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Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
Octopus cyanea is taken as an unregulated, recreationally fished species from the intertidal reefs of Ningaloo, Western Australia. Yet despite its exploitation and importance in many artisanal fisheries throughout the world, little is known about its life history, ecology and vulnerability. We used...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2012
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3422261/ https://www.ncbi.nlm.nih.gov/pubmed/22912898 http://dx.doi.org/10.1371/journal.pone.0043679 |
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author | Herwig, Jade N. Depczynski, Martial Roberts, John D. Semmens, Jayson M. Gagliano, Monica Heyward, Andrew J. |
author_facet | Herwig, Jade N. Depczynski, Martial Roberts, John D. Semmens, Jayson M. Gagliano, Monica Heyward, Andrew J. |
author_sort | Herwig, Jade N. |
collection | PubMed |
description | Octopus cyanea is taken as an unregulated, recreationally fished species from the intertidal reefs of Ningaloo, Western Australia. Yet despite its exploitation and importance in many artisanal fisheries throughout the world, little is known about its life history, ecology and vulnerability. We used stylet increment analysis to age a wild O. cyanea population for the first time and gonad histology to examine their reproductive characteristics. O. cyanea conforms to many cephalopod life history generalisations having rapid, non-asymptotic growth, a short life-span and high levels of mortality. Males were found to mature at much younger ages and sizes than females with reproductive activity concentrated in the spring and summer months. The female dominated sex-ratios in association with female brooding behaviours also suggest that larger conspicuous females may be more prone to capture and suggests that this intertidal octopus population has the potential to be negatively impacted in an unregulated fishery. Size at age and maturity comparisons between our temperate bordering population and lower latitude Tanzanian and Hawaiian populations indicated stark differences in growth rates that correlate with water temperatures. The variability in life history traits between global populations suggests that management of O. cyanea populations should be tailored to each unique set of life history characteristics and that stylet increment analysis may provide the integrity needed to accurately assess this. |
format | Online Article Text |
id | pubmed-3422261 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2012 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-34222612012-08-21 Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea Herwig, Jade N. Depczynski, Martial Roberts, John D. Semmens, Jayson M. Gagliano, Monica Heyward, Andrew J. PLoS One Research Article Octopus cyanea is taken as an unregulated, recreationally fished species from the intertidal reefs of Ningaloo, Western Australia. Yet despite its exploitation and importance in many artisanal fisheries throughout the world, little is known about its life history, ecology and vulnerability. We used stylet increment analysis to age a wild O. cyanea population for the first time and gonad histology to examine their reproductive characteristics. O. cyanea conforms to many cephalopod life history generalisations having rapid, non-asymptotic growth, a short life-span and high levels of mortality. Males were found to mature at much younger ages and sizes than females with reproductive activity concentrated in the spring and summer months. The female dominated sex-ratios in association with female brooding behaviours also suggest that larger conspicuous females may be more prone to capture and suggests that this intertidal octopus population has the potential to be negatively impacted in an unregulated fishery. Size at age and maturity comparisons between our temperate bordering population and lower latitude Tanzanian and Hawaiian populations indicated stark differences in growth rates that correlate with water temperatures. The variability in life history traits between global populations suggests that management of O. cyanea populations should be tailored to each unique set of life history characteristics and that stylet increment analysis may provide the integrity needed to accurately assess this. Public Library of Science 2012-08-17 /pmc/articles/PMC3422261/ /pubmed/22912898 http://dx.doi.org/10.1371/journal.pone.0043679 Text en © 2012 Herwig et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited. |
spellingShingle | Research Article Herwig, Jade N. Depczynski, Martial Roberts, John D. Semmens, Jayson M. Gagliano, Monica Heyward, Andrew J. Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea |
title | Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
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title_full | Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
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title_fullStr | Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
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title_full_unstemmed | Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
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title_short | Using Age-Based Life History Data to Investigate the Life Cycle and Vulnerability of Octopus cyanea
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title_sort | using age-based life history data to investigate the life cycle and vulnerability of octopus cyanea |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3422261/ https://www.ncbi.nlm.nih.gov/pubmed/22912898 http://dx.doi.org/10.1371/journal.pone.0043679 |
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