Water chemistry, and isotopic ratios and fatty acids and alcohols in Calanus finmarchicus CV, norther Mid-Atlantic Ridge ...

• Main Authors: Petursdottir, Hildur, Falk-Petersen, Stig, Hop, Haakon, Gislason, Astthor
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2010
• Subjects: International Polar Year 2007-2008 IPY; Calanus finmarchicus; Iceland; International Polar Year; IPY
• Online Access: https://dx.doi.org/10.1594/pangaea.818238; https://doi.pangaea.de/10.1594/PANGAEA.818238

Fatty acid and alcohol profiles and stable nitrogen and carbon isotope values, d15N and d13C, of Calanus finmarchicus CV were studied in June 2004 to estimate their trophic status along the northern Mid-Atlantic Ridge i.e. the Reykjanes Ridge (RR), extending from Iceland in the north to the productive region of the Sub-Polar Front (SPF) in the south. Two main groups of stations were defined in the study area based on fatty acid (FA) and fatty alcohol compositions, the stations in the RR area constituted one group and the stations in the frontal area constituted another. The sum of relative amounts of the dietary FAs was significantly higher in the RR area than in the frontal area. Conversely, the long-chained FAs, 20:1 and 22:1, were found in significantly lower relative amounts in the RR area than in the frontal area, thus indicating later ascent of the animals in the frontal area. Further support of this is provided by the fatty alcohols ratio 20:1/22:1 which differed significantly between the two areas. ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...