16
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      European sea bass show behavioural resilience to near-future ocean acidification

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Ocean acidification (OA)—caused by rising concentrations of carbon dioxide (CO 2)—is thought to be a major threat to marine ecosystems and has been shown to induce behavioural alterations in fish. Here we show behavioural resilience to near-future OA in a commercially important and migratory marine finfish, the Sea bass ( Dicentrarchus labrax). Sea bass were raised from eggs at 19°C in ambient or near-future OA (1000 µatm pCO 2) conditions and n = 270 fish were observed 59–68 days post-hatch using automated tracking from video. Fish reared under ambient conditions, OA conditions, and fish reared in ambient conditions but tested in OA water showed statistically similar movement patterns, and reacted to their environment and interacted with each other in comparable ways. Thus our findings indicate behavioural resilience to near-future OA in juvenile sea bass. Moreover, simulated agent-based models indicate that our analysis methods are sensitive to subtle changes in fish behaviour. It is now important to determine whether the absences of any differences persist under more ecologically relevant circumstances and in contexts which have a more direct bearing on individual fitness.

          Related collections

          Most cited references10

          • Record: found
          • Abstract: found
          • Article: not found

          idTracker: tracking individuals in a group by automatic identification of unmarked animals.

          Animals in groups touch each other, move in paths that cross, and interact in complex ways. Current video tracking methods sometimes switch identities of unmarked individuals during these interactions. These errors propagate and result in random assignments after a few minutes unless manually corrected. We present idTracker, a multitracking algorithm that extracts a characteristic fingerprint from each animal in a video recording of a group. It then uses these fingerprints to identify every individual throughout the video. Tracking by identification prevents propagation of errors, and the correct identities can be maintained indefinitely. idTracker distinguishes animals even when humans cannot, such as for size-matched siblings, and reidentifies animals after they temporarily disappear from view or across different videos. It is robust, easy to use and general. We tested it on fish (Danio rerio and Oryzias latipes), flies (Drosophila melanogaster), ants (Messor structor) and mice (Mus musculus).
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            "Leading according to need" in self-organizing groups.

            Self-organizing-system approaches have shed significant light on the mechanisms underlying synchronized movements by large groups of animals, such as shoals of fish, flocks of birds, or herds of ungulates. However, these approaches rarely consider conflicts of interest between group members, although there is reason to suppose that such conflicts are commonplace. Here, we demonstrate that, where conflicts exist, individual members of self-organizing groups can, in principle, increase their influence on group movement destination by strategically changing simple behavioral parameters (namely, movement speed, assertiveness, and social attraction range). However, they do so at the expense of an increased risk of group fragmentation and a decrease in movement efficiency. We argue that the resulting trade-offs faced by each group member render it likely that group movements are led by those members for which reaching a particular destination is most crucial or group cohesion is least important. We term this phenomenon leading according to "need" or "social indifference," respectively. Both kinds of leading can occur in the absence of knowledge of or communication about the needs of other group members and without the assumption of altruistic cooperation. We discuss our findings in the light of observations on fish and other vertebrates.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Putting prey and predator into the CO2 equation--qualitative and quantitative effects of ocean acidification on predator-prey interactions.

              Little is known about the impact of ocean acidification on predator-prey dynamics. Herein, we examined the effect of carbon dioxide (CO(2)) on both prey and predator by letting one predatory reef fish interact for 24 h with eight small or large juvenile damselfishes from four congeneric species. Both prey and predator were exposed to control or elevated levels of CO(2). Mortality rate and predator selectivity were compared across CO(2) treatments, prey size and species. Small juveniles of all species sustained greater mortality at high CO(2) levels, while large recruits were not affected. For large prey, the pattern of prey selectivity by predators was reversed under elevated CO(2). Our results demonstrate both quantitative and qualitative consumptive effects of CO(2) on small and larger damselfish recruits respectively, resulting from CO(2)-induced behavioural changes likely mediated by impaired neurological function. This study highlights the complexity of predicting the effects of climate change on coral reef ecosystems. © 2011 Blackwell Publishing Ltd/CNRS.
                Bookmark

                Author and article information

                Journal
                R Soc Open Sci
                R Soc Open Sci
                RSOS
                royopensci
                Royal Society Open Science
                The Royal Society
                2054-5703
                November 2016
                2 November 2016
                2 November 2016
                : 3
                : 11
                : 160656
                Affiliations
                [1 ]Department of Biosciences, College of Science, Swansea University , Singleton Park SA2 8PP, UK
                [2 ]College of Engineering, Swansea University , Bay Campus, Swansea SA1 8EN, UK
                [3 ]Instituto Cajal, Consejo Superior de Investigaciones Científicas , Madrid, Spain
                [4 ]Department of Physics, Physics of Living Systems Group, Massachusetts Institute of Technology , Cambridge, MA, USA
                [5 ]Champalimaud Neuroscience Programme, Champalimaud Center for the Unknown , Lisbon, Portugal
                Author notes
                Author for correspondence: A. J. King e-mail: a.j.king@ 123456swansea.ac.uk

                Electronic supplementary material is available online at https://dx.doi.org/10.6084/m9.figshare.c.3519006.

                Author information
                http://orcid.org/0000-0002-6870-9767
                Article
                rsos160656
                10.1098/rsos.160656
                5180154
                28018656
                3bb1eec6-d108-46b4-81e9-30f1ff3ffa76
                © 2016 The Authors.

                Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

                History
                : 1 September 2016
                : 6 October 2016
                Funding
                Funded by: Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266
                Award ID: EP\M00061\1
                Funded by: Natural Environment Research Council http://dx.doi.org/10.13039/501100000270
                Award ID: NE/H016600/3
                Award ID: NE/H01750X/1
                Funded by: Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659
                Award ID: FU-985/1–1
                Categories
                1001
                14
                69
                Biology (Whole Organism)
                Research Article
                Custom metadata
                November, 2016

                dicentrarchus labrax,environmental change,fisheries,motion tracking,social behaviour

                Comments

                Comment on this article