LOLS10在线直播下注

ku酷游备用网址_{实时热点} 亚洲城Bet_{实时热点} 推饼子必胜技巧_{实时热点} 太阳2测速地址_{实时热点} 皇冠体彩吧_{实时热点} 八方国际体育_{实时热点} 龙八体育_{实时热点} 全民福利彩票_{实时热点} 扑克牌28玩法_{实时热点} 彩赢家彩票平台_{实时热点} 亚慱足球app_{实时热点} 足球独赢规则_{实时热点} 云南体彩app_{实时热点} 荣鼎福彩下载_{实时热点} 牛牛登录_{实时热点} 龙八体育官网_{实时热点} 沙巴体育app_{实时热点} 12选5app下载_{实时热点} sunbet联系_{实时热点}

Fish-free feed breakthrough

1 September 2020, at 10:56am

LOLS10在线直播下注Researchers have developed a cost-effective “fish-free” feed for carnivorous marine finfish, in which fishmeal and fish oil have been replaced by poultry meal and algal oil respectively.

The trials took place at Ocean Era's kampachi farm, off Hawaii
The trials took place at Ocean Era's kampachi farm, off Hawaii

© Doug Perrine / SeaPics

During the three-month trial funded by a Saltonstall-Kennedy grant from the National Oceanic and Atmospheric Administration (NOAA), 480 juvenile kampachi (Seriola rivoliana) were fed one of four diets. Two of the diets contained no fishmeal, and one of these also contained no fish oil. Fishmeal replacement relied primarily on poultry meal, from up-cycled poultry trimmings. Fish oil replacement was achieved using natural marine algal oil, which contains high levels of two critical omega-3 fatty acids, DHA and EPA. A fishmeal and fish oil diet was used as a control, together with an additional commercial control diet. The fish were stocked into sixteen tanks for the comparative grow-out trial.

“This is the first time – to our knowledge – that fishmeal and fish oil have been totally eliminated from the diet of a marine carnivorous fish, with no deleterious consequences,” said Neil Anthony Sims, CEO of the Hawaii-based , where the trial was conducted. “Kampachi are a fast-growing, sashimi-grade fish, so this a significant breakthrough for the sustainability and scalability of marine fish farming.”

Aquaculture, the world’s fastest growing food sector, consumes more than 70 percent of the world’s fish oil and fishmeal, which are derived from forage fish like sardines, anchovies and menhaden. Roughly 20 percent of the global wild catch, or 18 million tonnes of fish each year, are converted into fishmeal and fish oil for use in animal feed.

The fish that were fed the zero fishmeal / zero fish-oil diet performed as well as the fish fed with the fishmeal and fish-oil diet. Performance was evaluated in terms of growth, feed conversion ratio (FCR), fillet yield and survival. FCR is the ratio of the amount of feed it takes to grow one kilogram of fish.

The fish fed the zero fishmeal / zero fish-oil diet also had a more desirable taste compared to the fish fed the commercially available control diet.

LOLS10在线直播下注“The results clearly show that algal oil can replace fish oil 100 percent without any reduction in growth of this marine fish,” said Rick Barrows, a fish nutrition expert with Aquatic Feed Technologies and co-principal investigator of the study.

The feed formulations used in this trial are available as open source formulae through the (F3 FIN) for anyone working to replace wild-caught fish ingredients in animal feed. F3 FIN encourages sustainable innovations in fish-free aquaculture feed ingredients by sharing experimental protocols, testing facilities and ingredient providers.

LOLS10在线直播下注Algae oils have been shown to contain twice the amount of EPA and DHA omega-3 fatty acids as fish oil, both of which are important for maintaining fish health and imparting heart and brain health benefits to humans.

“Development of diets that use these upcycled ingredients and microalgal oils is critical to the long-term scalability of marine fish culture, and therefore to our ability to sustainably feed a planet of nine billion people with heart-healthy seafood,” said Sims.

The project, titled “Developing cost-effective fishmeal-free and fish oil-minimized diets for high market value LOLS10在线直播下注 marine fish aquaculture,” was funded through NOAA’s Saltonstall-Kennedy Grant Program (NA18NMF4270208). The United States Department of Agriculture’s (LOLS10在线直播下注DA) Agricultural Research Service provided feed milling support for the trial. Anthropocene Institute and Ka'upulehu fishponds were collaborating partners on the NOAA grant.