The effects of two fish species mullet,Mugil cephalus,and tilapia,Oreochromis niloticus,in polyculture with white shrimp,Litopenaeus vannamei,on system performances: A comparative study     

Manh N. Hoang  Phuoc N. Nguyen  Ana Maria Vital Estrocio Martins Bossier  Peter Bossier 《Aquaculture Research》2020,51(6):2603-2612

A comparative study was carried out to compare the effect of caging mullet and tilapia in a shrimp polyculture system. In six shrimp tanks (three tanks for each fish species), either mullet, Mugil cephalus (CCT‐SM), or tilapia, Oreochromis niloticus (CCT‐ST), was stocked in cages. In three other tanks, mullets were allowed to roam freely in shrimp tanks (D‐SM). White shrimp, Litopenaeus vannamei (0.50 g), was cultured as the predominant species were distributed randomly into nine fibreglass tanks (5 m³) at a density of 300 shrimp/tank, while fish (1.50 g) were stocked at the same density of 10% of the initial total shrimp biomass. The results showed that water quality parameters were not significantly different among treatments (p > .05), except for total suspended solids (TSSs). System performances based on parameters such as total weight gain (2,808.15 g/tank) and nutrient recovery were higher in D‐SM treatment (39.80% for nitrogen and 27.40% for phosphorus) than in CCT‐SM and CCT‐ST treatments (p < .05). These system performance parameters were significantly affected by the mullet‐holding strategy; however, they were not affected by fish species. The addition of mullet or tilapia in shrimp tanks did not affect shrimp growth differentially. Fish growth performances based on parameters such as final weight (98.43 g/fish) and DGR (1.29 g/day) were significantly higher in D‐SM treatment and were significantly different among D‐SM, CCT‐SM and CCT‐ST treatments (p < .05). It is concluded that in shrimp–fish polyculture with a stocking density of fish at 10% of the initial total shrimp biomass, tilapia is more effective than mullet, when caged. However, under free‐roaming conditions, the use of mullet is more effective in terms of system performances relative to a system holding caged tilapia.  相似文献   

The use of machine learning to predict acute hepatopancreatic necrosis disease (AHPND) in shrimp farmed on the east coast of the Mekong Delta of Vietnam     

Khiem  Nguyen Minh  Takahashi  Yuki  Oanh  Dang Thi Hoang  Hai  Tran Ngoc  Yasuma  Hiroki  Kimura  Nobuo 《Fisheries Science》2020,86(4):673-683

Fisheries Science - Predicting the outbreak of disease is essential when managing shrimp farms. Acute hepatopancreatic necrosis disease (AHPND) caused by Vibrio parahaemolyticus is a serious...  相似文献   

Reproductive cycle of yellow croaker <Emphasis Type="Italic">Larimichthys polyactis</Emphasis> in southern waters off Korea     

Han Kyu Lim  Minh Hoang Le  Cheul Min An  Sung Yeon Kim  Mi Seon Park  Young Jin Chang 《Fisheries Science》2010,76(6):971-980

The reproductive cycle and batch fecundity of yellow croaker Larimichthys polyactis were examined in 981 specimens (286 males, 695 females) caught from waters around Mokpo, Busan, and Jeju-do (Korea) between February 2008 and January 2009. Males and females with ripe-stage gonads were collected between April and June, at which time the mean gonadosomatic indices were also high, indicating that the spawning season of yellow croaker around the waters off southern Korea occurs from April to June. Degenerating postovulatory follicles as well as oocytes in the migratory-nucleus stage or hydrated stage were found in ripe-stage gonads, suggesting that this species can spawn repeatedly in a season. Batch fecundity in 45 females with migratory-nucleus or hydrated oocytes ranged from 19,396 to 106,311 eggs in fish varying from 20.0 to 26.7 cm in total length and was found to be positively related to total length and body weight. Our findings should assist in implementing a proper stock assessment of yellow croaker around the waters off Korea.  相似文献   

Spatial epidemiology of human anthrax in Son La province,Vietnam, 2003–2022     

Tan Luong  Tien Dung Nguyen  Van Truong Lu  Morgan C. Metrailer  Van Khang Pham  Thi Thu Ha Hoang  Thi Mai Hung Tran  Thanh Hai Pham  Thanh Long Pham  Quang Thai Pham  Jason K. Blackburn 《Zoonoses and public health》2024,71(4):392-401

