Total Ammonia Nitrogen (TAN) - Live Hauling of Fish
Total Ammonia Nitrogen (TAN) (Live Hauling of Fish)
eng
Dataset
aquaculture
gas transfer
heat transfer
water quality
Hagerman Valley, Idaho
Montlake
NWFSC Montlake
Nitrogen Determinator
In certain markets, live fish can be sold for substantially higher prices than fresh dressed fish. A significant live-haul industry has developed in the U.S. and fish are commonly hauled 1,500-2,000 miles (25-30 hours) to market. The most common species hauled are tilapia, channel catfish, and rainbow trout; a smaller amount of marine rockfish, hybrid striped bass, and carp are also hauled. The most significant advancement in hauling technology in the last 20 years has been the use of bottled oxygen gas or liquid oxygen to maintain adequate dissolved oxygen levels. These types of systems can maintain significantly higher DO levels than systems using air. Some common stressors include harvest and loading procedures (pumping or out of water transfer), shaking as the transport vehicle is moving, low frequency sound from the vehicle and water treatment systems, crowding, and poor water quality (high ammonia and carbon dioxide levels, low dissolved oxygen), high light levels, or extreme water temperature. The physical shape and construction of the hauling unit may have an important impact on localized low DOs, physical damage to the fish, and survivability. Very little information has been published on the chemical and physical conditions in transport systems during long-distance transport and this limited data may not be representative of current commercial systems.
This research will be conducted with NWFSC staff in cooperation with private fish farmers in the Pacific Northwest. Specific sub-objectives will include the following:
(1) Documentation of water quality during transport and impact on mortality and product quality
(2) Design of efficient aeration systems for oxygen transfer and carbon dioxide stripping
(3) Determination of the impact of transport tank design and aerator type on the thermal balance during hauling.
The impact of this project will be increased survival and product quality of transported fish as a result of adopting the recommended protocols and utilization of the models. Project outputs will include peer-reviewed publications, popular publications, and conference presentations.
Total ammonia nitrogen will be measured using an Orion Ammonia electrode, calibrated daily with standard solutions (0.1, 1, 10, and 100 mg/Liter), and results expressed as mg/Liter TAN.
Northwest Fisheries Science Center
Colt, John E
https://www.fisheries.noaa.gov/inport/item/18000
https://www.fisheries.noaa.gov/inport/item/17938
northlimit=47.6449;
eastlimit=-122.3062;
southlimit=47.6449;
westlimit=-122.3062;
name=Hagerman Valley, Idaho: Tilapia Farms;
northlimit=47.6449;
eastlimit=-122.3062;
southlimit=47.6449;
westlimit=-122.3062;
name=NWFSC Montlake: NWFSC Montlake lab;
start=2014-06-01;
start=2014-06-01;
N/A
2017-02-17