Effect of Environmental Factors on the Growth of Microcystis aeruginosa (Cyanobacteria) in Agricultural Reservoirs

Kwon, O Chang; Chung, Gyu-Young; Lee, Jong-Eun; Seo, Eul-Won

doi:10.5352/jls.2011.21.8.1183

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…It has been suggested that HPND of mitten crabs might be occur in the high pH of water, massive aquatic plants, high abundant of cyanbacteria, fertilizers, crab feeding and hypoxia [2]. Ding et al [3] reported that infection of microsporidian Hepatospora eriocheir was associated with HPND, but animal regression test was not carried out.…”

Section: Introductionmentioning

confidence: 99%

Pathological Changes and Risk Factors of Hepatopancreas Necrosis Disease of Mitten Crab, Eriocheir Sinensis

Pan¹,

Song²,

Hu³

et al. 2017

Fish Aquac J

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Hepatopancreas necrosis disease (HPND) is a disease and serious impacts on the industry of Chinese mitten crabs (Eriocheir sinensis) culture, however the actual cause of this disease is still not known. In the present study, to explore the pathogenic changes and risk factors caused by HPND, ultrathin sections of different tissues from the diseased crabs were observed with transmission electron microscope. The hepatopancreatic cells, spermatogonium, gill tissues and muscle cells of the diseased crabs showed severe structural and morphological changes. To further investigate whether HPND was caused by pathogenic microorganism, the healthy crabs were fed/injected with diseased tissues, the symptoms of HPND were not found, suggesting that HPND was not caused by virus or microsporidian infections. In addition, the toxic effect of avermectin and high pH water were also examined in this study. 40% (p<0.01) crabs with HPND symptoms were found after breeding crabs in water with 9.5 pH to 10 pH for 14 days, but the crabs with no HPND symptoms were found when they were raised in water with different concentrations of avermectin. The results indicated that HPND was not caused by virus or microsporidian and might be induced by water of high pH value or other environmental factors.

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Section: Introductionmentioning

confidence: 99%

Pathological Changes and Risk Factors of Hepatopancreas Necrosis Disease of Mitten Crab, Eriocheir Sinensis

Pan¹,

Song²,

Hu³

et al. 2017

Fish Aquac J

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“…In contrast with other Korean eutrophic reservoirs with dominant Microcystis spp. (Kwon et al, ), dominant Cyanophyta species varied between seasons, and three species had similar relative densities of 25.0–98.5%. Moreover, Anabaena sp.…”

Section: Resultsmentioning

confidence: 96%

Application of an Algal Bloom Control Technique using Large Zooplankton Predators in An Eutrophic Agricultural Reservoir: A Preliminary Study

Nam

Lee

Chang

2016

Irrigation and Drainage

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Massive nuisance algal blooms are a primary concern for the management of eutrophic reservoirs. The effects of biomanipulation using trophic cascade effects in the aquatic food chain vary with the conditions of applied water bodies and are controversial. However, this mode of biomanipulation has long been considered an ecosystem‐friendly approach for the management of algal blooms. In the present study, herbivorous Daphnia similoides were artificially proliferated using a large culture system and were used to control algal blooms in a eutrophic agricultural reservoir. Introduced predators proliferated rapidly in the culture tanks, and high densities were subsequently sustained. Predators were then released into the reservoir at 1‐week intervals during early summer and autumn, and 84.4% algal removal efficiency was observed and mean values of chlorophyll a concentration decreased from 219 to 34.2 mg m−3 during the algal bloom period in autumn. However, no apparent effects were observed during early summer when fish predation and water temperatures were high. These data suggest that continuous release of predators from our culture facility efficiently facilitates early expansion of zooplankton populations and maintenance of their populations in the reservoir. The effects of introduced zooplankton may be maximized with concurrent management of resident zooplanktivorous fish. Copyright © 2016 John Wiley & Sons, Ltd.

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Characteristics of Aquatic Environment and Algal Bloom in a Small-scaled Agricultural Reservoir (Jundae Reservoir)

Nam¹,

Lee²,

Kim³

et al. 2013

Korean J. Environ. Biol.

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Effect of Environmental Factors on the Growth of Microcystis aeruginosa (Cyanobacteria) in Agricultural Reservoirs

Cited by 3 publications

References 13 publications

Pathological Changes and Risk Factors of Hepatopancreas Necrosis Disease of Mitten Crab, Eriocheir Sinensis

Pathological Changes and Risk Factors of Hepatopancreas Necrosis Disease of Mitten Crab, Eriocheir Sinensis

Application of an Algal Bloom Control Technique using Large Zooplankton Predators in An Eutrophic Agricultural Reservoir: A Preliminary Study

Characteristics of Aquatic Environment and Algal Bloom in a Small-scaled Agricultural Reservoir (Jundae Reservoir)

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