Publications

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contamination by organochlorine compounds in walleye pollock (theragra chalcogramma) from the bering sea, gulf of alaska and the japan sea. 200211980448
biochemical characterisation of alaska pollock, pacific whiting, and threadfin bream surimi as affected by comminution conditions.salt-soluble protein, surface reactive sulfhydryl content, and surface hydrophobicity of alaska pollock, pacific whiting, and threadfin bream surimi were characterised, as affected by various comminution conditions. chopping time/temperatures were explored in consideration of their habitat temperatures. salt-soluble protein (ssp) significantly decreased when chopping time was extended. corresponding to our follow-up study, no relationship between ssp and gel texture was found. surface hydrophobi ...201323265477
prediction of the weight of alaskan pollock using image analysis.determining the size and quality attributes of fish by machine vision is gaining acceptance and increasing use in the seafood industry. objectivity, speed, and record keeping are advantages in using this method. the objective of this work was to develop the mathematical correlations to predict the weight of whole alaskan pollock (theragra chalcogramma) based on its view area from a camera. one hundred and sixty whole pollock were obtained fresh, within 2 d after catch from a kodiak, alaska, proc ...201021535495
genetic differentiation of alaska chinook salmon: the missing link for migratory studies.most information about chinook salmon genetic diversity and life history originates from studies from the west coast usa, western canada and southeast alaska; less is known about chinook salmon from western and southcentral alaska drainages. populations in this large area are genetically distinct from populations to the south and represent an evolutionary legacy of unique genetic, phenotypic and life history diversity. more genetic information is necessary to advance mixed stock analysis applica ...201121429177
nutritive value of fillets and minced flesh from alaska pollock and some underutilized finfish species from the gulf of mexico. 20067096802
a protocol to aid in the diagnosis of occupational asthma to alaska pollock and yellowfin sole. 201222541414
purification and identification of immunomodulating peptides from enzymatic hydrolysates of alaska pollock frame.to prepare immunomodulating peptides from alaska pollock frame (apf) hydrolysates, trypsin was employed for enzymatic hydrolysis, and the immunomodulating activities of the hydrolysates were studied using splenic lymphocytes proliferation assay. the highest activity of the hydrolysates was reached when dh ranged from 15% to 18%. the peptide fractions which exhibited the highest activity were further purified using ion exchange chromatography, gel filtration chromatography, and rp-hplc. the pepti ...201223107696
fractionation and identification of alaska pollock skin collagen-derived mineral chelating peptides.peptides with the ability to chelate dietary minerals have been reported to have potential as functional food ingredients. a collagen tryptic hydrolysate (cth), previously shown to chelate iron, was further investigated for the presence of ca, fe and cu chelating peptides. sequential purification steps, including immobilised metal affinity chromatography (imac) and gel permeation chromatography (gpc) were employed for the separation of chelating peptides. gpc analysis showed that the mineral che ...201525466056
textural improvement of salt-reduced alaska pollack (theragra chalcogramma) roe product by cacl2.salt-reduced alaska pollack roe benefits public health by decreasing nacl intake; however, it has a poor texture with low breaking strength. this study addresses the feasibility of nacl reduction in salted roe products, with focusing on the improvement of breaking strength using cacl2. salted roe products were prepared by immersing alaska pollack roe in either nacl solutions (3.5, 7.0, 15.0, 20.0, and 25.0%) or 7.0% nacl solutions with added cacl2 (0.0, 0.5, 1.0, 2.0, and 3.0%). breaking strengt ...201627451181
interannual and spatial variability in maturity of walleye pollock gadus chalcogrammus and implications for spawning stock biomass estimates in the gulf of alaska.catch quotas for walleye pollock gadus chalcogrammus, the dominant species in the groundfish fishery off alaska, are set by applying harvest control rules to annual estimates of spawning stock biomass (ssb) from age-structured stock assessments. adult walleye pollock abundance and maturity status have been monitored in early spring in shelikof strait in the gulf of alaska for almost three decades. the sampling strategy for maturity status is largely characterized as targeted, albeit opportunisti ...201627736982
