hydrocarbon contamination decreases mating success in a marine planktonic copepod海洋浮游桡足类碳氢化合物污染降低交配成功的.pdfVIP

Hydrocarbon Contamination Decreases Mating Success in a Marine Planktonic Copepod Laurent Seuront1,2,3,4* 1 School of Biological Sciences, Flinders University, Adelaide, Australia, 2 Aquatic Sciences, South Australian Research and Development Institute, West Beach, Australia, 3 Centre National de la Recherche Scientifique, UMR LOG 8187, Wimereux, France, 4 Department of Physics, Center for Polymer Studies, Boston University, Boston, Massachusetts, United States of America Abstract The mating behavior and the mating success of copepods rely on chemoreception to locate and track a sexual partner. However, the potential impact of the water-soluble fraction of hydrocarbons on these aspects of copepod reproduction has never been tested despite the widely acknowledged acute chemosensory abilities of copepods. I examined whether three concentrations of the water-soluble fraction of diesel oil (0.01%, 0.1% and 1%) impacts (i) the swimming behavior of both adult males and females of the widespread calanoid copepod Temora longcornis, and (ii) the ability of males to locate, track and mate with females. The three concentrations of the water-soluble fraction of diesel oil (WSF) significantly and non- significantly affect female and male swimming velocities, respectively. In contrast, both the complexity of male and female swimming paths significantly decreased with increasing WSF concentrations, hence suggesting a sex-specific sensitivity to WSF contaminated seawater. In addition, the three WSF concentrations impacted both T. longicornis mating behavior and mating success. Specifically, the ability of males to detect female pheromone trails, to accurately follow trails and to successfully track a female significantly decreased with increasing WSF concentrations. This led to a significant decrease in contact and capture rates from