vallortigara

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
–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

19 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  18. Inexperienced preys know when to flee or to freeze in front of a threat.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  19. Torpor use in response to predation risk in a small, free-living bird.Behavioral ecology : official journal of the International Society for Behavioral Ecology
    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.

Marie HébertCenter for Mind/Brain Sciences, University of Trento, 38068 Rovereto, Italy; marie.hebert@unitn.it e.versace@qmul.ac.uk giorgio.vallortigara@unitn.it.
Elisabetta VersaceCenter for Mind/Brain Sciences, University of Trento, 38068 Rovereto, Italy; marie.hebert@unitn.it e.versace@qmul.ac.uk giorgio.vallortigara@unitn.it.
Giorgio VallortigaraCenter for Mind/Brain Sciences, University of Trento, 38068 Rovereto, Italy; marie.hebert@unitn.it e.versace@qmul.ac.uk giorgio.vallortigara@unitn.it.ORCID 0000-0001-8192-9062

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Using appropriate antipredatory responses is crucial for survival. While slowing down reduces the chances of being detected from distant predators, fleeing away is advantageous in front of an approaching predator. Whether appropriate responses depend on experience with moving objects is still an open question. To clarify whether adopting appropriate fleeing or freezing responses requires previous experience, we investigated responses of chicks naive to movement. When exposed to the moving cues mimicking an approaching predator (a rapidly expanding, looming stimulus), chicks displayed a fast escape response. In contrast, when presented with a distal threat (a small stimulus sweeping overhead) they decreased their speed, a maneuver useful to avoid detection. The fast expansion of the stimulus toward the subject, rather than its size per se or change in luminance, triggered the escape response. These results show that young animals, in the absence of previous experience, can use motion cues to select the appropriate responses to different threats. The adaptive needs of young preys are thus matched by spontaneous defensive mechanisms that do not require learning.

Indexed as

Escape ReactionAnimalsBehavior, AnimalChickensLearningVision, Ocularantipredatory behaviorsdefense strategiesmotion cuesnaive animalsthreat detection

Identifiers

PMID31659039
PMCPMC6859328

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.