Tag production

Shrimp aquaculture could improve its position through more accurate and consistent identification and counting of postlarvae. 

With relatively low use of land and water, intensive aquaculture systems can support much higher production than extensive systems. 

Live diets for reared marine larvae must be cost-effective and versatile while providing good nutrition and being easily captured and digested. Copepods offer superior nutritional value, but their rearing requires space and is laborious. 

Hybrid catfish offer production advantages over channel catfish. Trials show greater survival, faster growth and shorter production cycles. 

The slipping shrimp production in Southeast Asia due to disease has a number of causes. Emerging viral diseases take a toll, as do bacterial diseases caused by vibrios and other pathogens. 

While Chile’s mussel industry has entered a growth phase, challenges remain, especially in the seed production and grow-out components. This contrasts with the well-developed nature of the country’s processing plants and marketing outlets. 

Smolt production in Norwegian hatcheries will likely increase during the next decade to answer salmon grow-out needs. Farmers are converting existing flow-through systems to partially or fully incorporate recirculation technologies. 

Although the application of selective breeding and genetics can yield dramatic results, the use of genetically improved stock varies widely among aquaculture sectors. Virtually all Atlantic salmon and rainbow trout producers use improved stock, while use of genetically improved tilapia varies widely. 

A study examined the effects of removing suspended solids using side-stream settling chambers in a superintensive biofloc shrimp system. The chambers reduced nitrate-nitrogen and phosphate concentrations and improved shrimp growth rate and biomass. 

In the evolution of shrimp farming, white shrimp emerged as the primary species. While some farms in the Americas successfully converted to intensive practices, wide adoption has been limited. 

Intensive management of tilapia broodstock and artificial incubation of eggs increase output and cut costs for fingerling production. 

Although selection in fish is progressing rapidly, slower adaption to captivity over several generations can limit animal welfare problems. 

Hubbs-SeaWorld Research Institute developed an integrated larval-nursery recirculating aquaculture system for California halibut utilizing shallow raceways for juvenile culture. 

Work on the reproduction and larval rearing of southern Brazilian flounder supports the feasibility of flounder culture. Further research will improve weaning and grow-out techniques for the species. 

Turkey has many kilometers of coastline, but shellfish culture is developing slowly in the country. Only two bivalve farms producing mussels presently operate there. Mussel spat is collected naturally on the long line systems.