baseline concentrations of polychlorinated biphenyls and ddt in lake michigan fish, 1971.responding to the recommendations of the lake michigan interstate pesticide committee, the author aimed to establish baseline baseline data on polychlorinated biphenyls (pcb's) and ddt in lake michigan fish in 1971. because the past 2 years had witnessed unprecedented legislative action to protect food resources and other aquatic species near the top of the food chain from persistent hazardous chemicals, the author also attempted to gauge the impact of cooperative legislative action on the quali ...1975810771
parasites of the deepwater sculpin, myoxocephalus thompsoni (cottidae), from lake michigan and lake huron.a total of 190 deepwater sculpins, myoxocephalus thompsoni, collected in 1995 from michigan waters of lake michigan and lake huron was examined for parasites. five parasite species occurred in sculpins from lake michigan with echinorhynchus salmonis being most common. six parasite species infected sculpins from lake huron, with haplonema sp. the most common. haplonema sp. is the only gravid helminth species reported from deepwater sculpins. pleistophora sp. and trichodina sp. infected sculpins f ...19979057717
body burden levels of dioxin, furans, and pcbs among frequent consumers of great lakes sport fish. the great lakes consortium.dioxins, furans, and polychlorinated biphenyls (pcbs) are toxic, persist in the environment, and bioaccumulate to concentrations that can be harmful to humans. sport anglers may be exposed to these residues via consumption of contaminated great lakes (gl) fish. the health departments of five gl states, wisconsin, michigan, ohio, illinois, and indiana, formed a consortium to study body burden levels of chemical residues in fish consumers of lakes michigan, huron, and erie. in fall 1993, a telepho ...199910092416
effects of vitamin b1 (thiamine) deficiency in lake trout (salvelinus namaycush) alevins at hatching stage.the objectives of this study were to examine the relationship between thiamine concentrations in unfertilized eggs and yolksac individuals of lake trout (salvelinus namaycush), along with any associated histopathological changes in the tissues of alevins at the hatching stage. we address these questions in a lake trout population from different spawning grounds of lake michigan (north and south), known for compromised survival due to early mortality syndrome (ems). however, a dichotomous forage ...200919576291
ecosystem transformations of the laurentian great lake michigan by nonindigenous biological invaders.lake michigan, a 58,000-km(2) freshwater inland sea, is large enough to have persistent basin-scale circulation yet small enough to enable development of approximately balanced budgets for water, energy, and elements including carbon and silicon. introduction of nonindigenous species-whether through invasion, intentional stocking, or accidental transplantation-has transformed the lake's ecosystem function and habitat structure. of the 79 nonindigenous species known to have established reproducti ...201322809179
the biological pathway and effect of pcbs on common terns in lake michigan.poly-chlorinated biphenyls (pcbs) have been recognized as a significant contaminant in the great lakes ecosystem. although pcbs are implicated in the reduced survival and reproductive success of several piscivorous bird species, the biological pathway in which pcbs bioaccumulate remains largely unknown. this study investigates the two most likely biological pathways, suggested via research on great lakes sport fish, by which pcbs would be acquired by common terns (sterna hirundo), a piscivorous ...201020725777
egg fatty acid composition from lake trout fed two lake michigan prey fish species.we previously demonstrated that there were significant differences in the egg thiamine content in lake trout salvelinus namaycush fed two lake michigan prey fish (alewife alosa pseudoharengus and bloater coregonus hoyi). lake trout fed alewives produced eggs low in thiamine, but it was unknown whether the consumption of alewives affected other nutritionally important components. in this study we investigated the fatty acid composition of lake trout eggs when females were fed diets that resulted ...200920218501
comparing polybrominated diphenyl ether and polychlorinated biphenyl bioaccumulation in a food web in grand traverse bay, lake michigan.levels of polybrominated diphenyl ethers (bdes) in great lakes salmonids and ambient air have been recently reported, but few studies worldwide have examined the accumulation of bdes within aquatic food webs. here we report some of the first measurements of six bde congeners that are common components of the pentabde commercial mixture within an entire lake michigan food web. bdes were detected in all samples and the dominant bde congener was 2,2',4,4'-tetrabromodiphenyl ether (bde 47). bde 47 l ...200314565581
bioaccumulation and biomagnification of polybrominated diphenyl ethers in a food web of lake michigan.polybrominated diphenyl ethers are hydrophobic chemicals and can biomagnify in food chains. little is known about the biomagnification of pbdes in the lake michigan food web. plankton, diporeia, lake whitefish, lake trout, and chinook salmon were collected from lake michigan in 2006 between april and august. fish liver and muscle and whole invertebrates were analyzed for six pbdes (bde-47, 99, 100, 153, 154, and 209). carbon and nitrogen stable isotope ratios (delta(13)c and delta(15)n) were als ...201019882349
flavobacterium psychrophilum infections in salmonid broodstock and hatchery-propagated stocks of the great lakes basin.bacterial coldwater disease (bcwd), caused by flavobacterium psychrophilum, threatens wild and propagated salmonids worldwide and leads to substantial economic losses. in addition to being horizontally transmitted, f. psychrophilum can be passed from infected parents to their progeny, furthering the negative impacts of this pathogen. in michigan, both feral and captive salmonid broodstocks are the gamete sources used in fishery propagation efforts. a 5-year study was initiated to follow the prev ...201526636411
health benefits and potential risks related to consumption of fish or fish oil.the nutritional benefits of fish consumption relate to the utilization of proteins of high biological value, as well as certain minerals and vitamins that fish provide. fish or fish oil contains omega-3 polyunsaturated fatty acids (pufas) that appear to play several useful roles for human health. conversely, some carcinogenic contaminants are also stored in the adipose tissue of fish. the objective of this paper is to evaluate the potential health benefits and risks related to the consumption of ...200314623484
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