Isolation, identification and characteristics of Aeromonas sobria from diseased rainbow trout (Oncorhynchus mykiss)

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 15

Published: Jan. 7, 2025

Aeromonas sobria is an opportunistic pathogen that can infect humans, animals and aquatic species, which widely distributed in different environments products. In recent years, with the rapid expansion of intensive aquaculture, disease caused by A. has occurred. This study aims to understand pathogenic characteristics provide scientific basis for prevention control epidemic. The dominant strain As012 was isolated from diseased rainbow trout during outbreak. Through physiological biochemical experiments, sequencing phylogenetic tree analysis 16S rRNA gyrB genes, identified as sobria. clinical signs experimental infection were consistent those farm, LD50 1.0 × 106.6 CFU/mL. histopathological lesions gills, heart, liver, spleen intestines mainly extensive hemorrhage. addition, eight virulence genes screened As012, including Act, Aer, AexT4, Alt, ahyB, ascV, Nuc Hly. grow environment pH 1-11, temperature 8-43°C NaCl concentration 0-8%. drug sensitivity results showed it resistant 12 antibiotics penicillin G, vancomycin, clindamycin, highly sensitive 16 cefazolin, ciprofloxacin, furadantin. sobria, trout, main causing epidemic farm. a very wide range growth strong pathogenicity, widespread hemorrhaging various tissues trout. It multi-resistant, but cephalosporins, quinolones, nitrofurans sulfonamides. Among them, ciprofloxacin will be one effective preventing controlling Chinese aquaculture.

Language: Английский

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The economic costs of invasive aquatic plants: A global perspective on ecology and management gaps

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 908, P. 168217 - 168217

Published: Nov. 10, 2023

Language: Английский

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Future-proofing the emergency recovery plan for freshwater biodiversity

Environmental Reviews, Journal Year: 2023, Volume and Issue: 32(3), P. 350 - 365

Published: June 19, 2023

Freshwater biodiversity loss is accelerating globally, but humanity can change this trajectory through actions that enable recovery. To be successful, these require coordination and planning at a global scale. The Emergency Recovery Plan for freshwater aims to reduce the risk six priority actions: (1) accelerate implementation of environmental flows; (2) improve water quality sustain aquatic life; (3) protect restore critical habitats; (4) manage exploitation species riverine aggregates; (5) prevent control nonnative invasions in (6) safeguard connectivity. These implemented using future-proofing approaches anticipate future risks (e.g., emerging pollutants, new invaders, synergistic effects) minimize likely stressors make conservation more resilient climate other challenges. While uncertainty with respect past observations not concern biodiversity, has distinction accounting conditions have no historical baseline. level unprecedented. Future-proofing will anticipating changes developing implementing address those changes. Here, we showcase successful local case studies examples. Ensuring response options within are future-proofed provide decision makers science-informed choices, even face uncertain potentially conditions. We an inflection point loss; learning from defeats successes support improved toward sustainable future.

Language: Английский

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The global social-economic dimension of biological invasions by plankton: Grossly underestimated costs but a rising concern for water quality benefits?

Water Research, Journal Year: 2022, Volume and Issue: 222, P. 118918 - 118918

Published: July 28, 2022

Language: Английский

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Comprehensive risk assessment of algae and shellfish in the middle route of South-to-North Water Diversion Project

Environmental Science and Pollution Research, Journal Year: 2022, Volume and Issue: 29(52), P. 79320 - 79330

Published: June 16, 2022

Language: Английский

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The Microbial Community Composition and Nitrogen Cycling Metabolic Potential of an Underground Reservoir in Rizhao, Shandong Province, China

