首页|Population- and sex-specific sensitivity of the marine amphipod Allorchestes compressa to metal exposure

Population- and sex-specific sensitivity of the marine amphipod Allorchestes compressa to metal exposure

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  • NETL
  • NSTL
  • Elsevier
The sensitivity to contaminants of natural populations varies greatly depending on their historical exposure and on the sex of the individual. These factors result in great uncertainty in ecotoxicological risk assessments and challenge the protection of marine biodiversity. This study investigated the role of background pollution in the environment in shaping the sensitivity of males and females of the common marine amphipod Allorchestes compressa to the common trace marine pollutant, copper (Cu). Female and male amphipods were collected from two sites: Geelong (the polluted site) and Clifton Springs (the clean site). Amphipods were exposed to Cu treatments of 0, 50, 100, and 250 mu g/L for 10 days, followed by a 10-day recovery period. Cu-exposed males from Geelong showed a reduction in feeding rate at a higher Cu concentration than males from Clifton Springs, suggesting that they have a higher tolerance to Cu than males from Clifton Springs. This can be explained by their higher base level of metallothioneins (MTs) and glutathione-S-transferase (GST), the key physiological responses for detoxification and defence against damages from Cu toxicity. Males showed a higher tolerance to Cu than females. This pattern was similar in both populations, which may be associated with a higher level of GST. During the recovery period, only males from Geelong fully recovered to the control level. Our results emphasize the importance of considering population- and sex-specific sensitivity of invertebrates to contaminants in eco-toxicological risk assessments.

ContaminantToleranceEnvironmental risk assessmentGammaridsGenderMetals

Dong, Dung Thi、Miranda, Ana F.、Carve, Megan、Shen, Hao、Trestrail, Charlene、Dinh, Khuong, V、Nugegoda, Dayanthi

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RMIT Univ, Sch Appl Sci, Ecotoxicol Res Grp, Melbourne, Vic, Australia|Res Inst Marine Fisheries, Dept Marine Conservat, Hai Phong, Vietnam

RMIT Univ, Sch Appl Sci, Ecotoxicol Res Grp, Melbourne, Vic, Australia

Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA|Nha Trang Univ, Dept Fisheries Biol, Nha Trang, Vietnam

2020

10.1016/j.ecoenv.2020.111130

Ecotoxicology and environmental safety

Ecotoxicology and environmental safety

ISSN：0147-6513
年,卷(期)：2020.206(Dec.)
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