A5005254912- Aquaculture disease management and microbiota
- Parasite Biology and Host Interactions
- Animal Virus Infections Studies
- Environmental Toxicology and Ecotoxicology
- Pharmaceutical and Antibiotic Environmental Impacts
- Fish Ecology and Management Studies
- Toxic Organic Pollutants Impact
- Myxozoan Parasites in Aquatic Species
- Bird parasitology and diseases
- Vibrio bacteria research studies
- Aquaculture Nutrition and Growth
- Gut microbiota and health
- Marine Bivalve and Aquaculture Studies
- Yersinia bacterium, plague, ectoparasites research
- Bacteriophages and microbial interactions
- Pesticide Residue Analysis and Safety
- Fish Biology and Ecology Studies
- Helminth infection and control
- Effects and risks of endocrine disrupting chemicals
- interferon and immune responses
- Identification and Quantification in Food
- Genomics and Phylogenetic Studies
- Antimicrobial Peptides and Activities
- Cancer-related molecular mechanisms research
- Turtle Biology and Conservation
The University of Sydney
2022-2025
Commonwealth Scientific and Industrial Research Organisation
2019-2023
Agriculture and Food
2019-2023
The University of Melbourne
2014-2019
Universidad Mayor
2010-2013
Temperatures regulate metabolism of marine ectotherms and thereby influence development, reproduction, and, as a consequence, dispersal. Despite the importance water temperatures in epidemiology diseases, for parasitic copepod Lepeophtheirus salmonis, effect high low has not been methodically investigated. Here, we examined effects wide temperature range (3–20 °C) on L. salmonis larval adult body size, reproductive outputs, infestation success. Further, tested if dispersal salmon lice...
Abstract The aquaculture sector is currently experiencing a global disease crisis. Emerging bacterial diseases—often opportunistic or syndromic—have collapsed production in nations across the world. Losses shrimp industry associated with Vibrio spp. exceed 40% of capacity. This paper reviews potential drivers syndromic diseases involving pathogens affecting aquaculture. We provide key examples from major industries where such conditions have prompted greater antibiotic use and resulted...
Abstract BACKGROUND Salmon lice ( Lepeophtheirus salmonis ) are the most important parasites of farmed salmon. Infective larvae position themselves in upper part water column to increase encounter probabilities with potential hosts. Previous studies have shown that a ‘snorkel’ sea‐cage technology protects salmon from infection surface waters. We tested whether deep snorkels would more effectively reduce infestation than shallow and still uphold adequate conditions for fish. Five sea‐cages...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 11:181-190 (2019) - DOI: https://doi.org/10.3354/aei00303 Effects of step salinity gradients on salmon lice larvae behaviour and dispersal T. Crosbie1, D. W. Wright2, F. Oppedal2, I. A. Johnsen2, Samsing1,3, Dempster1,* 1Sustainable Laboratory—Tropical Temperate (SALTT), School BioSciences, University...
Tenacibaculosis remains a major health issue for number of important aquaculture species globally. On the west coast Canada, yellow mouth (YM) disease is responsible significant economic loss to Atlantic salmon industry. While Tenacibaculum maritimum considered be primary agent clinical YM, impact YM on resident microbial community and their influence oral cavity poorly understood. Using 16s rRNA amplicon sequencing analysis, present study demonstrates dysbiosis reduction in diversity...
Abstract Vibrio species are an emerging public and animal health risk in marine environments the opportunistic bacterial pathogen harveyi is a major disease for tropical aquaculture. Current understanding of virulence V. limited by strain-specific variability complex host-pathogen dynamics. This study sought to integrate genomic investigation, phenotypic characterisation vivo challenge trials barramundi ( Lates calcarifer) increase our virulence. We identified two hypervirulent isolates,...
ABSTRACT Salovirus is a genus within the family Caliciviridae , which contains single member species, nordlandense also known as Atlantic salmon calicivirus (ASCV). While previous work has shown that ASCV can replicate in fish cell lines and establish systemic infection vivo, its exact role disease remains unclear very little about geographic distribution evolution among salmon. To expand phylogenetic range of better understand potential disease, we screened publicly available transcriptomes...
