Topic

 

oceans

263 record(s)

 

Type of resources

Topics

Keywords

Contact for the resource

Provided by

Years

Formats

Representation types

Update frequencies

Status

Scale

From 1 - 10 / 263

  • Physical, chemical and biological monitoring of water quality in estuaries within the Northland region for Northland Regional Council. Sampling sites are currently located in the Whangarei Harbour (WH), Bay of Islands (BOI) and Kaipara Harbour (KH), past data includes Hokianaga and Whangaroa Harours. Sampling frequency = 2monthly + 3 event driven sampling each year following heavy rainfall (WH, BOI), monthly (KH). Sampling began in 1986 (WH, BOI) and 2009 (KH) and is ongoing. Number of sites = 41 total currently. Since the start of the programme some sites have been dropped and some new sites have been added. Number of replicates = 1 per site. Measured variables = Water quality: salinity, DO%, DOmg/l, temp (YSI meter), Enterococci, faecal coliforms (Internal lab), TP, DRP, NNN, NH4, Turbidity (External lab), secchi, water depth (recorded in field). Sampling protocol & QA = Internal field monitoring manual and QA procedures. Water samples taken from top 0.5m of water column and sampling conducted at random tidal states, giving a more representative picture of water quality over time (WH, BIO) or high water (KH).

  • Located in the Waikato Conservancy, this marine reserve was established in 1992. An initial baseline habitat survey was completed. Monitoring at this reserve targets subtidal reef benthic communities and key species (abundance and population size structure of mobile invertebrates, sessile invertebrates, algal communities and other selected key species (e.g. paua, kina) occurring on rocky reefs, boulder reefs, biogenic reefs); subtidal fish species associated with rocky reefs, boulder reefs, biogenic reefs; and targeted rock lobster monitoring surveys. Sampling frequency = irregular. Depths sampled: 0-20 m Methods used to collect data:UVC, BUV, photograph, Pot

  • Categories    

    Database for recording the samples, typically of invertebrate bycatch, including corals, but also fish, received from the Ministry for Primary Industries (MPI), formerly the Ministry of Fisheries, observers on commercial fishing vessels.

  • GeoTIFF of an interpolated surface to represent sediment and shell data. Spatial reference: GCS_WGS_1984

  • The Graveyard seamount complex on the northern flanks of the Chatham Rise has several seamounts that have been managed as part of the seamount closures in 2001. The depths at which these seamounts exist are: 750-1250 m for peaks, and 1050-1600 m for seamount base. As part of this management, a directed survey was undertaken to map the distribution of fauna between seamounts with various levels of fishing effort. Images taken using NIWAs Deep Towed Imaging System (DTIS) provided the main data source. Surveys have been conducted on 3 occasions to collect image data of the benthic fauna/habitats to monitor changes over time: • seamounts open to fishing; • two unfished seamounts, now closed; and • one previously fished, now closed. This "natural experimental area" allows an evaluation of whether impacted habitat can recover over time following cessation of fishing, and the form the recovery may take. Measured variables: benthic mega epifauna Epibenthic sled: cod-end mesh size 25mm. Year of sampling: seafloor imagery with seamounts camera in 2001; NIWAs Deep Towed Image System (DTIS) in 2006 and 2009. Sampling frequency: 4 seamounts were sampled each survey, with up to 7 in 2006. The following seamounts were sampled each survey: Graveyard, Morgue, Gothic, and Diabolical. Temporal resolution of individual samples: continuous video, still images every 1 minute (2001), 30 secs (2006), 15 secs (2009). Sampling locations: at least 4 complete video transects on each seamount, with up to 8 transects on Morgue. Each transect was from the summit to the base of the seamount. Repear transects were made. Number of records: 2001 survey, 220 images; 2006 survey, 5097 images; 2009 survey, 8164 images. Still images generally showed 6-8 sq.m of seafloor. Other sampling method: epibenthic sled Positional accuracy: depth, latitude,and longitude are measured by a device (HPR) attached to the camera system deployed from NIWAs research vessel Tangaroa. Minimum size recorded: smallest megafauna 2-3 cm. Sampling protocols and quality assurance was imposed on the methods. There were checks between recorders and one person examined all the images. Data analysis: ongoing for a full comparison of the three surveys. Completed reports describing the surveys are listed above.

  • GeoTIFF of interpolated scallop, oyster, and mussel densities within Tasman Bay-Golden Bay

  • Located in the Southland Conservancy, this marine reserve was established in 1995. An initial baseline habitat survey was completed. Monitoring at this reserve targets subtidal reef benthic communities and key species (abundance and population size structure of mobile invertebrates, sessile invertebrates, algal communities and other selected key species (e.g. paua, kina) occurring on rocky reefs, boulder reefs, biogenic reefs); subtidal fish species associated with rocky reefs, boulder reefs, biogenic reefs; and targeted subtidal rock lobster monitoring surveys. Sampling frequency = irregular. Depths sampled: 0-100 m. Methods used to collect data:UVC, BUV, photograph, pot

  • Located in the Nelson-Marlborough Conservancy, this marine reserve was established in 1993. An initial baseline habitat survey was completed. Monitoring at this reserve targets subtidal reef benthic communities and key species (abundance and population size structure of mobile invertebrates, sessile invertebrates, algal communities and other selected key species (e.g. paua, kina) occurring on rocky reefs, boulder reefs, biogenic reefs); subtidal fish species associated with rocky reefs, boulder reefs, biogenic reefs; and targeted subtidal rock lobster and blue cod monitoring surveys. Habitat surveys were conducted after the initial baseline survey. Sampling frequency = irregular. Depths sampled: 0-50 m.

  • Commercial arrow squid fishery database contains a discrete time series (1989-1994) copy of commercial catch effort data (all methods) from the New Zealand arrow squid fishery. This database is used to calculate biological reference points such as Maximum Sustainable Yield (MSY) in terms of Current Annual Yield (CAY) and Stock assessment. Fishing methods used: trawl and jigging Sampling frequency: variable. Database records started in 1989 and continue to 1994. Number of sites: variable. Extent of site: entire EEZ, but most records from Tasman Bay. Lat/Long provided for all data. Number of replicates: N/A. Measured variables: Commercial squid fishery catch and effort data, for both commercial species (Nototodarus gouldi & N. sloanii). Data include sea temperature, depth, location, fishing method, fishing vessel, date, catch weight, species, trawl speed, trawl time, location. Sampling protocol & QA: Commercial Arrow squid fishery catch and effort data.

  • Water quality monitoring of harbours and coastal waters within the Auckland region for Auckland Regional Council. Sampling frequency = monthly. Sampling began in 1986 (not at all sites) and is ongoing. Number of sites = 36 total: East Coast (x9), Kaipara Harbour (x7), Manukau Harbour (x7), Waitemata Harbour (x11), Tamaki Estuary (x2). Number of replicates = 1. Measured variables = Salinity, conductivity, DO%, DOmg/l, temp, PH (YSI meter), Enterococci, TP, DRP, TKN, NNN, TN, NO3, NO2, chlorophyll a, chloride, turbidity, suspended solids, ammoniacal nitrogen and total oxidisable inorganic nitrogen (external lab). Water samples taken from top 0.5m of water column on the falling tide, just after high water. Sampling protocol & QA = Internal sampling protocol, samples are collected by helicopter or boat.