Eucalyptus leachate inhibits reproduction in a freshwater fish
John R Morrongiello, Nicholas R Bond, David A Crook, Bob BM Wong
Freshwater Biology | WILEY | Published : 2011
Dissolved organic carbon (DOC) can induce lethal and sub-lethal effects in exposed biota via hypoxic blackwater events and the toxicity of leached compounds. Little is known of how DOC exposure affects fish reproduction despite the fact that its release can coincide with spawning-associated flow pulses. River red gum (Eucalyptus camaldulensis) leaf leachate is a major source of DOC in Australian freshwaters and includes the toxic plant secondary metabolites polyphenols and tannins. High concentrations of leachate are released when leaves on floodplains or dry stream channels are inundated by water. Southern pygmy perch (Nannoperca australis) from naturally high and naturally low Eucalyptus l..View full abstract
We thank M. R. and T. Morrongiello for mesocosm construction and fish collection, H., A. and M. C. Morrongiello for data collection and J. Read for laboratory space. H. Morrongiello, R. Jones and anonymous reviewers provided valuable comments that improved this manuscript. This research was financially supported by eWater CRC, the Australian Research Council and Monash University. J. R. Morrongiello was supported by an Australian Postgraduate Award (I) scholarship during this research. Collection and handling of fish was conducted under Monash University School of Biological Sciences Ethics Committee approval (SCI 202007/08) and Fisheries Victoria permit RP 882.