This data set contains Simrad EK500 single beam echosounder data at 38 and 120 kHz and Simrad EA500 single beam echosounder data at 12 kHz from the Southern Surveyor. The EK500 data is primarily for water column characterisation (fish stocks, microplankton distribution) and on occasions for seabed classification (particularly prior to the EM300 swath mapper being installed), while the EA500 data is primarily for bathymetric readings.
This dataset contains the Underway (UWY) data collected on Southern Surveyor voyage SS 01/97. This cruise took place in southern Tasmanian Continental Slope waters during 20 January - 1 February 1997, under the leadership of Tony Koslow. This dataset has NOT been processed and is archived within the CSIRO Marine and Atmospheric Research Data Centre in Hobart. Additional information regarding this dataset is contained in the cruise report for this voyage. The standard Underway (=continuously recorded) dataset from a research voyage includes Navigation (NAV), Sounder, Thermosalinograph (TSG) and Meteorological (MET) data. NAV data includes GPS (Global Positioning System) measurements of latitude, longitude, ship's direction and speed. MET data includes atmospheric temperature, humidity and pressure, wind speed and direction, and incident radiation intensity. Data are recorded at or averaged over 1 minute intervals.
This record describes the longline and trap data collected as part of the Tasmanian Seamounts Study undertaken by CSIRO Division of Fisheries in January 1997. Droplines and traps were deployed for between 2 and 7 hours at four seamounts to sample the motile fauna (fish, crustaceans, etc.) living within the benthic environment. 8 fish species were collected by these methods, the most numerous being squalid sharks (Etmopterus spp.) and eels (Diastobranchus capensis, Simenchelys parasiticus). The data from these fishing methods has been added to that from the dredge surveys in the faunal sections of the report of this survey.
This record describes the benthic assemblage survey data collected as part of the Tasmanian Seamounts Study undertaken by CSIRO Division of Fisheries in January 1997. 34 benthic dredge tows were made on the top, slope and base of 14 seamounts in the survey area, approx. 100 km to the south of Tasmania, using a specially constructed dredge, in water depths ranging from 600m to approx. 2000m. Numerous (>200) invertebrate taxa were recovered representing hydroids, octocorals, polychaetes, bryozoa, bivalve molluscs, cephalopods, barnacles, isopods, decapod crustaceans, crinoids, asteroids, echiuroids, holothurians, hydrozoans, brachiopods, chitons, gastropods, sponges, and other minor groups. The data have been analysed with respect to depth, fishing history (lightly or heavily fished areas), and position on the seamount, and two main community types documented, one dominated by living colonial coral (Solenosmilia variabilis) and one by echinoids (sea urchins). Many of the species found are new records for Australia and a number are new to science. The specimens of select taxa from this survey were re-examined to enable comparison of this survey to two surveys conducted in in the same area in 2006/7 (SS11/2006 & SS02/2007). Identification were upgraded and specimens compared to the new collections by museum experts and integrated into the data. To date (Sept. 2014) we are aware of 20 taxonomic revisions or descriptions that have been published using material from this collection.
This record describes the photographic transect survey data collected as part of the Tasmanian Seamounts Study undertaken by CSIRO Division of Fisheries in January 1997. Ten photographic transects were made from the base to pinnacle of 4 out of 14 seamounts in the survey area, approx. 100 km to the south of Tasmania, using a Photosea 2000 stereoscopic deepsea camera system, in water depths ranging from 2180 m to 714 m. The transects were typically oriented N-S and E-W on each seamount, with 2 transects replicated. Between 67 and 150 photos were taken per transect, at a mean range between photos of 27 m, at heights of 1 to 4 m off the bottom. The photographs were later assessed for percent cover by a range of bottom types, and for numbers of recognisable organisms of particular types. In 2008/09 the slide images were scanned and re-assessed for fauna and sediment types for comparison with image data collected on voyages SS11 / 2006 and SS2/2007. The image annotations collected for this project have been added to the Oracle data base BHIMAGE and the associated videos and still images have been archived as described in MarLIN record 14436 'Benthic Habitats Video Image Archive'.
This record is an overview entry for biological data collected on Southern Surveyor cruise SS 01/97. This cruise took place in southern Tasmanian Continental Slope waters during 20 January - 1 February 1997, under the leadership of Tony Koslow. Biological data collected on this cruise include photographic surveys of four seamounts, dredge samples, faunal samples (including corals and many other benthic invertebrates) and fish samples. Samples of several species of corals, including Solenosmilia variabilis, were also taken for genetic analysis, and rock samples taken for age determination of the seamounts.