Abstract：
:Populations subject to anthropogenic contaminants often display altered patterns of genetic variation, including decreased genetic variability. Selective pressures of contaminant exposure are also reflected in differential tolerance between genotypes. An industrial chemical spill in a major eastern Australian waterway in July 2006 resulted in altered patterns of genetic variability in a nearby population of the amphipod, Melita plumulosa for up to one year post-spill, despite the site being declared clean after 48 h. Here, we investigate the toxicant response of three mitochondrial lines naturally occurring at the impacted site by comparing survivorship and life-history trait variables following naphthalene exposure. Overall, M. plumulosa demonstrated differential survivorship between mitochondrial lines under exposure to high concentrations of naphthalene. In addition, we identified differential fecundity and frequencies of gravidity in female amphipods between the mitochondrial haplotypes examined. These findings suggest that the patterns of genetic variability previously identified may be linked with differential tolerance and/or reproductive performance between mitochondrial lineages.
journal_name
Chemospherejournal_title
Chemosphereauthors
Chung PP,Ballard JW,Hyne RVdoi
10.1016/j.chemosphere.2013.05.079subject
Has Abstractpub_date
2013-10-01 00:00:00pages
1064-9issue
6eissn
0045-6535issn
1879-1298pii
S0045-6535(13)00825-4journal_volume
93pub_type
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