This repository was created to store and share the R codes used in the analysis implemented in the Communication Earth & Environment manuscript.
Citation: Perez, José Angel Alvarez; Sant'Ana, Rodrigo (2022): Time series of catch composition, mean catch temperature and thermal preference of demersal species in the Brazilian Meridional Margin (2000-2019). PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.946402 (dataset in review)
Abstract: This data publication includes data on catches reported in the harbours of Santa Catarina state, southern Brazil, between the years 2000 and 2019. Historically, these harbours have concentrated a significant part of the demersal fishing fleet that operates widely on the Brazilian Meridional Margin (BMM), from 21°S to the southern border of Brazilian EEZ (34°S) and from the coastal areas down to 500 m depths. Landed catches were monitored by a research team based on the University of 'Vale do Itajaí' (UNIVALI) along a sequence of scientific projects and contracts developed to meet governmental demands for oceanic and deep fisheries development and management, and in support of the licensing processes of the offshore oil and gas exploration activities. This catch composition time series shows an annual compilation of total catches discriminated by species caught by trawlers (single trawlers, pair or twin trawlers and double trawlers) and gill net industrial fisheries. These species represent altogether over 81% of total reported catch in the period. The remainder amount of landings was reported as groups of species (e.g. sharks) or categories indiscriminated by species and were excluded from the database.The 'Mean Temperature of the Catch (MTC)' was estimated for each year of the time series, as proposed by Cheung et al. (2013). This variable is expressed in degrees Celsius. 'Sea Bottom Temperature (SBT)' was derived from estimates provided by the high-resolution ocean general circulation INALT20 model (Schwarzkopf et al., 2019) for the study period (2000-2019) and was calculated by averaging the temperatures over 0.25° x 0.25° grid cells of the BMM and a water column up to 50 m above the seafloor. This variable is expressed is degrees Celsius. 'Annual volume transports of the Brazil-Malvinas confluence (BCt)' was extracted and compiled from Artana et al. (2019). This index was estimated for the period between 2000 and 2017. More detailed information about this index can be accessed in Artana et al. (2019). This variable expressed in Sverdrups (Sv). 'Simpson diversity index (Dm)' express the diversity of demersal fishing métiers (i.e. combination of target species, gear, and time of the year) operating each year of the time series, as determined by a process of classification of individual fishing trips. Catches of each métier operating during each year of time series summed and used to calculate Dm using the Simpson species diversity index formulation. The temperature preference/affinities data was obtained from global compilations made available by Cheung et al. (2013) and in FishBase (Froese and Pauly, 2022). In both compilations, thermal preferences derive from considerations about the species distribution ranges and sea surface temperature maps (e.g. Cheung et al., 2013 supplementary material). Each species considered here was assigned global species identifications or references like FAO ISSCAAP, FAO TAXOCODE, FAO CODE ASFIS 3A, AphiaID, and ITIS/TSN.
Keyword(s): Catch composition; climate change; SW Atlantic
Further details: - Artana, Camila; Provost, Christine; Lellouche, Jean-Michel; Rio, Marie-Hélène; Ferrari, Ramiro; Sennéchael, Nathalie (2019): The Malvinas Current at the Confluence With the Brazil Current: Inferences From 25 Years of Mercator Ocean Reanalysis. Journal of Geophysical Research: Oceans, 124(10), 7178-7200, https://doi.org/10.1029/2019JC015289 - Cheung, William W L; Watson, Reg; Pauly, Daniel (2013): Signature of ocean warming in global fisheries catch. Nature, 497(7449), 365-368, https://doi.org/10.1038/nature12156 - Froese, R; Pauly, Daniel (2019): FishBase, version (02/2019). World Wide Web electronic publication, https://www.fishbase.org - Schwarzkopf, Franziska; Biastoch, Arne; Böning, Claus W; Chanut, Jérôme; Durgadoo, Jonathan V; Getzlaff, Klaus; Harlaß, Jan; Riek, Jan K; Roth, Christina; Scheinert, Markus; Schubert, R (2019): The INALT family – a set of high-resolution nests for the Agulhas Current system within global NEMO ocean/sea-ice configurations. Geoscientific Model Development, 12(7), 3329-3355, https://doi.org/10.5194/gmd-12-3329-2019.
Project(s): Integrated Assessment of Atlantic Marine Ecosystems in Space and Time (iAtlantic) (URI: http://www.iatlantic.eu/)
Funding: Horizon 2020 (H2020) (URI: https://ec.europa.eu/programmes/horizon2020/), grant/award no. 818123: Integrated Assessment of Atlantic Marine Ecosystems in Space and Time (URI: https://cordis.europa.eu/projects/818123)
Coverage: - MEDIAN LATITUDE: -27.500000 * MEDIAN LONGITUDE: -47.208300 * SOUTH-BOUND LATITUDE: -34.000000 * WEST-BOUND LONGITUDE: -53.583300 * NORTH-BOUND LATITUDE: -21.000000 * EAST-BOUND LONGITUDE: -40.833300 - DATE/TIME START: 2000-01-01T00:00:00 * DATE/TIME END: 2019-12-31T00:00:00
Event(s):
Brazilian_Demersal_Fisheries_Time_Series * LATITUDE START: -21.000000 * LONGITUDE START: -40.833300 * LATITUDE END: -34.000000 * LONGITUDE END: -53.583300 * DATE/TIME START: 2000-01-01T00:00:00 * DATE/TIME END: 2019-12-31T00:00:00 * ELEVATION START: 0.0 m * ELEVATION END: -500.0 m * LOCATION: Southwest Atlantic * METHOD/DEVICE: Fishing port survey * COMMENT: The sampling (fishing) area is defined by the Brazilian Meridional Margin, from 21°S to the southern border of Brazilian EEZ (34°S) and from the coastal areas down to 500 m depths.
Size: 3 datasets
TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION:
Filename Citation of child dataset Demersal_Fisheries_Catch_Time_Series_BMM.tab - Perez, José Angel Alvarez; Sant'Ana, Rodrigo (2022): Catch composition time series (2000-2019) for demersal species in the Brazilian Meridional Margin. https://doi.pangaea.de/10.1594/PANGAEA.946292;
Environmental_Oceanographic_Fisheries_Time_Series_BMM.tab - Perez, José Angel Alvarez; Sant'Ana, Rodrigo (2022): Environmental, oceanographic and fisheries strategy time series (2000-2019) for demersal species in the Brazilian Meridional Margin. https://doi.pangaea.de/10.1594/PANGAEA.946391
Thermal_Species_Affinities_BMM.tab - Perez, José Angel Alvarez; Sant'Ana, Rodrigo (2022): Thermal preference/affinity of demersal species caught in the Brazilian Meridional Margin in the period 2000-2019. https://doi.pangaea.de/10.1594/PANGAEA.946399
script_MTC_analysis_ver00.R - for the implementation of the linear models and time-lag linear models;
script_Multivariate_analysis_ver00.R - for the implementation of the multivariated analysis (TBI, Beta Diversity).
Important: Some analysis are based on permutation process, thus, some results could present small differences between new runs and those presented in the manuscript.
This work is licensed under a Creative
Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).
