In the rivers: Multiple adaptive radiations of cyprinid fishes (Labeobarbus) in Ethiopian Highlandsстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 25 августа 2021 г.
Аннотация:Multiple repeated patterns of adaptive radiation were revealed in cyprinid fish inhabiting the compactgeographic region of the Ethiopian Highlands. We found four independently evolved radiations inthe evolutionary hexaploid (2n = 150) Labeobarbus lineage based on matrilineal relationships of>800 individuals. Each radiation displayed similar patterns of mouth phenotype diversification, andincluded ecomorphs/species of the generalized, lipped, scraping (one or two), and large-mouthed (oneto three) types. All radiations were detected in geographically isolated rivers, and originated fromdifferent ancestral populations. This is the first documented case in which numerous parallel radiationsof fishes occurred–via different ways–in a riverine environment. Some radiations are very recent andmonophyletic, while others are older and include ecomorphs that originated in separate mini flocks andlater combined into one. The diversification bursts among Ethiopian Labeobarbus were detected in themid-upper reaches of rivers (1050-1550 m above sea level), which likely offer ecological opportunitiesthat include diverse habitats yet poor fauna (i.e. lower competition and relaxed selection). Thispromising example of parallel evolution of adaptive radiation warrants further investigation.