KOSMOS 2020 Peru mesocosm study on ecosystem responses to different light and upwelling intensities: fish larvae growth and survival


Fish larvae performance 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). Fish mortality was monitored continuously via carcasses sinking to the sediment trap. This 'Sediment' category of samples is only reliable for counts, while many length and weight measures will be inaccurate due to degradation. While live fish were subsampled during the experiment, not enough individuals could be caught for a proper analysis. Instead, the main sampling of live fish was at the end of the experiment (day 36). Most fish had reached the late larvae or early juvenile stage by that time. Fish length and wet mass were assessed for all these individuals. A subsample of both species was used to establish wet to dry to C to N mass relationships. These were applied to convert wet mass into dry, C and N mass for all other fish. Methodological details in Goldenberg et al. and Thielecke et al. (manuscripts in progress).

DOI https://doi.pangaea.de/10.1594/PANGAEA.967054
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.967054
Creator Goldenberg, Silvan Urs ORCID logo; Sswat, Michael ORCID logo; Aguirre-Velarde, Arturo; Ofelio, Claudia
Publisher PANGAEA
Publication Year 2024
Funding Reference Federal Ministry of Education and Research https://doi.org/10.13039/501100002347 Crossref Funder ID 03F0813A https://foerderportal.bund.de/foekat/jsp/SucheAction.do?actionMode=view&fkz=03F0813A Küstennahe Auftriebsgebiete CUSCO: Auswirkungen geänderter Auftriebsintensitäten auf Struktur, Funktion und Produktivität pelagischer Nahrungsnetze im peruanischen Humboldt-Auftriebsgebiet; Horizon 2020 https://doi.org/10.13039/501100007601 Crossref Funder ID 731065 https://cordis.europa.eu/project/id/731065 Network of Leading European AQUAtic MesoCOSM Facilities Connecting Mountains to Oceans from the Arctic to the Mediterranean
Rights Creative Commons Attribution 4.0 International; Data access is restricted (moratorium, sensitive data, license constraints); https://creativecommons.org/licenses/by/4.0/
OpenAccess false
Resource Type Dataset
Format text/tab-separated-values
Size 26364 data points
Discipline Earth System Research
Spatial Coverage (-77.236W, -12.056S, -77.235E, -12.055N)
Temporal Coverage Begin 2020-03-17T00:00:00Z
Temporal Coverage End 2020-04-04T00:00:00Z