A5020904006- Aquaculture disease management and microbiota
- Aquaculture Nutrition and Growth
- Parasitic Infections and Diagnostics
- Coccidia and coccidiosis research
- Parasite Biology and Host Interactions
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Helminth infection and control
- Vibrio bacteria research studies
- Aquatic life and conservation
- Viral Infections and Vectors
- Fish biology, ecology, and behavior
- Toxoplasma gondii Research Studies
- Invertebrate Immune Response Mechanisms
- Animal Virus Infections Studies
- Identification and Quantification in Food
- Physiological and biochemical adaptations
- Bacteriophages and microbial interactions
- Viral gastroenteritis research and epidemiology
- Marine Ecology and Invasive Species
- Reproductive biology and impacts on aquatic species
- Aquatic Ecosystems and Phytoplankton Dynamics
- Pharmaceutical and Antibiotic Environmental Impacts
- Wildlife Ecology and Conservation
- interferon and immune responses
James Cook University Singapore
2021-2024
Murdoch University
2011-2018
Department of Primary Industries and Regional Development
2018
Agri-Food and Veterinary Authority of Singapore
2003-2008
DAO Diseases of Aquatic Organisms Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsSpecials 53:1-9 (2003) - doi:10.3354/dao053001 Characterization a novel ranavirus isolated from grouper Epinephelus tauvina Q. W. Qin1,2,*, S. F. Chang3, G. H. Ngoh-Lim3, Gibson-Kueh3, C. Shi1, T. J. Lam1,2 1Tropical Marine Science Institute and 2Department Biological Sciences, The National University Singapore, 10 Kent Ridge...
Asian seabass (Lates calcarifer) is a major aquaculture food fish species in Singapore. Farming of this increasingly threatened by frequent outbreaks infectious diseases, resulting mortality exceeding 50–70%. In study, we investigated the comparative gut bacterial microbiota using 16S rRNA metasequencing between asymptomatic and diseased juvenile collected during disease outbreak soon after stocking. Mild to severe chronic granulomatous enteritis was observed histopathologically both fish....
This is the first pathological description of 'scale drop syndrome' (SDS) in Asian seabass, Lates calcarifer Bloch. Cumulative mortality was estimated at 40-50%. The vasculitis all major organs including skin and associated tissue necrosis distinctive. dermis overlying scale beds often necrotic with loss. Necrosis splenic ellipsoids, renal glomeruli choroid rete glands eye were further hallmarks a disease systemic vascular involvement. brain not spared damage, resulting multifocal...
Marine farming of barramundi ( Lates calcarifer ) in Southeast Asia is currently severely affected by viral diseases. To better understand the biological implications and gene expression response commercial conditions during a disease outbreak, presence pathogens, comparative RNAseq, histopathology targeting multiple organs clinically “sick” “healthy” juveniles were investigated. Coinfection scale drop virus (SDDV) L. herpes (LCHV) detected all sampled fish, with higher SDDV loads sick than...
Diseases caused by pathogens commonly occurring in the aquatic environment or those that are non-host specific prevalent and threaten rapid growth of tropical aquaculture. This study investigates causes mortality 12 batches newly stocked juvenile Lates calcarifer from three different hatcheries. Cytology based on Diff-Quik™-stained tissue blood smears provides diagnosis possible mortality, while histopathology haematology provide a better understanding how prolonged transport fish with...
SUMMARY Currently, the systematics, biology and epidemiology of piscine Cryptosporidium species are poorly understood. Here, we compared Sanger ‒ next-generation sequencing (NGS), , at 18S rRNA actin genes. The hosts comprised 11 ornamental fish species, spanning four orders eight families. objectives were: to (i) confirm rich genetic diversity parasite high frequency mixed infections; (ii) explore potential NGS in presence complex mixtures. By sequencing, main genotypes were obtained locus,...
Abstract A systemic iridoviral disease associated with high mortality was initially recognized in cultured mullet, Mugil cephalus L., and tiger grouper, Epinephelus fuscoguttatus Forsskal, by histopathology transmission electron microscopy. Polymerase chain reaction performed on tissues viral isolates, using four published primer sets developed for the Red Sea bream iridovirus (RSIV). An indirect fluorescent antibody test also virus‐infected ATCC gruntfin (GF) seabass, Lates calcarifer...
Abstract ‘Big belly’ disease is a chronic, granulomatous bacterial enteritis and peritonitis, first reported in 3‐ to 4‐week‐old Asian seabass or barramundi, Lates calcarifer Bloch fry. Affected fry are emaciated have swollen abdomen, the condition referred as ‘skinny pot‐belly’ ‘big disease. In this study, histopathological examinations of diseased fish from batch 2‐month‐old, 6‐ 8‐cm L. fingerlings, kept seawater recirculating aquaculture systems, showed pathology resembling Ethanol‐fixed...
This study establishes the blood reference intervals (RIs) for clinically healthy and farmed juvenile Asian seabass (Lates calcarifer), within 4-6 weeks after stocking into flow-through, marine aquaculture systems. The 90% percentile RIs (n = 156, mean bodyweight 41.8 g) are as follows: glucose (GLU) 2.4-11.3 mmol/L, haematocrit (Hct) 18.9%-39.2%, haemoglobin concentration (Hb) 56.0-85.0 g/L, total plasma protein (TPP) 56.0-77.0 red cell (RBC) count 4.1-11.2 × 1012 /L, white (WBC) 5.3-69.9...
The bacterium Edwardsiella ictaluri is considered to be one of the most significant pathogens farmed catfish in United States America and has also caused mortalities wild fishes many other parts world. E. not believed present fish populations Australia, although it previously been detected imported ornamental held quarantine facilities. In an attempt confirm freedom from Australian native fishes, we undertook a risk-based survey catfishes 15 sites across northern Australia. was by selective...
Barramundi, Lates calcarifer, are protandrous hermaphrodites where individuals first sexually mature as male at 3−5 years of age, before reorganizing gonadal tissue to change female several later when they reach around 70 cm in total length (∼4−5 kg). However, recent anecdotal evidence suggests that populations farmed Singapore, this sex may be occurring much earlier than previously recorded, thus posing challenges for hatcheries select and maintain fish breeding purposes. This study...
Abstract This is a study of vertebral deformities in ornamental koi based on computed radiography and skeletons cleaned by dermestid beetles ( Dermestes maculatus ). All developed gradual onset swimming abnormalities as adults. Extensive intervertebral osteophyte formation correlated with age fish was associated hindquarter paresis one koi. Vertebral compression fusion were the most common spinal occurring at multiple sites, similar to findings other farmed fish. Site‐specific thought...
Very little is known about the diversity, prevalence, or pathogenicity of haematozoa in Australian freshwater fishes. Blood smears from 189 native catfishes, six different species, northern Australia were examined for haematozoa. Haematozoan infections observed only fishes Queensland, at an overall prevalence 0.191 (95% CI = 0.134–0.265). Intraerythrocytic haemogregarines present Neoarius graeffei Brisbane River a 0.35 (0.181–0.567). Trypanosomes Tandanus species four rivers, prevalences...