Abstract Background The development, progression, and dissemination of antimicrobial resistance (AMR) are determined by interlinked human, animal, environmental drivers, which pose severe risks to human livestock health. Conjugative plasmid transfer drives the rapid AMR among bacteria. In addition judicious use implementation stewardship programs, mitigating spread antibiotic requires an understanding dynamics microbial communities, as well role various taxa potential reservoirs that promote...
ABSTRACT Flavobacterium covae is one of four spp. causing columnaris disease in teleost fish. Here, we present the draft genome a new isolate, FC5-24/06, which first reported from Australia.
Striped catfish (Pangasianodon hypophthalmus) farming in the Mekong Delta of Vietnam holds global significance with over a million tonnes produced annually at substantial export value. However, geographic concentration and intensity has led to disease-related losses, underreported concerns disease control from farmers. This study employs qualitative methodology gain insightful perspectives Vietnamese striped farmers on industry challenges health management practices. Thematic saturation was...
Abstract Fish meal (FM) replacement is essential for the sustainable expansion of aquaculture. This study focussed on feasibility replacing FM with a single‐cell protein (SCP) derived from methanotrophic bacteria ( Methylococcus capsulatus , Bath) in barramundi fry Lates calcarifer ). Three isonitrogenous and isoenergetic diets were formulated 0%, 6.4% 12.9% inclusion SCP, by 25% 50%. Barramundi (initial body weight 2.5 ± 0.1 g) fed experimental 21 days to assess growth performance, gut...
AEI Aquaculture Environment Interactions Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 6:81-89 (2014) - DOI: https://doi.org/10.3354/aei00118 High host densities dilute sea lice Lepeophtheirus salmonis loads on individual Atlantic salmon, but do not reduce infection success Francisca Samsing1,*, Frode Oppedal2, David Johansson2, Samantha Bui1, Tim Dempster1,3 1Sustainable Laboratory...
Most diseases in aquaculture are caused by opportunistic pathogens. One of them, Vibrio harveyi, is a widespread Gram-negative bacterium that has become an important pathogen aquatic species marine environments. Here, we propose the use causal pie model as framework to conceptualize causation vibriosis juvenile barramundi (Lates calcarifer) and establish effective challenge model. In model, sufficient cause, or pie, constellation component causes lead outcome (e.g. vibriosis). pilot study,...
Abstract Hydrogen peroxide (H 2 O ) is a commonly used treatment for range of parasitic diseases marine finfish, including amoebic gill disease (AGD). While this partially effective at reducing parasite load, H can have detrimental effects on the host under certain conditions. Treatment temperature and dose concentration are two factors that known to influence toxicity ; however, their impact outcome AGD remains unclear. Here, we investigated (8, 12 or 16°C) (750, 1,000, 1,250 mg/L) efficacy...
Pilchard orthomyxovirus (POMV) is an emerging pathogen of concern to the salmon industry in Australia. To explore molecular events that underpin POMV infection, we challenged Atlantic (Salmo salar) post-smolts seawater via cohabitation. Tissue samples head kidney and liver were collected from moribund surviving individuals analyzed using transcriptome sequencing. Viral loads higher compared liver, yet presented more upregulated genes. Fish infected with showed a strong innate immune response...
Hydrogen peroxide (H2 O2 ) baths are widely used to reduce numbers of salmon lice on farmed Atlantic salmon. Fish mortalities often occur after baths, with warmer temperatures increasing lethality. We tested whether mortality could be reduced and removal efficacy maintained by lowering bath relative ambient temperatures. Post-smolt infected were held at 10, 13 or 16 °C, treated 1.5 g/L H2 for 20 min equal lower 7, 10 °C.Salmon decreased as decreased. No occurred when fish °C 7 °C. For the...
An orthomyxo-like virus was first isolated in 1998 as an incidental discovery from pilchards Sardinops sagax collected waters off the South Australian coast. In following 2 decades, viruses have been healthy Australia and Tasmania. 2006, also farmed Atlantic salmon Salmo salar Tasmania during routine surveillance and, again, 2012 onwards diseased salmon. Using transmission electron microscopy, these were identified belonging to family Orthomyxoviridae. To further characterise viruses,...