World Aquaculture Society Meetings


Your browser does not support the most current secure communications protocol. The World Aquaculture Society is committed to the security of your private information. In order to accept credit card data on this site we are recquired to be in compliance with Payment Card Industry (PCI) standards. Current PCI standards will not allow us to accept traffic from browsers that do not support TLS 1.2 after June 30, 2018. We are alerting you to the important need to update your browser. Changes to our web server made on or before June 30, 2018 will make unavailable with the browser you are currently using. [More..]

Add To Calendar 27/04/2016 13:30:0027/04/2016 13:50:00Africa/JohannesburgAsian-Pacific Aquaculture 2016HELLO POND - TRIALLING A FLAVANOID PRODUCT FOR SHRIMP (L.vannamei) UNDER PRACTICAL FARM CONDITIONS.   Crystal 5The World Aquaculture Societyjohnc@was.orgfalseanrl65yqlzh3g1q0dme13067DD/MM/YYYY


Ekachai Jenwitheesuk1, Niti Chuchird 2, Monika Korzekwa1, Andreas Lewke1, Susanne Kirwan1
1 Dr. Eckel GmbH
Im Stiefelfeld 10
56651 Niederzissen, Germany

Mortality during grow-out, for example that caused by EMS is a major challenge in shrimp farming worldwide. While early stage studies are feasible in lab conditions, possible solutions have to be tried on a pond scale, to involve the complex biome found in grow-out ponds. The goal of our research and development efforts was, to support immune defence of Pacific White Shrimp via nutrition. In laboratory experiments positive effects of a feed additive rich in specific flavonoids (Anta®Ox Aqua from Dr. Eckel, Germany) were already proven (Gessner et al. 2012, 2013; Fiesel et al. 2014; Niyamosatha et al. 2015). In a pond trial lead by Kasetsart University these results have now been confirmed for realistic farming conditions in Thailand. All groups where fed with commercial pelleted feed for white shrimp. Ponds of the treatment group received feed with the botanical feed additive at a concentration of 800 ppm via the feed. Performance parameters were measured, followed by microbiological, histological and immunological analyses.

In the treatment group a significant reduction of the  bacterial load was detected: Total bacterial load was reduced by 90%, total Vibrio counts by 87% and Vibrio parahaemolyticus counts by 90% (Fig. 1). Hepatopancreas samples of the control group had 20% to 80% necrotic cells, typical for EMS. In contrast, shrimp of the treatment group showed no signs of atrophy and bacterial infection and appeared healthy and vigorous. Furthermore, the lower bacterial infection in the treatment group accounted for better survival rate (91% vs. 63%). This improved total biomass production group during grow-out as well as feed conversion ratio (1.35:1 vs. 1.55:1).

In summary a low dosage specific flavanoids complex can improve health and performance of pacific white shrimp in ponds, similar to improvements previously only proven in lab conditions.

Copyright © 2001-2018 World Aquaculture Society All Rights Reserved.