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Published (Version of Record)CC BY-NC-ND V4.0, Open Access
Journal article
Elemental analysis of vertebrae discerns diadromous movements of threatened non‐marine elasmobranchs
Journal of fish biology, Vol.103(6), pp.1357-1373
2023
Abstract
River sharks (Glyphis spp.) and some sawfishes (Pristidae) inhabit riverine environments, although their long-term habitat use patterns are poorly known. We investigated the diadromous movements of the northern river shark (Glyphis garricki), speartooth shark (Glyphis glyphis), narrow sawfish (Anoxypristis cuspidata), and largetooth sawfish (Pristis pristis) using in situ laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) on vertebrae to recover elemental ratios over each individual's lifetime. We also measured elemental ratios for the bull shark (Carcharhinus leucas) and a range of inshore and offshore stenohaline marine species to assist in interpretation of results. Barium (Ba) was found to be an effective indicator of freshwater use, whereas lithium (Li) and strontium (Sr) were effective indicators of marine water use. The relationships between Ba and Li and Ba and Sr were negatively correlated, whereas the relationship between Li and Sr was positively correlated. Both river shark species had elemental signatures indicative of prolonged use of upper-estuarine environments, whereas adults appear to mainly use lower-estuarine environments rather than marine environments. Decreases in Li:Ba and Sr:Ba at the end of the prenatal growth zone of P. pristis samples indicated that parturition likely occurs in fresh water. There was limited evidence of prolonged riverine habitat use for A. cuspidata. The results of this study support elemental–environment relationships observed in teleost otoliths and indicate that in situ LA-ICP-MS elemental characterization is applicable to a wide range of elasmobranch species as a discriminator for use and movement across salinity gradients. A greater understanding of processes that lead to element incorporation in vertebrae, and relative concentrations in vertebrae with respect to the ambient environment, will improve the applicability of elemental analysis to understand movements across the life history of elasmobranchs into the future.
Details
- Title
- Elemental analysis of vertebrae discerns diadromous movements of threatened non‐marine elasmobranchs
- Authors/Creators
- Michael I. Grant - James Cook UniversityPeter M. Kyne - Charles Darwin UniversityJulie James - Australian Institute of Tropical Health and MedicineYi Hu - James Cook UniversitySushmita Mukherji - University of TasmaniaYolarnie Amepou - National Department of HealthLeontine Baje - Micronesia Conservation TrustAndrew Chin - James Cook UniversityGrant Johnson - Northern (Arctic) Federal UniversityTegan Lee - Murdoch UniversityBrandon Mahan - James Cook UniversityChristopher Wurster - Australian Institute of Tropical Health and MedicineWilliam T. White - Australian National Fish CollectionColin A. Simpfendorfer - James Cook University
- Publication Details
- Journal of fish biology, Vol.103(6), pp.1357-1373
- Publisher
- John Wiley & Sons Ltd on behalf of Fisheries Society of the British Isles.
- Identifiers
- 991005605568007891
- Copyright
- © 2023 The Authors.
- Murdoch Affiliation
- Centre for Sustainable Aquatic Ecosystems
- Language
- English
- Resource Type
- Journal article
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- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.2 Marine Biology
- 3.2.92 Fisheries Ecology
- Web Of Science research areas
- Fisheries
- Marine & Freshwater Biology
- ESI research areas
- Plant & Animal Science