Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system
© 2015, Macmillan Publishers Limited. All rights reserved.The effects of climate change on predatory fishes in deep shelf areas are difficult to predict because complex processes may govern food availability and temperature at depth. We characterised the net impact of recent environmental changes on...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
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Nature Publishing Group
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/52233 |
| _version_ | 1848758878606458880 |
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| author | Nguyen, H. Rountrey, A. Meeuwig, J. Coulson, P. Feng, M. Newman, Stephen Waite, A. Wakefield, Corey Meekan, M. |
| author_facet | Nguyen, H. Rountrey, A. Meeuwig, J. Coulson, P. Feng, M. Newman, Stephen Waite, A. Wakefield, Corey Meekan, M. |
| author_sort | Nguyen, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2015, Macmillan Publishers Limited. All rights reserved.The effects of climate change on predatory fishes in deep shelf areas are difficult to predict because complex processes may govern food availability and temperature at depth. We characterised the net impact of recent environmental changes on hapuku (Polyprion oxygeneios), an apex predator found in continental slope habitats (>200 m depth) by using dendrochronology techniques to develop a multi-decadal record of growth from otoliths. Fish were sampled off temperate south-western Australia, a region strongly influenced by the Leeuwin Current, a poleward-flowing, eastern boundary current. The common variance among individual growth records was relatively low (3.4%), but the otolith chronology was positively correlated (r = 0.61, p < 0.02) with sea level at Fremantle, a proxy for the strength of the Leeuwin Current. The Leeuwin Current influences the primary productivity of shelf ecosystems, with a strong current favouring growth in hapuku. Leeuwin Current strength is predicted to decline under climate change models and this study provides evidence that associated productivity changes may flow through to higher trophic levels even in deep water habitats. |
| first_indexed | 2025-11-14T09:50:59Z |
| format | Journal Article |
| id | curtin-20.500.11937-52233 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:50:59Z |
| publishDate | 2015 |
| publisher | Nature Publishing Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-522332017-09-13T15:38:23Z Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system Nguyen, H. Rountrey, A. Meeuwig, J. Coulson, P. Feng, M. Newman, Stephen Waite, A. Wakefield, Corey Meekan, M. © 2015, Macmillan Publishers Limited. All rights reserved.The effects of climate change on predatory fishes in deep shelf areas are difficult to predict because complex processes may govern food availability and temperature at depth. We characterised the net impact of recent environmental changes on hapuku (Polyprion oxygeneios), an apex predator found in continental slope habitats (>200 m depth) by using dendrochronology techniques to develop a multi-decadal record of growth from otoliths. Fish were sampled off temperate south-western Australia, a region strongly influenced by the Leeuwin Current, a poleward-flowing, eastern boundary current. The common variance among individual growth records was relatively low (3.4%), but the otolith chronology was positively correlated (r = 0.61, p < 0.02) with sea level at Fremantle, a proxy for the strength of the Leeuwin Current. The Leeuwin Current influences the primary productivity of shelf ecosystems, with a strong current favouring growth in hapuku. Leeuwin Current strength is predicted to decline under climate change models and this study provides evidence that associated productivity changes may flow through to higher trophic levels even in deep water habitats. 2015 Journal Article http://hdl.handle.net/20.500.11937/52233 10.1038/srep09044 Nature Publishing Group unknown |
| spellingShingle | Nguyen, H. Rountrey, A. Meeuwig, J. Coulson, P. Feng, M. Newman, Stephen Waite, A. Wakefield, Corey Meekan, M. Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title | Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title_full | Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title_fullStr | Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title_full_unstemmed | Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title_short | Growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| title_sort | growth of a deep-water, predatory fish is influenced by the productivity of a boundary current system |
| url | http://hdl.handle.net/20.500.11937/52233 |