New Zealand fish and squid distributions from research bottom trawls 1964-2008
Citation
Mackay K (2018). New Zealand fish and squid distributions from research bottom trawls 1964-2008. Version 1.1. The National Institute of Water and Atmospheric Research (NIWA). Occurrence dataset https://doi.org/10.15468/ti5yah accessed via GBIF.org on 2019-01-17.Description
From 1997 to 2008, a research programme to determine if fish assemblages in the New Zealand region could be classified into clearly identifiable communities based on their associations with each other and with environmental features was undertaken. This dataset is taken from the resulting fish communities database. These data have been used to show geographical and depth distributions of species from all research tows within the New Zealand EEZ since 2008.Sampling Description
Study Extent
Fisheries research trawls since 1961 over the New Zealand EEZ area.Sampling
Most records are from random bottom trawls, but there are also records from midwater trawls, scampi trawls and non-random tows (such as gear trials and target tows).Quality Control
The scientific names have been mapped to the World Register of Marine Species (WoRMS), using the online taxon match tool. All sampling locations have been plotted on a map to perform a visual check. The most important check would be to see if all sampling locations are (1) in the marine and/or brackish environment and (2) within the described sampling area.Method steps
- Only successful trawl records were selected. All “foul” shots are excluded as the net may have ripped and some species may have escaped on hauling. All species identification have been validated and outliers based on geographic and depth distributions have been checked.
- -Catch weights (kg) are added to the “occurrenceRemarks” field. -Sea temperature recorded by trawl headline sensors are added to the “dynamicProperties” field.
Additional info
marine, harvested by iOBISTaxonomic Coverages
Geographic Coverages
New Zealand EEZ
Bibliographic Citations
- Anderson O.F., Bagley, N.W., Hurst, R.J., Francis, M.P., Clark, M.R., & McMillan, P.J. 1998: Atlas of New Zealand fish and squid distributions from research bottom trawls. NIWA Technical Report 42. 303 p. - Anderson et al. (1998)
Contacts
Kevin Mackayoriginator
position: Marine Data Manager
NIWA
Greta Point
Wellington
NZ
homepage: http://www.niwa.co.nz
Kevin Mackay
metadata author
position: Marine Data Manager
NIWA
Greta Point
Wellington
NZ
homepage: http://www.niwa.co.nz
Kevin Mackay
administrative point of contact
position: Marine Data Manager
NIWA
Greta Point
Wellington
NZ
homepage: http://www.niwa.co.nz