Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia
Age-based demographic analyses were undertaken to assess the current status of fished stocks of spangled emperor, Lethrinus nebulosus (Forsskål) in the Gascoyne Bioregion of Western Australia. Differences in age and growth characteristics were detected for samples collected from different assessment...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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Wiley-Blackwell Publishing Ltd.
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/52329 |
| _version_ | 1848758901821931520 |
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| author | Marriott, R. Adams, D. Jarvis, N. Moran, M. Newman, Stephen Craine, M. |
| author_facet | Marriott, R. Adams, D. Jarvis, N. Moran, M. Newman, Stephen Craine, M. |
| author_sort | Marriott, R. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Age-based demographic analyses were undertaken to assess the current status of fished stocks of spangled emperor, Lethrinus nebulosus (Forsskål) in the Gascoyne Bioregion of Western Australia. Differences in age and growth characteristics were detected for samples collected from different assessment zones, with North Gascoyne fish observed to grow faster and reach a shorter average maximum length and younger average age than South Gascoyne fish. A significant difference in North Gascoyne catch-at-age data from different time periods demonstrated historical effects of fishing on population age structure. Instantaneous rates of fishing mortality (F) from catch-curve analyses of age-frequency data sampled for the North Gascoyne stock from recreational fishing catches from April 2007 to March 2008 were beyond the limit reference point compared with estimated instantaneous rates of natural mortality (M) (i.e. F>1.5M), indicating that there is currently a risk to the sustainability of that stock. © 2010 Department of Fisheries, Government of Western Australia. |
| first_indexed | 2025-11-14T09:51:21Z |
| format | Journal Article |
| id | curtin-20.500.11937-52329 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:51:21Z |
| publishDate | 2011 |
| publisher | Wiley-Blackwell Publishing Ltd. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-523292017-09-13T15:39:43Z Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia Marriott, R. Adams, D. Jarvis, N. Moran, M. Newman, Stephen Craine, M. Age-based demographic analyses were undertaken to assess the current status of fished stocks of spangled emperor, Lethrinus nebulosus (Forsskål) in the Gascoyne Bioregion of Western Australia. Differences in age and growth characteristics were detected for samples collected from different assessment zones, with North Gascoyne fish observed to grow faster and reach a shorter average maximum length and younger average age than South Gascoyne fish. A significant difference in North Gascoyne catch-at-age data from different time periods demonstrated historical effects of fishing on population age structure. Instantaneous rates of fishing mortality (F) from catch-curve analyses of age-frequency data sampled for the North Gascoyne stock from recreational fishing catches from April 2007 to March 2008 were beyond the limit reference point compared with estimated instantaneous rates of natural mortality (M) (i.e. F>1.5M), indicating that there is currently a risk to the sustainability of that stock. © 2010 Department of Fisheries, Government of Western Australia. 2011 Journal Article http://hdl.handle.net/20.500.11937/52329 10.1111/j.1365-2400.2010.00754.x Wiley-Blackwell Publishing Ltd. restricted |
| spellingShingle | Marriott, R. Adams, D. Jarvis, N. Moran, M. Newman, Stephen Craine, M. Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title | Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title_full | Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title_fullStr | Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title_full_unstemmed | Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title_short | Age-based demographic assessment of fished stocks of Lethrinus nebulosus in the Gascoyne Bioregion of Western Australia |
| title_sort | age-based demographic assessment of fished stocks of lethrinus nebulosus in the gascoyne bioregion of western australia |
| url | http://hdl.handle.net/20.500.11937/52329 |