caa a22 4500 445893494 CHVBK 20180317145624.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10750-010-0315-7 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0315-7 Fish health changes in Lake Okaro, New Zealand: effects of nutrient remediation, season or eutrophication? [Elektronische Daten] [Michael Landman, Nicholas Ling] The purpose of this investigation was to measure the in situ health of selected biota with respect to a large-scale application of an aluminium-amended zeolite (Z2G1) in Lake Okaro, New Zealand. We hypothesized that, based on previous laboratory toxicity testing, the Z2G1 application would have minimal or no significant health effects on lake fauna. To test this hypothesis, two sampling events were timed around the Z2G1 application to examine the health of two finfish species (Oncorhynchus mykiss and Gobiomorphus cotidianus) and crayfish (Paranephrops planifrons). Additionally, the same species were sampled from the neighbouring Lake Rerewhakaaitu in order to delineate seasonal and lake-specific effects. A general lack of aluminium accumulation in animal tissues following the application indicated that Z2G1-derived aluminium was not readily bioavailable. An unexplained osmoregulatory disturbance, indicated by increased blood plasma ion concentrations in Lake Okaro trout, was observed following the application, but could not be directly attributed to Z2G1 exposure. Changes in fish haematology over time and between lake populations were interpreted as physiological responses to seasonal changes in lake conditions. Using a broad range of specific and non-specific endpoints it was concluded that there were no obvious negative impacts on fish health resulting from Z2G1 exposure. Springer Science+Business Media B.V., 2010 Eutrophication nationallicence Lake restoration nationallicence Zeolite nationallicence Aluminium nationallicence Fish health nationallicence Landman Michael Sustainable Design, Scion, Rotorua, New Zealand aut Ling Nicholas Centre for Biodiversity and Ecology Research, University of Waikato, Hamilton, New Zealand aut Hydrobiologia Springer Netherlands 661/1(2011-02-01), 65-79 0018-8158 661:1<65 2011 661 10750 https://doi.org/10.1007/s10750-010-0315-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0315-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Landman Michael Sustainable Design, Scion, Rotorua, New Zealand aut NATIONALLICENCE 700 1- Ling Nicholas Centre for Biodiversity and Ecology Research, University of Waikato, Hamilton, New Zealand aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 661/1(2011-02-01), 65-79 0018-8158 661:1<65 2011 661 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer