Followup on Mark Mc's link to the Oregonian article - this was in the weekly Pacific Coast Federation of Fishermen's Associations "press release":
9:04/04. MERCURY LEVELS IN TROLL-CAUGHT ALBACORE FOUND TO BE MUCH LOWER THAN CANNED VARIETY: Following on a proposed advisory by the U.S. Food & Drug Administration (FDA) for mercury in canned albacore tuna, the Western Fishboat Owners Association (WFOA), contracted with the Oregon State University (OSU) Seafood Laboratory to test troll-caught albacore to determine whether the levels of mercury in those tuna were the same or lower than that tested for canned albacore. The feeling among the WFOA leadership, which represents Canadian, U.S., New Zealand and Pacific Island albacore trollers, was that their fish would have lower levels since the surface caught troll albacore were smaller and younger than the larger, older albacore taken in deep water by longline that are preferred by the canners (see Sublegals, 9:02/03; 8:21/05; 8:19/07; 8:09/06; 7:20/11; 7:14/07; 7:08/04; 7:07/05; 7:06/07; 6:17/12; 6:08/21; 6:06/12; 6:04/05; 5:01/01; 3:16/13).). Although troll albacore is also canned, most of what goes into the can labeled white meat albacore tuna is long-line fish.
In their findings, researchers Tmoko Okada, Rosalee Rasmussen and Michael Morrissey of the OSU Lab reported, "ninety-one albacore tuna (Thunnus alalunga) captured during the 2003 commercial fishing season were tested for mercury content in the fish muscle. Additional information such as location, weight, length, lipid and moisture content were also collected. The fish were harvested between 32.70 degrees north (off Southern California) and 48.30 degrees north (off the coast of British Columbia, Canada) from a period of July to November. Fish weight ranged from 3.14 to 11.62 kg and length of 51 - 84 cm. Mercury content was found to range from a low of 0.027 ug/g (ppm) to a high of 0.26 ug/g in the samples tested. The average mercury content was 0.14 ug/g, that is well below the US FDA and Canadian standards (1.0 ug/g and 0.50 ug/g respectively). There was a positive correlation of length and weight of albacore with mercury content. There was no correlation with date of capture. Results indicate that West Coast troll-caught albacore has low levels of mercury in the edible flesh and are well within international standards for mercury levels in fish."
The findings are good news for trollers, since it means warnings on frequency of consumption or, for certain members of the public, to avoid the fish altogether (e.g., pregnant women, nursing mothers, small children) should not be necessary for these troll-caught tuna. The critical step now is for troll-caught albacore to be distinguished on can labels and in other packaging, such as the increasingly popular frozen loin sections. For more information, call (707) 443-1098 or go to:
http://www.wfoa-tuna.org.