Histological changes in the gills of<i>Clarias gariepinus</i>(Teleostei: Clariidae) from a polluted South African urban aquatic system

Dyk, JC van; Marchand, M. J.; Pieterse, G. M.; Barnhoorn, I.E.J.; Bornman,

doi:10.2989/ajas.2009.34.3.10.986

Cited by 38 publications

(30 citation statements)

References 20 publications

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“…The pharynx is a major site through which waterborne pollutants can enter the body, and gills are the organs most affected by such compounds (Mallat 1985). Epithelial lifting (oedema), hyperplasia of mucous and gill epithelial cells, vacuolation of epithelial cells, lamellar fusion and branching were some of the histological alterations identified in the gills of C. gariepinus sampled from a South African urban aquatic system (van Dyk et al 2009b). Most of these alterations, however, are regarded as reversible, should exposure to the stressor cease (van Dyk et al 2009b).…”

Section: Discussionmentioning

confidence: 99%

“…The sharptooth catfish Clarias gariepinus (Burchell 1822) has been widely used as an indicator species of aquatic ecosystem health ( Barnhoorn et al 2004, Marchand et al 2008, van Dyk and Pieterse 2008, Marchand et al 2009, van Dyk et al 2009a, 2009b, Huchzermeyer et al 2011. Clarias gariepinus occurs in most aquatic ecosystems in the woodland-savanna zones of the Afrotropical region, from the Nile to as far south as the Orange and Umtamvuna river systems, and is an important aquaculture and angling species.…”

Section: Introductionmentioning

confidence: 99%

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A comparative assessment of the health status of feral populations ofClarias gariepinusfrom three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol

Madanire-Moyo

Luus‐Powell

Jooste

et al. 2012

African Journal of Aquatic Science

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An evaluation of the health status of feral populations of the freshwater catfish Clarias gariepinus was carried out between 2009 and 2010 at three dams in the Limpopo and Olifants river systems with varying levels of human impact. Fish health was assessed using a modified health assessment index (HAI) protocol, with the inclusion of the inverted parasite index (IPI) and condition factor (K). These biomonitoring tools provide relatively simple and rapid indications of how well fish are coping in their environment. To verify the biomonitoring results, water quality analyses were included in the study. The nutrients and mining-related pollutants in the three dams differed to a great extent and showed an increasing trend in the order: Luphephe-Nwanedi Dams < Flag Boshielo Dam < Return Water Dam. The HAI score varied across the three sampling sites, with individual mean values of 93.3, 84 and 42.7 at the Return Water Dam, Flag Boshielo Dam and Luphephe-Nwanedi Dams, respectively. The top six metrics that correlated best with fish health scores were the levels of ectoparasites, haematocrit values and the condition of the gills, liver, skin and fins. Although the HAI successfully differentiated among the three localities, which differed in water quality, it was non-specific in response to contaminants. Notably, the premise set forth by the IPI that endoparasites increase with a decrease in water quality was not supported.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A comparative assessment of the health status of feral populations ofClarias gariepinusfrom three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol

Madanire-Moyo

Luus‐Powell

Jooste

et al. 2012

African Journal of Aquatic Science

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“…Hypotrophy of both primary and secondary lamellae along with disorganization of gill rakers was also evident. Structural organization changes in the histological structure of gill treated fish may be well associated with circulatory disturbance along with the regressive changes [57]. The gills are used to assess the effect of pollutant and the aquatic medium.…”

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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“…A semi-quantitative histological assessment was done using the method of van Dyk et al (2009b), adapted from Bernet et al (1999). In order to classify the organ index results, any histological alterations identified were assessed and classified using the van Dyk et al The developmental stages of the testes and ovaries were determined according to criteria defined in the Biomonitoring of Environmental Status and Trends program (BEST) (Schmitt and Dethloff 2000).…”

Section: Histologymentioning

confidence: 99%

“…Fish are useful as bio-indicator organisms because of their relatively high position in the food chain, their longevity, and because species are easily identifiable. Various studies on the histology of C. gariepinus have identified the potential of this species as an indicator of aquatic ecosystem health: Marchand et al (2009) and van Dyk et al (2009b) identified liver and gill histological alterations, respectively, in C. gariepinus inhabiting two polluted dams (reservoirs) in an urban nature reserve. Van Dyk et al (2012) also reviewed liver histopathology of C. gariepinus from various freshwater ecosystems and showed that the liver histopathology of this species can be a useful biomarker of aquatic pollution.…”

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confidence: 99%

Health of sharptooth catfishClarias gariepinusin Pongolapoort Dam, South Africa: a comprehensive study

McHugh

Smit

Vuren

et al. 2013

African Journal of Aquatic Science

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A histology-based fish health assessment protocol was used in 2009-2010 to assess the health status of Clarias gariepinus from Pongolapoort Dam, South Africa. Nineteen fish were collected by angling. The histology of liver, kidney, gills and testes or ovaries was semi-quantitatively assessed and compared to that of fish from a reference site in the Okavango Panhandle, Botswana. Necropsy observations indicated that C. gariepinus from Pongolapoort Dam were in poorer condition than those from the Okavango Panhandle. Microscopic analysis showed that the mean liver index (I L ), gill index (I G ), testis index (I T ) and ovary index (I O ) were higher, although not statistically significant, in fish from the Okavango Panhandle. The difference in the results between the necropsy-based observations and semi-quantitative histological results was due to the external abnormalities detected in the necropsy analysis, including parasites and skin lesions, not expressing as changes to cell and tissue structure. According to the parameters measured, C. gariepinus from Pongolapoort Dam were in a healthy state.

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Histological changes in the gills ofClarias gariepinus(Teleostei: Clariidae) from a polluted South African urban aquatic system

Cited by 38 publications

References 20 publications

A comparative assessment of the health status of feral populations ofClarias gariepinusfrom three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol

A comparative assessment of the health status of feral populations ofClarias gariepinusfrom three dams in the Limpopo and Olifants river systems, Limpopo province, South Africa, using the fish health assessment index protocol

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

Health of sharptooth catfishClarias gariepinusin Pongolapoort Dam, South Africa: a comprehensive study

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