An algae bloom in the Jervis Inlet in British Columbia, Canada, has killed an estimated 250,000 fish at two Grieg Seafood’s salmon farms in the area.
The Bergen, Norway-headquartered company, which operates several salmon farms and a hatchery in British Columbia, said an outbreak of heterosigma, a species of microscopic algae, spread in high concentration through the entire water column in the inlet.
“Grieg Seafood continuously works to improve biosecurity and all of Grieg Seafood’s sites perform algal monitoring by taking daily samples which are analyzed using advanced image analysis techniques. This allows for the identification of the species, prevalence and depth distribution of any algae present,” the company said in a press release.
However, due to the abundance of the algae, the company said use of aeration treatments or other measures to protect its fish “could not prevent the incident.”
The bloom killed an estimated 50 percent of the fish at the two sites, a total loss estimated at 1,000 tons. The fish were scheduled to be harvested in the second half of 2018, the company said.
In its release, Grieg Seafood said it carried insurance, and that the estimated cost of the die-off, including individual share of insurance, will total around NOK 25 million (USD 3.1 million, EUR 2.6 million). That cost will be realized on the company’s second-quarter financial statement, Grieg said.
Courtesy of seafoodsource.com
After it is revealed more than a million farmed fish died within six months in Macquarie Harbour, one salmon company effectively says “we told you so”, another says the dead fish were “replaced quickly” and the third says it has no obligation to detail its losses to the public.
Tasmania’s Environment Protection Authority (EPA) confirmed 1.35 million salmon died in Macquarie Harbour on Tasmania’s west coast since last October.
An area management agreement report provided by Huon Aquaculture, Petuna and Tassal found the deaths were mainly due to an outbreak of pilchard orthomyxovirus (POMV), transferred from wild populations.
That report had not been made available to the public.
EPA director Wes Ford told ABC Hobart the 2017 “mixing of young fish with old fish” could exacerbate the likelihood of disease in the population.
“POMV can be exacerbated by stress caused by heat, low oxygen, and I think this summer we’ve seen some elevated temperatures and clearly some concerns about oxygen.”
He confirmed the EPA would be reducing Macquarie Harbour’s biomass limit by 21 per cent over the next two years, from 12,000 tonnes to 9,500 tonnes.
Courtesy of abc.net.au