Essential oils increase weight gain in channel catfish
Essential oils are linked to livestock performance gains. In research with channel catfish, inclusion resulted in greater feed consumption and weight gain.
Uncharted waters: Kenya takes dramatic leap in aquaculture
Kenya's economic stimulus program includes a bold move to help the country’s small-scale farmers literally dig themselves out of poverty with fish ponds.
Potassium diformate does not affect shrimp growth, survival
An eight-week growth trial evaluated the effects of potassium diformate on the growth performance and digestibility of Pacific white shrimp. Weight gain was not significantly affected by different levels of PDF in diets, and survival was high for all treatments.
Product improves nitrification in RAS
Healthy populations of both ammonia- and nitrite-oxidizing bacteria must be present in aquaculture systems to support the nitrification of potentially toxic ammonia to nitrite, with further oxidation to less problematic nitrate.
Oyster output affected by environmental features of farm site
In southern Brazil, management data for Pacific cupped oyster culture were assessed to characterize production in relation to environmental parameters.
Novel soy proteins, oils replace fishmeal to achieve FIFO under 1:1 in amberjack
In a nutrition trial, longfin amberjack received two diets composed of 40 percent soy protein concentrate and 10 percent fishmeal, and a control diet with 20 percent fishmeal.
American fisheries society calls for immediate-release fish sedatives
The absence of practical immediate-release sedatives for fish jeopardizes fish, fisheries, fish culture and research, posing risks to aquatic resources as well as those handling fish.
Single-cell detritus: fermented, bio-enriched feed for marine larvae
Single-cell detritus is a seaweed-based bioproduct whose use as feed has been studied with oysters and artemia. The authors are working toward the development of SCD for shrimp larvae.
Bacterial diseases cause granulomas in fish
Granulomas in diseased fish often indicate infections by bacteria. External signs range from ulcers and emaciation to lethargy or no signs at all. Internally, gray or tan foci present in organs and can coalesce with severe inflammation.
Shrimp sampling method improves stocking process
Accurate estimates of shrimp populations and size variability by sampling can help managers make informed decisions that reduce feeding costs and improve system performance.
New techniques, peptide treatments aid intensive shrimp farm in Ecuador
The PescaMaris shrimp farm in Ecuador uses fish peptide isolates to accelerate probiotic bacteria growth and improve water quality.
Working with fish, limiting zoonotic diseases
Prevention through good hygiene, use of gloves and basic biosecurity procedures is the best method for reducing the risk of acquiring zoonotic diseases.
Norwegian salmon smolt farms embracing RAS to raise production
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.
Tilapia farming faces expansion issues in Thailand
Thailand’s tilapia industry has been able to grow into a thriving sector thanks to technological advances and knowledge sharing.
Testing finds resistance to WSSV in shrimp from Panamanian breeding program
In a challenge test under controlled conditions using a severe strain of the virus, resistance to WSSV was shown in shrimp supplied by the Camaronera de Coclé, S.A. L. vannamei genetics program.
Ring tests compare PCR results from diagnostic laboratories
The University of Arizona’s Aquaculture Pathology Laboratory oversees ring tests for a group of shrimp diagnostic laboratories in 10 countries.