The reports of lesions in kidney and intestine of apparently normal cultured silver carp (Hypophtalmictys molitrix)

Mahsa Jafarizadeh, Rahim Peyghan, Babak Mohammadian

Department of Fisheries, Islamic Azad University Ahvaz Branch, Ahvaz, Iran.
Veterinary Faculty, Shahid Chamran University, Ahvaz, Iran.

DOI: 10.4236/abb.2012.32017                

Abstract

Among fresh water fishes, silver carp because of fast growth rate and desired meat quality, is a dominant species in polyculture systems in Iran. This fish mainly feed on phytoplankton. In present survey kidney and intestine of 120 silver carp (Hypophtalmictys molitrix) from 4 regions in Khuzestan province-Iran have been studied. Tissue samples were provided from kidney and intestine and sectioned by routine method after paraffin embedding and finally stained with hematoxilin and eosin (H & E). The microscopic results were analyzed qualitatively and quantitatively. Microscopical analysis showed that kidney tissue had lesions including: edema, necrosis, uroliths, hemorrhage and degeneration. In different regions, fishes showed different prevalence of lesions. Edema and urolith were the most prevalent lesions (30 and 25 percent respectively). In histometric analysis the diameter of layers of intestine in some of the fish farms were significantly higher than the other regions. This increase was because of increase in muscular layer. The intensity of all lesions was estimated as light according to distribution of lesions. The probable cause of these lesions may be the high stocking density, intoxication, water quality problem such as excessive carbon dioxide. The only lesion in intestine was the excessive proliferation of mucus cells that this lesion may be created due to the improper plankton diet.

Keywords

Lesions; Kidney; Intestine; Silver Carp; Hypophtalmictys molitrix

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Sehgal, H.S. and Sehgal, G.K. (2002) Aquacultural and socio-economic aspects of processing carps into some value-added products. Bioresource Technology, 82, 291-293. doi:10.1016/S0960-8524(01)00182-1
[2]	Asgharzadeh, A., Shabanpour, B., Aubourg, S.P. and Hosseini, H. (2010) Chemical changes in silver carp (Hypophtalmichthys molitrix) minced muscle during frozen storage: Effect of washing process. Fisheries Department, Agriculture and Natural Resources University, Gorgan.
[3]	Iinuma, M., Sharma, K.R. and Leung, P.S. (1999) Technical efficiency of carp pond culture in peninsula Malaysia: An application of stochastic production frontier and technical inefficiency model. Aquaculture, 175, 199-213. doi:10.1016/S0044-8486(99)00033-2
[4]	Ahmed, M.S. (2009) Effect of different artificial diets on growth rate condition and histogical structure of Nile tilapia. Research Journal of Fisheries and Hydrobiology, 4, 29-34.
[5]	Cengiz, I. (2006) Gill and kidney histopathology in the freshwater fish Cyprinus carpio after acute exposure to deltamethrin. Environmental Toxicology and Pharmacology, 22, 200-204. doi:10.1016/j.etap.2006.03.006
[6]	Delashoub. M., Pousty, H. and Khojasteh Banam, S.M. (2010) Histology of bighead carp intestine. Global Veterianaria, 5, 302-306.
[7]	Kuperman, B.I. and Kuzmina, V.V. (1996) Structure and function of intestinal epithelium in fresh-water teleosts with different types of feeding. International Congress on the Biology of Fish, San Francisco.
[8]	Ke, Z.X., Ping, X. and Guo, L.G. (2008) Phenotypic plasticity gut length in the planktivorous filter-feeding silver carp (Hypophtalmichthys molitrix). The Scientific World Journal, 8, 169-175. doi:10.1100/tsw.2008.37
[9]	Woo, P.T.K. (1995) Fish diseases and disorders vol. 3: Viral, bacterial and fungal infections. CABI Publishing, Oxon.
[10]	Stoskopf, M.K. (1993) Fish medicine. W.B. Sannders, Philadelphia.
[11]	Silva, A.G. and Martinez, C.B.R. (2007) Morphological changes in the kidney of a fish living in an urban stream. Environmental Toxicology and Pharmacology, 23, 185-192. doi:10.1016/j.etap.2006.08.009
[12]	Mares, J., Palikova, M., Kopp, R., Navratil, S. and Pikula, J. (2009) Changes in the nutritional parameters of muscles of the common carp (Cyprinus carpio) and the silver carp (Hypophtalmichthysmolitrix) following environmental exposure to cyanobacterial water bloom. Aquaculture Research, 40, 148-156. doi:10.1111/j.1365-2109.2008.02074.x
[13]	Melaa, M., Randia, M.A.F., Venturab, D.F., Carvalhoc, C.E.V., Pelle-tierd, E. and Oliveira Ribeiroa, C.A. (2007) Effects of dietary methylmercury on liver and kidney histology in the neotropical fish Hoplias malabaricus. Ecotoxicology and Environmental Safety, 68, 426-435. doi:10.1016/j.ecoenv.2006.11.013
[14]	Xie, P., Chen, J., Zhang, D., Ke, Z. and Yang, H. (2006) In situ studies on the bioaccumulation of microcystins in the phytoplanktivorous silver carp (Hypophthalmichthys molitrix) stocked in Lake Taihu with dense toxic Microcystis blooms. Aquaculture, 261, 1026-1038.
[15]	Domaizon, I. and Dévaux, J. (1999) Impact of moderate silver carp biomass gradient on zooplankton communities in a eutrophic reservoir. Consequences for the use of silver carp in Biomanipulation. Life Sciences, 322, 621-628.
[16]	Couillard, C.M., Williams, P.J., Courtenay, S.C. and Rawn, G.P. (1999) Histopathological evaluation of Atlantic tomcod (Microgadus tomcod) collected at estuarine sites receiving pulp and paper mill effluent. Aquatic Toxicology, 44, 263-278. doi:10.1016/S0166-445X(98)00085-X
[17]	Benli, A., Koksal, G. and Ozkul, A. (2008) Sublethal ammonia exposure of Nile tilapia (Oreochromis niloticus): Effects on gill, liver and kidney histology. Chemosphere, 72, 1355-1358. doi:10.1016/j.chemosphere.2008.04.037