Influence of Pleistocene Glaciations and Human Intervention upon Mitochondrial DNA Diversity in White Sturgeon (Acipenser transmontanus) Populations

1992 ◽  
Vol 49 (2) ◽  
pp. 358-367 ◽  
Author(s):  
James R. Brown ◽  
Andrew T. Beckenbach ◽  
Michael J. Smith

The influence of recent genetic bottlenecks on two Northwest Pacific populations of white sturgeon (Acipenser transmontanus) was studied using restriction enzyme site differences in mitochondrial DNA (mtDNA). A total of 10 mtDNA genotypes were detected in 178 sturgeon from the Columbia and Fraser rivers. Nearly 61% of individuals from both rivers had a common genotype. However, one genotype was found only in the Fraser River. Geographical substructuring was not evident in the phylogenetic analysis. The Columbia River, a Pleistocene refugium, is suggested as the source of founders for the Fraser River following the last glacial recession, about 10 000–12 000 yr ago. MtDNA genotypic frequencies were significantly different between the rivers. Estimates of mtDNA (h) and nucleotide (π) diversity were consistently higher for the recently colonized Fraser River compared with the Columbia River refugium. This condition is the reverse of all known studies of mtDNA diversity between refugium and colonized animal populations. Recent overexploitation and habitat destruction are suggested as a severe genetic bottleneck that has reduced mtDNA diversity in Columbia River sturgeon.


1998 ◽  
Vol 33 (1) ◽  
pp. 95-110 ◽  
Author(s):  
W.R. Bennett ◽  
A.P. Farrell

Abstract The primary goal of this study was to investigate the possibility of using early life stages of white sturgeon (Acipenser transmontanus) (eggs, larvae and fry) as a species relevant to the Fraser River, B.C., for the acute and sublethal toxico-logical testing of forest industry effluents. Here we report the first successful acute toxicity tests for 8-day-old larvae and 42-day-old fry exposed to several chemicals known to be released into the Fraser River (i.e., 6 monochlorovanillin [6 MVAN], 4,5 dichloroguaiacol [4,5 DCG], 4,5 dichlorocatechol [4,5 DCAT], pentachlorophenol [PCP], and didecyldimethylammonium chloride [DDAC]). In most cases, white sturgeon fry were at the lower end of the range for acute toxicity values for chlorinated phenolic compounds, when compared with other juvenile fish species, and they were extremely sensitive to DDAC. The larval stage was usually more sensitive than the fry stage. Acute toxicity tests with fertilized eggs were unsuccessful. A postexposure growth study was inconclusive because neither control nor toxicant-exposed larvae and fry withstood the additional handling used for measuring body mass. At 62-days-old, fry were more tolerant of handling. This allowed measurement of their swimming performance. Although we have concerns about the reliability of using larvae for acute toxicity testing at this time, 60-day-old white sturgeon fry would appear to be both a sensitive and relevant species for assessing environmental impacts relevant to the Fraser River.



2017 ◽  
Vol 34 (2) ◽  
pp. 390-397 ◽  
Author(s):  
L. J. Halvorson ◽  
B. J. Cady ◽  
K. M. Kappenman ◽  
B. W. James ◽  
M. A. H. Webb


Author(s):  
Donald D. MacDonald ◽  
Michael G. Ikonomou ◽  
Anna-Lea Rantalaine ◽  
I. Hal Rogers ◽  
David Sutherland ◽  
...  


1999 ◽  
Vol 56 (11) ◽  
pp. 1981-1990 ◽  
Author(s):  
Geoff Veinott ◽  
Tom Northcote ◽  
Marvin Rosenau ◽  
R Douglas Evans

Laser ablation sampling - inductively coupled plasma - mass spectrometry (LAS-ICP-MS) was an effective technique for the comparison of relative Sr concentrations in the opaque growth zones (annuli) in the fin rays of white sturgeon (Acipenser transmontanus). Three of 29 Fraser River white sturgeon (10.3% of the sample) showed significantly higher Sr fin ray concentrations in at least one annulus compared with the remainder of the fin ray, and this was interpreted as evidence of marine migrations. Eleven other individual fish had significantly higher mean Sr concentrations in their first 15 annuli compared with annuli 16-30 but lower than the concentrations of the three putative diadromous fish, and this was interpreted as evidence of time spent in the estuary. Eight Fraser River fish greater than 15 years old showed no significant increase in fin ray Sr concentations in the first 15 annuli, and Sr concentrations remained below 350 ppm throughout their lives. These individuals were considered likely to have spent most of their lives in a freshwater environment. Based on the evidence in this study, it is probable that the majority of white sturgeon in the lower Fraser River are not diadromous, but many spend extended periods of time in the Fraser River estuary as juveniles.



2008 ◽  
Vol 81 (3) ◽  
pp. 225-229 ◽  
Author(s):  
D. T. Gundersen ◽  
M. A. H. Webb ◽  
A. K. Fink ◽  
L. R. Kushner ◽  
G. W. Feist ◽  
...  




1999 ◽  
Vol 15 (4-5) ◽  
pp. 288-288
Author(s):  
M.S. Fitzpatrick ◽  
G.W. Feist ◽  
E.P. Foster ◽  
C.B. Schreck


1970 ◽  
Vol 27 (7) ◽  
pp. 1313-1316 ◽  
Author(s):  
C. Dale Becker

An infection with a marine trematode, Tubulovesicula lindbergi (Layman, 1930) (Digenea: Hemiuridae), was discovered in a resident white sturgeon, Acipenser transmontanus Richardson, taken in the central Columbia River, Washington, USA. Tubulovesicula lindbergi is normally restricted to marine environs by virtue of essential (but still unknown) invertebrate intermediate hosts, but may occur in migratory fish that enter fresh water. Since hydroelectric dams on the Columbia are now effective barriers to the passage of sturgeon, it is postulated that T. lindbergi was transported into the river system by a maturing, anadromous teleost. After the postspawning death of the "transport" teleost host, the sturgeon presumably acquired the infection when scavenging. Consideration of basic synecological relationships supports the hypothesis. The white sturgeon is a new host record for T. lindbergi.



1997 ◽  
Vol 16 (3) ◽  
pp. 479-490 ◽  
Author(s):  
Donald D. MacDonald ◽  
Michael G. Ikonomou ◽  
Anna-Lea Rantalaine ◽  
I. Hal Rogers ◽  
David Sutherland ◽  
...  


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