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Coastal Waters (Australia) | Tasmania Coast East and Southeast, TAS
532 record(s)
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The standard method for growing the early stages of juvenile Pacific oysters (Crassostrea gigas)is to hold them in systems called upwellers in land-based nurseries, with seawater being pumped through to provide the oysters with food particles. Growth rates of oysters cultured using this method were highly variable at Pipe Clay Lagoon, a major oyster nursery in Tasmania (Australia). Growth rates in 1996-1997 were less than one-third of the previous five seasons and significantly less than at another nursery. Trials were conducted at Pipe Clay Lagoon to assess whether oysters' growth rates could be improved by supplementing their natural diet with additional feed sources, including cultured microalgae, dried or concentrated microalgae and a yeast-based artificial diet. Across all trials, supplementary feeding (on average) increased the oysters' growth rate by 60%. Supplementary feeding was most effective when natural levels of food, especially microalgae, in the inflowing seawater were low. This data set includes inorganic nutrients, particulate matter and dissolved organic carbon, chlorophyll a, salinity, rainfall, temperature, fatty acid concentrations and composition, pigment concentrations and nutrient parameters and oyster growth rates at Pipe Clay Lagoon.
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These wind statistics data are collected continuously at the Tasmanian Earth Resources Satellite Station (TERSS) facility on Droughty Hill near Hobart on Tasmania's south east coast. Data collection began in September 1995 and continued to Dec 2011. Instrument Details: Location: latitude -42.9256, longitude 147.4206, ground elevation 150m, instrument 7 metres above ground. Manufacturer: R.M. Young Company. Traverse City, Michigan 49686 U.S.A. 616-946-3980 (http://www.youngusa.com) Model: Wind Monitor, model 05103V (See link to brochure). Data: Each line of data gives values reduced from samples collected every second over the preceding 10 minutes. Parameters include: Date; Time (UTC); Mean wind speed; Minimum wind speed; Maximum wind speed; Mean direction; Standard deviation of the previous 10 1-minute direction averages; Vector averaged wind speed; Vector averaged wind direction; Vector averaged "stress" in (m/s)**2; Vector averaged stress direction. The code that takes the one second readings and produces the 10 minute averages in the data files is available via the documentation links section). NOTE: This data is collected in order to assist in the daily management of the satellite dish. The instrument is located at a site to suit this particular purpose, not at a location that would provide the best statistics for other purposes.
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Exploratory survey of Orange Roughy by the FV San Rankino south of Tasmania in 1992. This ship fished for Orange Roughy to support Southern Surveyor SS9201. The data includes station logs and catch composition.
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This record contains fisheries statistics, History of Marine Animal Populations, trawling, overfishing from the Australian fishing industry between 1937 and 1943.
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Exploratory survey of Orange Roughy by the FV Belinda south of Tasmania in 1992. This ship fished for Orange Roughy to support Southern Surveyor SS9201. The data includes station logs and catch composition.
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Exploratory survey of Orange Roughy by the FV Corvina south of Tasmania in 1992. This ship fished for Orange Roughy to support Southern Surveyor SS9201. The data includes station logs and catch composition.
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Exploratory survey of Orange Roughy by the FV Teena B south of Tasmania in 1992. This ship fished for Orange Roughy to support Southern Surveyor SS9201. The data includes station logs and catch composition.
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These data, reported in various volumes of CSIRO's "Oceanographic Station List" series between 1957 and 1962, comprise mainly measurements of surface temperature, salinity (as chlorinity), and (in later stages) phosphate from sea surface samples collected by merchant ships in Bass Strait and surrounding waters. Vessels contributing t the sampling program include TSS "Taroona" and "Princess of Tasmania, SS "Talune", and MVs "Claire Crouch", "Denman", Century", "Jillian Crouch", "Lorinna", "Marra", "Pateena", "Poolta", "Risdon", and "Wareatea". Sampling began in December 1954 and was still in progress December 1960, the last date for which data were published in this series. The merchant vessel sampling program was carried out at a time when the CSIRO Division of Fisheries had no dedicated ocean-going research vessel, as a means of acquiring information about offshore waters. In the volumes cited, similar data are also reported from the Coral Sea, Tasman Sea, and the south-east Indian Ocean.
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Dive surveys were conducted in 2015 and 2016 to establish a baseline and monitor the status of the critically endangered spotted handfish (Brachionichthys hirsutus) population. This dataset contains track records of variable length, GPS tracked underwater visual census transects conducted within 11 sites across the Derwent Estuary (n=9) and D'Entrecasteaux Channel (n=2). Records illustrated search effort (transect length, swathed area) and total fish sighted along each transect. Data were also presented in a standardised unit, with density estimates (fish per hectare [Ha]) extrapolated for each transect. In addition, this dataset also included information for each sighting of individual fish. This dataset contains size measurement (total length) and location (depth, latitude, longitude) records for each sighted fish.
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This record describes magnetometer data collected on RV Investigator voyage voyage IN2020_E01 (Trials and Calibration) which departed Hobart on the 29th July 2020 and returned to Hobart on the 6th August 2020. The purpose of this voyage was to undertake post port-period equipment calibrations and commissioning, sea trials and personnel training. The SeaSPY2 magnetometer uses an omnidirectional Overhauser sensor that requires no realignment or recalibration and has no heading error. The instrument has an absolute accuracy of 0.1 nT, sensor sensitivity of 0.01 nT and resolution of 0.001 nT. Data are stored in .CSV and .MMS data files at CSIRO. 0.68 MB of raw data was acquired in this dataset. No processing has been conducted on this data. The magnetometer was towed 300 m astern of the ship and a layback value of 361 m was applied to the magnetometer data. This was the total distance behind the ship's positioning reference point. Note: The magnetometer was only deployed for a short period (between 23:04 & 23:51 on the 03/08/2020 - UTC) for training purposes only. Additional information regarding this dataset is contained in the GSM data acquisition and processing report.