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Item Metadata only The efficiency of aquatic plant systems for domestic wastewater treatment(Mahidol University. Mahidol University Library and Knowledge Center, 1997) Boonrod Sawatdiphanich; Sansanee Choowaew; Luepol Punnakanta; Uraiwan TontrakulrathItem Metadata only Accumulation and distribution of some heavy metals in water, sediment and aquatic plants in the canal system of Ratchaburi and Samut Songkhram provinces(Mahidol University. Mahidol University Library and Knowledge Center, 2006) Apinya Jantarawattana; Raywadee RoachanakananItem Metadata only Flow of nitrogen in the Snakeskin Gourami (Trichogaster pectoralis Regan) raising pond using material flow analysis at Samut Songkhram province(Mahidol University. Mahidol University Library and Knowledge Center, 2007) Uraiwan Saeuy; Raywadee RoachanakananItem Metadata only Accumulation of heavy metals in water, sediment and aquatic plants in Snakeskin Gourami fish raising pond at Amphawa district, Samut Songkhram province(Mahidol University. Mahidol University Library and Knowledge Center, 2006) Supanat Chalermsupanimit; Bunlur EmaruchiItem Metadata only Accumulation and distribution of heavy metals in water, sediment, Ipomoea aquatic Forsk. and Rhizophora apiculate Blum. in the Phi Lok canal system, Samut Songkhram provinces(Mahidol University. Mahidol University Library and Knowledge Center, 2006) Nopporn Lertprasert; Raywadee RoachanakananItem Metadata only Accumulation and distribution of some heavy metals in water, sediment and aquatic animals in the canal system of Ratchaburi and Samut Songkhram provinces(Mahidol University. Mahidol University Library and Knowledge Center, 2006) Chonthicha Atthabordee; Raywadee RoachanakananItem Metadata only Giant Salvinia (Salvinia molesta) as a substitutional source of protein in the kibble for freshwater herbivorous fish(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Thanamas Singkong; Kamalaporn Kanongdate; Chumlong Arunlertaree; Sansanee ChoowaewThis study aimed to develop kibble feed of Nile Tilapia (Oreochromis niloticus) and Thai silver barb (Barbodes gonionotus) by using Giant Salvinia (Salvinia molesta) as an additional source of protein instead of fish meal. Kibble feed of formula 1 (control) 2, 3, 4 and 5 contains proportion (in percentage) of S. molesta replacement of fish meal in feed formula 0, 25, 50, 75 and 100%, respectively. Nile Tilapia and Thai silver barb for this experiment had average weight 161 ± 14 g/fish and 8.61 ± 0.98 g/fish, respectively. An experiment was intensive culture and carried out in the cages in Maeklong River for three months. The results showed that average final weight and length, absolute growth rate (AGR) and feed conversion ratio (FCR) of Nile Tilapia fed with all formula were statistically significantly different (P<0.05). Average weight and length, AGR and FCR of Nile Tilapia fed with formula 2 had the closest to formula 1 (control), whereas specific growth rate (SGR) and survival rate (SR) were not significantly different (P>0.05) among formulas. The average final weight and length of Thai silver barb fed with all formula were statistically significantly different (P<0.05), average weight and length of Thai silver barb fed with formula 2 had the closest to formula 1 (control), whereas AGR, SGR, SR and FCR were not significantly different (P>0.05) among formulas. Water quality (water temperature, transparency, pH, hardness, alkalinity, DO, BOD, ammonia) in each cage of both for Nile Tilapia and Thai silver barb was in the suitable range of the standard of aquaculture. It is suggested according to the results that aquaculturist choose to consider applying fish feed mixed with S. molesta in three different criteria: (1) to consider the protein level in the kibble feed, (2) to consider the AGR and FCR, and (3) to consider the cost of production and break-even point. In this study, the results showed that fish feed formula 2 had the lowest break-even point; thus, it is recommended for culturing Nile Tilapia, but this experiment is not worth the investment for culturing Thai silver barb fingerlings, which may depend on the initial size of Thai silver barb, which is not suitable for the size of fish feed. Due to the small size of Thai silver barb, they feed on single cell algae and zooplankton. After all criteria for consideration, a proportion of 25% S. molesta of fish feed formula 2 is the most suitable to be used as a substitutional source of protein from fish meal for Nile Tilapia culture.Item Metadata only Factors influencing existence of artisanal fishing in Bandon Bay, Suratthani province(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Parkphoom Janpath; Kamalaporn Kanongdate; Chumlong Arunlertaree; Sansanee Choowaewgeneration to generation; (2) frequency of catching aquatic animals and (3) attitude about artisanal fishing conservation. External factors were (1) cancellaion of some local fishing equipment following the royal enactment in B.E. 2558; (2) waste water from... industries and (3) prosperity of aquatic animal resources. The results were statistical significantly at confedential level of at least 95%. In addition, there were statistical significant relationship among the internal factors as well as the externalItem Metadata only The valuation of use value and existence value of water onion (Crinum thaianum) in Ranong and Phang Nga provinces(Mahidol University. Mahidol University Library and Knowledge Center, 2016) Poonyawee Srisantear; Ratchaphong Klinsrisuk; Sansanee ChoowaewWater onion (Crinum thaianum), an endangered aquatic plant in Thailand, has been threatened severely which affects habitat loss, ecological service including income, food security as well as sentimental value of people. The focus of this study