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Annual Report of the U.S. Atlantic Salmon Assessment Committee Report No. 19-2006 Activities
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2007
[PDF-1.99 MB]
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Description:Total return to USA rivers was 1,480; this is the sum of documented returns to traps and returns estimated on selected Maine rivers. Adult salmon returns to USA rivers with traps or weirs totaled 1,422 fish in 2006, 20% less than observed in 2004 and 13% more than returned in 2005. Seventy-nine adult (90% CI = 49 - 122) fish were estimated to return to the rivers with Endangered populations, the 4th lowest for the 1991-2006 time-series. Escapement to natural spawning areas was 1,048 (returns – broodstock + stocked pre-spawn adults). Most returns occurred in Maine, with the Penobscot River accounting for 71% of the total return. Overall, 30% of the adult returns to the USA were 1SW salmon and 70% were MSW salmon. Most (78%) returns were of hatchery smolt origin and the balance (22%) originated from either natural reproduction or hatchery fry. A total of 12,050,800 juvenile salmon (fry, parr, and smolts) and 3,755 adults were stocked, with 473,850 carrying a variety of marks and/or tags (e.g., PIT tags, visual implant elastomer tags, fin clips etc.). Eggs for USA hatchery programs were taken from 483 sea-run females, 3,024 captive/domestic females, and 96 female kelts. The number of females (3,603) contributing was more than 2005 (3,093); and total egg take (20,536,785) was more than in 2005 (17,811,000) and 2004 (20,486,000). Production of farmed salmon in Maine was estimated to be 3,580 metric tonnes in 2006, a decrease from the 5,263 metric tonnes produced in 2005.
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Rights Information:Public Domain
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