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Höpker, Sebastian N; Wu, Henry C; Lucassen, Friedrich; Brochier, Timothée; Sadio, Oumar; Nuworkpor, Ishmael Y; Kasemann, Simone A; Merschel, Peter; Westphal, Hildegard (2022): 87Sr/86Sr and Sr/Ca measured in the otoliths of catfish (Carlarius parkii and Chrysichthys nigrodigitatus) caught in the estuaries of the Gambia River, Sine-Saloum, and Volta River, 2017 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.940805

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Abstract:
Modern sub-surface water samples and the otoliths of catfish (Carlarius parkii and Chrysichthys nigrodigitatus) collected from the estuaries of the Gambia River (The Gambia), Sine-Saloum (Senegal), and Volta River (Ghana) in 2017 were analysed to investigate relationships between the Sr geochemistry and salinity. 87Sr/86Sr, Sr concentration, and salinity measured in water samples collected along the estuarine salinity gradients were used to establish mixing models describing their relationships. Bulk catfish otolith 87Sr/86Sr measurements were used to estimate habitat salinity of the fish based on these mixing models. Catch data (total length, fork length, weight) of catfish were recorded and used to estimate their age. Fish ages were further estimated based on otolith annuli.
Keyword(s):
87Sr/86Sr; Carbonate; Catfish; Hydrochemistry; Otolith; Salinity; Strontium; West Africa
Related to:
Höpker, Sebastian N; Wu, Henry C; Lucassen, Friedrich; Brochier, Timothée; Sadio, Oumar; Nuworkpor, Ishmael Y; Kasemann, Simone A; Merschel, Peter; Westphal, Hildegard (2022): 87Sr/86Sr, Sr and Ca concentration, and salinity of water samples from the estuaries of the Gambia River, Sine-Saloum, and Volta River, 2017. PANGAEA, https://doi.org/10.1594/PANGAEA.940804
Höpker, Sebastian N; Wu, Henry C; Lucassen, Friedrich; Sadio, Oumar; Brochier, Timothée; Nuworkpor, Ishmael Y; Kasemann, Simone A; Merschel, Peter; Westphal, Hildegard (2022): Sr Isotope Ratios (87Sr/86Sr) in Water and Fish Otoliths as Estuarine Salinity Tracers: Case Studies from Three NW African Rivers. Estuaries and Coasts, https://doi.org/10.1007/s12237-021-01041-x
Project(s):
Leibniz Centre for Tropical Marine Research (ZMT)
Coverage:
Median Latitude: 11.024172 * Median Longitude: -10.816678 * South-bound Latitude: 5.824850 * West-bound Longitude: -16.581233 * North-bound Latitude: 13.752333 * East-bound Longitude: 0.622383
Event(s):
Gambia_River_RAP-GR-1  * Latitude: 13.495333 * Longitude: -16.581233 * Location: Gambia River estuary, Africa * Method/Device: Water sample (WS) * Comment: Sampling campaign: April 2017
Gambia_River_RAP-GR-2  * Latitude: 13.495333 * Longitude: -16.581233 * Location: Gambia River estuary, Africa * Method/Device: Water sample (WS) * Comment: Sampling campaign: April 2017
Gambia_River_RAP-GR-3  * Latitude: 13.495333 * Longitude: -16.581233 * Location: Gambia River estuary, Africa * Method/Device: Water sample (WS) * Comment: Sampling campaign: April 2017
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventHöpker, Sebastian N
2 LATITUDELatitudeHöpker, Sebastian NGeocode
3 LONGITUDELongitudeHöpker, Sebastian NGeocode
4 LocationLocationHöpker, Sebastian N
5 SpeciesSpeciesHöpker, Sebastian N
6 Sample IDSample IDHöpker, Sebastian N
7 Length, totalTLmmHöpker, Sebastian NTotal (longest) length of individual
8 Fish, fork lengthFish f lmmHöpker, Sebastian N
9 Weight, total, wetw tot wetgHöpker, Sebastian NTotal weight of individual
10 AgeAgeaHöpker, Sebastian NOtolith-based. Age estimate based on annuli counting
11 AgeAgeaHöpker, Sebastian NSize-based. Age estimate based on fish size and Von Bertalanffy equation
12 Strontium/Calcium ratioSr/Cammol/molHöpker, Sebastian NInductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES)
13 Strontium/Calcium ratio, standard deviationSr/Ca std dev±Höpker, Sebastian NInductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES)
14 Strontium-87/Strontium-86 ratio87Sr/86SrHöpker, Sebastian NThermal Ionization Mass Spectrometry (TIMS)Dissolved, aqueous
15 Strontium-87/Strontium-86 ratio, error87Sr/86Sr e±Höpker, Sebastian NThermal Ionization Mass Spectrometry (TIMS)2 standard errors of the mean (2SE)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
93 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 
Event		2 
Latitude		3 
Longitude		4 
Location		5 
Species		6 
Sample ID		7 
TL [mm]
(Total (longest) length of ind...)		8 
Fish f l [mm]		9 
w tot wet [g]
(Total weight of individual)		10 
Age [a]
(Otolith-based. Age estimate b...)		11 
Age [a]
(Size-based. Age estimate base...)		12 
Sr/Ca [mmol/mol]
(Inductively Coupled Plasma - ...)		13 
Sr/Ca std dev [±]
(Inductively Coupled Plasma - ...)		14 
87Sr/86Sr
(Dissolved, aqueous, Thermal I...)		15 
87Sr/86Sr e [±]
(2 standard errors of the mean...)
Gambia_River_RAP-GR-1 13.495333-16.581233Gambia RiverCarlarius parkiiRAP-GR-13362823344.53.34.890.020.7092130.000007
Gambia_River_RAP-GR-2 13.495333-16.581233Gambia RiverCarlarius parkiiRAP-GR-23422863434.53.44.200.070.7092030.000005
Gambia_River_RAP-GR-3 13.495333-16.581233Gambia RiverCarlarius parkiiRAP-GR-33553034074.53.74.500.090.7092270.000008
Volta_River_RCN-1 5.8248500.622383Volta RiverChrysichthys nigrodigitatusRCN-13.170.020.7107500.000007
Volta_River_RCN-2 5.8248500.622383Volta RiverChrysichthys nigrodigitatusRCN-23.450.020.7118750.000009
Volta_River_RCN-3 5.8248500.622383Volta RiverChrysichthys nigrodigitatusRCN-33.090.030.7114460.000006
Sine-Saloum_RAP-SS-1 13.752333-16.491183Sine-SaloumCarlarius parkiiRAP-SS-14003536475.04.84.720.050.7091950.000005
Sine-Saloum_RAP-SS-2 13.752333-16.491183Sine-SaloumCarlarius parkiiRAP-SS-24083555735.54.84.710.050.7092020.000007
Sine-Saloum_RAP-SS-3 13.752333-16.491183Sine-SaloumCarlarius parkiiRAP-SS-33953425415.54.54.250.020.7091980.000007