d1e1f094-c9b4-45b8-a3a2-85719bd30075 Data curator NIWA National Insititute of Water & Atmospheric Research curator@niwa.co.nz 2012-09-14T09:21:58 ISO 19115:2003/19139 1.0 Trawl (trawl) The trawl database is the major fisheries research database. It results from data collected by research trawl surveys on research vessels and chartered commercial fishing vessels. This database is maintained by NIWA for MPI. Trawl surveys are a major tool used by research scientists for stock assessment. They are used to estimate basic parameters of commercial fish populations, including biomass, sex ratio, and the proportion of sexually mature fish, and the distribution of ages and lengths in the population. These parameters may be used in estimating mortality and growth rates. Sampling frequency: variable. Database records start in 1960 and continue to present. Number of sites: variable. Extent of site: entire EEZ and beyond. Lat/Long provided for all data. Number of replicates: N/A. Measured variables: Data include sea temperature, depth, location, fishing vessel, date, catch weight, species, trawl speed, trawl time, weight of each fish species caught, and length, sex and age data for selected species. Sampling protocol & QA: inshore and deepwater research trawl surveys conducted in New Zealand waters. In addition to the trawl information other information collected during trawl surveys are also included in the database e.g. camera deployments, CTD probes, plankton, physical measurements, blue cod potting. Depth range: 2 to 3500 m. Research Data Manager Ministry for Primary Industries +64 4 894 0100 or 0800 00 83 33 +64 4 894 0720 Pastoral House, 25 The Terrace Wellington 6011 New Zealand rdm@mpi.govt.nz ocean coastal water column ecological physical seamount trawl ctd video MEMP In 2001, the Ministry of Fisheries acquired Soviet trawl survey data from the New Zealand region collected from 52 trawl surveys covering the period from 1964 to 1987. Nothing is known about the sampling strategy employed by the Soviets during these surveys. No stratum information was given, so they are assumed to be non-stratified. These data are of dubious quality and were collected to unknown standards, and hence are held separate from all other trawl survey data. To access data permission is required from rdm@mpi.govt.nz. eng oceans New Zealand 200 n. mile EEZ and the Ross Sea in Antarctica. 160.00 -172.00 -76.83 -26.00 1960-02-23T00:34:00 https://dc.niwa.co.nz/niwa_dc/srv/metadata/d1e1f094-c9b4-45b8-a3a2-85719bd30075 WWW:LINK-1.0-http--metadata-URL Point of truth URL of this metadata record http://www.fish.govt.nz/en-nz/Research+Services/Research+Database+Documentation/default.htm WWW:LINK-1.0-http--downloaddata Link to MPI website where metadata and other infromation are available.