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August 15, 2025Scientific ReportsOpen Access

Phenotypic variation in otolith shape of American shad across eastern North American rivers

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Authors

JVJoana VasconcelosUniversidad de Las Palmas de Gran CanariaKLKarin E. LimburgState University of New YorkJOJosé Luis Oterro-Ferrer

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Implication

Analysis reveals distinct otolith morphologies and strong population structure in American shad, suggesting environmental influence.

Key Points

  • Significant otolith shape variation was found in American shad populations, indicating potential environmental adaptation.
  • Principal Component Analysis identified key differences in otolith features like the rostrum and posterior region among populations.
  • Wavelet transform techniques revealed two primary otolith morphologies that were geographically structured along a latitudinal gradient.
  • These findings highlight how local environmental conditions may influence otolith morphology, aiding in understanding population structure.

Cite This Study

Vasconcelos et al. (2025) studied this question.

synapsesocial.com/papers/68a3654c0a429f797332af7dhttps://doi.org/10.1038/s41598-025-14742-1
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