Global proliferation of cephalopods

Zoë A. Doubleday, Thomas A. A. Prowse, Alexander Arkhipkin, Graham J. Pierce, Jayson Semmens, Michael Steer, Stephen C. Leporati, Silvia Lourenco, Antoni Quetglas, Warwick Sauer, Bronwyn M. Gillanders

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Abstract

Human activities have substantially changed the world’s oceans in recent decades, altering marine food webs, habitats and biogeochemical processes [1]. Cephalopods (squid, cuttlefish and octopuses) have a unique set of biological traits, including rapid growth, short lifespans and strong life-history plasticity, allowing them to adapt quickly to changing environmental conditions 2, 3 and 4. There has been growing speculation that cephalopod populations are proliferating in response to a changing environment, a perception fuelled by increasing trends in cephalopod fisheries catch 4 and 5. To investigate long-term trends in cephalopod abundance, we assembled global time-series of cephalopod catch rates (catch per unit of fishing or sampling effort). We show that cephalopod populations have increased over the last six decades, a result that was remarkably consistent across a highly diverse set of cephalopod taxa. Positive trends were also evident for both fisheries-dependent and fisheries-independent time-series, suggesting that trends are not solely due to factors associated with developing fisheries. Our results suggest that large-scale, directional processes, common to a range of coastal and oceanic environments, are responsible. This study presents the first evidence that cephalopod populations have increased globally, indicating that these ecologically and commercially important invertebrates may have benefited from a changing ocean environment.
Original languageEnglish
Pages (from-to)R406-R407
Number of pages2
JournalCurrent Biology
Volume26
Issue number10
DOIs
Publication statusPublished - 23 May 2016

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Cephalopoda
Fisheries
Time series
fisheries
Decapodiformes
Oceans and Seas
Plasticity
time series analysis
oceans
Population
Sampling
Octopodiformes
Sepiidae
Food Chain
Octopodidae
Invertebrates
squid
Human Activities
food webs
Ecosystem

Cite this

Doubleday, Z. A., Prowse, T. A. A., Arkhipkin, A., Pierce, G. J., Semmens, J., Steer, M., ... Gillanders, B. M. (2016). Global proliferation of cephalopods. Current Biology, 26(10), R406-R407. https://doi.org/10.1016/j.cub.2016.04.002

Global proliferation of cephalopods. / Doubleday, Zoë A.; Prowse, Thomas A. A.; Arkhipkin, Alexander ; Pierce, Graham J.; Semmens, Jayson; Steer, Michael; Leporati, Stephen C. ; Lourenco, Silvia; Quetglas, Antoni; Sauer, Warwick; Gillanders, Bronwyn M.

In: Current Biology, Vol. 26, No. 10, 23.05.2016, p. R406-R407.

Research output: Contribution to journalArticle

Doubleday, ZA, Prowse, TAA, Arkhipkin, A, Pierce, GJ, Semmens, J, Steer, M, Leporati, SC, Lourenco, S, Quetglas, A, Sauer, W & Gillanders, BM 2016, 'Global proliferation of cephalopods', Current Biology, vol. 26, no. 10, pp. R406-R407. https://doi.org/10.1016/j.cub.2016.04.002
Doubleday ZA, Prowse TAA, Arkhipkin A, Pierce GJ, Semmens J, Steer M et al. Global proliferation of cephalopods. Current Biology. 2016 May 23;26(10):R406-R407. https://doi.org/10.1016/j.cub.2016.04.002
Doubleday, Zoë A. ; Prowse, Thomas A. A. ; Arkhipkin, Alexander ; Pierce, Graham J. ; Semmens, Jayson ; Steer, Michael ; Leporati, Stephen C. ; Lourenco, Silvia ; Quetglas, Antoni ; Sauer, Warwick ; Gillanders, Bronwyn M. / Global proliferation of cephalopods. In: Current Biology. 2016 ; Vol. 26, No. 10. pp. R406-R407.
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abstract = "Human activities have substantially changed the world’s oceans in recent decades, altering marine food webs, habitats and biogeochemical processes [1]. Cephalopods (squid, cuttlefish and octopuses) have a unique set of biological traits, including rapid growth, short lifespans and strong life-history plasticity, allowing them to adapt quickly to changing environmental conditions 2, 3 and 4. There has been growing speculation that cephalopod populations are proliferating in response to a changing environment, a perception fuelled by increasing trends in cephalopod fisheries catch 4 and 5. To investigate long-term trends in cephalopod abundance, we assembled global time-series of cephalopod catch rates (catch per unit of fishing or sampling effort). We show that cephalopod populations have increased over the last six decades, a result that was remarkably consistent across a highly diverse set of cephalopod taxa. Positive trends were also evident for both fisheries-dependent and fisheries-independent time-series, suggesting that trends are not solely due to factors associated with developing fisheries. Our results suggest that large-scale, directional processes, common to a range of coastal and oceanic environments, are responsible. This study presents the first evidence that cephalopod populations have increased globally, indicating that these ecologically and commercially important invertebrates may have benefited from a changing ocean environment.",
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AU - Leporati, Stephen C.

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N1 - Acknowledgments We thank Nancy Barahona (IFOP), Rosemary Hurst (NIWA), Timothy Emery, FelipeBriceño and Jeremy Lyle (UTAS), Patricia Hobsbawn (ABARES), John Bower (HU), Mitsuo Sakai (TNFRI), Blue Ventures, SHOALS (Rodrigues), and the Fisheries Research and Training Unit (Rodrigues) for their assistance in sourcing time-series and providing catch and effort data, as well as Felipe Briceño and Eriko Hoshino (UTAS) for Spanish- and Japanese-to-English translation, respectively. This paper resulted from a workshop funded by The Environment Institute, University of Adelaide.

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N2 - Human activities have substantially changed the world’s oceans in recent decades, altering marine food webs, habitats and biogeochemical processes [1]. Cephalopods (squid, cuttlefish and octopuses) have a unique set of biological traits, including rapid growth, short lifespans and strong life-history plasticity, allowing them to adapt quickly to changing environmental conditions 2, 3 and 4. There has been growing speculation that cephalopod populations are proliferating in response to a changing environment, a perception fuelled by increasing trends in cephalopod fisheries catch 4 and 5. To investigate long-term trends in cephalopod abundance, we assembled global time-series of cephalopod catch rates (catch per unit of fishing or sampling effort). We show that cephalopod populations have increased over the last six decades, a result that was remarkably consistent across a highly diverse set of cephalopod taxa. Positive trends were also evident for both fisheries-dependent and fisheries-independent time-series, suggesting that trends are not solely due to factors associated with developing fisheries. Our results suggest that large-scale, directional processes, common to a range of coastal and oceanic environments, are responsible. This study presents the first evidence that cephalopod populations have increased globally, indicating that these ecologically and commercially important invertebrates may have benefited from a changing ocean environment.

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