Fish diversity and distribution in two protected rivers, Sardabrud and Chalus, southern Caspian Sea basin, Iran



Fish species diversity, distribution and abundance were studied in the Sardabrud and Chalus rivers, in the Southern Caspian Sea Basin, during 1992 and 1993 in five and four stations respectively, by monthly collections using electrofishing device. In total, 3200 fish specimens, including 15 species in Sardabrud River and 12 species in Chalus River, were investigated. The fish comprised of 13 genera and 5 families: Petromyzontidae, Cyprinidae, Cobitidae, Salmonidae and Gobiidae; the majority being Cyprinidae. This is the first report of Pseudorasbora parva in Sardabrud River. The Shanon’s index for Sardabrud River ranged from 0 to 1.77 and for Chalus River from 0 to 1.91. Fish species diversity was significantly correlated with altitude (r2= 0.96 and P< 0.01). The species diversity increases as one moves from the headstream towards the estuaries of the two studied rivers. Species diversity was independent of position but dependent on depth alone.


Chalus River, Fish Distribution, Sardabrud River, Species Diversity.

Full Text:



Cashner, R.C. & Brown, J.D. 1977. Longitudinal distribution of fishes of the Buffalo River in northwestern Arkansas. Tulane Studies in Zoology & Botany 19: 37-46.

Foltz, J.W. 1982. Fish species diversity and abundance in relation to stream habitat characteristics. Proceedings of the Annual Conference of the Southeast Association of fish and wildlife Agencies 36: 305-311.

Gorman, O.T. & Karr, J.R. 1978. Habitat structure and stream fish communities. Ecology 59: 507-515.

Harrel, R.C. & Dorris, T.C. 1968. Steram order, morphology, physic-chemical conditions and community structure of benthis macro-invertebrates in an intermittent stream system. American Midland Naturalist 80: 220-251.

Harrel, R.C.; Davis, B.J. & Dorris, T.C. 1967. Stream order and species diversity of fishes in an intermittent Oklahoma stream. American Midland Naturalist 78:428-436.

Humpl, M. & Pivnička, K. 2006. Fish assemblages as influenced by environmental factors in streams in protected areas of the Czech Republic. Ecology of Freshwater Fish 15: 96–103.

Hynes, H.B.N. 1970. The Ecology of Running Waters. University of Toronto Press, Toronto, Canada. 555p.

Jenkins, R.E. & Freeman, C.A. 1972. Longitudinal distribution and habitat of the fishes of Mason Creek, an Upper Roanoke River drainage tributary, Virginia. Virginia Journal of Science 23: 194-202.

Kuehne, R.A. 1962. A classification of stream, illustrated by fish distribution in an eastern Kenthuky creek. Ecology 43:608-614.

Lotrich, V.A. 1973. Growth, production, and community composition of fishes inhabiting a first, second, and third-order stream of eastern Kenthuky. Ecological Monographs 43: 377-397.

Mares, M.A. 1986. Conservation in South America: problems, consequences, and solutions. Science 233: 734-739.

Matthews, W.J. 1985. Distribution of Midwestern fishes on multivariate environmental gradients, with emphasis on Notropis lutrensis. American Midland Naturalist 113: 225-237.

Minshall, G.W. 1988. Stream ecosystem theory: a global perspective. Journal of the North American Benthological Society 7: 263-288.

Oberdorff, T., Guégan, J. F. and Hugueny, B. 1995. Global scale patterns of fish species richness in rivers. Ecography 18: 345-352

Pyron, M & Lauer, T.E. 2004. Hydrological variation and fish assemblage structure in the middle Wabash River. Hydrobiologia 525: 203-213.

Power, M.E.; Stout, R.J.; Cushing, C.E.; Harper, P.P.; Hauer, F.R.; Matthews, W.J.; Moyle, P.B.; Statzner, B. & Wais de Badgen, I.R. 1988. Biotic and abiotic controls in river and stream communities. Journal of the North American Benthological Society 7: 456-479.

Rahel, F.J. & Hubert, W.A. 1991. Fish assemblages and habitat gradients in a rocky mountain-great stream: biotic zonation and additive patterns of community change. Transaction of the American Fisheries Society 120: 319-332.

Reid, G.K. 1961. The ecology of inland waters and estuaries. Reinhold, New York, USA.

Reyjool, Y.; Compin, A.; Ibarra, A. & Lim, P. 2003. Longitudinal Diversity Patterns in streams: comparing invertebrates and fish communities. Archives of Hydrobiology 157(4): 525-533.

Shannon, C.E. & Weaver, W. 1949. The Mathematical Theory of Communications. University of Illinois Press, Urbana, USA. 117p.

Sheldon, L.A. 1968. Species diversity and longitudinal succession in stream fishes. Ecology 49: 193-198.

Shelford, V.E. 1911. Ecological succession. I. Stream fishes and the method of physiographic analysis. Biological Bulletin 21: 9-35.

Thompson, D.H. & Hunt, F.D. 1930. The fishes of Champaign Country. Ill. Natural History Survey Bulletin 19: 5-101.

Whiteside, G.B. & McNath, R.M. 1972. Fish species diversity in relation to steam order and physicochemical conditions in the Plum Creek drainage basin. American Midland Naturalist 88: 90-101.


  • There are currently no refbacks.