Effects of Microcystis cells, cell extracts and lipopolysaccharide on drinking and liver function in rainbow trout Oncorhynchus mykiss Walbaum

Best, Jappe H. de; Eddy, F. B.; Codd, Geoffrey A.

doi:10.1016/s0166-445x(03)00105-x

Cited by 65 publications

(26 citation statements)

References 32 publications

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“…McDonald and Wood, 1998;Bucking and Wood, 2004;Bucking and Wood, 2005), and which is thought to represent the rate of osmotic water entry in a non-feeding fish (Hickman, Jr and Trump, 1969;Wood, 1995). By 12·h, the water flux into the stomach chyme had amounted to about 16·ml·kg ), which is also believed to be inversely proportional to size, with small rainbow trout fry drinking the most (Fuentes and Eddy, 1997;Best et al, 2003).…”

Section: Discussionmentioning

confidence: 99%

Water dynamics in the digestive tract of the freshwater rainbow trout during the processing of a single meal

Bucking

Wood

2006

Journal of Experimental Biology

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Section: Discussionmentioning

confidence: 99%

Water dynamics in the digestive tract of the freshwater rainbow trout during the processing of a single meal

Bucking

Wood

2006

Journal of Experimental Biology

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“…Microcystin slows protein synthesis by inhibiting protein phosphatase 1 and 2A and promotes tumor formation and cancer in fish tissue (Fischer & Dietrich, 2000;van der Oost et al, 2003). Microcystin can increase heart rate and produce osmoregulatory imbalance by stimulating drinking in adults which makes fish more susceptible to toxins in the environment, including microcystin (Best et al, 2001(Best et al, , 2003. Recent research suggests microcystins also cause oxidative stress in fish by reducing the production of antioxidants and increasing lipid peroxidation in liver, kidney, and gill tissue (Bláha et al 2004;Prieto et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Initial impacts of Microcystis aeruginosa blooms on the aquatic food web in the San Francisco Estuary

Lehman¹,

et al. 2009

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The impact of the toxic cyanobacterium Microcystis aeruginosa on estuarine food web production in San Francisco Estuary is unknown. It is hypothesized that Microcystis contributed to a recent decline in pelagic organisms directly through its toxicity or indirectly through its impact on the food web after 1999. In order to evaluate this hypothesis, phytoplankton, cyanobacteria, zooplankton, and fish were collected biweekly at stations throughout the estuary in 2005. Concentrations of the tumor-promoting Microcystis toxin, microcystin, were measured in water, plankton, zooplankton, and fish by a protein phosphatase inhibition assay, and fish health was assessed by histopathology. Microcystis abundance was elevated in the surface layer of the western and central delta and reached a maximum of 32 9 10 9 cells l -1 at Old River in August. Its distribution across the estuary was correlated with a suite of phytoplankton and cyanobacteria species in the surface layer and 1 m depth including Aphanizomenon spp., Aulacoseira granulata, Bacillaria paradoxa, Rhodomonas spp., and Cryptomonas spp. Shifts in the phytoplankton community composition coincided with a decrease in the percentage of diatom and green algal carbon and increase in the percentage of cryptophyte carbon at 1 m depth. Maximum calanoid and cyclopoid copepod carbon coincided with elevated Microcystis abundance, but it was accompanied by a low cladocera to calanoid copepod ratio. Total microcystins were present at all levels of the food web and the greater total microcystins concentration in striped bass than their prey suggested toxins accumulated at higher trophic levels. Histopathology of fish liver tissue suggested the health of two common fish in the estuary, striped bass (Morone saxatilis), and Mississippi silversides (Menidia audens), was impacted by tumor-promoting substances, particularly at stations where total microcystins concentration was elevated. This study suggests that even at low abundance, Microcystis may impact estuarine fishery production through toxic and food web impacts at multiple trophic levels.

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“…The increase of the activity of Na + -K + -ATPase is an adaptive mechanism to balance the increased uptake of Na + uptake in the fresh water medium [52]. The intake of water is increased to several folds during stress conditions in freshwater fishes especially in polluted water [53]. Disruption of ATPase enzyme inhibits the uptake of Na + and ClGills are responsible for regulating the exchange of salt and water even a slight structural damage can render a fish very vulnerable to osmoregulatory as well as respiratory difficulties.…”

Section: Discussionmentioning

confidence: 99%

Ecotoxicology of Green Synthesized Silver Nanoparticles on Fresh Water Fish Mystus Gulio

Abirami

Jose

Govindarajulu

et al. 2017

Int J Pharm Pharm Sci

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Objective: Nanotechnology an advanced tool to synthesis atomic level particles. Increased application of silver nanoparticles results in the bioaccumulation of these particles in the environment. The biological effect of the green synthesized silver nanoparticles on the fresh water cat fish ws studied in the present study.Methods: Asystasia gangetica leaf extract was used to synthesize silver nanoparticles, the particles were characterized by scanning electron microscopy. Fifteen days after the introduction of fishes into the medium containing AgNPs, the fishes were sacrificed and the tissues were processed for biochemical and histological studies. Na + -K + Results:The results observed in the present study reveals a marked difference in the level of carbohydrate in the muscle tissue from 48.338±0.320 to 22.747±1.837 µg/100 mg wet tissue followed by gills and liver with 41.21% and 25.48% decrease. Total protein content was decreased from 649.094±1.429 to 491.56±0.925 µg/mg wet tissues. The drastic increase in the total lipids was observed in liver tissue of treated fishes from 0.240±0.004 to 0.408±0.005 mg/gm wet tissue. Na -ATPase was estimated using LeBel method. Estimation of carbohydrate was done by the Phenol-sulphuric acid method. Total protein was estimated using Lowry's method, Sulpho-Vanilline method was used to estimate the total lipids. + -K + Conclusion:The plant-mediated synthesized AgNPs shows a potential toxic effect on all the tissues studied; changes were observed in the normal architecture of tissues as well as in the biochemical parameters. To understand the mechanism of toxicity of these particles further studies at the molecular level has to be carried out.-ATPase activity of liver tissue increased from 0.153±0.001 to 0.225±0.003 in the liver tissue of treated fishes, followed by muscles and gills with 33.61% and 35% of the increase in the activity. Marked changes in the structure of gills with degenerated primary gill lamellae, necrosis, hyperplasia and fused primary lamellae were evident in experimental group. Necrosis, vacuolization, disintegrated nucleus and blood sinusoids were observed in liver tissues. Disintegration of myofibrils was evident in AgNP treated group of fishes.

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Effects of Microcystis cells, cell extracts and lipopolysaccharide on drinking and liver function in rainbow trout Oncorhynchus mykiss Walbaum

Cited by 65 publications

References 32 publications

Water dynamics in the digestive tract of the freshwater rainbow trout during the processing of a single meal

Water dynamics in the digestive tract of the freshwater rainbow trout during the processing of a single meal

Initial impacts of Microcystis aeruginosa blooms on the aquatic food web in the San Francisco Estuary

Ecotoxicology of Green Synthesized Silver Nanoparticles on Fresh Water Fish Mystus Gulio

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