enhanced sealing strength of a hydrophobically-modified alaska pollock gelatin-based sealant.the aim of this study was the development of an innovative biocompatible sealant composed of alaska pollock-derived gelatin partially modified with a dodecyl group (c12-apgltn) and a poly(ethylene glycol)-based crosslinker, pentaerythritol poly(ethylene glycol) ether tetrasuccinimidyl glutarate. the burst strength of the developed sealants was measured using porcine aorta and rat lungs. the maximum burst strength of a c12-apgltn-based sealant against the porcine aorta was 4-fold higher than that ...201728294225
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
characterization of protein fractions from immature alaska walleye pollock (theragra chalcogramma) roe.there are good markets for mature pollock roe; however, immature pollock roe is underutilized. the physical and nutritional properties of immature pollock roe (ipr) have not been reported, which limits its potential use as a food ingredient. the objective of this study was to evaluate the physical and nutritional properties of immature pollock roe and soluble and insoluble protein powders made from the immature roe. ipr samples were obtained during the spring pollock harvest from a seafood proce ...200717995752
[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
residues of pbdes in northeastern pacific marine fish: evidence for spatial and temporal trends.in the flesh (skinless fillet) of chinook, chum, coho, pink, and sockeye salmon (oncorhynchus tshawytscha, o. keta, o. kisutch, o. gorbuscha, and o. nerka, respectively), sablefish (anoplopoma fimbria) and walleye pollock (theragra chalcogramma) from several sites in the northeast pacific sampled between 2002 and 2008, tetra- and pentabrominated diphenyl ethers (bdes) (bde 47, 49, 99, and 100) dominated the congener distribution. chinook and sablefish contained the highest concentrations, follow ...201121360729
organochlorine and butyltin residues in walleye pollock (theragra chalcogramma) from bering sea, gulf of alaska and japan sea.persistent organochlorine (oc) and toxic butyltin compounds (bts) were determined in walleye pollock (theragra chalcogramma) collected from gulf of alaska, bering sea and japan sea, during 1991 and 1992. polychlorinated biphenyls (pcbs) and dichlorodiphenyltrichloroethane (ddts) and its metabolites were the most abundant compounds ranging up to 3200 and 2500 ng/g on lipid weight, respectively, followed by chlordane compounds (chls), hexachlorocyclohexane isomers (hchs) and hexachlorobenzene (hcb ...200211833489
isolation of the north american strain of viral hemorrhagic septicemia virus (vhsv) associated with epizootic mortality in two new host species of alaskan marine fish.thousands of dead pacific herring clupea pallasi, pacific hake merluccius productus and walleye pollock theragra chalcogramma were reported in lisianski inlet near pelican, alaska, usa, on august 1, 1998. the pacific hake and pollock continued to die through the end of september. virological examinations of dead fish identified the north american strain of viral hemorrhagic septicemia virus (vhsv) from all 3 species of fish as well as associated high virus titers and possible histopathological l ...199910598280
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
microbial decontamination of dried alaska pollock shreds using corona discharge plasma jet: effects on physicochemical and sensory characteristics.nonthermal techniques for microbial decontamination are becoming more common for ensuring food safety. in this study, a corona discharge plasma jet (cdpj) was used for inactivation of microbial contaminants of dried alaska pollock shreds. corona plasma jet was generated at a current strength of 1.5 a, and a span length of 25 mm was maintained between the electrode tip and the sample. upon the cdpj treatment (0 to 3 min) of dried shreds, microbial contaminants namely aerobic and marine bacteria, ...201626953810
predicting synergistic effects of resources and predators on foraging decisions by juvenile steller sea lions.many theoretical and experimental studies suggest that synergistic interactions between resources and predators influence foraging decisions and their fitness consequences. this framework, however, has been ignored almost completely by hypotheses on causes of the population decline of steller sea lions (ssls) (eumetopias jubatus) in western alaska. by comparing predictions from a dynamic state variable model to empirical data on the behaviour of individuals instrumented with satellite-linked tim ...200918953573
ichthyophonus-infected walleye pollock theragra chalcogramma (pallas) in the eastern bering sea: a potential reservoir of infections in the north pacific.in 2003, the alaska walleye pollock industry reported product quality issues attributed to an unspecified parasite in fish muscle. using molecular and histological methods, we identified the parasite in bering sea pollock as ichthyophonus. infected pollock were identified throughout the study area, and prevalence was greater in adults than in juveniles. this study not only provides the first documented report of ichthyophonus in any fish species captured in the bering sea, but also reveals that ...201423941303
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