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Klevjer, Thor A; Martinez, Udane; Boyra, Guillermo; Røstad, Anders; Kaartvedt, Stein; Irigoien, Xabier (2021): Per station summaries of acoustic water column properties during MALASPINA-2010. PANGAEA, https://doi.org/10.1594/PANGAEA.926619

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Abstract:
This file provides daily/per station summaries of daytime and nighttime acoustic data (omitting data recorded within 1 hour of sunrise and sunset), specifically per day and night mesopelagic average nautical area scattering coefficient (NASC 200-1000 m), average total NASC (0-1000 m), and weighted mean depths (WMD) of mesopelagic and total NASC. Migration amplitude is the difference in day and night WMD, day to night ratio is the ratio of daytime to nighttime total NASC (0-1000 m) and migration ratio is calculated from the relative drop in mesopelagic backscatter (NASC 200-1000 m) during night. For details of calculations see Klevjer et al. 2016. Note that the provided positions correspond to the fixed Malapina station at that date, not the start and end point of the data collection.
Keyword(s):
Backscatter; echosounder; mesopelagic organisms
Related to:
Irigoien, Xabier; Klevjer, Thor A; Røstad, Anders; Martinez, Udane; Boyra, Guillermo; Acuña, José Luis; Bode, Antonio; Echevarría, Fidel; González-Gordillo, Juan Ignacio; Hernández-León, Santiago; Agustí, Susana; Aksnes, Dag L; Duarte, Carlos Manuel; Kaartvedt, Stein (2014): Large mesopelagic fishes biomass and trophic efficiency in the open ocean. Nature Communications, 5(1), 3271, https://doi.org/10.1038/ncomms4271
Klevjer, Thor A; Irigoien, Xabier; Røstad, Anders; Fraile-Nuez, Eugenio; Benítez-Barrios, Verónica M; Kaartvedt, Stein (2016): Large scale patterns in vertical distribution and behaviour of mesopelagic scattering layers. Scientific Reports, 6(1), 19873, https://doi.org/10.1038/srep19873
Klevjer, Thor A; Martinez, Udane; Boyra, Guillermo; Røstad, Anders; Kaartvedt, Stein; Irigoien, Xabier (2020): Integrated daytime EK60 echosounder data from Malaspina-2010 cruise. PANGAEA, https://doi.org/10.1594/PANGAEA.923087
Martinez, Udane; Boyra, Guillermo; Irigoien, Xabier; Klevjer, Thor A; Røstad, Anders; Kaartvedt, Stein; Proud, Roland; Brierley, Andrew S (2020): Raw EK60 echosounder data (38 and 120 kHz) collected during the Malaspina 2010 Spanish Circumnavigation Expedition (14th December 2010, Cádiz - 14th July 2011, Cartagena). PANGAEA, https://doi.org/10.1594/PANGAEA.921760
Further details:
MacLennan, David N; Fernandes, Paul G; Dalen, John (2002): A consistent approach to definitions and symbols in fisheries acoustics. ICES Journal of Marine Science, 59(2), 365-369, https://doi.org/10.1006/jmsc.2001.1158
Coverage:
Median Latitude: -2.133819 * Median Longitude: -47.427749 * South-bound Latitude: -38.621333 * West-bound Longitude: -179.523667 * North-bound Latitude: 32.914333 * East-bound Longitude: 151.006167
Date/Time Start: 2010-12-19T00:00:00 * Date/Time End: 2011-07-10T00:00:00
Minimum DEPTH, water: m * Maximum DEPTH, water: 1000 m
Event(s):
MALASPINA_LEG1_003-5 * Latitude: 29.683333 * Longitude: -17.288000 * Date/Time: 2010-12-19T00:00:00 * Campaign: MALASPINA_LEG1 (29HE20101215) * Basis: Hespérides * Method/Device: Echosounder, Simrad EK60
MALASPINA_LEG1_007-5 (MH009_007) * Latitude: 21.450167 * Longitude: -23.454500 * Date/Time: 2010-12-23T00:00:00 * Campaign: MALASPINA_LEG1 (29HE20101215) * Basis: Hespérides * Method/Device: Echosounder, Simrad EK60
MALASPINA_LEG1_008-5 (MH010_008) * Latitude: 20.261167 * Longitude: -24.251167 * Date/Time: 2010-12-24T00:00:00 * Campaign: MALASPINA_LEG1 (29HE20101215) * Basis: Hespérides * Method/Device: Echosounder, Simrad EK60
Size:
4788 data points

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