منابع مشابه
New technologies for increasing the production of ornamental fish
In recent years, world trade in ornamental fish has grown significantly. Southeast Asia industry use this potential to export these species to other countries. Considering the importance of ornamental fish, attempting to produce more marketable fish is one of the goals of ornamental fish breeders. In this regard, new methods such as coloring for producing the best fish variety, sex change aimed...
متن کاملMarine larval fish production: a nutritional perspective
Introduction Many of the marine species that are currently being produced on a commercial basis are members of the group of fishes known as pelagic spawners. The reproductive strategy employed by these fishes involves the production of large numbers of small, buoyant eggs which, after being released into the water and fertilized, drift freely in surface currents with no further parental attenti...
متن کاملFloating faeces for a cleaner fish production
Recent developments in European recirculating aquaculture systems suggest expanding potential for this extremely water-efficient technique. However, the technology still faces challenges due to concerns over economic efficiency and system stability—both essential in minimizing the risk of financially and environmentally expensive failures. One key factor in maintaining stable production conditi...
متن کاملGlobal fish production and climate change.
Current global fisheries production of approximately 160 million tons is rising as a result of increases in aquaculture production. A number of climate-related threats to both capture fisheries and aquaculture are identified, but we have low confidence in predictions of future fisheries production because of uncertainty over future global aquatic net primary production and the transfer of this ...
متن کاملProduction of tetrodotoxin in puffer fish embryos.
It has been accepted that puffer fish accumulates tetrodotoxin through the food chain. This indicates that tetrodotoxin in puffer fish is exogenous. The present study, however, describes an endogenous origin of tetrodotoxin in puffer fish. For this purpose, the ovulated oocytes from puffer fish Fugu niphobles were artificially fertilized and cultivated. The toxin levels of embryos increased gra...
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ژورنال
عنوان ژورنال: Nature
سال: 1968
ISSN: 0028-0836,1476-4687
DOI: 10.1038/219660c0