Wall‐following – Phylogenetic context of an enhanced behaviour in stygomorphic Sinocyclocheilus (Cypriniformes: Cyprinidae) cavefishes DOI Creative Commons
陈兵 Chen Bing, Wenzhang Dai, Xianglin Li

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(6)

Published: June 1, 2024

Abstract With 75 known species, the freshwater fish genus Sinocyclocheilus is largest cavefish radiation in world and shows multiple adaptations for cave‐dwelling (stygomorphic adaptations), which include a range of traits such as eye degeneration (normal‐eyed, micro‐eyed eyeless), depigmentation skin, some presence “horns”. Their behavioural to subterranean environments, however, are poorly understood. Wall‐following (WF) behaviour, where an organism remains close contact with boundary demarcating its habitat when dark, peculiar behaviour observed wide animals enhanced cave dwellers. Hence, we hypothesise that wall‐following also present , possibly eyeless species compared bearing (normal‐/micro‐eyed species). Using 13 representative morphs, designed series assays, based on pre‐existing methods Astyanax mexicanus experiments, examine under three conditions. Our results indicate exhibit significantly intensities WF normal‐eyed forms demonstrating intermediate distance. mtDNA dated phylogeny (chronogram four clades A–D), traced degree these outline common patterns. We show intensity higher dominated by free‐living species. found highly sensitive vibrations, whereas least sensitive. Since presented all given fishes evolved late Miocene, identify this being ancestral enhancement related occupation. Results from diversification‐scale study suggest may be convergent trait across stygomorphic lineages.

Language: Английский

Wall‐following – Phylogenetic context of an enhanced behaviour in stygomorphic Sinocyclocheilus (Cypriniformes: Cyprinidae) cavefishes DOI Creative Commons
陈兵 Chen Bing, Wenzhang Dai, Xianglin Li

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(6)

Published: June 1, 2024

Abstract With 75 known species, the freshwater fish genus Sinocyclocheilus is largest cavefish radiation in world and shows multiple adaptations for cave‐dwelling (stygomorphic adaptations), which include a range of traits such as eye degeneration (normal‐eyed, micro‐eyed eyeless), depigmentation skin, some presence “horns”. Their behavioural to subterranean environments, however, are poorly understood. Wall‐following (WF) behaviour, where an organism remains close contact with boundary demarcating its habitat when dark, peculiar behaviour observed wide animals enhanced cave dwellers. Hence, we hypothesise that wall‐following also present , possibly eyeless species compared bearing (normal‐/micro‐eyed species). Using 13 representative morphs, designed series assays, based on pre‐existing methods Astyanax mexicanus experiments, examine under three conditions. Our results indicate exhibit significantly intensities WF normal‐eyed forms demonstrating intermediate distance. mtDNA dated phylogeny (chronogram four clades A–D), traced degree these outline common patterns. We show intensity higher dominated by free‐living species. found highly sensitive vibrations, whereas least sensitive. Since presented all given fishes evolved late Miocene, identify this being ancestral enhancement related occupation. Results from diversification‐scale study suggest may be convergent trait across stygomorphic lineages.

Language: Английский

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