a biomonitoring plan for assessing potential radionuclide exposure using amchitka island in the aleutian chain of alaska as a case study.with the ending of the cold war, the us and other nations were faced with a legacy of nuclear wastes. for some sites where hazardous nuclear wastes will remain in place, methods must be developed to protect human health and the environment. biomonitoring is one method of assessing the status and trends of potential radionuclide exposure from nuclear waste sites, and of providing the public with early warning of any potential harmful exposure. amchitka island (51 degrees n lat, 179 degrees e long ...200717683832
assessment of competition between fisheries and steller sea lions in alaska based on estimated prey biomass, fisheries removals and predator foraging behaviour.a leading hypothesis to explain the dramatic decline of steller sea lions (eumetopias jubatus) in western alaska during the latter part of the 20th century is a change in prey availability due to commercial fisheries. we tested this hypothesis by exploring the relationships between sea lion population trends, fishery catches, and the prey biomass accessible to sea lions around 33 rookeries between 2000 and 2008. we focused on three commercially important species that have dominated the sea lion ...201525950178
a new method for the rapid detection of atlantic cod (gadus morhua), pacific cod (gadus macrocephalus), alaska pollock (gadus chalcogrammus) and ling (molva molva) using a lateral flow dipstick assay.species-specific lateral flow dipstick (lfd) assays for the identification of atlantic cod (gadus morhua), pacific cod (gadus macrocephalus), alaska pollock (gadus chalcogrammus) and ling (molva molva) in food products were developed. the method comprises a pcr system with four sets of specific primers, for each target species. this step was also devised to dual-labeling of pcr products with biotin and 6-fam, which are then easily read on a lateral flow dipstick, upon which these products are im ...201728530564
biomarkers in fish from prince william sound and the gulf of alaska: test the hypothesis that biomarker levels in fish collected at prince william sound (pws) sites impacted by the 1989 exxon valdez oil spill were higher than those collected at unimpacted sites, a 1999-2000 study collected five fish species and associated benthic sediments from 21 sites in pws and the eastern gulf of alaska (goa). pws sites were divided in three oiling categories based upon 1989 shoreline assessments: nonspill path (nsp), spill path oiled (spo), and spill path not oiled (spno) ...200314524434
interspecific and intraspecific variation in selenium:mercury molar ratios in saltwater fish from the aleutians: potential protection on mercury toxicity by selenium.a number of factors affect the consumption risk from mercury in fish, including mercury levels, seasonal patterns of mercury concentrations, human consumption patterns, and sensitive populations (e.g. pregnant women, fetuses, young children, and yet unknown genetic factors). recently the protective effects of selenium on methylmercury toxicity have been publicized, particularly for saltwater fish. we examine levels of mercury and selenium in several species of fish and seabirds from the aleutian ...201222664537
heavy metals in pacific cod (gadus macrocephalus) from the aleutians: location, age, size, and risk.considerable attention has been devoted to the risks from mercury (hg) and polychlorinated biphenyls (pcb) to high-level predators (including humans) who consume freshwater fish. although the u.s. food and drug administration (fda) issued advisories because of hg for four marine fish species, there are few data on lead (pb), cadmium (cd), or other metals in bering sea fish generally, or on the risk these levels pose to the fish themselves or to consumers of marine fish. levels of arsenic (as), c ...200717966061
[detection of pacific cod and capelin roes in alaska pollack roe product by real-time pcr assay].a rapid and sensitive taqman real-time pcr assay for the detection of pacific cod (gadus macrocephalus) and capelin (mallotus villosus) roes in alaska pollack (theragra chalcogramma) roe product was developed. the primers and the taqman mgb (minor groove binder) probes were designed based on the gene encoding cytochrome b for the specific detection of alaska pollack, pacific cod and capelin. this real-time pcr assay had the detection limit of 0.002 ng/microl mitochondrial dna and showed no cross ...201020595791
risk to consumers from mercury in pacific cod (gadus macrocephalus) from the aleutians: fish age and size effects.while there has been considerable attention devoted to the risks to high level consumers from mercury in freshwater fish, relatively little attention has been devoted to saltwater fish. although the u.s. food and drug administration has issued advisories based on mercury for four saltwater species or groups of fish, there are few data on mercury levels generally, or on the risk these levels pose to the fish themselves or to consumers of marine fish. we examined total mercury levels in liver and ...200717599825
organochlorine contaminants in fishes from coastal waters west of amukta pass, aleutian islands, alaska, usa.organochlorines were examined in liver and stable isotopes in muscle of fishes from the western aleutian islands, alaska, in relation to islands or locations affected by military occupation. pacific cod (gadus macrocephalus), pacific halibut (hippoglossus stenolepis), and rock greenling (hexagrammos lagocephalus) were collected from nearshore waters at contemporary (decommissioned) and historical (world war ii) military locations, as well as at reference locations. total (sigma) polychlorinated ...200919374473
diel vertical migration of adult pacific cod gadus macrocephalus in alaska.the diel vertical migration (dvm) of pacific cod gadus macrocephalus was examined using depth and temperature data from 250 recaptured archival tags deployed on g. macrocephalus in the eastern bering sea and in the gulf of alaska near kodiak island. dvm of two types, deeper during daytime (type i) and deeper during night-time (type ii), occurred frequently (15-40% of all days) in g. macrocephalus released at all sites. most individuals displayed both diel types, with each type of behaviour lasti ...201323808699
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