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Global proliferation of cephalopods

Citation

Doubleday, Z and Prowse, TAA and Arkhipkin, A and Pierce, GJ and Semmens, J and Steer, M and Leporati, SC and Lourenco, S and Quetglas, A and Sauer, W and Gillanders, BM, Global proliferation of cephalopods, Current Biology, 26, (10) pp. R406-R407. ISSN 0960-9822 (2016) [Refereed Article]

Copyright Statement

© 2016 Elsevier

DOI: doi:10.1016/j.cub.2016.04.002

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.

Item Details

Item Type:Refereed Article
Keywords:cephalopod abundance, marine food webs, anthropogenic change, long-term trends, catch rates
Research Division:Agricultural and Veterinary Sciences
Research Group:Fisheries Sciences
Research Field:Aquatic Ecosystem Studies and Stock Assessment
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - Wild Caught
Objective Field:Wild Caught Edible Molluscs
Author:Semmens, J (Associate Professor Jayson Semmens)
ID Code:114259
Year Published:2016
Web of Science® Times Cited:9
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-02-09
Last Modified:2017-11-15
Downloads:0

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