Journal article
The chemical signature of retained hooks in mulloway (Argyrosomus japonicus) revealed by otolith microchemistry
Fisheries Research, Vol.186(Part 3), pp.658-664
02/2017
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Abstract
A widely accepted practice to maximize the survival of mandatory or voluntary released aquatic animals that have ingested hooks is to cut the line, leaving the ingested hook in thousands of fish, sharks, turtles and marine invertebrates worldwide. Recent evidence suggests that the chemical composition (mainly metals) of ingested hooks can potentially be absorbed and retained within soft tissues of fish and can subsequently have adverse effects on their health. In this study, we tested the hypothesis that hard tissues (otoliths) should also show a chemical signal of hooking. Using the mulloway (Argyrosomus japonicus) as a case study, we have compared the microchemistry compositions (Ba, Ca, Co, Cr, Mn, and Sr) of the otoliths measured by Solution Inductively Coupled Plasma Mass Spectrometry (SO-ICPMS) among three groups: control fish (artificially-reared), treatment (deep-hooked) and wild fish. The multivariate Redundancy Analysis fitted to test the general chemical composition of the otoliths among groups revealed a significant chemical signature of hooking characterized by an increase in Sr and Co, and in a smaller effect Ca. Moreover, we found otolith microchemistry as a useful method to differentiate between artificially-reared and wild mulloway. Positive results across other taxa and different recreational and commercial fisheries should show the real magnitude of the chemical signals of hook ingestion, its utilization as a biological tag and its consequences for the health of released individuals.
Details
- Title
- The chemical signature of retained hooks in mulloway (Argyrosomus japonicus) revealed by otolith microchemistry
- Creators
- Josep Alós - Leibniz Institute of Freshwater Ecology and Inland FisheriesShane P McGrath - Southern Cross UniversitySílvia Pérez-Mayol - Mediterranean Institute for Advanced StudiesBeatriz Morales-Nin - Mediterranean Institute for Advanced StudiesPaul A Butcher - Southern Cross University
- Publication Details
- Fisheries Research, Vol.186(Part 3), pp.658-664
- Publisher
- Elsevier BV
- Grant note
- The experimental procedure of this study was funded by NSW Department of Primary Industries (NSW Recreational Fishing Trust, National Marine Science Centre and Southern Cross University) and the microchemical analysis by the research project CONFLICT (Spanish Ministry of Economy and Competiveness, grant no. CGL2008-958). JA was supported through a Marie Curie grant (FP7-PEOPLE-2012-IEF, grant no. 327160) and a Juan de la Cierva Post-Doc grant (grant no. FJCI-2014-21239). The salary of SPM was funded by the Spanish Ministry of Economy and Competiveness as part of the program MICINN-PTA (grant no. PTA2010-03812).
- Identifiers
- 991012927095002368
- Copyright
- © 2016 Elsevier B.V. All rights reserved.
- Academic Unit
- National Marine Science Centre
- Language
- English
- Resource Type
- Journal article