Mercury levels in albacore tuna (Thunnus alalunga) and the effects of canning Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/p2676x532

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Mercury is a toxic heavy metal released into the environment from both natural and anthropogenic sources. The organic form of mercury is a potent neurotoxin that is especially dangerous to developing nervous systems. Results of recent studies have caused the Food and Drug Administration (FDA) and the Environmental Protection Agency (EPA) to issue new advisories regarding fish consumption for pregnant women and young children. However, there is concern that other individuals will also significantly reduce their fish consumption, thereby decreasing the potential health benefits of seafood. Additionally, levels of mercury in fish vary depending on factors such as: trophic level in the food chain, size, habitat location, and preparation method. In an investigation into changes in mercury following canning, fifty-six cans containing meat from either the dorsal loin or the ventral flap of 10 troll-caught albacore tuna were tested for total mercury concentration prior to and after canning and retort cooking. The albacore tuna were harvested off the US Pacific Coast during the 2004 season and weighed between 5.4 and 10.2 kg. Tuna meat was packed in cans raw or in water or olive oil, and cans were drained before post-canning analysis. The average concentrations of total mercury were: 0.17 ppm (range 0.09 to 0.24 ppm) in the pre-canned samples and 0.21 ppm (range 0.10 to 0.33 ppm) in the post-canned samples. Although the mercury concentration per gram of tissue was significantly higher following canning, the overall amount of mercury in the samples did not change significantly.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Committee Member
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 8-bit Grayscale) using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Submitted by Tamera Ontko (toscannerosu@gmail.com) on 2011-08-09T20:50:36Z No. of bitstreams: 1 RasmussenRosaleeS2006.pdf: 1147427 bytes, checksum: 992c25fa59fbe97f1319cbfbbe3d944f (MD5)
  • description.provenance : Made available in DSpace on 2011-08-11T23:25:13Z (GMT). No. of bitstreams: 1 RasmussenRosaleeS2006.pdf: 1147427 bytes, checksum: 992c25fa59fbe97f1319cbfbbe3d944f (MD5) Previous issue date: 2006-05-15
  • description.provenance : Approved for entry into archive by Anna Opoien(anna.opoien@oregonstate.edu) on 2011-08-11T23:25:13Z (GMT) No. of bitstreams: 1 RasmussenRosaleeS2006.pdf: 1147427 bytes, checksum: 992c25fa59fbe97f1319cbfbbe3d944f (MD5)
  • description.provenance : Approved for entry into archive by Anna Opoien(anna.opoien@oregonstate.edu) on 2011-08-11T23:03:57Z (GMT) No. of bitstreams: 1 RasmussenRosaleeS2006.pdf: 1147427 bytes, checksum: 992c25fa59fbe97f1319cbfbbe3d944f (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items