Evidence map›Paper›PMID 26499450›Full record

ArticleScientific reports2015

Use of ordinal information by fish.

Maria Elena Miletto Petrazzini, Tyrone Lucon-Xiccato, Christian Agrillo, Angelo Bisazza

Abstract read
In one paragraph

Article in Scientific reports, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Initial organization and progressive expansion of the math-responsive brain network during the first school years.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  2. Neural Tuning for Ordinal Processing: Convergent Patterns in Human Brains and Artificial Networks.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2026
    Article
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  10. Numerical ordinality in a wild nectarivore.Proceedings. Biological sciences · 2020
    Article
  11. Searching for the CriticalFrontiers in psychology · 2020
    Review
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  16. Understanding the origin of number sense: a review of fish studies.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2017
    Review
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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

4 authors.

Maria Elena Miletto PetrazziniDipartimento di Psicologia Generale, Università di Padova, Italy.
Tyrone Lucon-XiccatoDipartimento di Psicologia Generale, Università di Padova, Italy.
Christian AgrilloDipartimento di Psicologia Generale, Università di Padova, Italy.
Angelo BisazzaDipartimento di Psicologia Generale, Università di Padova, Italy.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mammals and birds can process ordinal numerical information which can be used, for instance, for recognising an object on the basis of its position in a sequence of similar objects. Recent studies have shown that teleost fish possess numerical abilities comparable to those of other vertebrates, but it is unknown if they can also learn ordinal numerical relations. Guppies (Poecilia reticulata) learned to recognise the 3(rd) feeder in a row of 8 identical ones even when inter-feeder distance and feeder positions were varied among trials to prevent the use of any spatial information. To assess whether guppies spontaneously use ordinal or spatial information when both are simultaneously available, fish were then trained with constant feeder positions and inter-feeder distance. In probe trials where these two sources of information were contrasted, the subjects selected the correct ordinal position significantly more often than the original spatial position, indicating that the former was preferentially encoded during training. Finally, a comparison between subjects trained on the 3(rd) and the 5(th) position revealed that guppies can also learn the latter discrimination, but the larger error rate observed in this case suggests that 5 is close to the upper limit of discrimination in guppies.

Indexed as

AnimalsFeeding BehaviorFishes

Identifiers

PMID26499450
PMCPMC4620454

What OpenQuestion holds

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Registered trials

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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.