51813_Sturgeon biodioversity an.PDF

range and anthropogenic influences including over- fishing and habitat alteration. We discuss these fac- tors and then evaluate ...

Figure 1.Mitochondrial DNA haplotype frequencies in lake sturgeon from the nothernpartof their range See Table 1 for sample size ...

contemporary range of distribution. Fish from a Missourian refugium would have recolonized the headwaters of the James Bay and H ...

sive closures and openings characterized commer- cial fishing in these locations. In 1961, commercial fishing for sturgeon was c ...

barriers to migration could impact the genetic in- tegrity of the species by fragmenting it into isolated stocks and causing the ...

Figure 4. Status of lake sturgeon in the province of Ontario, Canada. at the narrower cross sections. These can obstruct fish pa ...

Figure 5. Status of lake sturgeon in the province of Quebec, Canada. ural Resources files on individual locations where fish hav ...

as ‘absent’. Very few lake sturgeon were found in also lies between two dams and is considered to ‘rare’ areas, whereas areas de ...

Lake sturgeon are more restricted in their distri- the use of seine nets and set lines and limiting gill bution in Quebec than t ...

correspond to local populations or fish within par- Crossman, E.J. & D.E. McAllister. 1986. Zoogeography of fresh- water fis ...

Left side portrait tilted dorsally of Acipenseroxyrinchus150 cm TL from St. Lawrence River at Kamouraska, Quebec, which now resi ...

Environmental Biology of Fishes 48:311–317,1997. © 1997KluwerAcademicPublishers. Printed in the Netherlands. Lake sturgeon manag ...

Figure 1. Mapof the Menomince River lake sturgeon study area showing hydroelectric dams that fragment the river into sec- tions. ...

Table1. Estimates ofthesize ofthe lake Shown inparenthesesare the 95% confidence intervals sturgeon population from different se ...

Table 4. Estimated number of lake sturgeon in the Lower section of the Menominee River, by size group. TL (cm) 1991 survey < ...

Lower section of river the harvest has ranged be- able for this fishery. There are few published data tween 1 and 46 fish year–1 ...

istration system. The drop in the number of legal size sturgeon in this section and the high exploita- tion rate are cause for c ...

glers continued opportunity to fish for lake stur- tem, Wisconsin. pp. 135–146.In:F.P. Binkowski & S.I. Dorosh- ov (ed.) Nor ...

Landsat image of the lower-reach of the Connecticut River in western Massachusetts and Connecticut. The location of the Holyoke ...

Environmental Biology of Fishes 48:319–334,1997. © 1997 Kluwer Academic Publishers. Printed in the Netherlands Life history, lat ...