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||Marine Biotechnology and Resources|
|Type of Document
||Mercury accumulation of yellowfin tuna, Thunnus albacores, in Seychelles, Indian Ocean|
|Date of Defense
||Ninty three yellowfin tuna, Thunnus albacares, the fork length ranged from 80 to 168 cm were collected from the waters around Seychelles by two longline fishing vessels from April to December in 2006. The muscle and liver samples were analyzed for total mercury (THg) and organic mercury (OHg) concentrations.The concentrations of THg and OHg of the muscle were similar to previous studies.|
The concentrations of THg and OHg form the muscles and livers were positive-linearly regressed with the fish of Fork Length larger than 113 cm (big fish group), but only THg concentration of muscle was negative- linearly regressed 80- 112 cm (small fish group). Such patterns were first found in yellowfin tuna. It might be related to the “growth rate” .
Only one THg concentration of liver were over the standard set by the European Commission Decision (1 mg / kg THg wet wt.), other samples were in accordance with standard set by the European Commission Decision and the US-FDA food safty standard (1 mg / kg MeHg wet wt.). According to the dietary recommendations set by the Department of Health, Executive Yuan, yellowfin tuna can replace 86% animal protein source per week of people.
||Jung-Fu Huang - chair|
Chien-Chung Hsu - co-chair
Mao-Sung Kuo - co-chair
Meng-Hsien Chen - advisor
Chiee-Young Chen - advisor
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|Date of Submission