The diversity of aquatic resources in Thi Nai Lagoon decreased due to the lack of harmonious use and integrated long-term planning on the use of living resources.There remained a lack of mechanisms and regulations for...The diversity of aquatic resources in Thi Nai Lagoon decreased due to the lack of harmonious use and integrated long-term planning on the use of living resources.There remained a lack of mechanisms and regulations for coordination of activities in the lagoon by Binh Dinh Provincial People’s Committee(PPC).The aim of the study was to investgate the aquatic species and water quality in Thi Nai Lagoon,Vietnam.Data were collected at 23 different points on Thi Nai Lagoon,with three replicates at each point.There were 106 species of fish presented on the lagoon and in different sizes,including 17 mollusc species and 15 crustaceans species.In the dry season,there were 167 phytoplankton species in five divisions,10 classes in 39 orders in 59 families including 77 genus.Zooplankton had eight chordata in 10 classes of 18 orders including 44 families,64 genus and 102 species.Arthropoda had the largest number of species,78 species,accounting for 76.5%of total species.In the rainy season,only 48 species of Arthropoda,Cnidaria,Annelida,Chaetognatha and Rotifer were affected and some were not encountered in the wet season,such as mollusca and chordata.While water quality variables were still good for aquaculture,within permitted limits of TCVN standard and criteria,there were still problems caused by production discharges and living activities of inhabitants around the lagoon,such as sedimentary matters.展开更多
Infection of Escherichia coli in piglets is identified as one of major problems in pig husbandry.Data were collected from different experiments conducted at farm levels and results showed that the percentage of piglet...Infection of Escherichia coli in piglets is identified as one of major problems in pig husbandry.Data were collected from different experiments conducted at farm levels and results showed that the percentage of piglets infected with E.coli was very high.E.coli infected healthy piglets were up to 48.9%and E.coli infected diarrhea piglets accounted for 88.3%.Using Betel Bokashi and antibiotics in treatment brings about different results.Out of 48 infected piglets,15 piglets were selected for three groups treatment with five each group.Results showed that 92.3%diarrhea piglets treated with Betel Bokashi recovered in 3.85 d,while 100%and 88.23%treated with antibiotics were cured in 4 d and 4.01 d,respectively.Post-treatment piglets in group 3 grew up faster than group 1 and group 2,with gains 231,218 and 212 g,respectively.展开更多
Terapon jarbua was collected from Tam Giang-Cau Hai lagoon systems and then their reproductive performances were investigated.Total 342 species were caught by otter trawlers and different fishing gears in marine and T...Terapon jarbua was collected from Tam Giang-Cau Hai lagoon systems and then their reproductive performances were investigated.Total 342 species were caught by otter trawlers and different fishing gears in marine and Tam Giang-Cau Hai lagoon systems on certain days of each month during period from September 2015 to August 2016 at fishing port.The determination of age was based on composition of the fish:ear,scaly,spine,gill cover and spine and the ovarian histology template.The gonads after being fixed with Bouins solution were cleansed,cut,dyed and put on the observation microscope.Results showed that the sex of Terapon jarbua was nearly clarified at the approximately 1+age group and participated in reproduction process in the first time at the 1+age group.The batch and relative fecundity of Terapon jarbua were high.The batch fecundity of Terapon jarbua varied from 239,029 to 420,400 eggs.The relative fecundity capacity fluctuated from 945 to 1,013 of eggs per gram of fish and the mean value by 981 eggs per gram of fish.The spawning season of fish occurred from March to May annually.展开更多
文摘The diversity of aquatic resources in Thi Nai Lagoon decreased due to the lack of harmonious use and integrated long-term planning on the use of living resources.There remained a lack of mechanisms and regulations for coordination of activities in the lagoon by Binh Dinh Provincial People’s Committee(PPC).The aim of the study was to investgate the aquatic species and water quality in Thi Nai Lagoon,Vietnam.Data were collected at 23 different points on Thi Nai Lagoon,with three replicates at each point.There were 106 species of fish presented on the lagoon and in different sizes,including 17 mollusc species and 15 crustaceans species.In the dry season,there were 167 phytoplankton species in five divisions,10 classes in 39 orders in 59 families including 77 genus.Zooplankton had eight chordata in 10 classes of 18 orders including 44 families,64 genus and 102 species.Arthropoda had the largest number of species,78 species,accounting for 76.5%of total species.In the rainy season,only 48 species of Arthropoda,Cnidaria,Annelida,Chaetognatha and Rotifer were affected and some were not encountered in the wet season,such as mollusca and chordata.While water quality variables were still good for aquaculture,within permitted limits of TCVN standard and criteria,there were still problems caused by production discharges and living activities of inhabitants around the lagoon,such as sedimentary matters.
文摘Infection of Escherichia coli in piglets is identified as one of major problems in pig husbandry.Data were collected from different experiments conducted at farm levels and results showed that the percentage of piglets infected with E.coli was very high.E.coli infected healthy piglets were up to 48.9%and E.coli infected diarrhea piglets accounted for 88.3%.Using Betel Bokashi and antibiotics in treatment brings about different results.Out of 48 infected piglets,15 piglets were selected for three groups treatment with five each group.Results showed that 92.3%diarrhea piglets treated with Betel Bokashi recovered in 3.85 d,while 100%and 88.23%treated with antibiotics were cured in 4 d and 4.01 d,respectively.Post-treatment piglets in group 3 grew up faster than group 1 and group 2,with gains 231,218 and 212 g,respectively.
文摘Terapon jarbua was collected from Tam Giang-Cau Hai lagoon systems and then their reproductive performances were investigated.Total 342 species were caught by otter trawlers and different fishing gears in marine and Tam Giang-Cau Hai lagoon systems on certain days of each month during period from September 2015 to August 2016 at fishing port.The determination of age was based on composition of the fish:ear,scaly,spine,gill cover and spine and the ovarian histology template.The gonads after being fixed with Bouins solution were cleansed,cut,dyed and put on the observation microscope.Results showed that the sex of Terapon jarbua was nearly clarified at the approximately 1+age group and participated in reproduction process in the first time at the 1+age group.The batch and relative fecundity of Terapon jarbua were high.The batch fecundity of Terapon jarbua varied from 239,029 to 420,400 eggs.The relative fecundity capacity fluctuated from 945 to 1,013 of eggs per gram of fish and the mean value by 981 eggs per gram of fish.The spawning season of fish occurred from March to May annually.
