Catfish Clarias

Catfish (Clarias batrachus) plasma vitellogenin levels were significantly decreased after 48 hours of exposure to 0.0015 mg/L of commercial-grade endosulfan (Chakravorty et al. 1992). Levels did not recover substantially with injections of various hormones, including estradiol. In rainbow trout, endosulfan did not induce vitellogenin production at 9 days after a single intraperitoneal injection of 5 mg/kg in peanut oil (Andersen et al. 1999). 

Chakravorty S, Lai B, Singh TP. 1992. Effect of endosulfan (thiodan) on vitellogenesis and its modulation by different hormones in the vitellogenic catfish Clarias batrachus. Toxicology 75 191-198. 

Hilmy AM, El Domiaty NA, Daabees AY, Moussa FI. 1987. Short-term effects of mercury on survival, behaviour, bioaccumulation and ionic pattern in the catfish Clarias lazera). Comp Biochem Physiol C 87 303-308. 

African sharp-tooth catfish, Clarias gariepinus South Africa 1988-89 metals-contaminated lake (sediments 216 mg Cu/kg DW) ... 

Bezuidenhout, L.M., H.J. Schoonbee, and L.P.D. de Wet. 1990. Heavy metal content in organs of the African sharptooth catfish, Clarias gariepinus (Burchell), from a Transvaal lake affected by mine and industrial effluents. Part 1. Zinc and copper. Water SA (Pretoria) 16 125-129. 

Zebrafish, Brachydanio rerio Embryo-larvae Catfish, Clarias batrachus No deaths <2.0 16... 

Catfish, Clarias batrachus adults Methylmercury LC50 (96 h) 430 18... 

Kirubagaran, R. and K.P. Joy. 1988. Toxic effects of three mercurial compounds on survival, and histology of the kidney of the catfish Clarias batrachus (L.). Ecotoxicol. Environ. Safety 15 171-179. 

Zinc added to the ambient water depressed copper accumulations in tissues of juvenile catfish (Clarias lazera), but copper added to the medium depressed zinc uptake (Hilmy et al. 1987b). A similar situation was reported in barnacles (Elminus modestas) however, simultaneous exposure to copper and zinc resulted in enhanced uptake of both metals (Elliott et al. 1985). 

Mukhopadhyay, P.K., A.P. Mukherji, and P.V. Dehadrai. 1982. Certain biochemical responses in the air-breathing catfish Clarias batrachus exposed to sublethal carbofuran. Toxicology 23 337-345. 

Lamai, S.L., Warner, G.F., and Walker, C.H. Effects of dieldrin on life stages of the African catfish, Clarias gariepinus (Burchell), Ecotoxicol. Environ. Saf., 42(l) 22-29, 1999. 

Kirubagaran R, Joy KP (1994) Effects of short-term exposure to methylmercury chloride and its withdrawal on serum levels of thyroid hormones in the catfish Clarias batrachus (L). Bull Environ Contam Toxicol 63 166-170... 

Resink, J. W., Schoonen, W. E. G. J., Albers, P. C., etal. (1989a). The chemical nature of sex attracting pheromones from the seminal vesicle of the African catfish, Clarias gariepinus. Aquaculture 83, 137-151. 

African sharptooth catfish, Clarias gariepinus, age 4-8 years. South Africa, 1988-1989, lake sediments contained 1104 mg Zn/kg DW (595-Brain Fat Gill... 

The African catfish (Clarias gariepinus) is native to subtropical Africa but is now cultured across the planet. Males and females of this species spawn as pairs in flooded vegetation in turbid waters and appear to use pheromones to locate and identify each other. 

Can be defined as weight or mass increase with age in a multiplicative way (from Medewar, R, Size, shape and age, in Essays in Growth and Form Presented to D Arcy Wentworth Thompson, Clarendon Rress, Oxford, UK, 1945, p. 708, as cited by Smith, R.W. and Ottema, C., Growth, oxygen consumption and protein and RNA synthesis rates in the yolk sac larvae of the African catfish Clarias gariepinos). Comp. Biochem. Physiol. Part A 143, 315-325, 2006). 

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