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Hyperspectral remote sensing to detect leafminer‐induced stress in bok choy and spinach according to fertilizer regime and timing     

Hoang DD Nguyen  Christian Nansen 《Pest management science》2020,76(6):2208-2216

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Barley intake induces bile acid excretion by reduced expression of intestinal ASBT and NPC1L1 in C57BL/6J mice     

Hoang MH  Houng SJ  Jun HJ  Lee JH  Choi JW  Kim SH  Kim YR  Lee SJ 《Journal of agricultural and food chemistry》2011,59(12):6798-6805

To investigate the hypocholesterolemic mechanism of barley in vivo, six-week-old C57BL/6J mice were fed a high-fat diet (HFD) or high-fat diet containing barley (HFD-B) for seven weeks. Total and LDL cholesterol concentrations were significantly reduced in the HFD-B group while fecal cholesterol and bile acid was increased. Real-time PCR and immunoblot analysis revealed the induction of FXR expression, which in turn suppressed the expression of ASBT and NPC1L1 in the HFD-B group compared with the controls. In the liver, the expression of HMG-CoA reductase was significantly reduced while LDL receptor expression was unaltered in the HFD-B group compared with the controls. Our data suggest that the hypocholesterolemic effects of barley are primarily the result of reduced dietary cholesterol uptake and bile acid resorption. Reduced expression of intestinal ASBT and NPC1L1 may play a key role in the regulation of dietary cholesterol and bile acid metabolism in mice consuming a diet containing barley.  相似文献   

Characterisation of gastrointestinal helminths and their impact in commercial small-scale chicken flocks in the Mekong Delta of Vietnam     

Van  Nguyen T. B.  Cuong  Nguyen V.  Yen  Nguyen T.P.  Nhi  Nguyen T. H.  Kiet  Bach Tuan  Hoang  Nguyen V.  Hien  Vo B.  Thwaites  Guy  Carrique-Mas  Juan J.  Ribas  Alexis 《Tropical animal health and production》2020,52(1):53-62

Tropical Animal Health and Production - Commercial small-scale chicken farms managed as all-in-all-out but operating with low standards of hygiene/biosecurity are increasingly common in Vietnam....  相似文献   

Protective efficacy of phenoxyacetyl oxazolidine derivatives as safeners against nicosulfuron toxicity in maize     

Yuan‐Yuan Zhang  Shuang Gao  Minh‐Tu Hoang  Zi‐Wei Wang  Xin Ma  Yue Zhai  Na Li  Li‐Xia Zhao  Ying Fu  Fei Ye 《Pest management science》2021,77(1):177-183

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Cytotoxic prenylated flavonoids from Morus alba     

Nguyen Tien Dat  Phung Thi Xuan Binh  Le Thi Phuong Quynh  Chau Van Minh  Hoang Thanh Huong  Jung Joon Lee 《Fitoterapia》2010,81(8):1224-1227

A phytochemical fractionation of the methanol extract of the Morus alba leaves led to the isolation of eleven flavonoids (1–11). The structure of the new 3′-geranyl-3-prenyl-2′,4′,5,7-tetrahydroxyflavone (1) was elucidated by means of spectroscopic methods. The cytotoxicity of the isolated compounds against human cervical carcinoma HeLa, human breast carcinoma MCF-7, and human hepatocarcinoma Hep3B cells was evaluated. Of note, morusin (9) was the most potent with an IC₅₀ value of 0.64 μM against HeLa cells.  相似文献   

Pathogenicity of Stemphylium lycopersici isolated from rotted tobacco seeds on seedlings and leaves     

Daisuke Kurose  Long H. Hoang  Naruto Furuya  Minoru Takeshita  Toyozo Sato  Seiya Tsushima  Kenichi Tsuchiya 《Journal of General Plant Pathology》2014,80(2):147-152

A preemergence damping-off of tobacco (Nicotiana tabacum L.) was found in Fukuoka, Japan, in 2009. A fungus repeatedly isolated from the black-rotted seeds reproduced the symptoms in tobacco seeds, and the preemergence damping-off developed after flower and soil inoculation with the fungus. Brown spots and blight developed on leaves of tobacco seedlings after inoculation with the isolate. The fungus was reisolated from the rotted seeds and blighted leaves. The causal fungus was identified as Stemphylium lycopersici based on morphology and phylogenetic analysis. This is the first report to confirm the pathogenicity of S. lycopersici in tobacco in the world.  相似文献