The Problem and Its Setting
Tourists all over the world travel because it is their way for them to experience relaxation, leisure, entertainment and adventure. They also travel because of other business purposes; they want to explore new things, and to gain more knowledge about different cultures and history of the other countries. But they also travel to other countries to try different varieties of food that can be seen all over the world. According to Samonte, Giselle P.B., et. al in 1994 among the economically important bivalves, the green mussel (Perna viridis are predominantly being farmed in the Philippines. Oyster and mussel farms in Southern Luzon region have increased because of the need for supplementary sources if income brought about by the dwinding catch of small-scale fishermen. “Tahong” is a tagalog term for Mussels (Perna viridis) which is a bivalve belonging to the family Mytilidae. It is harvested for food but is also known to harbor toxins and cause damage to submerge structures such as drainage pipes. It is a native in the Asia-pacific region but has been introduce in the Caribbean, and in the waters around Japan, North America, and South America. Mussels are among the many invertebrates under the Phylum Mollusca. Their wide distribution in the coastal areas of the Indo-Pacific region makes them the most easily gathered seafood organisms, contributing a significant percentage to the world marine bivalve production. In the Philippines, approximately 12,000 MT of mussels were produced in 1987. This amount consisted only of farmed green mussel. Perna vindis, and not the brown mussels which are exclusively gathered from natural beds. In the wild, mussels are mostly found in the littoral zone, attached in clusters on various substrates. Being a filter-feeder of phytoplankton and detritus. It is considered the most efficient converter of nutrients and organic matter, produced by marine organisms in the aquatic environment, into palatable and nutritious animal protein. It’s very short food chain (one link only), sturdy nature, fast growth rate and rare occurrence of catastrophic mass mortalities caused by parasitic micro-organisms, makes it possible to produce large quantities at a very reasonable price (Korringa, 1976). Likewise, its ability to attach to substrates with the byssus, makes it an ideal aquaculture species using different culture systems. According to Bardach et al. (1972), mussel culture is the most productive form of saltwater aquaculture and its proliferation is virtually a certainty. Background of the Study
The Asian Green Mussel also called as “tahong” in the Philippines has separate sexes and fertilizes externally. There are a very few functional hermaphrodites. The mussels sexual development was shown to be affected by temperature. Spawning ordinarily occurs twice a year between early spring and late autumn; however, the mussels found in the Philippines and Thailand are known to spawn all year round. The zygote transforms to a larva 7-8 hours after fertilization. The larvae stay in the water column for 10-12 days before undergoing metamorphosis into a juvenile and setting onto a surface. The juveniles become sexually mature when they are 15-30 mm. in length, a size reached within 2-3 months. Growth is influenced by the availability of food, temperature, water movement, mussel’s age, and caging. Cage culturing can prevent entry of predators and barnacles increases marketability but slows down the mussel’s growth rate. The adult can live up to 2-3 years. Due to its fast growth, it can outcompete other fouling organisms and cause changes in marine ecological relationships. It is harvested in the Philippines as food source because of its fast growth and then sold in supermarkets and local market in the Philippines. It is rich in vitamins, minerals, protein and carbohydrates. . It can be prepared and served in different ways such as tinolang tahong, adobong...
References: Agard, E. et al. 1992.
http://ohiostatepress.org/watters%20freshwater.pdf Banzon, F. 2010.
http://www.pinotbusiness.com/aqua-business/mussel-production-and culture Benson, O
http://www.doc.govt.nz/Documents/scienceandtechnical/ musselfarmsol.pdf Samonte, G. et al. 1994.
http://repository.seafdec.org.ph/handle/10862/264 Solidium, J
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