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Effects of climate change on growth and otolith thermometry of sand whiting (Sillago ciliata)7.01 MB
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Journal article
Effects of climate change on growth and otolith thermometry of sand whiting ( Sillago ciliata)
Geochimica et cosmochimica acta, Vol.385, pp.169-183
15/11/2024
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Abstract
Increased water temperature and ocean acidification, due to climate change, is predicted to impact aquatic species’ growth, physiology and calcification rates. The present study investigated how a high-emissions scenario of future water temperature and ocean acidification could influence somatic and otolithic growth, and oxygen isotope fractionation in accreted otolith material, of an important fisheries species, sand whiting (Sillago ciliata) (family Sillaginidae), using an outdoor mesocosm system. The experiment included four treatments with an orthogonal combination of current [∼22 °C], and future [∼25.0 °C] predictions of water temperature and current [∼8.13] and future [∼7.83] pH. Fish somatic and otolithic growth demonstrated a positive response to warmer water temperatures, but were not significantly influenced by increased ocean acidification. Stable oxygen isotopes within otolith material (δ18Ootolith) deposited during the 3-month experimental period, micro-milled from thin-sections and analysed via Isotope Ratio Mass Spectrometry, displayed a negative relationship with water temperature and also varied between acidification treatments. Although acidification increased the intercept of the linear relationship between temperature and oxygen isotope values, the effect was not significant, and the pooled relationship was determined to be δ18Ootolith – δ18Owater = – 0.22*T + 34.34 (R2 = 0.522, p < 0.001). This model demonstrated a similar slope to that for inorganic aragonite and other fish species, but a noticeably higher intercept. This species-specific relationship has fundamental applications for determining water temperature estimates using δ18Ootolith values from wild-caught whiting which may elucidate dispersal and movement patterns, thus offering essential information for informed decision-making amidst a changing climate.
Details
- Title
- Effects of climate change on growth and otolith thermometry of sand whiting ( Sillago ciliata)
- Creators
- Melissa Tan - Southern Cross UniversitySebastian Litchfield - Southern Cross UniversityKarina C. Hall - NSW Department of Primary IndustriesLewis Adler - UNSW SydneyBrendan Kelaher - Southern Cross University
- Publication Details
- Geochimica et cosmochimica acta, Vol.385, pp.169-183
- Publisher
- Elsevier Ltd
- Number of pages
- 15
- Grant note
- Fisheries Research and Development Corporation (FRDC Project): 19-030, CONT21/363 Southern Cross University
The authors extend thanks to P. Wieland and S. Murray at Macquarie University, Sydney, NSW Australia, for use of the micro-mill during otolith sampling and analysis. We acknowledge funding support from the Fisheries Research and Development Corporation (FRDC Project No. 19-030) on behalf of the Australian Government and NSW Department of Primary Industries (CONT21/363) , gained in collaboration with J. Day of CSIRO Oceans and Atmosphere, A. Moore of ABARES, D. Corrie of AFMA, S. Conron of Victorian Fisheries Authority, J. Ovenden of University of Queensland, and M. Coleman and J. Stewart of NSW Department of Primary Industries. We also acknowledge funding support for a postgraduate scholarship (for M. Tan) from Southern Cross University.
- Identifiers
- 991013224928102368
- Copyright
- © 2024 Published by Elsevier Ltd.
- Academic Unit
- Faculty of Science and Engineering; National Marine Science Centre
- Language
- English
- Resource Type
- Journal article