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Effect of Some Commercial Feed Additives on the Structure of Gonads and Microbiology of Nile Tilapia
Tilapia is a popular food fish all over the world and in Egypt it has been raised as food for human consumption for a long time. A field study was conducted on brood stock Nile tilapia Oreochromis niloticus to improve their reproductive performance by...
Maturation and Spawning in Fish
Both male and female gonads undergo marked cyclic morphological and histological changes before reaching full maturity and becoming ripe. This is called maturation of the gonads, writes Professor Nihar Ranjan Chattopadhyay,West Bengal University of Animal...
Efficacy of Anthelmintic Drugs and Traditional Chinese Medicinal Plant Extracts to Control Dactylogyrus Vastator
Disease caused by Dactylogyrus vastator has resulted in considerable economic damage in aquaculture, write Xiao P. Zhang et al, Chinese Academy of Sciences. ...
Decline in Kelp in West Europe
Kelp ecosystems form widespread underwater forests playing a major role in structuring the biodiversity at a regional scale. Some seaweeds such as Laminaria digitata are also economically important, being exploited for their alginate and iodine content....
Potential Fish Species in Amazonia for National Aquaculture
Amazonian fish resources are a huge source of food for inhabitants of the basin and some commercial species have shown a potential of developing sustainable aquaculture systems, writes Luis Gabriel Quintero Pinto1 Laboratorio de IctiologĂ­a, FMVZ- UN...
Spiny Lobster Farming in Viet Nam and the Role of Probiotics During Production
Among the seven spiny lobster species found in the waters off Vietnam, Panulirus ornatus, P. homarus and P. polyphagus have been selected for farming because of demand, high prices and abundance of wild seeds, write Nguyen Thi Bich Thuy, Research Institute...
Multivariate Evaluation of Effectiveness of Treatment Efficacy of Cypermethrin Against Sea Lice in Atlantic Salmon
Lepeophtheirus salmonis is a major ectoparasite pathogen of farmed Atlantic salmon (Salmo salar) in the Northern Hemisphere. Sea lice infestations have a detrimental effect on health, production and market value of fish. The ecological impact on intensive...
Plastic for Dinner? Observations of Frequent Debris Ingestion by Pelagic Predatory Fishes from the Central North Pacific
There have been numerous reports of plastic debris accumulation in surface waters of the central North Pacific Subtropical Gyre. Further, incidences have been reported of plastic ingestion by different marine organisms, including seabirds and small planktivorous...
Comparative Genomics Reveals that Edwardsiella Tarda has Acquired the Locus of Enterocyte Effacement Through Horizontal Gene Transfer
Edwardsiella tarda is an enterobacterium which causes edwardsiellosis, a fatal disease of cultured fishes such as red sea bream, eel and flounder. Preventing the occurrence of E. tarda infection has thus been an important issue in aquaculture. E. tarda...
Inflammatory Responses in Primary Muscle Cell Cultures in Atlantic Salmon
The relationship between fish health and muscle growth is critical for continued expansion of the aquaculture industry. The effect of immune stimulation on the expression of genes related to the energy balance of fish is poorly understood,write Nicholas...
Ingested Plastic Transfers Hazardous Chemicals to Fish and Induces Hepatic Stress
Plastic debris litters aquatic habitats globally, the majority of which is microscopic (< 1 mm), and is ingested by a large range of species. Chelsea M. Rochman et al, University of California, US, show that fish, exposed to a mixture of polyethylene...
Marine Cage Culture and the Environment: Twenty-first Century Science Informing a Sustainable Industry
Technological innovation has made it possible to grow marine finfish in the coastal and open ocean. Along with this opportunity comes environmental risk. As a federal agency charged with stewardship of the nation’s marine resources, the National Oceanic...
Experimental and Natural Warming Elevates Mercury Concentrations in Estuarine Fish
Marine food webs are the most important link between the global contaminant, methylmercury (MeHg), and human exposure through consumption of seafood. Jennifer A. Dijkstra et al, Wells National Estuarine Research Reserve, US, look at how warming temperatures...
Meeting Food and Nutrition Needs of the Poor: Role of Fish and Opportunities/Challenges of Aquaculture
People who are food and nutrition insecure largely reside in Asia and Sub-Saharan Africa and for many, fish represents a rich source of protein, micronutrients and essential fatty acids. The contribution of fish to household food and nutrition security...
Bluegill Sunfish Production in Missouri
The bluegill (Lepomis macrochirus) is a species of freshwater fish that is native to a large region of North America, from Quebec to Northern Mexico. The species is a popular sport fish and a member of the sunfish family (Centrarchidae), which is also...
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