The many challenges of disease management in aquaculture
Regardless of the aquatic species an aquaculture venture produces, there are significant risks to su...
August 19, 2019
JWAS Editor's Choice Awards 50(4)
Growth performance and hemobiochemical parameters in South African dusky kob (Argyrosomus japonicus, Sciaenidae) offered brewer’s yeast (Saccharomyces cerevisiae) as a feed additive
Madibana, M.J. and V. Mlambo
Single-cell proteins have potential to enhance feed utilization in fish. Madibana and Mlambo (2019) evaluated the effect of graded levels of dietary inactivated brewer's yeast, Saccharomyces cerevisiae, on the dusky kob, Argyrosomus japonicus, an emerging culture species. The maximum inclusion level of brewer's yeast that does not impair growth performance and health of dusky kob was determined to be 50 g/kg.
Optimizing stocking density and microalgae ration improves the growth potential of tropical black-lip oyster, Saccostrea echinata, larvae
Nowland, S.J., W. A. O’Connor, and P. C. Southgate
While hatchery culture methods are well developed for a number of temperate oyster species, similar information is not available for many tropical oysters. A key bottleneck to the culture of the black-lip rock oyster, Saccostrea echinata, is the availability of spat. Nowland et al. (2019) conducted a series of experiments from which recommendations for key hatchery culture parameters for each major larval stage of the black-lip rock oyster were developed.
Production of acute hepatopancreatic necrosis disease toxin is affected by addition of cell-free supernatant prepared from AI-2-producing Vibrio harveyi mutant
Pumkaew, M., S. Taengchaiyaphum, S. Powtongsook, W. Pungrasmi, and K. Sritunyalucksana
Acute hepatopancreatic necrosis disease results in serious shrimp mortalities through two virulent binary toxins produced by a specific strain of Vibrio parahaemolyticus (VPAHPND). Quorum sensing (QS) is known to regulate toxin production, perhaps through involvement of the AI-2 molecule. Pumkaew et al. (2019) showed that furanone inhibited AI-2 activity and reduced toxin production, suggesting potential avenues for management of VPAHPND infection.
Apparent digestibility and protein quality evaluation of selected feed ingredients in Seriola dumerili.
Tomás-Vidal, A., R. Monge-Ortiz, M. Jover-Cerdá, and S. Martínez-Llorens
Continued advancements in aquaculture of marine species depend upon development of cost-effective feeds. Less-expensive alternatives to fishmeal are needed, but the suitability of feed ingredients depend largely on their respective digestibility. Tomás-Vidal (2019) assessed and report the apparent nutrient digestibility and protein quality of 12 different commercially available ingredients for the Mediterranean yellowtail, Seriola dumerili.
About World Aquaculture Society
The World Aquaculture Society was founded in 1969 as the World Mariculture Society. Since it’s beginning the membership in WAS has grown to more than 3,000 members in about 100 countries representing the global aquaculture community. In order to meet the expanding international nature of the Society and to address specific needs in various areas of the world, the WAS has created Chapters in the United States, Japan, Korea, Latin American and Caribbean region, Asian-Pacific region and most recently in Africa.
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