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Environment
PROJECT NUMBER • 2013-025
PROJECT STATUS:
COMPLETED

Assessing post-release survival of Southern Bluefin Tuna from recreational fishing

Southern Bluefin Tuna (SBT) are an important component of the recreational game fishery in Australia. Recreational fishers in waters around South Australia, Victoria, Tasmania and New South Wales catch this species seasonally. Each state respectively is responsible for the management of this...
ORGANISATION:
University of Tasmania (UTAS)
Industry
PROJECT NUMBER • 2012-708
PROJECT STATUS:
COMPLETED

Seafood CRC: quantifying physiological and behavioural responses of cultured abalone to stress events

It is desirable for any primary producer to understand the health and welfare of their stock. This will ultimately enable optimal production and return on investment. The challenge in any aquaculture system is ‘observing’ the physiological and behavioural responses associated with environment,...
ORGANISATION:
University of Tasmania (UTAS)
Environment
PROJECT NUMBER • 1999-201
PROJECT STATUS:
COMPLETED

Aquafin CRC - Atlantic Salmon Aquaculture Subprogram: development of selective enrichment culture-polymerase chain reaction (SEC-PCR) for the detection of bacterial pathogens in covertly infected farmed salmonid fish

Bacterial disease is a major cause of stock loss in aquaculture. The severity of infection may range from acute to chronic through to benign. This latter condition, termed covert infection, is insidious, as fish may appear to be outwardly healthy but during periods of stress, these carriers may...
ORGANISATION:
University of Tasmania (UTAS)
Environment
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Studies on the physiological responses of wrasse Pseudolabrus tetricus, and the horseshoe leatherjacket, Meuscheria hippocrepis, to capture and transport

Project number: 1992-125.15
Project Status:
Completed
Budget expenditure: $33,740.00
Principal Investigator: Nigel Forteath
Organisation: University of Tasmania (UTAS)
Project start/end date: 2 Nov 1994 - 6 Nov 1998
Contact:
FRDC

Objectives

1. Determiniation of holding tank requirements to maintain both blue-throated warsse and horseshoe leatherjackets on capture (i.e. correct stocking levels and flow rates)
2. Elucidation of an acceptable acclimation procedure for survival at low temperatures for both species
3. Determination of the incipient lethal temperature for transportation (i.e. the lowest temperature beyond which species cannot live for an indefinite period.
4. Determination of the effects of lactate and hypercapnia on comatose animals.
Environment
PROJECT NUMBER • 2004-215
PROJECT STATUS:
COMPLETED

Aquafin CRC - Atlantic Salmon Aquaculture Subprogram: establishment of challenge for AGD

This project has increased our knowledge of Amoebic Gill Disease, in particular about the pathogen and the dynamics of infection. We have described a new species of neoparamoeba, Neoparamoeba perurans, and showed that it has been consistently associated with AGD worldwide. Stocking...
ORGANISATION:
University of Tasmania (UTAS)

SCRC: Improvements in Yellowtail Kingfish larval and juvenile survival and quality

Project number: 2009-749.20
Project Status:
Completed
Budget expenditure: $0.00
Principal Investigator: Michael Thomson
Organisation: University of Tasmania (UTAS)
Project start/end date: 14 Jul 2008 - 29 Sep 2010
Contact:
FRDC

Need

Yellowtail Kingfish culture is a rapidly expanding industry in Australia, particularly in rural South Australia, where it is driving the increase in the ‘other’ category of aquaculture production from ~1100 tonnes valued at ~$9 million in 2002-03 to 2000 tonnes and $17 million in 2004-05 (ABARE, 2006). Regarding future production, CST alone are projecting an increase in annual production towards 8,000 T by 2015.

CST is the largest producer of Yellowtail Kingfish in Australia having produced over 1.25 M juveniles in 2007. The company operates two Yellowtail Kingfish hatcheries at Arno Bay and Port Augusta. The production of quality larvae from hatcheries underpins the production of farmed fish and low survival and high levels of malformations significantly increase costs.

Survival of Yellowtail Kingfish juveniles in Australian marine hatcheries is very low in comparison to many other marine species such as sea bass and bream produced in larger more mature industries, for example in Europe. Of particular note, several skeletal malformations have been reported in Australia and New Zealand, although few are well documented (Yellowtail Kingfish, Cobcroft et al., 2004).

There is also high variability in hatchery survival rates and the rate and severity of deformities among production runs and commercial hatcheries.

By way of illustration, the direct benefit to Clean Seas Tuna Ltd. of reducing malformations in Yellowtail Kingfish is estimated to be $1 million p.a. In this example a reduction in malformations from 40% to 20% (on 2.0 M juveniles before quality grading) could produce a further 400,000 good quality juveniles @ $2.50 (market value) = $1,000,000.

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