title: Absorption of metals in mulloway (Argyrosomus japonicus) after ingesting nickel-plated carbon-steel hooks.
abstract: Previous research has alluded to the potential of metals being absorbed by fish after ingesting fishing hooks, which may have adverse effects on fish health and the organisms that consume them. Subsequently, this study aimed to quantify the potential of mulloway (Argyrosomus japonicus) to absorb metals during the decay of ingested nickel-plated carbon-steel hooks. Twenty-five treatment fish were allowed to ingest nickel-plated carbon-steel hooks during angling and then monitored with 25 controls (untreated fish) for up to 42 days for hook ejection and mortality. Blood, liver and muscle samples were collected from treatment, control and 14 wild-caught individuals to determine the concentrations of chromium, cobalt, copper, iron, manganese and nickel. The results showed that increased oxidation influenced hook ejection, and that hook-ingested fish had significantly elevated concentrations of nickel in their liver and blood, but not muscle. This research has shown that there is an avenue for metal absorption from ingested hooks.
authors.affiliation: National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 4321, Coffs Harbour, NSW 2450, Australia; NSW Department of Primary Industries, National Marine Science Centre, PO Box 4321, Coffs Harbour, NSW 2450, Australia. Electronic address: shane.mcgrath@dpi.nsw.gov.au.
authors.forename: Shane P
authors.initials: SP
authors.lastname: McGrath
authors.affiliation: Marine Ecology Research Centre, School of Environment, Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia.
authors.forename: Amanda J
authors.initials: AJ
authors.lastname: Reichelt-Brushett
authors.affiliation: National Marine Science Centre, School of Environment, Science and Engineering, Southern Cross University, PO Box 4321, Coffs Harbour, NSW 2450, Australia; NSW Department of Primary Industries, National Marine Science Centre, PO Box 4321, Coffs Harbour, NSW 2450, Australia.
authors.forename: Paul A
authors.initials: PA
authors.lastname: Butcher
authors.affiliation: Department of Zoology, School of Environmental and Rural Sciences, University of New England, Armidale, NSW 2350, Australia.
authors.forename: Stuart C
authors.initials: SC
authors.lastname: Cairns
mesh_terms: D065567:Absorption, Physiological / Q000502:physiology*; D000818:Animals; D005398:Fisheries / Q000295:instrumentation; D016014:Linear Models; D008099:Liver / Q000378:metabolism; D013058:Mass Spectrometry; D019216:Metals, Heavy / Q000097:blood / Q000378:metabolism / Q000493:pharmacokinetics*; D018482:Muscle, Skeletal / Q000378:metabolism; D009532:Nickel; D010084:Oxidation-Reduction; D010473:Perciformes / Q000378:metabolism*; D013232:Steel
chemical_list: D019216:Metals, Heavy; D013232:Steel; D009532:Nickel
keywords: Angling; Argyrosomus japonicus; Hook oxidation; Metal; Mulloway; Nickel