BIOLOGY OF BRACHYDANIO RERIO (HAMILTON, 1822) FROM NORTH EASTERN HILL REGION, INDIA
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Authors
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B K MAHAPATRA
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W S LAKRA
Abstract
The Zebra danio, Brachydanio rerio (Hamilton) is one of the most popular Indian ornamental fish both locally and globally. Length-weight relationship of B. rerio indicating negative allometric growth in male, positive allometric
growth in female, isometric growth in combined sex and found to be significantly different at 1% level. The fish does not follow the cube law strictly. Maximum number of fishes were found distributed in 26 to 30 mm size group (33.52%) followed by 21 to 25 mm size group (23.98%). In natural condition the fish feed predominantly on phytoplankton (98 %) the rest was zooplankton (2%). Bacillariophyceae was the most abundant group with an average of 50%. Minimum number of ova produced was 215 (29 mm; 0.20 g) and maximum ova was 2836 (49 mm; 1.81 g). Sex ratio in nature was
1female:1.77male. 5+ months old of males and 6+ months old of females were attained the first maturity. Successfulnspawning was recorded in captive condition. 288-300eggs are found per spawning per female. The Gonado-Somatic Index for the gravid females during breeding period ranged 8.06 - 28.95 with an average 16.14. The fertilized eggs measuring 0.8-1.3 mm in diameter were demersal, non adhesive, almost spherical in shape, optically transparent and unpigmented. The embryos hatched within 40-42 hrs and measured 2.8±0.1 mm in total length.
Key words: NEH region, Brachydanio rerio, biological characters, breeding, development biology
References
Bhattacharya, P. and Banik, S. 2012. Length weight
relationship and condition factor of the pabo fish Ompok
pabo (Hamilton, 1822) from Tripura, India. Ind J Fish.,
: 141-146.
Dey, S., Ramanujam, S. N. and Mahapatra, B. K. 2014.
Breeding and development of ornamental hill stream fish
Devario aequipinnatus (McCelland) in captivity. Indian
Journal of Fisheries and Aquatic Studies, 1: 01-07.
Fisher, R. A. 1970. Statistical Methods for Research
Workers, 362pp, 14th edition.Oliver and Boyd, Edinburg.
Grimes, B and Huntsman 1980. Reproductive
biology of the Vermilion Snapper, Rhomboplites
aurorubens from North Carolina and South
Carolina. Fish. Bull.,78: 137-146.
Hynes, H.B.N. 1950. On the food of the freshwater
Sticklebacks (Gastrosteus aculeatus and Pygosteus
pungitius) with a review of the methods used in the
study of food fishes. Journal of Animal Ecology,
: 36-58.
Le Cren, E.D. 1951. The length-weight relationship and
seasonal cycle in gonad weight and condition in the
perch (Perca fluviatilis). J Anim Ecol., 20 : 201-219.
Mahapatra, B. K., Vinod, K. and Mandal, B. K. 2004.
Ornamental fish of North Eastern India-its distribution
and conservation status. Environ .Ecol., 22(3):674-683.
Mahapatra, B.K., Vinod, K. and Mandal, B.K. 2001.
Ornamental Fishery - A New Horizon for R & D in
Meghalaya.National Seminar on “Approaches for
Increasing AgriculturalProductivity in Hill and
Mountain Ecosystemâ€, Oct 18-20, 2001, ICAR Research
Complex for NEH Region, Umiam.
Mahapatra, B. K., Vinod. K., Mandal, B.K. and
Bujarbaruah, K.M. 2006. Ornamental Fisheries in North
Eastern India. Indian Council of Agricultural Research.,
Bulletin No. 49.
Mandal, S., Mahapatra, B. K., Tripathi, A. K., Verma, M.
R., Datta, K. K. and Ngachan, S. V. 2007. Agricultural
Economics Research Review, 20 (Conference Issue):
-488.
Sen, N. 2000. Occurrence, distribution and status of
diversified fish fauna of North East India. Occasional
paper. Zoological survey of India.
Talwar, P. K. 1962. A contribution to the biology of the
halfbeak, Hyporhamphus georgii (Cuv. and Val.)
(Hemirhamphidae). Indian. J. Fish., 9(1): 168-196.
Varghese, T. J. 1961. Observations on the biology of
Raconda russelliana (Gray). Indian J. Fish., 8(1): 96-
Vinod, K., Mahapatra, B.K. and Mandal, B.K. 2001.
Brachydanio rerio (Hamilton) and Danio dangila
(Hamilton) - Promising Species for Ornamental
Fisheries in Meghalaya and Strategies for Judicious
Exploitation. Workshop on “Integration of Fish
Biodiversity Conservation and Development of
Fisheries in North Eastern Region Through Community
Participationâ€; Dec 12-13, 2001, organized jointly by the
NBFGR, Lucknow and the North Eastern Council (NEC),
Shillong.
Vishwanath, W. 2010. Danio rerio. The IUCN
Red List of Threatened Species.Version
2.. Downloaded on 18 May
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