Oyster producers in New Brunswick lost nearly their entire harvesting season in 2024 due to parasite infestations [1].
The loss threatens the local aquaculture economy and the stability of regional seafood supplies. Because these parasites can spread rapidly through coastal waters, the collapse of these beds may signal a broader ecological risk for other shellfish operations in the region.
The devastation is attributed to the presence of two specific parasites: MSX and Dermo [1]. Reports said these infestations devastated the oyster beds, leading to the catastrophic harvest failures [1]. The Canadian Food Inspection Agency said the MSX parasite was present in the province [2].
While the parasite outbreak is the primary driver of the loss, other environmental factors may have played a role. Some reports said a reduction in certain harvests was due to hot, dry weather and a lack of rain during August [3]. This suggests a compounding effect where environmental stress may have made the oyster populations more susceptible to disease.
Local producers are now facing the aftermath of the 2024 season, which saw the majority of their crop destroyed [1]. The scale of the loss is described as catastrophic, leaving growers to determine how to recover their beds and prevent future outbreaks of MSX and Dermo [1].
“Oyster producers in New Brunswick lost nearly their entire harvesting season in 2024”
The collapse of the 2024 oyster harvest highlights the vulnerability of monoculture aquaculture to biological threats. When combined with climate stressors like extreme heat and drought, parasitic outbreaks can move from manageable issues to total crop failures, potentially forcing a shift toward more parasite-resistant oyster strains or stricter biosecurity measures in Canadian waters.
