The chameleon goby Tridentiger trigonocephalus became prevalent in San Francisco Bay (SFB) and Sydney Harbor (SH) after invasion from Asia. We tested the hypothesis that T. trigonocephalus in SFB and SH have spread principally by an in situ rise, rather from continuing immigration. An in situ rise would be evidenced by reduced genetic diversity indices for mtDNA. mtDNA control regions were sequenced and analyzed for N = 32 specimens from SFB, SH and potential source Tokyo Bay (TB); none showed significant loss of singleton haplotypes relative to an equilibrium population. Haplotype diversity (h = 0.998 ± 0.0085) for SFB was significantly (p < 0.01) higher than h of the populations at TB and SH, which did not differ significantly. Elevated h in SFB over TB suggests multiple source populations admixing within the SFB population, refuting the hypothesis of in situ rise in SFB and SH, also suggesting some individuals descended from TB.
|Advisor:||Wilson, Raymond, Jr.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 50/04M, Masters Abstracts International|
|Subjects:||Genetics, Conservation, Aquatic sciences|
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