Journal article
Recruitment sources and dispersal of an invasive fish in a large river system as revealed by otolith chemistry analysis
DA Crook, JI Macdonald, DG McNeil, DM Gilligan, M Asmus, R Maas, J Woodhead
Canadian Journal of Fisheries and Aquatic Sciences | Published : 2013
Abstract
The contributions of nursery habitats to recruitment of non-native common carp (Cyprinus carpio) were estimated via analysis of water and otolith 87Sr/86Sr and otolith trace element concentrations (Mg:Ca, Mn:Ca, Sr:Ca, Ba:Ca) over 3 years in the Lachlan River, Australia. Water samples and otoliths of postlarval carp were analyzed to characterize 87Sr/86Sr and multielemental signatures of nursery habitats. Considerable temporal variation occurred in both water 87Sr/86Sr and otolith multielemental signatures, which limited our ability to directly match water and otolith 87Sr/86Sr in nurseries of the lower catchment. However, spatial variation in multi-elemental signatures was sufficient to all..
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Funding Acknowledgements
This study was funded by the Invasive Animals Co-operative Research Centre (IACRC) and the Lachlan Catchment Management Authority (CMA). We thank Ian Wooden, Dean Hartwell (NSW Department of Primary Industries), Steve Lapidge, Wayne Fulton, Kylie Hall (IACRC), Michelle Jeffries, Alan McGufficke, and Lisa Thurtell (Lachlan CMA) for their support and direction. New South Wales State Water provided access to study sites. Renae Ayres and Andrew Pickworth (Arthur Rylah Institute for Environmental Research) assisted with otolith dissection and preparation. Thanks to Kerryn Herman for assistance with Fig. 1 and two anonymous reviewers for constructive comments on the manuscript. This work was conducted under NSW DPI (Fisheries) animal care and ethics committee animal research authority permit No. 07/09.