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Improving risk management of paralytic shellfish toxins in Blacklip Abalone (Haliotis rubra rubra)
Citation
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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Abstract
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 (Ms Alison Turnbull) |
| UTAS Author: | Hallegraeff, G (Professor Gustaaf Hallegraeff) |
| UTAS Author: | Dorantes-Aranda, JJ (Dr Juan Dorantes Aranda) |
| UTAS Author: | Seger, A (Mr Andreas Seger) |
| ID Code: | 139448 |
| Year Published: | 2020 |
| Deposited By: | Fisheries and Aquaculture |
| Deposited On: | 2020-06-16 |
| Last Modified: | 2020-06-16 |
| Downloads: | 2 View Download Statistics |
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