| the distribution and host range of species of the blood fluke sanguinicola in british freshwater fish. | the distribution of host range of sanguinicola armata, s. inermis and s. volgensis in british freshwater fish are described. s. inermis has been recorded in carp cyprinus carpio, crucian carp carassius carassius and tench tinca tinca in southern, central and eastern england and in koi carp imported from japan. s. armata has been detected in pike esox lucius and tench and s. volgensis has been found in chub leuciscus cephalus, dace leuciscus leuciscus, perch perca fluviatilis, roach rutilus rutil ... | 1994 | 7706678 |
| 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 ... | 1996 | 8991914 |
| myxobolus buckei sp. n. (myxozoa), a new pathogenic parasite from the spinal column of three cyprinid fishes from the united kingdom. | myxobolus buckei sp. n. is described from the spinal column of leuciscus cephalus (l.), rutilus rutilus (l.) and abramis brama (l.) from freshwater rivers in the north of england. the plasmodia develop within the remnants of the embryonic notochord in the intervertebral spaces. the spores are large, measuring (in microm) 14.0 +/- 0.7 x 11.5 +/- 0.6 (mean +/- sd), smooth, round to ellipsoid in valvular view with several sutural edge markings. the polar capsules are pyriform and of equal size, mea ... | 2003 | 14971593 |
| 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 ... | 2004 | 15471009 |
| 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 ... | 2004 | 15477755 |
| effects of a chemically polluted discharge on the relationship between fecundity and parasitic infections in the chub (leuciscus cephalus) from a river in southern england. | in fish there is a close association between endocrine and immune function that during seasonal changes in reproductive status can affect the fishes susceptibility to parasitic infection. the effects of endocrine-disrupting pollution on this association are not known. the present study investigates the effects of a chemically polluted (ammoniacal nitrogen, zinc, bromide) discharge in cranleigh waters, a river in southern england, on the fecundity and parasitism of chub, leuciscus cephalus, over ... | 2010 | 19756842 |