Publications

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colonization and establishment of pomphorhynchus laevis (acanthocephala) in an isolated english river.the successful colonization, establishment and spread of pomphorhynchus laevis in a small, isolated, devon river 128 km from the parasite's nearest focus in dorset was followed over 11 years from 1985. the parasite was first detected in anguilla anguilla and platichthys flesus in 1988: by 1995 it had attained prevalence levels of 22.6% in a. anguilla and 43.6% in p. flesus and also occurred in 100% salmo trutta, 50% cottus gobio and noemacheilus barbatulus. as judged by prevalence, abundance, pr ...19968991914
the parasite community infecting flounders, platichthys flesus, in the tidal thames.the composition of the parasite fauna of the flounder, platichthys flesus, retrieved from two locations in the tidal thames is described in detail for the first time. the combined parasite species list of the flounders from lots road in the upper tideway and west thurrock in the middle tideway consisted of one protozoan (glugea stephani), one monogenean (gyrodactylus sp.), four larval digeneans (cryptocotyle concava, timoniella imbutiforme, t. praeterita, and labratrema minimus), five adult dige ...199910526412
a comparison of freshwater and marine/estuarine strains of pomphorhynchus laevis occurring sympatrically in flounder, platichthys flesus, in the tidal thames.collections of flounder, platichthys flesus, at two sites on the tidal river thames in 1994 and 1995 have, for the first time, revealed the sympatric occurrence of the freshwater and marine/estuarine strains of the acanthocephalan parasite pomphorhynchus laevis. this natural co-occurrence of the strains has been employed to compare infection levels and a range of parasite attributes of the two strains under conditions of sympatry. at both lots road (chelsea) and tilbury the marine/estuarine stra ...200111551313
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
intestinal helminth parasites in flounder platichthys flesus from the river thames: an infracommunity analysis.an analysis was undertaken of intestinal helminth communities in flounder platichthys flesus from two sites on the river thames. a comparison was made between helminth community richness and diversity from these sites at the component and infracommunity levels. at the component community level, a richer and more diverse parasite community was found in flounder from the tilbury location (marine influence) than that from the lots road location (freshwater influence). at the infracommunity level, m ...200415575985
comparison of morphological characters in irish and english populations of the acanthocephalan pomphorhynchus laevis (müller, 1776).pomphorhynchus laevis is believed on ecological evidence to exist as three strains in the british isles. however, the strains have never been shown to be capable of being distinguished using morphological characters. a morphological comparison was made between a sample of p. laevis from salmo trutta in l. feeagh in the west of ireland and a sample from leuciscus cephalus in r. culm in the south of england. the length and width of the trunk, neck, bulb, proboscis and hooks were measured. the numb ...200415477755
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