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Title: Productivity and Change in Fish and Squid in the Southern Ocean
Authors: Caccavo, Jilda Alicia
Christiansen, Henrik
Constable, Andrew J.
Ghigliotti, Laura
Trebilco, Rowan
Brooks, Cassandra M.
Cotte, Cédric
Desvignes, Thomas
Dornan, Tracey
Jones, Christopher D.
Koubbi, Philippe
Saunders, Ryan A.
Strobel, Anneli
Vacchi, Marino
van de Putte, Anton P.
Walters, Andrea
Waluda, Claire M.
Woods, Briannyn L.
Xavier, José C. 
Keywords: marine ecosystem assessment; climate change; conservation management; Antarctic; fisheries; notothenioids; myctophids; squid
Issue Date: 2021
Publisher: Frontiers Media S.A.
Project: Alexander von Humboldt Foundation - Humboldt Research Fellowship for Postdoctoral Researchers 
NSF OPP-1543383 and OPP-1947040 
NERC NE/L002434/1 (NERC GW4+ Doctoral Training Partnership award) 
PNRA 2015/B1.02 [DISMAS – Biological and ecological information on the Antarctic toothfish (Dissostichus mawsoni) in the Ross Sea] 
PNRA 2013/AZ1.18 (RAISE – Integrate Research on Antarctic Silverfish Ecology in the Ross Sea) 
PNRA 2016/AZ1.19 (PILOT – Pieces in place for a research and monitoring program targeting the two key fish species of the establishing Ross Sea MPA) 
Belgian Science Policy Office (BELSPO, contract n FR/36/AN1/AntaBIS) in the Framework of EULifewatch 
Serial title, monograph or event: Frontiers in Ecology and Evolution
Volume: 9
Abstract: Southern Ocean ecosystems are globally important and vulnerable to global drivers of change, yet they remain challenging to study. Fish and squid make up a significant portion of the biomass within the Southern Ocean, filling key roles in food webs from forage to mid-trophic species and top predators. They comprise a diverse array of species uniquely adapted to the extreme habitats of the region. Adaptations such as antifreeze glycoproteins, lipid-retention, extended larval phases, delayed senescence, and energy-conserving life strategies equip Antarctic fish and squid to withstand the dark winters and yearlong subzero temperatures experienced in much of the Southern Ocean. In addition to krill exploitation, the comparatively high commercial value of Antarctic fish, particularly the lucrative toothfish, drives fisheries interests, which has included illegal fishing. Uncertainty about the population dynamics of target species and ecosystem structure and function more broadly has necessitated a precautionary, ecosystem approach to managing these stocks and enabling the recovery of depleted species. Fisheries currently remain the major local driver of change in Southern Ocean fish productivity, but global climate change presents an even greater challenge to assessing future changes. Parts of the Southern Ocean are experiencing oceanwarming, such as the West Antarctic Peninsula, while other areas, such as the Ross Sea shelf, have undergone cooling in recent years. These trends are expected to result in a redistribution of species based on their tolerances to different temperature regimes. Climate variability may impair the migratory response of these species to environmental change, while imposing increased pressures on recruitment. Fisheries and climate change, coupled with related local and global drivers such as pollution and sea ice change, have the potential to produce synergistic impacts that compound the risks to Antarctic fish and squid species. The uncertainty surrounding how different species will respond to these challenges, given their varying life histories, environmental dependencies, and resiliencies, necessitates regular assessment to inform conservation and management decisions. Urgent attention is needed to determine whether the current management strategies are suitably precautionary to achieve conservation objectives in light of the impending changes to the ecosystem.
ISSN: 2296-701X
DOI: 10.3389/fevo.2021.624918
Rights: openAccess
Appears in Collections:FCTUC Ciências da Vida - Artigos em Revistas Internacionais
I&D MARE - Artigos em Revistas Internacionais

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