Water, Journal Year: 2024, Volume and Issue: 16(4), P. 573 - 573

Published: Feb. 15, 2024

Constructing underground reservoirs has emerged as a crucial strategy to address the shortage of fresh water in Rizhao, Shandong Province, China. However, quality, microbial community composition, and biogeochemical cycling nutrients compared raw remain unknown. To unveil characteristics structures their nitrogen metabolic potential coastal reservoirs, we utilized functional gene array (GeoChip 5.0) conjunction with high-throughput sequencing 16S rRNA 18S genes. Our findings indicate that quality reservoir exhibits certain degree eutrophication water, higher concentrations TN, TP, NO3−N, NO2−-N, Chl a, but lower DO NH4+-N. The alpha diversity bacterial microeukaryotic communities was significantly reservoir. presented stronger correlation environmental factors than community. Regarding relative abundance communities, Gammaproteobacteria dominated while Alphaproteobacteria water. Additionally, Nitrospirae noticeably Moreover, found sequence archaea Thaumarchaeota Furthermore, our analysis revealed that, except for amoA gene, which increased nitrification, other genes reduced. This reduction may contribute concentration NH4+-N study provides comprehensive understanding reservoirs. It serves valuable reference source selection, formulation assurance measures, construction management subsequent impounding.

Language: Английский

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Future invasion risk assessment of the peacock bass in Neotropical ecoregions: a conceptual and testable model

Global Ecology and Conservation, Journal Year: 2024, Volume and Issue: unknown, P. e03227 - e03227

Published: Sept. 1, 2024

Language: Английский

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Mapping the global distribution and predicting the potential expansion of Ceratium (Dinophyceae): development of an interactive platform

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 3, 2024

Ceratium is a genus of freshwater dinoflagellates distributed worldwide and considered invasive in several aquatic systems around the world. This study introduces global database documenting species that includes 677 records published from 1881 to 2023, 42 new ones. These encompass large part vast bibliography surrounding described 1793, or under its basionym Bursaria 1773. To visualize these along with associated environmental information, we developed an interactive updatable web platform named "Ceratium Tracker" (https://hjqcwk-mica-milano.shinyapps.io/CeratiumTracker/). As South America had highest number recent records, calculated expansion rate modeled potential distribution this region, focusing on most frequent species: C. furcoides hirundinella. We found hirundinella lesser magnitude compared furcoides, but invasion started earlier. Within just decade, 2002 2012, rapidly expanded range, invading approximately 70% America. Our analysis showed minimum temperature soil moisture were variables influencing America, while actual evapotranspiration was key for Consequently, areas susceptible primarily located Brazil’s coastal region neighboring countries. In contrast, susceptibility concentrated western Argentina Chile, consistent preferences obtained our analyses.

Language: Английский

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Towards effective management of the marine-origin Prymnesium parvum (Haptophyta): A growing concern in freshwater reservoirs?

Harmful Algae, Journal Year: 2023, Volume and Issue: 129, P. 102513 - 102513

Published: Sept. 22, 2023

Language: Английский

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First report of the invasive Ceratium furcoides (dinoflagellate) in Paracambi Reservoir, Rio de Janeiro: Risks to the world's largest domestic water treatment plant

Lakes & Reservoirs Science Policy and Management for Sustainable Use, Journal Year: 2022, Volume and Issue: 27(2)

Published: March 26, 2022

Abstract Ceratium furcoides (Dinophyta) have gained international attention as invasive aquatic species, especially in South America, due to its fast proliferation into various systems and the subsequent adverse impacts on water quality native biota. The present study reports detection of dense populations C . Paracambi Small Hydropower Plant (SHP) located Guandu River basin. Sampling was conducted at five sites during two sampling events 2019 2020 different seasons (spring summer), respectively. We used standardized methods, including surface collections (SS) (100‐ml) traditionally for quantitative analysis inland phytoplankton, well filtration 20‐L sub‐surface (FS) through a zooplankton net. cell densities were higher SS (599 individuals/ml) than FS (0.068 individuals/ml), possibly indicating patchy distribution layers. total length exhibited high values (mean 249‐μm; mean width 67‐μm), accounting treatment impairment, an inability consume them and/or fish gill clogging. This new observation within extensively investigated area, source nine million people, advocates integrated samplings that also consider search cysts accumulated bottom sediments, more detailed spatial temporal investigations considering salient features ’ populations.

Language: Английский

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