Tilapia diseases and management in river-based cage aquaculture in northern Thailand

Chitmanat, Chanagun; Lebel, Phimphakan; Whangchai, Niwooti; Promya, Jongkon; Lebel, Louis

doi:10.1080/10454438.2015.1104950

Cited by 47 publications

(37 citation statements)

References 19 publications

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“…Women and men had very similar perceptions of the causes of disease overall, but women were significantly more likely than men to perceive heavy rainfall, a climate‐related risk, as important for disease outbreaks (Chitmanat et al . ). Significant and relatively larger gender differences were also found for financial risks such as high interest rates, repaying loans, high feed, and low fish prices.…”

Section: Risk Perceptionmentioning

confidence: 97%

Gender and the management of climate‐related risks in Northern Thailand

Lebel¹,

Lebel²,

Lebel³

2014

Int Social Sci J

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In much past research on the sustainability of natural resource management, gender was either ignored or women were essentialised as care‐takers or victims. Recent programmes on disaster risk reduction and adaptation to climate change seem to be retracing these myths. There is a need for more critical research on how gender influences the experience and management of climate‐related risks. This paper draws on a set of earlier studies to explore the influences of gender on climate risk management by farming households in northern Thailand. We find that women fish farmers perceived greater climate‐related risks to profits, and this corresponded with attaching greater importance to risk management practices at the farm and community levels. Women and men crop farmers had very similar perceptions of changing drought risks. Research on the roles of women in community‐level water management, and gendered social norms suggest that it will be more difficult for women to reduce risks to their farms at the larger, collective, scales than it is for men. This study shows that gender can influence risk‐taking and decision‐making and therefore should be taken into account when strengthening climate risk management practices or designing adaptation interventions.

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Section: Risk Perceptionmentioning

confidence: 97%

Gender and the management of climate‐related risks in Northern Thailand

Lebel¹,

Lebel²,

Lebel³

2014

Int Social Sci J

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“…However, fish cultured in floating cages in river are exposed to multiple pathogens such as bacteria, parasites, fungi and viruses (Dong et al, ). Previous research has shown that massive mortality in river‐based cage farms caused by poor water quality and fish diseases are the main obstacles to the development of tilapia cage culture, while mortality in pond fish culture has been rarely mentioned (Chitmanat, Lebel, Whangchai, Promya, & Lebel, ; Lebel, Lebel, & Chuah, ). Streptococcus spp.…”

Section: Introductionmentioning

confidence: 99%

Phenotypic and genotypic characterization of Streptococcus spp. isolated from tilapia (Oreochromis spp.) cultured in river‐based cage and earthen ponds in Northern Thailand

Niu

Khattiya

Zhang

et al. 2020

Journal of Fish Diseases

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Streptococcus spp. are major pathogenic bacteria associated with massive mortality in tilapia. This study investigated the phenotypic and genotypic characterization of Streptococcus agalactiae (GBS) and Streptococcus iniae (S. iniae) isolated from tilapia in river-based floating cage and earthen pond farms in northern Thailand. Isolates were identified by biochemical and molecular analyses. Capsular typing, enterobacterial repetitive intergenic consensus polymerase chain reaction and multilocus sequence typing were performed to investigate the genetic relatedness. Six and one isolates were confirmed as GBS and S. iniae, respectively. All Streptococcus spp. isolates were obtained from 4 river-based cage farms (4/33), while samples collected from earthen pond farms (N = 28) were negative for streptococcosis. All GBS with serotype Ⅲ and sequence type (ST) 283 was observed. The β-haemolytic GBS isolates were resistant to five antimicrobials, while the S. iniae was susceptible to all antimicrobials. This study indicates both GBS and S. iniae are the major bacterial pathogens responsible for streptococcosis infection in farmed tilapia of northern Thailand with GBS as dominant species. This survey highlights that the river-based cage farms seriously impact on the healthy development of the tilapia industry. K E Y W O R D Searthen pond farm, northern Thailand, river-based cage farm, Streptococcus spp., tilapia ACK N OWLED G EM ENTS

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“…This is because it is this region where farmers reported to have experienced fish mortalities in their farms. One of the most common methods for managing diseases on fish farms is the application of antibiotics (Chitmanat et al., 2016). It was observed from this study that the majority of fish farmers didn't know any method of managing, and controlling fish diseases while few of them mentioning antibiotics as one of the methods.…”

Section: Discussionmentioning

confidence: 99%

Phenotypic and molecular detection of Aeromonads infection in farmed Nile tilapia in Southern highland and Northern Tanzania

Mzula

Wambura

Mdegela

et al. 2019

Heliyon

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Aeromonads disease outbreaks are now becoming a common phenomenon in freshwater farmed fish worldwide. In Tanzania, the aquaculture field is increasingly growing save to sustain food protein demand and strengthen household income. To avoid losses that tilapia fish farmers might account, information on magnitude of infection and characteristics of the aetiological agent is vital. This study aimed to establish the prevalence of aeromonads infection in farmed tilapia and assess pond and fish health management practices. A cross sectional study was carried out between February 2017 and October 2018 and a total of 816 whole fish samples were aseptically collected from 32 ponds in Ruvuma, Mbeya, Iringa and Kilimanjaro regions. During sampling, water quality parameters were taken and questionnaires to assess the knowledge of farmers were also provided. Isolation and identification of bacteria was conducted using conventional biotyping and molecular techniques. A total of 201 (80.4%) of 250 isolates that were conventionally identified were confirmed to be aeromonads by amplification of 820 bp rpoD gene, making the overall prevalence of 24.6% (201, n = 816). Sequencing of rpoD gene and phylogenetic analysis revealed two aeromonads species, Aeromonas hydrophila and Aeromonas veronii . To the best of our knowledge this is the first report to establish the prevalence of aeromonads in apparently healthy farmed tilapia in Southern highlands and Northern zone of Tanzania. In addition it was observed that farmers were lacking proper knowledge and awareness on pond management practices and fish health management. In conclusion, the infection rate of aeromonads in apparently health tilapia coupled with lack of proper knowledge and awareness on pond and fish health management by fish farmers in the study area poses risk of diseases outbreaks in their farms in future. Therefore, it is recommended that the farmers should be trained on basic pond and fish health management and control strategies.

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Tilapia diseases and management in river-based cage aquaculture in northern Thailand

Cited by 47 publications

References 19 publications

Gender and the management of climate‐related risks in Northern Thailand

Gender and the management of climate‐related risks in Northern Thailand

Phenotypic and genotypic characterization of Streptococcus spp. isolated from tilapia (Oreochromis spp.) cultured in river‐based cage and earthen ponds in Northern Thailand

Phenotypic and molecular detection of Aeromonads infection in farmed Nile tilapia in Southern highland and Northern Tanzania

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