Publikation:

Repeated Divergence in Opsin Genes Expression Mirrors Photic Habitat Changes in Rapidly Evolving Crater Lake Cichlid Fishes

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2024

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European Union (EU): 293700
Deutsche Forschungsgemeinschaft (DFG): TO 914/3-1

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Comparative genomics of parallel in repeated adaptive radiations (GenAdap)
Open Access-Veröffentlichung
Open Access Green
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Gesperrt bis

31. Mai 2025

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The American Naturalist. University of Chicago Press. 2024, 203(5), S. 604-617. ISSN 0003-0147. eISSN 1537-5323. Verfügbar unter: doi: 10.1086/729420

Zusammenfassung

Selection pressures differ along environmental gradients and traits tightly linked to fitness (e.g., the visual system) are expected to track such variation. Along gradients, adaptation to local conditions might be due to heritable and non-heritable, environmentally induced variation. Disentangling these sources of phenotypic variation requires studying closely related populations in nature and the laboratory. The Nicaraguan lakes represent an environmental gradient in photic conditions from clear crater lakes to very turbid great lakes. From two old, turbid great lakes, Midas cichlid fish (Amphilophus cf. citrinellus) independently colonized seven isolated crater lakes of varying light conditions, resulting in a small adaptive radiation. We estimated visual sensitivities variation along this photic gradient by measuring cone opsin gene expression among lake populations. Visual sensitivities observed in all seven derived crater lake populations shifted predictably in direction and magnitude, repeatedly mirroring changes in photic conditions. Comparing wild-caught and laboratory-reared fish revealed that 48% of this phenotypic variation is genetically determined and evolved rapidly. Decreasing intrapopulation variation as environments become spectrally narrower suggests that different selective landscapes operate along the gradient. We conclude that the power to predict phenotypic evolution along gradients depends on both the magnitude of environmental change and the selective landscape shape.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

local adaptation, phenotypic evolution, environmental gradient, sensory ecology, visual sensitivity

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ISO 690BERTINETTI CERRATO, Cesar, Andreas HÄRER, Nidal KARAGIC, Axel MEYER, Julián TORRES-DOWDALL, 2024. Repeated Divergence in Opsin Genes Expression Mirrors Photic Habitat Changes in Rapidly Evolving Crater Lake Cichlid Fishes. In: The American Naturalist. University of Chicago Press. 2024, 203(5), S. 604-617. ISSN 0003-0147. eISSN 1537-5323. Verfügbar unter: doi: 10.1086/729420
BibTex
@article{BertinettiCerrato2024-05-01Repea-69364,
  title={Repeated Divergence in Opsin Genes Expression Mirrors Photic Habitat Changes in Rapidly Evolving Crater Lake Cichlid Fishes},
  year={2024},
  doi={10.1086/729420},
  number={5},
  volume={203},
  issn={0003-0147},
  journal={The American Naturalist},
  pages={604--617},
  author={Bertinetti Cerrato, Cesar and Härer, Andreas and Karagic, Nidal and Meyer, Axel and Torres-Dowdall, Julián}
}
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