Size does matter: crocodile mothers react more to the voice of smaller offspring
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Parental care is widespread in Archosaurs (birds, crocodilians, dinosaurs and pterosaurs) and this group provides a useful model for the evolution of parent-offspring interactions. While offspring signalling has been well-studied in birds, the modulation of parental care in crocodilians remains an open question. Here we show that acoustic communication has a key role in the dynamics of crocodilian’ mother-offspring relationships. We found embedded information about the emitter’s size in juvenile calls of several species and experimentally demonstrated that Nile crocodile mothers breeding in the wild are less receptive to the calls of larger juveniles. Using synthetized sounds, we further showed that female’ reaction depends on call pitch, an important cue bearing size information. Changes in acoustic interactions may thus go with the break of maternal care as well as dispersal of juvenile crocodilians. This process could have characterized other archosaurs displaying rapid early growth such as dinosaurs and pterosaurs.
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Nile crocodile mothers respond more strongly to the vocalisations of smaller offspring.
“For example, Nile crocodile mothers have been shown to respond more strongly to the vocalisations of smaller offspring (Chabert et al. 2015).”
From Roars, Rumbles, and Resonance: A Systematic Review and Meta‐Analysis of Crocodylian Acoustic Signals (2026) · cites this paper as Chabert et al. 2015
The spectral centroid is an important predictor of individuality in the American alligator bellow, and size in the contact call of juveniles from various species.
“The spectral centroid is an important predictor of individuality in the American alligator bellow (Jensen et al. 2024), and size in the contact call of juveniles from various species (Chabert et al. 2015).”
From Roars, Rumbles, and Resonance: A Systematic Review and Meta‐Analysis of Crocodylian Acoustic Signals (2026) · cites this paper as Chabert et al. 2015
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- Authors
- Chabert, T., Colin, A., Aubin, T., Shacks, V., Bourquin, S. L., Elsey, R. M., Acosta, J. G., & Mathevon, N.
- Affiliations
- Université Paris-Sud (FR)
- Louisiana Department of Wildlife and Fisheries (US)
- Corresponding author
- Mathevon, N.
- Venue
- Scientific Reports
- Published
- 2015-10-23
- Volume
- 5
- Issue
- 1
- Pages
- 15547-15547
- ISSN
- 2045-2322 (ISSN-L)
- PMC
- PMC4616036
- OpenAlex
- W2412028936
- Cited by
- 60
- References
- 59
- Citations by year
- 2026: 3 · 2025: 7 · 2024: 3 · 2023: 5 · 2022: 7 · 2021: 2 · 2020: 22 · 2019: 5 · 2018: 4 · 2017: 1 · 2016: 1
- FWCI
- 1.74
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Scientific Reports (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- CUNY Academic Works (City University of New York) (submittedVersion)
- HAL (submittedVersion, cc-by)
- Greater South Information System
- Funders
- National Geographic Society
- Centre National de la Recherche Scientifique
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Developmental Biology › Animal Vocal Communication and Behavior
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
- Physical Sciences › Environmental Science › Ecology › Marine animal studies overview
- Keywords
- crocodilians, Nile crocodile, parental care, mother-offspring interactions, acoustic communication, maternal responsiveness, natal dispersal, archosaurs, evolution of parental care
- MeSH terms
- Alligators and Crocodiles, Animals, Female, Body Size
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
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