Hatchery crashes among shellfish research hatcheries along the Atlantic coast of the United States: A case study of production analysis at Horn Point Laboratory

A marine probiotic treatment against the bacterial pathogen Vibrio coralliilyticus to improve the performance of Pacific (Crassostrea gigas) and Kumamoto (C. sikamea) oyster larvae

“…Oyster hatcheries, however, have periodically experienced severe larval losses during the past two decades, leading to seed shortages and supply disruptions (Elston et al, 2008;Richards et al, 2015). Initially, these losses were mainly attributed to ocean acidification (Barton et al, 2012;Gray et al, 2022), and currently many hatcheries employ sophisticated systems that measure and correct acidified incoming water. Unfortunately, these treatments have not entirely resolved the problem, suggesting other factors, such as pathogens, likely play a significant role in these losses and contribute to various sub-lethal effects on oyster health (Marques et al, 2006).…”

Development and evaluation of a formulation of probiontPhaeobacter inhibensS4 for the management of vibriosis in bivalve hatcheries

“…The copyright holder for this preprint this version posted December 28, 2022. ; https://doi.org/10.1101/2022.12.27.522043 doi: bioRxiv preprint conditions, or other pathogens [50,51]. Also, we observed that S4 treatment did not increase the growth of the larvae in any of the trials, suggesting that probiont S4 may not provide growth enhancement benefits.…”

“…The lack of protection by S4 to larval losses in this trial may be due to the inability of S4 treatment to protect larvae against crashes due to causes other than vibriosis. Some eastern oyster hatcheries try to avoid spawning in July and August, since larval performance is known to be low at this time of the year due to decreased water quality (personal communications from hatchery managers) and other potential causes such as adverse environmental (e.g., toxins from harmful algal blooms, acifidication) or physiological (e.g., poor conditioning of broodstock) conditions, or other pathogens [50,51]. Also, we observed that S4 treatment did not increase the growth of the larvae in any of the trials, suggesting that probiont S4 may not provide growth enhancement benefits.…”

Development and evaluation of a formulation of probiont Phaeobacter inhibens S4 for the management of vibriosis in bivalve hatcheries

“…The lack of protection by S4 to larval losses in this trial may be due to the inability of S4 treatment to protect larvae against crashes due to causes other than vibriosis. Some eastern oyster hatcheries in the Atlantic coast of the United States try to avoid spawning in July and August since larval performance is known to be low at this time of the year due to decreased water quality (personal communications from hatchery managers) and other potential causes such as adverse environmental (e.g., toxins from harmful algal blooms and water acidification) or physiological (e.g., poor conditioning of broodstock) conditions or other pathogens (Ashton et al, 2020;Gray et al, 2022). Also, we observed that S4 treatment did not increase the growth of the larvae in any of the hatchery trials as reported in two other oyster species, Pacific and Kumamoto oysters (C. gigas and C. sikamea; Madison et al, 2022).…”