Amphibian Intestine Allometry.

M J Duque-Correa, C Meloro, S Keller, P Cigler, I Wethli, J Niehaus, M Przybyło, M Clauss

Abstract read

In one paragraph

Article in Journal of morphology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it

0cells of the map it votes in

0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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

8 authors.

M J Duque-CorreaClinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0001-8431-2228

C MeloroResearch Center in Evolutionary Anthropology and Palaeoecology, School of Biological and Environmental Sciences, Liverpool John Moores University, Liverpool, UK.ORCID https://orcid.org/0000-0003-0175-1706

S KellerInstitute for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.ORCID https://orcid.org/0000-0002-9653-516X

P CiglerInstitute for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.ORCID https://orcid.org/0000-0003-1726-9228

I WethliInstitute for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.ORCID https://orcid.org/0009-0001-6729-8222

J NiehausInstitute for Fish and Wildlife Health, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.ORCID https://orcid.org/0009-0003-4312-9680

M PrzybyłoDepartment of Animal Nutrition and Fisheries, University of Agriculture in Krakow, Krakow, Poland.ORCID https://orcid.org/0000-0001-5024-8600

M ClaussClinic for Zoo Animals, Exotic Pets and Wildlife, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.ORCID https://orcid.org/0000-0003-3841-6207

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung CRSII5_189970/1

6 · The paper itself

Abstract

Across four large vertebrate groups-fish, reptiles, birds and mammals- intestine length has been shown to scale hyper-allometrically with body mass (BM), at an exponent higher than the geometric (isometric) expectation, 0.33. So far, amphibians have not been investigated in this respect. Combining original data from dissections and literature data, we evaluated the scaling of total intestine length with BM in the adult stages of 38 amphibian species (37 of which anurans). The BM range of investigated taxa was 2.2 to 113.5 g. When accounting for phylogeny, intestine length scaled with BM at an exponent with a 95% confidence interval of 0.39 to 0.53, corroborating the hyper-allometric scaling observed in other vertebrates. The hypothetical explanation is that larger animals, while requiring a proportionate intestinal absorptive surface to meet their metabolic demands, need to maintain short diffusion distances between the sites of digestive enzyme secretion/nutrient absorption and the digesta. This mechanism should result in hypo-allometric scaling of intestine diameter, with the hyper-allometric scaling of intestinal length ensuring the overall constancy of functional organ surface.

Indexed as

AmphibiansIntestinesAnimalsPhylogenyanatomydigestionscaling

Identifiers

PMID42152794

DOI10.1002/jmor.70130

PMCPMC13184666

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LicenceCC BY

Read underepoch 390

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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.