2007 Status Review of Atlantic sturgeon - National Marine Fisheries ...

List of Figures and Photos
Figure 1. Reported landings of Atlantic sturgeon (1880 – 2000). Canadian estimates
prior to 1940 only existed for the Saint John fishery. After 1940, landings data include
both Saint John (a) and Saint Lawrence (b) fisheries. U.S. landings are based on
NMFS data and may include shortnose sturgeon prior to 1972, as these species are
difficult to differentiate. Courtesy of Smith and Clugston (1997)…………………….…... 152
Figure 2. Atlantic sturgeon landings from the Saint Lawrence River 1940 – 2005.
Black bars indicate years when a 60 mt quota was in place. Landings data from 1940
– 2000 were estimated from data presented in Trencia et al. (2002). There were no
landings during 1970-1976………………………………………………………………… 153
Figure 3. Atlantic sturgeon landings from the Saint John River 1882 – 2002.
Courtesy of Dadswell (2006), based on data provided by Rogers (1936) and
Canadian Fisheries Statistics………………………………………………………………. 154
Figure 4. Atlantic sturgeon bycatch from a standardized shortnose sturgeon survey
conducted between the periods of 1977-1981 and 1998-2000 in the Kennebec River,
Maine………………………………………………………………………………………. 155
Figure 5. Atlantic sturgeon captures from the Long Island Sound Trawl and
Connecticut DEP surveys. These sturgeon are believed to be of Hudson River origin…… 156
Figure 6. CPUE of Hudson River surveys that captured Atlantic sturgeon by year
(1974-2004) and survey……………………………………………………………………. 157
Figure 7. A comparison between Hudson River CPUE within the mainstem of the
river (Fall Shoals Utility) and New York Bight (New Jersey Trawl Survey) captures.
The Fall Shoals Utility CPUE is multiplied by 10 to adjust the y-axis………………...…...158
Figure 8. CPUE of Atlantic sturgeon from the Delaware River 1991 – 2005 from
three surveys. The Delaware and New Jersey Spring Gill Net Fishery reports mean
#/fisher and the Lower Delaware River Gill Net Survey reports number captured/hr……. 159
Figure 9. Reported catch rates of Atlantic sturgeon from the Chesapeake Bay (1996 –
2005) by survey. VIMS Trawl data are available from 1955 to 2004, however zero
sturgeon were captured between 1990 and 1996. Independent Staked Gill Net Survey
data are available from 1997 to 2004.…………..………..………………………………… 160
Figure 10. A 3-D scatter plot demonstrating how well York, James, and Hudson River
Atlantic sturgeon can be differentiated from one another, using 12 locus nDNA markers... 161
Figure 11. Comparison of total Atlantic sturgeon versus young-of-year captured
during the NC Division of Marine Fisheries, Albemarle Sound Independent Gill Net
Survey 1990 – 2006………………………………………………………………………... 162
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