NEWS FEED & ADDITIVE MAGAZINE May 2022 95 respiration chambers under thermoneutrality (seven days at 22°C) then under heat stress conditions (seven plus six days at 28°C). They were fed either a diet with or without the live yeast Saccharomyces c. boulardii CNCM I-1079 (LEVUCELL SB). Thanks to high-troughput sequencing techniques (16S metabarcoding), this study has also provided new insights on the key role of the digestive microbiota under thermal stress conditions. As confirmed in recent publications (Xia et al., 2022; Xiong et al. 2022), short-term and chronic heat stress challenge has an impact on the microbiota composition. Caroline Achard, Ph.D, Research Scientist at the Lallemand Monogastric Center of Excellence explains: “In our study, heat stressed pigs notably showed increased levels of Clostridium sensu stricto group, Romboutsia and Ruminococcaceae taxa. Levucell SB supplementation attenuated some of these effects while it increased the abundance of the beneficial Lactococcus lactis bacteria and Subdoligranulum genera.” “Interestingly, during heat stress, higher levels of beneficial species such as Ruminococcus Bromii and Lactococcus lactis, were positively correlated with better dry matter intake and energy retention. R. bromii has been described as a keystone species promoting the growth of other microorganisms able to degrade resistant starch, while L. lactis may beneficially interact with the host immune system. Altogether, this may explain the higher energy retention observed under heat stress,” she concluded. In addition, thanks to the use of respiratory chambers, this trial evaluated the benefit of Saccharomyces c. boulardii CNCM I-1079 on pig metabolism. Indeed, under heat stress, pigs tended to eat less and divert their energy metabolism from growth to ensuring thermoneutrality. As a result, growth performance was better preserved when feeding the live yeast under heat stress: average daily gain was increased from 1.14 to 1.28 kg/d (P=0.03). Marubeni Corporation and Proximar Seafood AS have reached an agreement that Marubeni will be the exclusive distributor in Japan for all the Atlantic salmon produced by the closed recirculating aquaculture system (RAS) which Proximar is constructing in Japan. The agreement covers sales of all volumes produced by Proximar for the Japanese market and has an initial term of 10 years. Both parties will be actively involved in the marketing efforts, with the aim to build a strong premium sustainable seafood brand. Marubeni, with its subsidiary Benirei Corporation at its core, has a certain market share in Japan for handling wild and sea-farmed salmon and has invested in Danish Salmon A/S in Denmark, which is one of the world's largest RAS-based Atlantic salmon producers, since April 2020. As the exclusive distributor for domestic Atlantic salmon produced by Proximar in RAS, Marubeni will expand its environmentally friendly food business and contribute to the stable supply of sustainable food with a reduced environmental impact. In Japan, the demand for Atlantic salmon is growing, and Japanese consumers have a strong preference for freshness and appreciation of local produce. In recent years, consumer awareness related to sustainability has also been increasing. Marubeni, Proximar team up for fresh Atlantic salmon in Japan Marubeni and Proximar announced an exclusive sales and distribution agreement for fresh Atlantic salmon in Japan.
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