KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: fatty acids in fish larvae

• Main Authors: Dorssers, Scott, Sswat, Michael, Goldenberg, Silvan Urs
• Format: Dataset
• Language: English
• Published: PANGAEA 2024
• Subjects: AQUACOSM; Calculated; chita; Coastal Upwelling System in a Changing Ocean; CUSCO; DATE/TIME; Day of experiment; Dry mass; Eastern Boundary Upwelling systems; essential fatty acids; Event label; Fatty acids; Fatty acids per individual; Fish; standard length; fish larvae; Humboldt Current System; KOSMOS; KOSMOS_2020; KOSMOS_2020_Laboratory-Baseline; KOSMOS_2020_Mesocosm-M1; KOSMOS_2020_Mesocosm-M2; KOSMOS_2020_Mesocosm-M3; KOSMOS_2020_Mesocosm-M4; KOSMOS_2020_Mesocosm-M5; KOSMOS_2020_Mesocosm-M6; KOSMOS_2020_Mesocosm-M7; KOSMOS_2020_Mesocosm-M8; KOSMOS_2020_Mesocosm-M9; KOSMOS Peru; Laboratory measurement; Long chain highly unsaturated fatty acids of total fatty acids; MESO; mesocosm experiment; Mesocosm label; Monounsaturated fatty acids of total fatty acids; Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean; Peruvian anchovy; plankton food web; Polyunsaturated fatty acids of total fatty acids; Ratio; Sample type; Saturated fatty acids of total fatty acids; Species; unique identification; unique identification (URI); Taxa; Treatment; Arctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.967058

Fatty acids (FA) in fish larvae during the mesocosm experiment in the Peruvian upwelling system near Lima from February-April 2020. Light (ambient = high vs. reduced = low) was manipulated from the beginning (day 0) and upwelling (0 to 60% deep water addition) two weeks into the experiment (day 13). Larvae Peruvian anchovy (Engraulis ringens, 24 days-post-hatch) and chita (Anisotremus scapularis, 44 days-post-hatch) reared in the laboratory were introduced shortly after (day 19). All live fish were caught at the end of the experiment (day 36) by which time most had reached the late larval or early juvenile stage. Whole fish were freeze dried and their FA content and composition determined by gas chromatography. Stomachs had been removed prior to analysis to excluded prey FAs, while all other organs were included. Methodological details in Goldenberg et al. and Thielecke et al. (manuscripts in progress).