Dataset Information

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

ABSTRACT: 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.

SUBMITTER: A Maureaud A

PROVIDER: S-EPMC7756400 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

ACCESS DATA

Publications

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

A Maureaud Aurore A Frelat Romain R Pécuchet Laurène L Shackell Nancy N Mérigot Bastien B Pinsky Malin L ML Amador Kofi K Anderson Sean C SC Arkhipkin Alexander A Auber Arnaud A Barri Iça I Bell Richard J RJ Belmaker Jonathan J Beukhof Esther E Camara Mohamed L ML Guevara-Carrasco Renato R Choi Junghwa J Christensen Helle T HT Conner Jason J Cubillos Luis A LA Diadhiou Hamet D HD Edelist Dori D Emblemsvåg Margrete M Ernst Billy B Fairweather Tracey P TP Fock Heino O HO Friedland Kevin D KD Garcia Camilo B CB Gascuel Didier D Gislason Henrik H Goren Menachem M Guitton Jérôme J Jouffre Didier D Hattab Tarek T Hidalgo Manuel M Kathena Johannes N JN Knuckey Ian I Kidé Saïkou O SO Koen-Alonso Mariano M Koopman Matt M Kulik Vladimir V León Jacqueline Palacios JP Levitt-Barmats Ya'arit Y Lindegren Martin M Llope Marcos M Massiot-Granier Félix F Masski Hicham H McLean Matthew M Meissa Beyah B Mérillet Laurène L Mihneva Vesselina V Nunoo Francis K E FKE O'Driscoll Richard R O'Leary Cecilia A CA Petrova Elitsa E Ramos Jorge E JE Refes Wahid W Román-Marcote Esther E Siegstad Helle H Sobrino Ignacio I Sólmundsson Jón J Sonin Oren O Spies Ingrid I Steingrund Petur P Stephenson Fabrice F Stern Nir N Tserkova Feriha F Tserpes Georges G Tzanatos Evangelos E van Rijn Itai I van Zwieten Paul A M PAM Vasilakopoulos Paraskevas P Yepsen Daniela V DV Ziegler Philippe P T Thorson James J

Global change biology 20201110 2

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 a ...[more]

PMID: 33067925

Similar Datasets

Project description:The Mediterranean Sea is a biodiversity hotspot where intense fishing pressure is associated with high bycatch rates of protected species (sea turtles and cetaceans) and top predators (sharks). Since the conservation of these species has become a priority, fishery scientists are faced with the challenge of reducing incidental catch, which entails high rates of mortality. Among the species threatened by fishing activities, the loggerhead turtle (Caretta caretta) is a charismatic species considered as "vulnerable" at the global scale. In the Mediterranean Sea trawl nets are the gears with the highest probability of catching protected species incidentally. A new flexible Turtle Excluder Device (TED) was tested for the first time on commercial bottom trawlers to assess its effectiveness in reducing bycatch in the Mediterranean Sea. Analysis of the total catches of the hauls made with and without the TED showed that the difference in terms of weight was not significant. The catch of the main commercial species showed similar rates without a significant loss of size (i.e. total length) with the exception of the largest anglerfish (Lophius spp.). The bycatch of control nets included mostly rays and sharks, but never turtles, although the authors learned from the crews of other vessels operating in the same areas at the time of the trials that they had caught some loggerhead turtles. Our study demonstrates that TED scan be adopted without significantly affecting commercial catch. This informs fishers and managers for a practical and effective means that may reduce the bycatch of threatened species in coastal Mediterranean demersal multispecies fisheries. The measures involving gear modifications require significant investment but they are technically feasible and are capable of improving the conservation prospects of these endangered species. Besides ensuring normal earnings, the TED induced a significant reduction of debris and litter in the codend, thus reducing catch sorting time and improving catch quality.

Dataset Information

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

Publications

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

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets