14 DECEMBER 2024 • WORLD AQUACULTURE • WWW.WAS.ORG • Stites, W., Weldon, A., Reis, J., Ito, P., Rhodes, M., & Davis, D. A. (2024). Evaluation of a carbohydrase (xylanase and glucanase) enzyme complex in diets for Florida pompano Trachinotus carolinus. Journal of the World Aquaculture Society, 55(5), e13095. https://doi.org/10.1111/jwas.1309512 Similar to other aquaculture species, Florida pompano, Trachinotus carolinus, can be reared on diets that utilize soy-based protein; however, carbohydrates and other anti-nutritional factors can affect digestibility. This study investigated the use of dietary carbohydrase enzymes to improve carbohydrate digestibility for Florida pompano. The authors utilized the carbohydrase enzyme complex (Natugrain® TS L, BASF Corporation, Ludwigshafen, Germany), which consisted of endo-1,4-ß-xylanase and endo-1,4-ßglucanase and was designated Xyl+Glu, in juvenile pompano diets and determined the effects on growth performance, feed utilization, and digestibility. A growth trial was conducted in a recirculating system using four iso-nitrogenous (40%) and iso-lipidic (8%) test diets consisting of 0, 0.015, 0.030, and 0.045% of Xyl+Glu. No significant differences (p>0.05) in growth and feed conversion were observed; however, there were significant differences in the thermal growth coefficient (TGC) between the 0.015 and 0.030% diets. All the diets containing the enzymatic treatments showed significant differences in apparent digestibility for crude protein compared to the basal diet. Based on the digestible protein improvements, the authors calculated a 3.37% improvement in available protein for Florida pompano when fed this enzyme complex. They suggest that further research is needed that evaluates different types of exogenous enzymes to improve plant-based diets for Florida pompano. • Wang, T., Wang, F., Sun, N., Cui, G., Chen, Y., Zhang, M., Sun, S., Ma, R., Sun, C., &Han, H. (2024). Effects of Bacillus cereus YB1 on growth, intestinal digestive enzyme activity, liver antioxidant enzyme activity, and intestinal structure of black rockfish, Sebastes schlegelii. Journal of the World Aquaculture Society, 55(5), e13078. https://doi.org/10.1111/jwas.13078 Probiotic use in aquaculture has increased and is viewed as a potential means of improving health and reducing the need for antibiotic treatments. The authors of this study investigated the effects of feeding Bacillus cereus YB1 to juvenile black rockfish (Sebastes schlegelii). They compared growth, intestinal digestive enzyme activity, liver antioxidant enzyme activity, and intestinal tissue structures following feeding of four diets: a control group with no YB1 supplement in the diet and three treatment groups E-L, E-M, and E-H containing 105, 106, and 107 CFU/g B. cereus YB1, respectively. Results from this study showed a significant increase in weight gain and specific growth rate and a reduction in feed conversion rate in fish fed the three diet treatment groups. Along with the observed growth enhancement in black rockfish following feeding of B. cereus YB1 strain, antioxidant enzyme activity in the liver and histological gut structure was enhanced. The authors therefore suggest that including B. cereus YB1 as a diet supplement during black rockfish farming could provide eco-friendly benefits associated with enhanced growth and health. Table of Contents Your society journal JWAS is fully available to you including all back issues at https://onlinelibrary.wiley.com/journal/17497345 or at www.was.org (just click on the photo of JWAS). Applied Research Green, B. W., Rawles, S. D., Ray, C. L., & McEntire, M. E. (2024). Relationship between stocking rate and production of stocker hybrid tilapia and water quality in a mixtotrophic biofloc system. Journal of the World Aquaculture Society, 55(5), e13087. https://doi.org/10.1111/ jwas.13087 Genc, E., Kaya, D., Genc, M. A., Keskin, E., Yavuzcan, H., Guroy, D., & Aktas, M.(2024). Effect of dietary mannan oligosaccharide inclusion on production parameters of Farfantepenaeus aztecus cultured in a biofloc system. Journal of the World Aquaculture Society, 55(5), e13086. https://doi.org/10.1111/jwas.1308620 Wang, T., Wang, F., Sun, N., Cui, G., Chen, Y., Zhang, M., Sun, S., Ma, R., Sun, C., &Han, H. (2024). Effects of Bacillus cereus YB1 on growth, intestinal digestive enzyme activity, liver antioxidant enzyme activity, and intestinal structure of black rockfish, Sebastes schlegelii. Journal of the World Aquaculture Society, 55(5), e13078. https://doi. org/10.1111/jwas.13078 Original/Fundamental ResearchXuan, C. L., Nguyen, V. L., Wannavijit, S., Outama, P., Khongdee, N., Sutthi, N.,Nguyen, V. V., Hoseinifar, S. H., Srisapoome, P., & Van Doan, H. (2024). Modulation of growth, immunity, and immune-antioxidant gene expression in Nile tilapia, Oreochromis niloticus, culture under biofloc system by dragon fruit, Hylocereus undatus, peel powder. Journal of the World Aquaculture Society, 55(5), e13088. https://doi.org/10.1111/jwas.13088 Bosworth, B., Waldbieser, G., Wise, D., Kumar, G., Lourenco, D., Garcia, A., Ott, B., & Torrans, L. (2024). Effect of strain and enteric septicemia of catfish vaccine-booster on production and processing traits of the Delta Select and Delta Control strains of channel catfish, Ictalurus punctatus. Journal of the World Aquaculture Society, 55(5), e13068. https://doi.org/10.1111/jwas.13068 Pino-Martinez, E., Kamlund, K. A., Balseiro, P., Kraugerud, M., Imsland, A. K. D., & Handeland, S. O. (2024). Elevated water temperature in combination with an increase in day length stimulate a synchronized onset of spermatogenesis in male Atlantic salmon (Salmo salar, L.) postsmolts. Journal of the World Aquaculture Society, 55(5), e13090. https://doi.org/10.1111/jwas.13090 Stites, W., Weldon, A., Reis, J., Ito, P., Rhodes, M., & Davis, D. A. (2024). Evaluation of a carbohydrase (xylanase and glucanase) enzyme complex in diets for Florida pompano Trachinotus carolinus. Journal of the World Aquaculture Society, 55(5), e13095. https://doi. org/10.1111/jwas.13095 Ueno Fukura, M., Collazos Lasso, L. F., Vinatea Arana, L. A., & Baldisserotto, B. (2024). Salinity/ionic balance interactions on the zootechnical performance and histology of Litopenaeus vannamei and water quality in a biofloc system. Journal of the World Aquaculture Society, 55(5), e13093. https://doi.org/10.1111/jwas.13093 Krasnow, R., Gonzalez, S., & Lindell, S. (2024). Improving growth models of cultivated sugar kelp, Saccharina latissima, by accounting for intraspecific variation in thermal tolerance. Journal of the World Aquaculture Society, 55(5), e13085. https://doi.org/10.1111/jwas.13085 the Journal of the World Aquaculture Society Editor’s Choice Awards 55(4)
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