Int. J. Biosci.11(4), 335-342, October 2017
Oreochromis mossambicus (Peters, 1852) is herbivorous exotic fish, mostly distributed worldwide and served as prominent food item. Our research is based on finding of length-weight relationships and stomach content analysis of Oreochromis mossambicus collected from fish market of Quetta city. A total of 250 fish samples including 138 male and 112 female were collected during the months of April 2016 to March 2017. The calculated length ranged from 9cm to 24.6cm (combined) and the weight ranged from 17.3g to 280g. The length weight relationship was calculated and represented as logarithmic form as Log W = -1.751+3.0071 × Log L , Log W= -1.7719+3.0212×Log L and Log W= -1.7272+2.9913×Log L were separately calculated for combined, male and female population respectively. The values of b for combined, male and female were 3.01, 3.02 and 2.99 respectively, which show isometric growth in Oreochromis mossambicus. Dissection of fish samples were made for food and feeding habits determination. Basic food of this fish mainly comprised of cynophyta (41.30%) and bacillariophyta (20.11%) followed by euglenophycea (16.11%), Chlorophyta (10.47%), Miscellaneous (10.74%), Copepod (0.72%), Plant matter (0.36%), rotifers (0.19%), algae (0.01%). In conclusion, the fish was found positive allometric in growth and omnivorous in nature.
Achakzai WM, Saddozai S, Baloch WA, Memon N. 2013. Length-Weight Relationships and Condition Factor of Oreochromis mossambicus (Peters, 1852) from Manchar Lake Distt. Jamshoro, Sindh, Pakistan. Sindh University Research Journal-SURJ (Science Series) 45(2).
Arslan M, Yildirim A, Bektas S. 2004. Length-weight relationship of brown trout, Salmo trutta L., inhabiting Kan stream, Coruh Basin, north-eastern Turkey. Turkish Journal of Fisheries and Aquatic Sciences 4, pp.45-48.
Bagenal TB, Tesch, FW. 1978: Age and growth. In: Methods for assessment of fish production in freshwater, 3rd Edn, T. Bagenal. (Ed), IBP Handbook No, 3. Blackwell Scientific Publication, Oxford, UK pp. 101-136.
Balarin AE. 1979. Distribution patterns of cichlids in the tropical waters. Oliver, Edinburgh 42, 35-38.
Bard J, De Kimpe PJ, Lazard J, Lemasson J, Lessent P. 1976. Hand Book of Tropical Fish Culture. Centre Technique Forestier Tropical, France 128.
Beyer JE. 1987. On length- weight relationships. Part 1: Computing the mean weight of the fish of a given length class. Fishbyte 5, 11-13.
Biswas SP. 1993. Manual of Methods in Fish Biology. South Asian Publishers Pvt. Ltd. ., New. Delhi International Book Co 157 p.
Dan-Kishiya AS. 2013. Length-weight relationship and condition factor of five fish species from a tropical water supply reservoir in Abuja, Nigeria. American Journal of Research Communication 1, pp.175-187.
Frose RP. 2011. Fish Base. World wide web electronic publication. www.fishbase.org 06: 2011.
Herath HMTNB, Radampola K, Herath SS. 2014. morphological variation and length weight relationship of Oreochromis mossambicus in three brackish water systems of southern Sri Lanka. International Journal 2, pp. 2311-2476.
Hynes HBN. 1950. The Food of Fresh-Water Sticklebacks (Gasterosteus aculeatus and Pygosteus pungitius), with a Review of Methods Used in Studies of the Food of FishesJournal of Animal Ecology 19, 36.
Hyslop EJ. 1980. Stomach contents analysis a review of methods and their application. Journal of fish biology 17, 411-429.
King RP. 1996. Length-weight relationship of Nigeria freshwater fishes. Naga ICLARM Quaterly 19, 49-52.
Mirza MR. 1990. Freshwater fishes of Pakistan (Urdu Eds.), Urdu Science Board, 299 Upper Mall, Lahore pp. 6-130.
Naeem M, Salam A, Ashraf M, Baby R, Ali M, Ishtiaq A. 2011a: length–weight relationship of female population of farmed Oreochromis mossambicus in relation to body size and condition factor from Pakistan, international conference on Bioinformatics and Biomedical Engineering, Amsterdam, The Netherlands, July 13-15,World Acad. Sci. Eng. Technol 78, 1149-1153.
Naeem M, Salam A, Gillani Q, Ishtiaq A. 2010. Length-weight relationships of Notopterus notopterus and introduced Oreochromis niloticus from the Indus River, southern Punjab, Pakistan. J. Appl. Ichthyo 26, p. 620.
Naeem M, Zuberi A, Salam A, Ali M, Riaz-ul-Haq M, Khalid M, Mehreen M, Nasir MF, Rasool SA, Ishtiaq A. 2011b. Some morphometric relationships of hatchery reared male population of Oreochromis mossambicus from Pakistan. African Journal of Biotechnology 10, 17362-17366.
Natarajan AV, Jhingran AG. 1961. Index of preponderance – a method of grading the food elements in the stomach analysis of fishes. Indian J. Fish 8, 54-59.
Pauly D. 1983. Some simple methods for the assessment of tropical fish stocks. FAO Fisheries Technical paper, (234), FAO, Rome, Italy 52 pp.
Pauly D. 1993. Linear regressions in fisheries research. Journal of the Fisheries Research Board of Canada 30, 409-434.
Pennak RM.1989. Fresh-water invertebrates of the United State. 3rd ed, Jonson Willey and Sons, Inc New York, pp. 254-264.
Pervin MR, Mortuza MG. 2008. Notes on lenght weight relationship and condition factor of fresh water fish Labeo boga (Hamilton). University Journal Rajshahi University 27, pp. 97-98.
Sangpradub N, Boonsoong B. 2006. Identification of Freshwater Invertebrates of the Mekong River and its tributaries. Mekong River Commission, Vientiane 274 pp.
Ward HG, Whiple GC. 1959. Freshwater Biology. John Wiley and Sons, Inc., Newyork 124 pp.