CEFASd850b418-61a1-43dc-bf02-12f3fb82e4f3
English
dataset
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
pointOfContact
2020-06-02T13:45:32
MEDIN Discovery Metadata Standard
Version 2.3.7
urn:ogc:def:crs:EPSG::4030
OGP
2019 - 2019 Centre for Environment, Fisheries & Aquaculture Science (Cefas) CLiP South Africa Microplastics in biota 2019
2020-06-02
publication
CEFASd850b418-61a1-43dc-bf02-12f3fb82e4f3
http://www.cefas.co.uk/
This dataset contains 3 csv files. One file
(South_Africa_Biota_Microplastics.csv) reports the microplastic abundance in
biota samples (anchovies, redeye round herring and sardines) collected and
analysed in South Africa in 2019. The file contains data of the samples
weight, length and number of microplastic items found. Fish is ordered by
'stratum' (geographical reference, please see
South_Africa_Biota_Microplastics_Strata.doc). Fish of the same species in the
same stratum were also stored in bags and a blank was measured in the lab to
assess contamination while working with specimens from the same bag. Blank
values are also reported. in the file. The file also reports information for
each sample. Since fish populations were homogeneous in size and shape, body
weight and length were recorded for only 5 individuals per bag, and averaged
values are reported for all fish from that bag. Stomach weight was measured
individually for all specimens. For sardines in strata E and F the lengths and
weights of each fish were measured, allowing for further analysis on the
health effects of microplastics in sardines. The file
South_Africa_Biota_Microplastics_FishMeasurements.csv reports body weights and
length of the specimen actually measured in each bag. A third file
(South_Africa_Biota_Microplastics_FTIR.csv) contains the profiles of the
ATR-FT-IR spectrum analysis of plastic pieces found in the fish stomachs.,
plus two profiles of known plastic for quality check A README text file
contains the legend of the columns of the three csv files.
The pictures of the plastic particles analysed with ATR-FT-IR can be obtained
inquiring the data steward.
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
originator
Centre for Environment, Fisheries & Aquaculture Science
Data Manager
+44 (0)1502 562244
Cefas Lowestoft Laboratory
Pakefield Road
Lowestoft
Suffolk
NR33 0HT
UK
data.manager@cefas.co.uk
custodian
notPlanned
Delimited
Image
NDGO0005
Litter abundance and type
SeaDataNet P021 parameter discovery vocabulary
2011-03-25
revision
Human health and safety
GEMET - INSPIRE themes, version 1.0
2008-06-01
publication
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
otherRestrictions
Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply
English
health
SeaVoX Vertical Co-ordinate Coverages
2010-05-18
revision
Unknown
10
40
-40
-20
2019-06-04T23:00:00.000Z
2019-07-04T23:00:00.000Z
http://data.cefas.co.uk/#/View/20476/order
dataset
The Commonwealth Litter Project (CLiP) supported Belize to take action on
plastics entering the oceans. The assessment of microplastics in biota was
part of the action plan to define scientific baselines for future monitoring
purposes and comparison. Samples of anchovies (Engraulis encrasicolus, 178
specimens), redeye round herring (Etrumeus whiteheadi, 188 specimens) and
sardines (Sardinops sagax, 227 specimens) were collected during the 36th
Pelagic recruit survey in 2019 carried out on board of the R.S. Africana by
the South African Department of Agriculture, Forestry and Fisheries (DAFF).
Samples were fished in an inshore area along the SA coastline limited by the
Orange River mouth (West Coast) and George (South Coast) and divided in seven
areas (strata). In the lab, stomachs were removed, rinsed and chemically
digested by a 30 percent KOH:NaClO solution with an incubation period of 24
hours at 40 degrees centigrade. All samples were then filtered, stained with
Red Nile dye and a digital image was acquired through a microscope. Number of
particles was counted and corrected for particles count in blank samples.
Visible particles were analysed using ATR-FT-IR to identify polymer
composition, comparing their spectrum to a polymers library. ATR-FT-IR is the
attenuated total reflection Fourier Transform infrared spectroscopy. A Thermo
Fisher Scientific Nicolet iS5 ATR-FTIR with an OMNIC software (version
9.9.473) was used and polymers were identified based on the percentage match
of IR spectra to a polymer library. Only spectra matched greater than 70
percent were accepted. Spectra were collected in the range 4000 – 650 1/cm at
a resolution of 4 1/cm.