Population-level shape variation and otolith asymmetry in Diplodus annularis
Abstract Sound detection in fishes relies on the inner ear and peripheral structures, such as calcareous otoliths, which play a crucial role in perceiving movement, orientation, and balance. Otoliths, in particular, respond to various environmental factors including temperature, salinity, and food a...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-87096-3 |
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| author | Spani Federica Kroha Silvio Scacco Umberto Di Giulio Andrea Scalici Massimiliano |
| author_facet | Spani Federica Kroha Silvio Scacco Umberto Di Giulio Andrea Scalici Massimiliano |
| author_sort | Spani Federica |
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| description | Abstract Sound detection in fishes relies on the inner ear and peripheral structures, such as calcareous otoliths, which play a crucial role in perceiving movement, orientation, and balance. Otoliths, in particular, respond to various environmental factors including temperature, salinity, and food availability, making them valuable indicators of ecological conditions. This study applies geometric morphometrics (GMM) to analyze the otolith shape of Diplodus annularis (Linnaeus, 1758) from two distinct populations located in the Gulf of Asinara (Porto Torres, Sardinia) and the northern Adriatic Sea (Le Tegnue). By using GMM techniques, precise and quantifiable differences in otolith morphology were revealed between the two populations, demonstrating significant shape variation. In addition, fluctuating asymmetry (FA), which serves as a marker for developmental stability and environmental stress, was assessed. The results show marked disparities in FA between the populations: samples from Porto Torres exhibited posterior asymmetry, while samples from Le Tegnue showed asymmetry in the anterior region of the otoliths. These findings underscore the sensitivity of GMM in detecting even subtle morphological differences, making it a powerful tool for studying environmental and genetic influences on marine species. |
| format | Article |
| id | doaj-art-51096543fefb4af7bd1ed63438cb1d22 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-51096543fefb4af7bd1ed63438cb1d222025-01-26T12:25:16ZengNature PortfolioScientific Reports2045-23222025-01-0115111910.1038/s41598-025-87096-3Population-level shape variation and otolith asymmetry in Diplodus annularisSpani Federica0Kroha Silvio1Scacco Umberto2Di Giulio Andrea3Scalici Massimiliano4Department of Science and Technology for Sustainable Development and One Health, Università Campus Bio-Medico di RomaDepartment of Sciences, University of Roma TreIstituto superiore per la Ricerca e Protezione Ambientale (ISPRA), National Center of Laboratories – Biology (CN-LAB-BIO)Department of Sciences, University of Roma TreDepartment of Sciences, University of Roma TreAbstract Sound detection in fishes relies on the inner ear and peripheral structures, such as calcareous otoliths, which play a crucial role in perceiving movement, orientation, and balance. Otoliths, in particular, respond to various environmental factors including temperature, salinity, and food availability, making them valuable indicators of ecological conditions. This study applies geometric morphometrics (GMM) to analyze the otolith shape of Diplodus annularis (Linnaeus, 1758) from two distinct populations located in the Gulf of Asinara (Porto Torres, Sardinia) and the northern Adriatic Sea (Le Tegnue). By using GMM techniques, precise and quantifiable differences in otolith morphology were revealed between the two populations, demonstrating significant shape variation. In addition, fluctuating asymmetry (FA), which serves as a marker for developmental stability and environmental stress, was assessed. The results show marked disparities in FA between the populations: samples from Porto Torres exhibited posterior asymmetry, while samples from Le Tegnue showed asymmetry in the anterior region of the otoliths. These findings underscore the sensitivity of GMM in detecting even subtle morphological differences, making it a powerful tool for studying environmental and genetic influences on marine species.https://doi.org/10.1038/s41598-025-87096-3Mediterranean SeaSagittaeGeometric morphometricsIntraspecific variationAnnular seabream. |
| spellingShingle | Spani Federica Kroha Silvio Scacco Umberto Di Giulio Andrea Scalici Massimiliano Population-level shape variation and otolith asymmetry in Diplodus annularis Scientific Reports Mediterranean Sea Sagittae Geometric morphometrics Intraspecific variation Annular seabream. |
| title | Population-level shape variation and otolith asymmetry in Diplodus annularis |
| title_full | Population-level shape variation and otolith asymmetry in Diplodus annularis |
| title_fullStr | Population-level shape variation and otolith asymmetry in Diplodus annularis |
| title_full_unstemmed | Population-level shape variation and otolith asymmetry in Diplodus annularis |
| title_short | Population-level shape variation and otolith asymmetry in Diplodus annularis |
| title_sort | population level shape variation and otolith asymmetry in diplodus annularis |
| topic | Mediterranean Sea Sagittae Geometric morphometrics Intraspecific variation Annular seabream. |
| url | https://doi.org/10.1038/s41598-025-87096-3 |
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