Accumulation of microcystins in water and economic fish in Phayao Lake, and fish ponds along the Ing River tributary in Chiang Rai, Thailand

Whangchai, Niwooti; Wanno, Suthida; Gutierrez, Redel; Kannika, Korntip; Promna, Rattapoom; Iwami, N.; Itayama, Tomoaki

doi:10.4236/as.2013.45b010

Cited by 7 publications

(7 citation statements)

References 11 publications

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“…When season changes combine with other environmental factors, harmful cyan blooms occur. In Thailand, MC accumulation was found in prawn farms [ 89 , 90 ], fish ponds [ 90 , 91 , 92 ], and recreational reservoirs [ 93 , 94 ], especially in the temperate region of the country with high N and P concentrations. In contrast, the reports of STX from Thailand were associated with only freshwater puffers [ 95 , 96 ].…”

Section: Discussionmentioning

confidence: 99%

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

Naknaen

Ratsameepakai

Suttinun

et al. 2021

Toxins

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The Songkhla Lake Basin (SLB) located in Southern Thailand, has been increasingly polluted by urban and industrial wastewater, while the lake water has been intensively used. Here, we aimed to investigate cyanobacteria and cyanotoxins in the SLB. Ten cyanobacteria isolates were identified as Microcystis genus based on16S rDNA analysis. All isolates harbored microcystin genes, while five of them carried saxitoxin genes. On day 15 of culturing, the specific growth rate and Chl-a content were 0.2–0.3 per day and 4 µg/mL. The total extracellular polymeric substances (EPS) content was 0.37–0.49 µg/mL. The concentration of soluble EPS (sEPS) was 2 times higher than that of bound EPS (bEPS). The protein proportion in both sEPS and bEPS was higher than the carbohydrate proportion. The average of intracellular microcystins (IMCs) was 0.47 pg/cell on day 15 of culturing, while extracellular microcystins (EMCs) were undetectable. The IMCs were dramatically produced at the exponential phase, followed by EMCs release at the late exponential phase. On day 30, the total microcystins (MCs) production reached 2.67 pg/cell. Based on liquid chromatograph-quadrupole time-of-flight mass spectrometry, three new MCs variants were proposed. This study is the first report of both decarbamoylsaxitoxin (dcSTX) and new MCs congeners synthesized by Microcystis.

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Section: Discussionmentioning

confidence: 99%

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

Naknaen

Ratsameepakai

Suttinun

et al. 2021

Toxins

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“…Microcystins have also been detected in wild and commercially-raised marine and estuarine mussels ( Mytilus trossulus ) from Puget Sound, Washington, D.C., U.S.; Nile tilpaia ( Oreochromis nitoticus ) from Chian Rai, Thailand; and other aquatic foods intended for human consumption [ 26 , 27 , 28 ]. Routine seawater and aquatic animal monitoring in areas where cyanotoxins have been found could provide early that warning that animal and human shellfish consumers could be at risk.…”

Section: Example Animal Sentinel Systems and Eventsmentioning

confidence: 99%

“…Recent research demonstrated that microcystins can accumulate in freshwater fish. For example, microcystins were detected in both fresh water samples and fish in aquaculture ponds in Thailand [ 26 ]. In the mid-2000s, the Nature Conservancy began restoring the Williamson River Delta Preserve in Oregon, USA with the goal of regenerating habitats essential for the survival of the endangered Lost River sucker ( Deltistes luxatus ), and short-nose sucker ( Chasmistes brevirostris ) [ 45 ].…”

Section: Example Animal Sentinel Systems and Eventsmentioning

confidence: 99%

Sentinel Animals in a One Health Approach to Harmful Cyanobacterial and Algal Blooms

Backer

Miller

2016

Veterinary Sciences

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People, domestic animals, and wildlife are all exposed to numerous environmental threats, including harmful algal blooms (HABs). However, because animals exhibit wide variations in diet, land use and biology, they are often more frequently or heavily exposed to HAB toxins than are people occupying the same habitat, making them sentinels for human exposures. Historically, we have taken advantage of unique physiological characteristics of animals, such as the sensitivity of canaries to carbon monoxide, to more quickly recognize threats and help protect human health. As HAB events become more severe and widespread worldwide, exposure and health outcome data for animals can be extremely helpful to predict, prevent, and evaluate human exposures and health outcomes. Applying a One Health approach to investigation of HABs means that lessons learned from animal sentinels can be applied to protect people, animals and our shared environment.

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“…Livestock effluent from the basin and sewage discharges from the city is likely the major pollution sources. These significant sources of nutrients, especially nitrogen and phosphorus, contribute to the eutrophication of the lake [2]. Eutrophication leads to algal blooms and subsequently to taste and odor compounds, geosmin and 2-methylisoborneol (MIB) production, reducing the application of the lake water for drinking and contaminating aquatic animals.…”

Section: Introductionmentioning

confidence: 99%

“…Eutrophication leads to algal blooms and subsequently to taste and odor compounds, geosmin and 2-methylisoborneol (MIB) production, reducing the application of the lake water for drinking and contaminating aquatic animals. Moreover, hepatotoxin microcystin formation in Phayao Lake was also implicated with algal blooms [2].…”

Section: Introductionmentioning

confidence: 99%

Study of Geosmin and 2-Methylisoborneol (MIB) Producers in Phayao Lake, Thailand

Whangchai¹,

Pimpimon²,

Sompong³

et al. 2017

IJBBB

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This study aimed to investigate geosmin and 2-methylisoborneol (MIB)-producing cyanobacteria and actinomycetes as sources of earthy-musty odours in Phayao Lake, northern Thailand. Known earthy-musty odour producers, Lyngbya sp., Phormidium sp., Anabaena sp. and Oscillatoria sp., were found as the dominant genera of cyanobacteria in the lake water.  Odour-producing Streptomyces spp. were also found to be significantly present in the lake sediment where majority of Streptomyces spp. (63%) isolated were geosmin-producers. The significant density of actinomycetes, particularly Streptomyces, suggests that they played as important contributor to the production of geosmin and MIB in the lake.

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Accumulation of microcystins in water and economic fish in Phayao Lake, and fish ponds along the Ing River tributary in Chiang Rai, Thailand

Abstract: ABSTRACT

Cited by 7 publications

References 11 publications

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

Microcystis Sp. Co-Producing Microcystin and Saxitoxin from Songkhla Lake Basin, Thailand

Sentinel Animals in a One Health Approach to Harmful Cyanobacterial and Algal Blooms

Study of Geosmin and 2-Methylisoborneol (MIB) Producers in Phayao Lake, Thailand

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