Modest levels of nitrate nitrogen – in the 75 to 100 mg/L range – may be more harmful to aquaculture-raised rainbow trout than producers realize. A team of scientists at the Conservation Fund’s Freshwater Institute led by John Davidson documented deformities and significant behavioral changes in rainbow trout (Oncorhynchus mykiss) raised in recirculating aquaculture systems (RAS) with nitrate nitrogen concentrations at levels less than one-tenth the recommended maximum nitrate nitrogen level of 1,000 mg/L. They believe the changes were spurred by chronic exposure to nitrate nitrogen.
An incurable bacterial infection wiping out Southeast Asian shrimp is also ravaging the profits of Red Lobster, whose parent company, Darden Restaurants, saw earnings fall 18% to $109.7 million in the quarter that ended in February. The biggest publicly traded casual dining company in the US, Darden also runs the Olive Garden, LongHorn Steakhouse and other restaurants....
2013 Overview: A Year of Highs and Lows of the Aquaculture Industry TheFishSite.com Researchers found that EMS is caused by a unique strain of the Vibrio parahaemolyticus pathogen, which is transmitted orally, colonises in the shrimps...
Join our free webinar! December 5th, 2013, 2:00-2:30 p.m. EST
Register now to join Tim Grooms and Darrin Honious for an informative overview of the YSI aquaculture monitoring and control system.
We will cover product advancements that improve system performance, productivity and efficiency.
Topics will include: • optical based dissolved oxygen • connectivity/networking options • automated feeding with YSI Feed Smart • data management with AquaManager and the AquaViewer App • alarming options
Applications for M&C systems include tank-based/RAS commercial aquaculture, aquaculture research, live haul, public aquariums, algae culture and anyone interested in aquaculture monitoring and control technology to improve performance, productivity and efficiency.
The live webinar will be recorded and you will receive a link afterwards to view the recording
Efficiency is the key to success in shrimp production—creating the conditions for shrimp to efficiently convert nutrients into body weight, and running a business that achieves that conversion efficiently.
Potomac River. Oyster aquaculture in the Potomac River estuary could result in significant improvements to water quality, according to a new study. All of the nitrogen currently polluting the Potomac River estuary could be removed if 40 percent of its river bed were used for shellfish cultivation, according to the joint study. The researchers determined that a combination of aquaculture and restored oyster reefs may provide even larger overall ecosystem benefits. Oysters, who feed by filtering, can clean an enormous volume of water of algae which can cause poor water quality.
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