CLADOGENESIS AND LOSS OF THE MARINE LIFE-HISTORY PHASE IN FRESHWATER GALAXIID FISHES (OSMERIFORMES: GALAXIIDAE)

作者: Jonathan M. Waters , Graham P. Wallis

DOI: 10.1554/0014-3820(2001)055[0587:CALOTM]2.0.CO;2

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摘要: Abstract Switches from migratory (diadromous) to nonmigratory (freshwater) life histories are known have occurred repeatedly in some aquatic taxa. However, the significance of loss diadromy as an initiator for speciation remains poorly understood. The rivers New Zealand's South Island house a species flock recently derived galaxiid fishes Galaxias vulgaris complex. Members this complex morphologically and genetically similar diadromous G. brevipinnis found Zealand southeastern Australia. We hypothesised that Island's (at least 10 lineages) represents number independent radiations stock, with repeated diadromy. Sequence data were obtained 31 ingroup samples (G. brevipinnis) plus four outgroup A well-resolved phylogeny based on 5039 base pairs mitochondrial genome suggests has been lost three separate ...

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