A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology
Growth of the Australian bonito, Sarda australis, is described for the first time using data from three different sources. Von Bertalanffy growth functions were fitted to: (1) size-at-age data derived from sectioned sagittal otoliths, (2) monthly length-frequency collections from a commercial line f...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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CSIRO Publishing
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/52070 |
| _version_ | 1848758837595602944 |
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| author | Stewart, J. Robbins, William Rowling, K. Hegarty, A. Gould, A. |
| author_facet | Stewart, J. Robbins, William Rowling, K. Hegarty, A. Gould, A. |
| author_sort | Stewart, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Growth of the Australian bonito, Sarda australis, is described for the first time using data from three different sources. Von Bertalanffy growth functions were fitted to: (1) size-at-age data derived from sectioned sagittal otoliths, (2) monthly length-frequency collections from a commercial line fishery, and (3) tag-recapture data from a long-term cooperative tagging study. Age estimates of S. australis were indirectly validated by examining the percentage of otoliths with opaque edges each month. The best-fitting growth functions for each data source yielded similar results, showing strong seasonal variations in growth rate. Maximum growth occurred during summer, with near cessation of growth apparent during winter. Early growth was very fast, with fish attaining ~30cm fork length (FL) after 3-4 months. Growth of males and females was not significantly different. The oldest fish sampled was estimated to be 3+ years old, while the largest fish aged was 63.8cm FL. Gonadosomatic indices indicated that S. australis has an austral spring/summer spawning period in eastern Australia. A preliminary estimate of the size at first sexual maturity was ~36cm FL for both males and females, corresponding to an age of ~1 year. Journal compilation © CSIRO 2013. |
| first_indexed | 2025-11-14T09:50:20Z |
| format | Journal Article |
| id | curtin-20.500.11937-52070 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:50:20Z |
| publishDate | 2013 |
| publisher | CSIRO Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-520702017-09-13T15:38:22Z A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology Stewart, J. Robbins, William Rowling, K. Hegarty, A. Gould, A. Growth of the Australian bonito, Sarda australis, is described for the first time using data from three different sources. Von Bertalanffy growth functions were fitted to: (1) size-at-age data derived from sectioned sagittal otoliths, (2) monthly length-frequency collections from a commercial line fishery, and (3) tag-recapture data from a long-term cooperative tagging study. Age estimates of S. australis were indirectly validated by examining the percentage of otoliths with opaque edges each month. The best-fitting growth functions for each data source yielded similar results, showing strong seasonal variations in growth rate. Maximum growth occurred during summer, with near cessation of growth apparent during winter. Early growth was very fast, with fish attaining ~30cm fork length (FL) after 3-4 months. Growth of males and females was not significantly different. The oldest fish sampled was estimated to be 3+ years old, while the largest fish aged was 63.8cm FL. Gonadosomatic indices indicated that S. australis has an austral spring/summer spawning period in eastern Australia. A preliminary estimate of the size at first sexual maturity was ~36cm FL for both males and females, corresponding to an age of ~1 year. Journal compilation © CSIRO 2013. 2013 Journal Article http://hdl.handle.net/20.500.11937/52070 10.1071/MF12249 CSIRO Publishing restricted |
| spellingShingle | Stewart, J. Robbins, William Rowling, K. Hegarty, A. Gould, A. A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title | A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title_full | A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title_fullStr | A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title_full_unstemmed | A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title_short | A multifaceted approach to modelling growth of the Australian bonito, Sarda australis (Family Scombridae), with some observations on its reproductive biology |
| title_sort | multifaceted approach to modelling growth of the australian bonito, sarda australis (family scombridae), with some observations on its reproductive biology |
| url | http://hdl.handle.net/20.500.11937/52070 |