| noradrenaline, dopamine, 5-hydroxytryptamine and tryptophan concentrations in the brains of four cohabiting species of fish. | 1. the concentrations of the neurotransmitters noradrenaline, dopamine and 5-hydroxy-tryptamine and the amino acid tryptophan were determined in the telencephalon, optic lobes and rest of the brains of four species of fish collected from a stream in central saskatchewan. 2. the species investigated were white sucker (catostomus commersoni), longnose sucker (catostomus catostomus), longnosed dace (rhinichthys cataractae) and northern pike (esox lucius). 3. significant differences were found in th ... | 1988 | 2898995 |
| metacercariae of diplostomum spathaceum in the eyes of fishes from yellowstone lake, wyoming. | fish were collected from yellowstone lake, wyoming (usa). metacercariae of diplostomum spathaceum was found in the lens of 11 of 12 longnose suckers (catostomus catostomus). the mean number of metacercariae per sucker was 59 and the average age of the fish was 11.6 yr. there was no correlation between age and intensity of parasites (r = 0.24). of 10 cutthroat trout (salmo clarki) examined, there were metacercariae present in six. the metacercariae were found outside of the lens tissue in the tro ... | 1989 | 2915395 |
| the effects of pulp mill effluent on the sex steroid binding protein in white sucker (catostomus commersoni) and longnose sucker (c catostomus). | the objective of this study was to characterize the effects of pulp mill effluent on the properties of the sex steroid binding protein (sbp) in the plasma of white sucker (catostomus commersoni) and longnose sucker (c. catostomus). sbps which specifically bind estradiol and testosterone with high affinity (k(d) approximately 3 nm) and low capacity (b(max) approximately 73-81 nm) were identified in both species. subsequent studies determined if the properties of the sbp in white sucker exposed to ... | 2003 | 12600684 |
| oxidative stress and sex steroid levels in fish following short-term exposure to pulp-mill effluents. | this study investigates the relationship between oxidative stress and reproductive dysfunction in wild white sucker (catostomus commersoni) with short-term exposures to pulp-mill effluent. hepatic oxidative damage, as quantified using 2-thiobarbituric acid-reactive substances (tbars), was often increased with effluent exposure within 4-8 d, but responses varied by species, sex, and effluent. fatty acyl-coenzyme a (coa) oxidase (fao) and ethoxyresorufin o-deethylase (erod) activities were also si ... | 2005 | 15799451 |
| arsenic concentration and speciation in five freshwater fish species from back bay near yellowknife, nt, canada. | the concentration of total arsenic and five different arsenic species [as(iii), as(v), monomethylarsonic acid (mma), dimethylarsenic acid (dma), and arsenobetaine (asb)], were measured in the muscle, liver and gastrointestinal tract (git) of five different fish species [lake whitefish (coregonus clupeaformis), walleye (stizostedion vitreum), northern pike (esox lucius), white sucker (catostomus commersoni) and longnose sucker (catostomus catostomus)] from back bay, great slave lake, near the cit ... | 2008 | 18214701 |
| associations between omega-3 fatty acids, selenium content, and mercury levels in wild-harvested fish from the dehcho region, northwest territories, canada. | to better understand the risks and benefits of eating wild-harvested fish from the northwest territories, canada, levels of total mercury (hgt) and selenium (se) and composition of omega-3 fatty acid (n-3 fa) were measured in muscle tissue of fish harvested from lakes in the dehcho region, northwest territories, canada. average hgt levels ranged from 0.057 mg/kg (cisco) to 0.551 mg/kg (northern pike), while average n-3 fa concentrations ranged from 101 mg/100 g (burbot) to 1,689 mg/100 g (lake t ... | 2017 | 27905863 |
| a portrait of a sucker using landscape genetics: how colonization and life history undermine the idealized dendritic metapopulation. | dendritic metapopulations have been attributed unique properties by in silico studies, including an elevated genetic diversity relative to a panmictic population of equal total size. these predictions have not been rigorously tested in nature, nor has there been full consideration of the interacting effects among contemporary landscape features, colonization history and life history traits of the target species. we tested for the effects of dendritic structure as well as the relative importance ... | 2016 | 27393723 |
