Spatial difference in fatty acid and alcohol profiles and stable isotopes values, δ 15 N and δ 13 C, of Calanus finmarchicus along the northern Mid-Atlantic Ridge ...

• Main Authors: Petursdottir, Hildur, Falk-Petersen, Stig, Hop, Haakon, Gislason, Astthor
• Format: Conference Object
• Language: unknown
• Published: ASC 2008 - Theme session C 2024
• Subjects: Ecosystem observation, processes and dynamics; Pressures, impacts, conservation, and management; Mid-Atlantic Ridge; Calanus finmarchicus; Iceland
• Online Access: https://dx.doi.org/10.17895/ices.pub.25243546; https://ices-library.figshare.com/articles/conference_contribution/Spatial_difference_in_fatty_acid_and_alcohol_profiles_and_stable_isotopes_values_15Nand_13C_of_Calanus_finmarchicus_along_the_northern_Mid-Atlantic_Ridge/25243546

No abstracts are to be cited without prior reference to the author.Fatty acid and alcohol profiles and stable nitrogen and carbon isotopes values, δ 15N and δ 13C, of Calanus finmarchicus CV were studied in June 2004 along the northern Mid-Atlantic Ridge (MAR), extending from Iceland in the north to the Charlie-Gibbs Fracture Zone (CGFZ) in the south. There was a significant difference in fatty acid and alcohol compositions between stations along the MAR. The sum of polyunsaturated fatty acids was relatively higher in the northern area than in the southern area. Conversely, the long-chained fatty alcohols, 20:1n9 and 22:1n11, were found in lower amount in the northern area than in the southern area. Interestingly, the fatty alcohols ratio 20:1n9/22:1n11 was relatively high in the north area. The δ 15N values were highest in the CGFZ area indicating higher trophic position. The results will be discussed in the context of different environmental conditions and population structure of C. finmarchicus along the ...