Between 1991-1997 a study of school and gummy shark nursery areas in Tasmania, lead by John Stevens, resulted in 404 school shark and 1254 gummy shark being tagged. Up to 1997, 50 school shark and 160 gummy shark had been recaptured. Small numbers of other shark species were also tagged.
Between 1947 and 1956 a study lead by Mick Olsen resulted in 6502 school and 587 gummy sharks being tagged in south-east Australia. Most of the school shark were tagged in inshore bays and estuaries, notably Port Phillip Bay, Port Sorell, Georges Bay and Pittwater. Most of the gummy shark were tagged in inshore areas around Flinders Island and the north coast of Tasmania. A total of 594 school shark and 60 gummy shark were recaptured. This data set includes field sheets and the tags returned to CSIRO. These records are cataloged in the TRIM Records database, as follows: AB2008/1038: CMAR - School and Gummy Shark Tagging by CSIRO in Southern Australia 1947-1956 - Mick Olsen and Grant West - MarLIN record 8218 This Archive Box number incorporates 2 containers: "C2008/6921-01: CMAR - School and Gummy Shark Tagging by CSIRO in Southern Australia 1947-1956 - Mick Olsen and Grant West - MarLIN record 8218 - Part 1 - Tag Data Field Sheets" [associated files lodged within as separate objects]; and "C2008/6921-02: CMAR - School and Gummy Shark Tagging by CSIRO in Southern Australia 1947-1956 - Mick Olsen and Grant West - MarLIN record 8218 - Part 2 - Tags and Olsen Card Index [in metal filing cabinet]"
46 school shark were tagged with archival tags during 1997-98, in South Australian and Tasmanian waters. 19 tags were recovered. The tags yielded 15.3 years of data on light level, depth and temperature collected at 4 minute intervals. The basic release-recapture data has been entered into the CSIRO pelagic tag data base but not the actual electronic data. The electronic data for the Lotek tags is in a different format to that of the Wildlife Computer tags, and may require dedicated geolocation software to process. Wildlife Computers provides geolocation software for their tags free of charge. While longitudinal movements have been described, there was no analysis of corresponding latitudes, as light-based latitude estimation was unreliable. There is scope for additional research into latitudinal movements based on the depth data. The depth pattern shown by the sharks can be used to examine if the fish was close to the bottom, and combined with a longitude estimate for a particular day, latitude can be estimated as across much of southern Australia where depth increases with latitude. However, there is a software development challenge associated with this, as there may be more than one depth fit for a particular longitude, especially towards eastern Australia. In this eastern region the restricted depth of Bass Strait can provide additional information on the latitude, as fish data at >86m indicates that it was too deep for Bass Strait. An additional factor that was not examined was the temperature data from the tags. In pelagic species surface water temperature is used to estimate latitude and at times school shark do come close to the surface. Some of the tags were set up to record internal as well as external temperatures but this data was not examined. There have been 2 recaptures of Wildlife Computers tags since West & Stevens (1996) published the results. There have also been two Lotek tags returned since this publication but the data for these tags was corrupted.
Southern blue fin tuna have been released since 1959 using conventional tags. This is where the tag database has its origins and therefore a large amount of the data held in the database consists of conventional (dart) tags releases of this species in Australian waters. In recent times the data base has evolved to include many more species of pelagic and benthic fish, sharks and turtles. The advent of electronic tags, some with satellite and/or acoustic tracking ability has added to the complexity of the database. Not only do these electronic tags require additional fields for setup options before release, but also require tables to support the complex range of data retrieved from these tags. The data has been grouped into a number of projects. The purposes behind each such project are many and range from the collection of data required for population analyses (the estimation of mortality rates and growth rates), to the investigation of large and fine scale movements, feeding patterns as revealed by the use of ‘smart tags’. Also for many tagging programs there have been changes in tagging ability between skilled and novice taggers. Individual projects thus reflect these criteria so that each Marlin entry contains as nearly as possible a homogenous data set in terms of: 1. Species 2. Tag type 3. Taggers used, in particular the use of CSIRO or non CSIRO personnel 4. Period of coverage to ensure that particular variants of tag type were used 5. Specific project aims 6. Specific geographical area 7. Lead agency ( to ensure that appropriate permission is obtained before access to the data base is permitted) Thus all the species specific data contained in the CSIRO data base has been grouped into discrete Marlin metadata units. Tag data for a particular species may also be covered by multiple Marlin units. The CSIRO database manager has a full listing of the species numbers contained in all Marlin units. Species where more than 200 individuals have been tagged in individual or multiple projects are listed in the descriptive keyword section. Keywords: Tag, Conventional, Archival, Acoustic, Pop-Up, Satellite, Tuna, Swordfish, Shark, Pelagic Fish, Demersal Fish, Turtles.
This record is an overview entry for biological data collected on Soela cruise SO 3/80. This cruise took place in the Great Australian Bight during 26 April - 18 May 1980, under the leadership of John Stevens. Biological data collected on this cruise include EK 50 acoustic data of pelagic fish abundance. Phytoplankton filtered samples for later chlorophyll-a extraction. Fish eggs and larvae from the plankton samples. Numerous larval and juvenile cephalopods. Pilchard (27 kg) samples, the otoliths, scales and stomach contents of pilchards were retained. In the diel feeding study, Pterygotrigla polyommata occurred in every shot and preliminary results showed that 87% of this species caught in the post dawn trawl had food in their stomachs compared with 25-30% at other times.(derived from the cruise report) - Biological Field Data Sheets recorded during this voyage have been scanned to PDF, and are available (to CSIRO Staff) on-line. See the details link under "Stored Media List" (below).
This record describes the datasets obtained on Courageous Cruise 010. The data were obtained from South Australian, Victorian and Bass Strait waters in July 1976. Data were obtained from acoustic and trawl surveys of Jack mackerel (Trachurus declivis) and other demersal and pelagic fish, including Gemfish (Rexea solandri), Macruronus novaezelandiae, deep water flathead, ling, jackass fish and several species of sharks including school shark, gummy shark, ghost shark and green eye. Several tusk fish (Dannevigia tusca) were caught and retained for further study. A rare fish Neophrynichthys marcidus was also obtained from the deepest trawl (0470-0748 metres). Some XBT data were obtained on this cruise. Additional information regarding this dataset is contained in the cruise summary for this voyage.(derived from the cruise report) - Biological Field Data Sheets recorded during this voyage have been scanned to PDF, and are available (to CSIRO Staff) on-line. See the details link under "Stored Media List" (below).
This record describes the datasets from Courageous Cruise 005. The data were obtained from the east coast of Tasmania, Bass Strait and Victorian waters in January 1976. Acoustic and trawl surveys for jack mackerel (Trachurus declivis) and other demersal and pelagic fish species, including clupeoids. Other species recorded in trawls included snoek, anchovy, pilchard, mirror dory, hake, flathead, jackass fish, school shark, spur dogfish, silver dory, ling and gilled sharks. Additional information regarding this dataset is contained in the cruise summary for this voyage. (derived from the cruise report) - Biological Field Data Sheets recorded during this voyage have been scanned to PDF, and are available (to CSIRO Staff) on-line. See the details link under "Stored Media List" (below).