| mitochondrial population structure and post-glacial dispersal of longnose sucker catostomus catostomus in labrador, canada: evidence for multiple refugial origins and limited ongoing gene flow. | two hundred and eighty-seven longnose sucker catostomus catostomus were collected from 14 lakes in labrador, 52 from three lakes in ontario, 43 from two lakes in british columbia and 32 from a lake in yukon; a total of 414 in all. the resulting 34 haplotypes (20 in labrador) contained moderate haplotypic diversity (h = 0·657) and relatively low nucleotide diversity (π = 3·730 × 10(-3) . mean ϕst (0·453, p < 0·05) over all populations revealed distinct genetic structuring among c. catostomus popu ... | 2016 | 27350593 |
| [genetic structure of the siberian sucker (catostomus catostomus rostratus) according to data on sequence variation of the mtdna cytochrome b gene]. | data regarding the structure and variation of the nucleotide sequence of the cytochrome b gene of mitochondrial dna of the siberian sucker from the kolyma river were obtained. analysis of the median network revealed that evolutionary lines diverged from a common ancestor. penetration of the sucker into asia from northern america took place between the early and middle pleistocene. prolonged reproductive isolation of the siberian and northern american suckers led to interspecies divergence with t ... | 2016 | 25735175 |
| [nucleotide variation in the mitochondrial dna cytochrome oxidase 1 gene in the siberian sucker (catostomus catostomus rostratus) from kolyma river]. | this study presents the data of the first molecular genetic analysis of the siberian sucker from kolyma river. polymorphism of the mtdna cytochrome oxidase 1 gene was established. comparative sequence analysis of the gene examined and the genbank variants characterizing suckers from the rivers of canada enabled the suggestion that the sucker penetrated to asia from north america approximately at the end of early and the beginning of the middle pleistocene. it was demonstrated that intrapopulatio ... | 2014 | 25720253 |
| environmental contaminants in fish and their associated risk to piscivorous wildlife in the yukon river basin, alaska. | organochlorine chemical residues and elemental contaminants were measured in northern pike (esox lucius), longnose sucker (catostomus catostomus), and burbot (lota lota) from 10 sites in the yukon river basin (yrb) during 2002. contaminant concentrations were compared to historical yrb data and to toxicity thresholds for fish and piscivorous wildlife from the scientific literature. a risk analysis was conducted to screen for potential hazards to piscivorous wildlife for contaminants that exceede ... | 2006 | 17009129 |
| oxidative stress responses in longnose sucker (catostomus catostomus) exposed to pulp and paper mill and municipal sewage effluents. | while recent evidence indicates that the generation of reactive oxygen species (ros) and associated oxidative damage are frequently observed in fish populations with exposure to pulp and paper mill effluents, the potential for ros generation from municipal sewage effluents has not been addressed. this study investigates the utility of measures of oxidative stress in delineating the effects of both pulp and paper mill and municipal sewage discharges. longnose sucker (catostomus catostomus) were c ... | 2004 | 15063075 |
| lateral line pore diameters correlate with the development of gas bubble trauma signs in several columbia river fishes. | gas bubble trauma (gbt) caused by gas supersaturation of river water continues to be a problem in the columbia river basin. a common indicator of gbt is the percent of the lateral line occluded with gas bubbles; however, this effect has never been examined in relation to lateral line morphology. the effects of 115, 125 and 130% total dissolved gas levels were evaluated on five fish species common to the upper columbia river. trunk lateral line pore diameters differed significantly (p<0.0001) amo ... | 2003 | 12781831 |
| environmental monitoring of bleached kraft pulp mill chlorophenolic compounds in a northern canadian river system. | the environmental transport of pulp mill effluent compounds and the exposure of two fish species has been monitored by parallel analyses of effluent, water column and suspended sediment samples, and fish bile and muscle. compounds analyzed included over 20 chlorophenolic compounds and 12 fatty and resin acids. the concentration of chlorophenols varied with seasonal river flows and mill process changes such as the substitution of chlorine dioxide (clo2) for chlorine gas (cl2) in the bleach plant. ... | 1994 | 8044637 |