| ectoparasitic species of the genus trichodina (ciliophora: peritrichida) parasitising british freshwater fish. | seven species of the genus trichodina ehrenberg, 1838 were identified during a sampling programme of twenty freshwater fish species from approximately sixty sites in scotland, england and wales. species found include: trichodina acuta lom, 1961 from cyprinus carpio l., carassius auratus l., oncorhynchus mykiss (walbaum), salmo trutta l. and phoxinus phoxinus l.; trichodina domerguei wallengren, 1897 from gasterosteus aculeatus l.; trichodina tenuidens faure-fremiet, 1944 from gasterosteus aculea ... | 1998 | 9805782 |
| molecular identity, phylogeny and life cycle of chloromyxum schurovi shul'man & ieshko 2003. | a myxosporean of the genus chloromyxum sp., which sporulates in the kidney tubules, was detected in atlantic salmon, salmo salar l., and brown trout, salmo trutta l., from three sites in scotland. a comparison with other reports of chloromyxum spores in the kidney of european salmonids suggests that they all refer to the same species, chloromyxum schurovi [shul'man bs, ieshko ep (2003). parazitologia 37:246-247]. apart from chloromyxum majori [yasutake wt, wood em (1957). j parasitol 43:633-637] ... | 2006 | 16502317 |
| molecular studies on the seasonal occurrence and development of five myxozoans in farmed salmo trutta l. | five myxozoan species, tetracapsuloides bryosalmonae, sphaerospora truttae, chloromyxum schurovi, chloromyxum truttae and a myxobolus species were detected in farmed brown trout, salmo trutta l. from central scotland. using pcr and in situ hybridization, this study investigated the seasonal occurrence and tissue location of these species in young of the year brown trout. c. schurovi, c. truttae and myxobolus sp. were first detected in brown trout in april, 2 months before t. bryosalmonae and s. ... | 2006 | 16216135 |
| kin-biased distribution in brown trout: an effect of redd location or kin recognition? | a wide range of animals have been reported to show kin-biased behaviours, such as reduced aggressiveness and increased food sharing among relatives. however, less is known about whether wild animals also associate with relatives under natural conditions, which is a prerequisite to facilitate kin-biased behaviours and hence kin selection. we tested, by means of microsatellite polymorphism, correlations between pair-wise relatedness and pair-wise metric distance in wild brown trout (salmo trutta l ... | 2004 | 14666124 |
| long-term trends in ph, aluminium and dissolved organic carbon in scottish fresh waters; implications for brown trout (salmo trutta) survival. | over the past 30 years upland streams and lochs in scotland have shown significant signs of recovery from acidification, particularly in terms of declining concentrations of non-marine sulphate (nm-so(4)). long-term index sites in central and southwest scotland reveal a significant decline in the concentration of biologically important components, notably acidity (h(+)) and labile (toxic) forms of aluminium (al-l), whilst dissolved organic carbon (doc) and complexed forms of aluminium (al-nl) ha ... | 2003 | 12812737 |
| the ecology of endoparasitic helminth infections of brown trout (salmo trutta) and rainbow trout (oncorhynchus mykiss) in scotland. | two hundred and forty brown trout (salmo trutta) and 49 rainbow trout (oncorhynchus mykiss), obtained from 21 locations in central scotland between october 1990 and august 1993, were examined for endoparasitic helminth infections. crepidostomum farionis (digenea) was the most widely distributed helminth species, followed by eubothrium crassum (cestoda), diphyllobothrium dendriticum and d. ditremum (cestoda), neoechinorhynchus rutili (acanthocephala), echinorhynchus truttae (acanthocephala), eust ... | 1995 | 9599425 |
| genetic analysis of infectious pancreatic necrosis virus from scotland. | infectious pancreatic necrosis (ipn) is a highly contagious disease of young salmonid fish, and is one of the most serious economic diseases in aquaculture. in scotland, an increase in ipn virus (ipnv) outbreaks in seawater atlantic salmon, salmo salar, has been reported in recent years. the aim of this study was to analyse the vp2 gene from recent ipnv isolates from scotland, to determine whether there are epidemiological links between ipnv isolates from farms (13), wild fish (17) and the envir ... | 2008 | 18086033 |
| the evolutionary ecology of dwarfism in three-spined sticklebacks. | 1. body size is a defining phenotypic trait, but the ecological causes of its evolution are poorly understood. most studies have considered only a single putative causal agent and have failed to recognise that different environmental agents are often correlated. 2. darwin suggested that although trait variation across populations is often associated with abiotic variation, evolution is more likely to be driven by biotic factors correlated with the abiotic variation. this hypothesis has received ... | 2013 | 23237226 |