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  Interpolated density distribution of commercial trawl tracklines in Tasman Bay-Golden Bay

Commercial trawl fishing data were provided by Ministry for Primary Industries to determine where fishing effort had taken place. Data were from Trawl Catch Effort Returns (TCER) and Trawl Catch Effort and Processing Returns (TCEPR) and included effort for flatfish, barracouta, snapper, red cod, and red gurnard. Data cover the time period 1 October 2008 to 16 November 2011. Where trawl data had only start tow positions (TCER data), trawl lines were generated on groomed data by plotting lines between consecutive trawl start positions, per vessel, per day (data excludes single trawls that fell on the same day). The Line Density Tool in ARCInfo vers. 10.0 was used to interpolate trawl tracklines giving each line a weight based on the estimated area towed. A geoTIFF shows the distribution of the density of trawl tracks.
 
Citation proposal
. . https://dc.niwa.co.nz:/niwa_dc/srv/api/records/f9ad47af-c8f1-4ba5-aa1c-90305aa4ccf7
 

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Credit
This work was funded by the Ministry for Primary Industries (MPI). 

  Point of contact

National Institute of Water & Atmospheric Research Ltd.  
217 Akersten Street Port Nelson
Nelson
7010
New Zealand
Spatial representation type
Grid  
Topic category
  • Oceans
N
S
E
W


  • Tasman Bay Golden Bay estimate trawl effort tracklines density GIS interpolation
Specific usage
TBGB 
Title
Tuck I, Hewitt J, Handley S, Willis T, Carter, M.; Hadfield, M.; Gorman, R.; Cairney, D.; Brown, S.; Palmer, A. (2011). Assessing the effects of fishing on soft sediment habitat, fauna and processes. Progress report prepared for MPI in part completion of project BEN2007-01. 
Association Type
Larger work citation  
Language
English  
Character encoding
UTF8  
OnLine resource

Point of truth URL of this metadata record

OnLine resource

Link to geoTIFF showing the interpolated distribution of estimated trawl tracks in Tasman Bay-Golden Bay

mdb:MD_Metadata

Metadata identifier
f9ad47af-c8f1-4ba5-aa1c-90305aa4ccf7

  Custodian

National Institute of Water & Atmospheric Research Ltd.  
Date info ( Creation )
2013-08-12T16:41:30
Title
ISO 19115-3 
 
 

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