evidence for the hypothesis of strain formation in pomphorhynchus laevis (acanthocephala): an investigation using mitochondrial dna sequences.a hypothesis has been erected stating that in the british isles the acanthocephalan, pomphorhynchus laevis can be separated into 3 strains, an english, irish and marine strain. ecological and morphological evidence exists in support of this hypothesis. an investigation at the molecular level was conducted in order to test the validity of the existing evidence. a mitochondrial gene, subunit i of cytochrome c oxidase was partially sequenced from 3 irish populations of p. laevis, 1 scottish populat ...200415471009
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