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Are we ready to track climate-driven shifts in marine species across international boundaries? - a global survey of scientific bottom trawl data


Maureaud, AA and Frelat, R and Pecuchet, L and Shackell, N and Merigot, B and Pinsky, ML and Amador, K and Anderson, SC and Arkhipkin, A and Auber, A and Barri, I and Bell, RJ and Belmaker, J and Beukhof, E and Camara, ML and Guevara-Carrasco, R and Choi, J and Christensen, HT and Conner, J and Cubillos, LA and Diadhiou, HD and Edelist, D and Emblemsvag, M and Ernst, B and Fairweather, TP and Fock, HO and Friedland, KD and Garcia, CB and Gascuel, D and Gislason, H and Goren, M and Guitton, J and Jouffre, D and Hattab, T and Hidalgo, M and Kathena, JN and Knuckey, I and Kide, SO and Koen-Alonso, M and Koopman, M and Kulik, V and Leon, JP and Levitt-Barmats, Y and Lindegren, M and Llope, M and Massiot-Granier, F and Masski, H and McLean, M and Meissa, B and Merillet, L and Mihneva, V and Nunoo, FKE and O'Driscoll, R and O'Leary, CA and Petrova, E and Ramos, JE and Refes, W and Roman-Marcote, E and Siegstad, H and Sobrino, I and Solmundsson, J and Sonin, O and Spies, I and Steingrund, P and Stephenson, F and Stern, N and Tserkova, F and Tserpes, G and Tzanatos, E and van Rijn, I and van Zwieten, PAM and Vasilakopoulos, P and Yepsen, DV and Ziegler, P and Thorson, JT, Are we ready to track climate-driven shifts in marine species across international boundaries? - a global survey of scientific bottom trawl data, Global Change Biology, 27, (2) pp. 220-236. ISSN 1354-1013 (2021) [Refereed Article]

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Copyright Statement

2020 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License, ( which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

DOI: doi:10.1111/gcb.15404


Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of data availability, and mismatch between data and real species distributions. To assess the extent of this challenge, we review the global status and accessibility of ongoing scientific bottom trawl surveys. In total, we gathered metadata for 283,925 samples from 95 surveys conducted regularly from 2001 to 2019. We identified that 59% of the metadata collected are not publicly available, highlighting that the availability of data is the most important challenge to assess species redistributions under global climate change. Given that the primary purpose of surveys is to provide independent data to inform stock assessment of commercially important populations, we further highlight that single surveys do not cover the full range of the main commercial demersal fish species. An average of 18 surveys is needed to cover at least 50% of species ranges, demonstrating the importance of combining multiple surveys to evaluate species range shifts. We assess the potential for combining surveys to track transboundary species redistributions and show that differences in sampling schemes and inconsistency in sampling can be overcome with spatio-temporal modeling to follow species density redistributions. In light of our global assessment, we establish a framework for improving the management and conservation of transboundary and migrating marine demersal species. We provide directions to improve data availability and encourage countries to share survey data, to assess species vulnerabilities, and to support management adaptation in a time of climate-driven ocean changes.

Item Details

Item Type:Refereed Article
Keywords:bottom trawl survey, climate change, demersal fish, fisheries policy, global data synthesis, open science, species distribution, transboundary conservation
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Marine and estuarine ecology (incl. marine ichthyology)
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught fin fish (excl. tuna)
UTAS Author:Ramos, JE (Mr Jorge Ramos Castillejos)
ID Code:147674
Year Published:2021
Web of Science® Times Cited:21
Deposited By:Fisheries and Aquaculture
Deposited On:2021-11-11
Last Modified:2021-12-08
Downloads:5 View Download Statistics

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