دورية أكاديمية
Repeated morphological diversification in endemic Antarctic fishes of the genus Trematomus
| العنوان: | Repeated morphological diversification in endemic Antarctic fishes of the genus Trematomus |
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| المؤلفون: | Frederich, Bruno, Heindler, Franz M., Christiansen, Henrik, Dettai, Agnès, Van de Putte, Anton P., Volckaert, Filip A.M., Lepoint, Gilles |
| المساهمون: | FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
| المصدر: | Belgian Journal of Zoology, 152, 55-73 (2022-04-13) |
| بيانات النشر: | Royal Belgian Institute of Natural Sciences (RBINS), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | ecomorphology, convergence, head shape, geometric morphometrics, icefishes, macroevolution, microevolution, phylomorphospace, Southern Ocean, Life sciences, Zoology, Environmental sciences & ecology, Aquatic sciences & oceanology, Sciences du vivant, Zoologie, Sciences de l’environnement & écologie, Sciences aquatiques & océanologie |
| الوصف: | The iterative nature of ecomorphological diversification is observed in various groups of animals. However, studies explicitly testing the consistency of morphological variation across and within species are scarce. Antarctic notothenioids represent a textbook example of adaptive radiation in marine fishes. Within Nototheniidae, the endemic Antarctic genus Trematomus consists of 15 extant species, some with documented large intraspecific variability. Here, we quantify head shape disparity in 11 species of Trematomus by landmark-based geometric morphometrics, and we illustrate repeated events of divergence and convergence of their head morphology. Taking advantage of the polymorphism observed in some species of Trematomus, we also show that two closely related species or clades (e.g., Trematomus bernacchii and T. hansoni) are characterised by the same level of morphological disparity as observed at the level of the entire genus. Interestingly, the same main axes of shape variation are shared between and within species, indicating repeated morphological diversification. Overall, we illustrate a similarity of intra- and interspecific patterns of phenotypic diversity providing new insights into the mechanisms that underlie the diversification of Antarctic fishes. Refugia and ecosystem tolerance in the Southern Ocean |
| نوع الوثيقة: | journal article http://purl.org/coar/resource_type/c_6501 article |
| اللغة: | English |
| Relation: | https://www.belgianjournalofzoology.eu/BJZ/article/viewFile/99/145; urn:issn:0777-6276; urn:issn:2295-0451 |
| DOI: | 10.26496/bjz.2022.99 |
| URL الوصول: | https://orbi.uliege.be/handle/2268/289731 |
| حقوق: | open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
| رقم الأكسشن: | edsorb.289731 |
| قاعدة البيانات: | ORBi |
| DOI: | 10.26496/bjz.2022.99 |
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