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Improving risk management of paralytic shellfish toxins in Blacklip Abalone (Haliotis rubra rubra)


Turnbull, A and Malhi, N and Jolley, J and Harwood, T and Hallegraeff, G and Dorantes-Aranda, JJ and Bansemer, M and Stone, D and Seger, A, Improving risk management of paralytic shellfish toxins in Blacklip Abalone (Haliotis rubra rubra), Fisheries Research and Development Corporation, Australia, FRDC Project No 2017-225 (2020) [Government or Industry Research]

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The accumulation of paralytic shellfish toxins (PST) of microalgal origin in abalone tissues causes a trade and human health risk that requires active management. Toxic algal blooms of the genus Alexandrium have recently caused several abalone harvest closures on the east coast of Australia. Risk management is hampered by a scarcity of knowledge on the mechanisms and rates of accumulation and depuration of the associated PST. A collaborative effort by researchers from the South Australian Research and Development Institute (SARDI), the Institute of Marine and Antarctic Science (IMAS) and Cawthron Institute conducted field studies on the east coast of Tasmania during toxic blooms in 2018 and 2019, and experimental studies in South Australia in 2018 to investigate uptake and depuration of PST from A. catenella in Haliotis rubra rubra, Blacklip Abalone. Several key results from the study will be used to inform improved risk management of this issue. In particular, we showed for the first time that: abalone can accumulate PST from exposure to toxic algal cells; the predominant accumulation is in the foot tissue; and toxins depurate extremely slowly from this tissue. We conducted a successful laboratory validation of a rapid screening test for PST analysis in foot tissue for future use during A. catenella blooms that should lead to significant savings in PST monitoring in Tasmania.

Item Details

Item Type:Government or Industry Research
Keywords:paralytic shellfish toxins, abalone, rapid analysis, uptake
Research Division:Chemical Sciences
Research Group:Organic chemistry
Research Field:Natural products and bioactive compounds
Objective Division:Animal Production and Animal Primary Products
Objective Group:Fisheries - wild caught
Objective Field:Wild caught edible molluscs
UTAS Author:Turnbull, A (Dr Alison Turnbull)
UTAS Author:Hallegraeff, G (Professor Gustaaf Hallegraeff)
UTAS Author:Dorantes-Aranda, JJ (Dr Juan Dorantes Aranda)
UTAS Author:Seger, A (Dr Andreas Seger)
ID Code:139448
Year Published:2020
Deposited By:Fisheries and Aquaculture
Deposited On:2020-06-16
Last Modified:2020-06-16
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