Brief description
Through reviewing available fisheries data sets, reports, logbooks and CAES (Catch And Effort Statistics) 3836 bycatch records were identified and are available as a comma-separated value (CSV) file. Bycatch is defined as discards only, and does not include by-product which is kept by fishers and sold. Within WAMSI Node 4.4.1 the following work was undertaken: i) Determine the cumulative effect of fisheries on bycatch species, including Threatened, Endangered and Protected species (TEPs), discarded undersize target species, and all other discarded species in the Gascoyne and the West Coast Bioregions; ii) Establish a risk analysis of interaction rates between the collective fisheries and bycatch to identify which species, species groups or fisheries require more detailed assessment; and iii) Identify better ways to quantify fishery - bycatch interactions and therefore increase our ability to understand the risks to particular species or groups within a range of fisheries.Lineage
Statement: Bycatch data were searched for in Fisheries databases, Fisheries library, university libraries, personal contact and the Internet. However, bycatch data was only found within Fisheries databases and reports. Of the 26 fisheries (commercial and recreational) identified in the West and Gascoyne Bioregions, data was present for only 10 fisheries. However the majority of this data is from relatively old studies and many changes, either gear or fishing effort, have occurred in the fisheries since then. For example, the Shark Bay data was collected without Bycatch Reduction Devices (BRDs) such as Turtle Exclusion Devices (TEDs), fish scarers or square mesh panels. TEDs are mandatory in the fishery now, so the data does not reflect the commercial catch of trawl fishers at present. Another example is the Temperate Demersal Gillnet and Demersal Longline Fishery (DGDLF). The study of this fishery was conducted between 1994 and 1999. However, the Department is working with operators to remove latent effort and restricting effort to 2001/02 levels, which were lower than the 94/99 levels, by transitioning to a more explicit hourly effort management system. Thus the catch should be less than seen in the data provided here.
Statement: Column headings in the .csv file containing 3836 records include:
- ProjectCode
- ProjectDescription
- SectionDescription
- TaskTypeDescription
- Year
- Comment
- UnitOfMeasureDescription
- CatchUnits
- SpeciesCode
- CommonName
- ScientificName
- FamilyName
- TaxaDescription
- RegionDescription
- FisheryDescription
Details are given in the parameters section.
Threatened, Endangered and Protected species (TEPs) were included in this database if the data was collected in the studies reported here. TEPs data from daily log books and CAES records will be included in a report in June 2010. The data has been saved a comma-delimited file from a database in Department of Fisheries (DoF) complete with the appropriate CAAB taxon codes. All data in the database is linked to DoF database codes except for the “Demersal gillnet fisheries” data. Due to the distributional nature of the fishery, this is a compilation of data from the South and West coast bioregions; specifically the data is from the Joint Authority Southern Demersal Gillnet and Demersal Longline Managed Fishery (JASDGDLF) and the West Coast Demersal Gillnet and Demersal Longline (Interim) Managed Fishery (WCDGDLF).
Created: 11 08 2009
text: westlimit=112; southlimit=-27; eastlimit=114.85; northlimit=-21.5
text: westlimit=113; southlimit=-34.5; eastlimit=116; northlimit=-27
Subjects
AGRICULTURAL AQUATIC SCIENCES |
AGRICULTURE |
ANIMALS/VERTEBRATES |
BIOLOGICAL CLASSIFICATION |
EARTH SCIENCE |
Fish |
Fisheries |
biota |
capture_rate |
collection_method |
fishery_name |
oceans |
project_code |
project_description |
sample_region |
section_description |
society |
task_description |
taxonomic_classification |
taxonomic_code |
taxonomic_common_name |
taxonomic_family_name |
taxonomic_group_count |
taxonomic_name |
year |
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Other Information
(WAMSI_Node_4.4.1_Bioregional_Bycatch_Database.csv)
Identifiers
- global : d69642a9-4870-4f5e-beda-55247d128d7a
