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Detection of toxins and harmful algal bloom cells in shellfish hatcheries and efforts toward removal
Sanderson, Marta P. Hudson, Karen Gregg, Lauren Chesler-Poole, Amanda Small, JA M. Reece, Kimberly S Carnegie, Ryan Smith, Juliette L.
Sanderson, Marta P.
Hudson, Karen
Gregg, Lauren
Chesler-Poole, Amanda
Small, JA M.
Reece, Kimberly S
Carnegie, Ryan
Smith, Juliette L.
Abstract
As the start of the supply chain for the aquaculture industry, hatcheries are a crucial component in the success of oyster and northern quahog (hard clam) aquaculture on the East Coast of the US. Intermittent failures in hatchery production slow industry growth and reduce profits. To begin investigations into the possible role of algal toxins in hatchery production failure, post-treatment hatchery water from one research and four commercial hatcheries in lower Chesapeake Bay, USA, was sampled for (1) toxin presence and (2) harmful algal bloom (HAB) cell enumeration. Overall, seven toxin classes, likely produced by six different HAB species, were detected in post- treatment hatchery water, despite a lack of visually identifiable HAB cells within the facility. Toxins detected include pectenotoxin-2, goniodomin A, karlotoxin-1 and karlotoxin-3, okadaic acid and dinophysistoxin-1, azaspiracid-1 and azaspiracid-2, brevetoxin-2, and microcystin-LR. In a second, more targeted study, two batches of source water were followed and sampled at each step of a water-treatment process in the VIMS Aquaculture Genetics and Breeding Technology Center research hatchery in Gloucester Point, Virginia, USA. Two treatment steps showed particular promise for decreasing the concentrations of the three toxins detected in the source water, 24-h circulation through sand filters and activated charcoal filtration. Toxin concentrations of pectenotoxin-2, 3.53 ± 0.56 pg mL
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2023-01-13
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Aquatic Health Sciences Peer-Reviewed Articles
Biological Sciences Peer-Reviewed Articles, Harmful algae Toxins, Shellfish hatcheries, Water treatment, Aquaculture health
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Virginia Institute of Marine Science
DOI
https://doi.org/10.1016/j.aquaculture.2022.738714