Labeo rohita (Hamilton, 1822)

Synonyms: Cyprinus rohita Hamilton, 1822, Fishes of the Ganges, p. 301; Rohita buchanani Valenciennes, 1842, Hist. Nat. Poiss. 16: 251; Labeo rohita; Day, 1878.

Labeo rohita (Hamilton, 1822)

Common names: Rohu

Local name: Rui, Rohit, Rou

 

Taxonomy position:

Phylum : Chordata

Class     : Oesteichthyes

Order    : Cypriniformes

Family  : Cyprinidae

Genus   : Labeo

Species : Labeo rohita (Hamilton, 1822)

 

Length : Total Length : 8.52 cm,  Standard Length: 6.77 cm (observed).Total length over 90 cm  (Rahman, 1889)

Fin formula

D. 15; P1. I/17; P2. I/8; A. 2/5 (Observed)

D. 15-16 (3/12-13);   P₁. 16-17;  P_2. 9; A. 7(2/5). (Rahman, 2005)

Morphology: Body moderately elongate, its dorsal profile more arched than the ventral profile, snout fairly depressed, nostrils two pairs and at anterior superior angle of orbits, gill-openings wide. Gills rakers feeble and arranged at short intervals, lateral line complete, scales moderate (Talwar and Jhingran 1991).

Habit and Habitat: Its food comprises crustaceans and insect larvae in early stages (Mookerjee et. al., 1946). The percentage composition of food of L. rohita may be algae 35%, higher plants 20%, protozoa 23%, crustaceans 15%, mud and sand 7%. L. rohita takes small percentages of mud which contains organic matter and various salts. This species is available throughout Bangladesh. Ponds, rivers, rivulets are its main habitats (Bhuiyan, 1964). The fecundity of this species varies from 2,26,000 to 2,79,4000 depending upon the length and weight (Talwar and Jhingran,1991).

Reference

Bhuiyan, A. L. 1964. Fishes of Dacca. Asiatic Society of Pakistan, Dacca. p 21.

Mookerjee, H. K., Sen Gupta, S. N. and Roy Choudhury, D. N. 1946. Food and its percentage composition of the common adult food fishes of Bengal. Sci. & Cult. Calcutta. 12 (7): 247.

Talwar, P. K. and Jhingran, A. G., 1991. Inland Fishes of India and Adjacent Countries. Volume 1. Oxford & IBH Publishing Co. Pvt. Ltd. New Delhi, Calcutta. p 219.

Rahman, A.K.A. 1989. Freshwater Fishes of Bangladesh. The Zoological Society of Bangladesh, Department of Zoology, University of Dhaka, Dhaka-1000. p 116.

Citation : Hossain, M.M. 2020. Labeo rohita, Freshwater Fish of Bangladesh. Biodiversity Conservation Fisheries Research Center, Dhaka, Nature World.