Distribution and abundance of cephalopods in UK waters: long-term trends and environmental relationships
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Autor/esPierce, G.J. (Graham John); Hastie, L.C. (Lee); Valavanis, V. (Vasilis); MacLeod, C. (Colin); Plotner, J. (Jonathon); Roel, B.A. (Beatriz); Ellis, J. (Jim); Burns, F. (Finlay); Santos, M.B. (María Begoña); Saavedra, C. (Camilo); Greenstreet, S. (Simon)
Fecha de publicación2015
As part of a project which aimed to evaluate the feasibility of developing indicators of marine ecosystem status based on cephalopods, we analysed spatiotemporal variation in abundance,, and environmental relationships, using trawl survey catch data for cephalopods in UK waters (1980-2013) from Cefas and Marine Scotland Science databases. These data presented some challenges, notably the use of several different trawl gears, variable tow durations, and varying levels of taxonomic resolution. Accounting for gear type and tow duration, data were analysed separately for each cephalopod family and season to account for different phases of the life cycles being present at different times of year. The families investigated were Loliginidae, Octopodidae, Ommastrephidade, Sepiidae and Sepiolidae. A GAM framework was used to summarise spatiotemporal variation in abundance at family level and the relationships of spatial and long-term temporal variation with environmental variables, including ...
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