Weipa Juvenile Prawn Data 1981-1982

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Sampling of juvenile prawns took place between 1981-1982. These samples were mainly taken from the Embley River and Albatross Bay region. Samples were collected using beam trawls, plankton nets and set nets. Data recorded include species and length frequency.

Groote Eylandt Juvenile Prawn Data 1983-1989

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Seagrass aerial surveys were used to produce maps of the Groote Eylandt area. Samples of juvenile and sub-adult prawns were taken by beam trawl at Groote Eylandt, Blue Mud Bay and Sir Edward Pellew Islands under various sampling regimes between 1983 and 1989.

Tropical Prawn Project Prawn Trawl Data c1975-1979 (Redfield Data)

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Prawn trawl data from Weipa, East and South East Gulf of Carpentaria in the late 1970s. The main objective was to ascertain the distribution and abundance of each of the main commercial and some non-commercial penaeid species. The main data collection was performed off the Judy B with cruises repeated every month for 13 months; some other vessels were involved at different times (Kalinda, Raptis Pearl, Sprightly). Trawling was conducted at night and consisting of 30 minute shots. All prawns were sorted by species (general codes used) and sex, but no weights were recorded. Catch rates were expressed as number of prawns caught per net per hour. There were more than four sampling plans.

Embley River Prawn Predation Data 1993-1994

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Sampling was carried out in October 1993 and March 1994 to collect fish and juvenile prawns. Fish gut contents were examined. Sampling took place at two sites in the Embley River using gillnets, beach seines, rotenone, and beam trawls.

Albatross Bay Adult Prawn Data 1986-1992

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Adult prawn species, size, sex, reproductive stage, moult stage, and parasites were measured at 20 stations in Albatross Bay, Gulf of Carpentaria. Sampling was carried out monthly, around the new moon period, between March 1986 and May 1992. The projects objectives were: - To carry out a trawl survey of prawn species distribution, size distribution, population density and reproductive status in the study area - To carry our sampling for larval prawns at selected stations. - To sample for phytoplankton species composition and chlorophyll a levels at selected stations.

CSIRO / Industry-trained crew catch sampling at sea of prawns in the Northern Prawn Fishery (NPF) 1988-1990

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This data was collected to obtain base information for prawn management advice. Data were collated by 6 nm grid squares species, sex and size distribution (carapace length) of prawns in the commercial catch 1988 - 1990 inclusive. Also collated were turtle distribution in catches in 1989. All samples were taken and processed by CSIRO trained commercial trawl boat crews and presumably all samples were taken from areas of high abundance at that time. The fishing times over this period were 15 April to 22 June and about 1 August to 30 November.

Embley River Enclosure Data 1993-1994

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Juvenile tiger prawns were collected by beam trawl in the Embley River, Gulf of Carpentaria in October 1993, March 1994 and October/November 1994. The following parameters were measured: prawn numbers, carapace length, species, seagrass, biomass, salinity, temperature and depth. Field experiments were carried out using enclosure nets.

Prawn Recolonisation Data, Gulf of Carpentaria 1984-1995

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Juvenile prawn samples were collected by beam trawl at a number of sites between the Vanderlin Islands and Rose River (Numbulwar), Gulf of Carpentaria, to investigate the recolonisation of sand and seagrass habitats following Cyclone Sandy.

Coastal Nursery - Juvenile Prawn Data, Weipa 1992-1995

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The distribution of juvenile penaeids and a variety of fish species within mangroves was determined using stake and fyke nets in the Embley River (Cape York).

Gulf of Carpentaria Adult Prawn Data 1995

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Adult grooved tiger prawns (Penaeus semisulcatus) were caught in prawn trawls during one transect of the Gulf of Carpentaria on the FRV Southern Surveyor. The catches were used to assess offshore migration of the species. Data collected include length frequency, sex and gonad stage. Data were collected using 39 paired Florida Flyer trawls centred on 6nm grids across approximately 13 sites. The sites are spaced some distance apart along the cruise track (a transect from Weipa to N Groote and back to Weipa). The AusTED and standard codend were compared in these trawls, and the same data were also to be used monitor the distribution of Penaeus semisulcatus across the Gulf. Problem shots were retrawled when possible to meet the experimental design. Nine were abandoned due to lack of time.