51813_Sturgeon biodioversity an.PDF

Figure1.Lateral view of adult male shortnose sturgeon Acipenser brevirostrum (94 cm IL) from the Connecticut River, Massachusett ...

son River population has increased since the 1970s concurrent with the decline of Atlantic sturgeon from about 30 000 to 38 000 ...

Figure 2.Comparison of seven northern and north-central pop- ulations with five southern populations for adult abundance. Es- ti ...

Delaware River) use saline water the least. Adults forage and spawn in fresh water for years, then en- ter the fresh/saltwater r ...

tured in 1991 by poachers in the Congaree River, southern and northern shortnose sturgeon, but suf- headwaters of the Santee Riv ...

prespawning Saint John River adults have a 2-step migration and fish must likely move about 45-65 km in spring (Dadswell 1979). ...

data). Savannah River fish held for culture also spawned at 17 - 18°C (Smith et al. 1985). Spawning occurs at moderate river dis ...

year in the Connecticut, Hudson, Savannah, and Altamaha rivers, and in the Saint John River during summer juveniles use the same ...

have a broad niche breadth; thus, the species should be capable of occupying a wide geographic range, many habitats, and produci ...

140) and Cooper rivers (Pinopilis Dam at river km 80) which currently share the upriver reach of the Santee River. In the Santee ...

lumbiaRiver(Anders^16 ).The phenomena of migra- tory sturgeons establishing freshwater residency upstream of dams is not underst ...

variables are closely correlated and provide no con- clusions regarding salinity. However, results of stocking 2-9 week old fish ...

known about small juveniles that may be less able to Conservation avoid impingement. Smith et al.^11 believe the low abundance o ...

tured Fish into existing populations should only be dangered shortnose sturgeon, Acipenser brevirostrum,inthe Delaware estuary. ...

Kieffer, M.&B.Kynard.1996. Spawning ofshortnose sturgeon in the MerrimackRiver, Massachusetts. Trans. Amer. Fish. Soc. 125:1 ...

Environmental Biology of Fishes48:335–346,1997. © 1997 KluwerAcademicPublishers.Printed inthe Netherlands. Status and management ...

original correct spelling is ‘oxyrinchus’ (Gilbert 1992). Thus, the original spelling is used in this pa- per. The species is re ...

some areas, a small fall spawning migration consist- spring and also a substantial portion of the fish har- ing of ripe Atlantic ...

was in flood, 8.1 m and 5.5 m deep, respectively, where eggs were collected. Temperature at both lo- cations was 18.3° C. Additi ...

tic sturgeon occurred during the period 1870-1920. They were initially centered on the Delaware River and the Chesapeake Bay sys ...