Body size, growth and life span: Implications for the polewards range shift of octopus tetricus in south-Eastern Australia
Open accessAbstract
Understanding the response of any species to climate change can be challenging. However, in short-lived species the faster turnover of generations may facilitate the examination of responses associated with longer-term environmental change. Octopus tetricus, a commercially important species, has undergone a recent polewards range shift in the coastal waters of south-eastern Australia, thought to be associated with the southerly extension of the warm East Australian Current. At the cooler temperatures of a polewards distribution limit, growth of a species could be slower, potentially leading to a bigger body size and resulting in a slower population turnover, affecting population viability at the extreme of the distribution. Growth rates, body size, and life span of O. tetricus were examined at the leading edge of a polewards range shift in Tasmanian waters (40°S and 147°E) throughout 2011. Octopus tetricus had a relatively small body size and short lifespan of approximately 11 months that, despite cooler temperatures, would allow a high rate of population turnover and may facilitate the population increase necessary for successful establishment in the new extended area of the range. Temperature, food availability and gender appear to influence growth rate. Individuals that hatched during cooler and more productive conditions, but grew during warming conditions, exhibited faster growth rates and reached smaller body sizes than individuals that hatched into warmer waters but grew during cooling conditions. This study suggests that fast growth, small body size and associated rapid population turnover may facilitate the range shift of O. tetricus into Tasmanian waters.
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With increasing temperatures over time, O. tetricus is particularly susceptible to negative effects imposed by warming, which would lead to a contraction of the species range in mainland Australia, pushing the species into being further pressured by other anthropogenic stressors, despite its recent poleward expansion into Tasmanian waters.
“As such, with increasing temperatures over time, this species is particularly susceptible to negative effects imposed by warming, which would lead to a contraction of the species range in mainland Australia, pushing the species into being further pressured by other anthropogenic stressors, despite its recent poleward expansion into Tasmanian waters (Ramos et al., 2014).”
From Projecting future climate change impacts on the distribution of the ‘Octopus vulgaris species complex’ (2022) · cites this paper as Ramos et al., 2014
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References 80 · Cited by 45
Research works printed but not linked: 7
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- Authors
- Ramos, J. E., Pecl, G. T., Moltschaniwskyj, N. A., Strugnell, J. M., León, R. I., & Semmens, J. M.
- Affiliations
- University of Tasmania (AU)
- University of Newcastle Australia (AU)
- La Trobe University (AU)
- Corresponding author
- Ramos, Jorge E.
- Venue
- PLoS ONE
- Publisher
- Public Library of Science (PLoS)
- Published
- 2014-08-04
- Volume
- 9
- Issue
- 8
- Pages
- e103480
- ISSN
- 1932-6203 (ISSN-L)
- PMC
- PMC4121162
- OpenAlex
- W1997127801
- Cited by
- 45
- References
- 80
- Citations by year
- 2025: 1 · 2024: 5 · 2023: 5 · 2022: 2 · 2021: 3 · 2020: 5 · 2019: 8 · 2018: 3 · 2017: 3 · 2016: 5 · 2015: 4 · 2014: 1
- FWCI
- 4.47
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- PLoS ONE (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- ResearchOnline - JCU (James Cook University) (submittedVersion)
- eCite Digital Repository (University of Tasmania) (submittedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Figshare (submittedVersion, cc-by)
- Figshare (submittedVersion)
- NOVA (University of Newcastle Australia) (submittedVersion)
- Funders
- University of Tasmania
- Biotechnology and Biological Sciences Research Council (BBS/E/C/00005198)
- Topics
- Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Cephalopods and Marine Biology
- Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Biology and Ecology Research
- Keywords
- Octopus tetricus, body size, growth rate, lifespan, population turnover, climate change, East Australian Current, Tasmanian waters, temperature effects on growth, food availability, sex differences in growth, cephalopods, range expansion
- MeSH terms
- Animals, Female, Geography, Life Cycle Stages, Longevity, Male, Models, Biological, Seasons, South Australia, Ecosystem, Body Size, Octopodiformes
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