Displaying items by tag: production
Early Sturgeon Sex Discrimination (ESSD), a new diagnostic service for hatcheries and farms
This article was featured in EUROFISH Magazine 2 2021.
Sturgeon farmers producing fish for caviar would benefit hugely from a molecular-biological sex test for juvenile and adolescent sturgeons. Early sexual identification can significantly decrease production costs by increasing the number of females for caviar production while maintaining a balance of male animals for meat production and for use as brood stock.
Additional advantages from the genomic analysis to determine sex could be the identification of genes implicated in growth, meat production, or egg quality (caviar) which opens the door for improvements in these areas. Currently, the normal male to female ratio in production facilities is approximately 1:1 through natural selection. If an early sex test is available, then this ratio could be manipulated to favour the production of either caviar or meat.
Protests continue to pack the streets in Chile, triggered by a relatively small increase in subway fares in mid-October. During the unrest, salmon production has dropped substantially due to blockades and curfews that prevent people and supplies reaching production sites. SalmonExpert Chile reports how protesters continue to block access routes to Quellón, a hub for aquaculture and fisheries in southern Chile. Trucks transporting supplies like feed have been denied access to farms jeopardising the lives of 800 thousand fish that have not been fed for more than a week. Thirty thousand salmon are already reported dead and without the possibility of dealing with these mortalities, health risks due to high bacteriological levels will only aggravate the situation. A spokeswoman for the National Coordinator of the Salmon Industry and Related Branches stresses that these mortalities will cause immense pollution in the Quellón Bay, forcing companies in the area to move their fish to other sites and threatening the future of labour for the seafood industry in Quellón. Estimates say that production capacity is down about 50% and prices for salmon have increase at least 22%.