Observations On Long-Term Changes In Prevalence Of Fish Species With Southern Biogeographic Affinities In The Northern North Sea ...

• Main Authors: Beare, D.J., Burns, F., Jones, E.G., Peach, K., Reid., D.G.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: ASC 2003 - Q - Theme session 2024
• Subjects: Fisheries and aquaculture; Pressures, impacts, conservation, and management; Calanus finmarchicus
• Online Access: https://dx.doi.org/10.17895/ices.pub.25348825; https://ices-library.figshare.com/articles/conference_contribution/Observations_On_Long-Term_Changes_In_Prevalence_Of_Fish_Species_With_Southern_Biogeographic_Affinities_In_The_Northern_North_Sea/25348825

No abstracts are to be cited without prior reference to the author.Recent observations made in the scientific and popular literature have suggested that the characteristics of both marine and terrestrial plant and animal communities are changing rapidly due to increasing global air and sea temperatures. It is well known, for example, that the Lusitanian planktonic copepod, Calanus helgolandicus, almost completely replaced its more boreal congener, Calanus finmarchicus in the northern North Sea between the late 1960s and late1990s. The exact causative mechanisms underpinning this dramatic shift are still poorly understood, but global temperature change is likely to be involved. In this paper we examine the hypothesis that the piscean species composition of the northern North Sea is changing in response to climate. To do this we use a rich dataset on fish abundance collected by trawl during research surveys carried out by Fisheries Research Services, Aberdeen. The surveys cover water depths of less than 200m ...