Volume 3, Issue 1, February 2014, Page: 17-23
Food and Feeding Habits of the Red-Belly Tilapia (Tilapia zillii Gervais, 1848) (Pisces: Cichlidae) in Lake Ziway, Ethiopia
Elias Dadebo, Department of Biology, Hawassa University, P. O. Box 5, Hawassa, Ethiopia
Negesse Kebtineh, Department of Wild Life, Wetland and Fishery Management, Wondo Genet College of Forestry and Natural Resources, Hawassa University, Shashemene, Ethiopia
Solomon Sorsa, Department of Biology, Hawassa University, P. O. Box 5, Hawassa, Ethiopia
Kassaye Balkew, Department of Biology, Hawassa University, P. O. Box 5, Hawassa, Ethiopia
Received: Dec. 24, 2013;       Published: Jan. 30, 2014
DOI: 10.11648/j.aff.20140301.14      View  4285      Downloads  378
Abstract
Food and feeding habits of T. zillii were studied from 572 fish samples collected from April to May 2011 (dry season) and July to August 2011 (wet season) from Lake Ziway. Stomach content analysis was conducted using frequency of occurrence and volumetric methods of analyses. Macrophytes, detritus and phytoplankton were the dominant food categories occurring in 94.9%, 94.2% and 82.5% of the total stomachs examined and constituting 45.2%, 29.4% and 16.8% of the total volume, respectively. The contributions of insets, nematodes, zooplankton and ostracods were relatively low. Macrophytes (50.4%), phytoplankton (21.8%) and detritus (18.5%) constituted the bulk of the food volume during the dry season. In the wet season detritus (40.8%), macrophytes (37.8%), phytoplankton (12.5%) and insects (6.5%) contributed the bulk of the food categories consumed. Phytoplankton, detritus and insects were important food categories of juveniles (5.0-9.9 cm TL) whereas macrophytes, detritus and phytoplankton were important food categories of adults. The importance of phytoplankton, detritus and insects declined with size of fish whereas the importance of macrophytes and nematodes increased with fish size. Based on the results of the stomach contents it was concluded that the species is an herbivorous feeding mainly on macrophytes, detritus and phytoplankton. The contribution of animal origin food was low.
Keywords
Diet composition, feeding, Lake Ziway, T. zillii
To cite this article
Elias Dadebo, Negesse Kebtineh, Solomon Sorsa, Kassaye Balkew, Food and Feeding Habits of the Red-Belly Tilapia (Tilapia zillii Gervais, 1848) (Pisces: Cichlidae) in Lake Ziway, Ethiopia, Agriculture, Forestry and Fisheries. Vol. 3, No. 1, 2014, pp. 17-23. doi: 10.11648/j.aff.20140301.14
Reference
[1]
El- Shazly A. 1993. Biological studies on four cichlid fishes (Tilapia nilotica, Tilapia galilae, Tilapia zillii, Tilapia aurea). MSc Thesis, Zagazig University, Egypt.
[2]
Negassa A. and Getahun A. 2004. Breeding season, length-weight relationship and condition factor of introduced fish, Tilapia zillii (Gervais, 1848) (Pisces: Cichlidae) in Lake Ziway, Ethiopia. SINET: Ethiop. J. Sci. 26(2): 115-122.
[3]
Kariman A.S.H. and Nadhan G. 2009. Some observations on fisheries biology of Tilapia zillii (Gervais, 1848) and Solea vulgaris (Quensel, 1806) in Lake Qarun, Egypt. World Fish Mari. Sci. 1(1): 20-28.
[4]
Mehanna S.F. 2004. Population dynamics of two cichlids, Oreochromis aureus and Tilapia zillii, from Wadi El-Raiyan Lakes. Egypt. Agri. Marine Sci. 9(1):9-16.
[5]
Spataru P. 1978. Food and feeding habits of Tilapia zillii (Gervais, 1848) (Cichlidae) in Lake Kinneret (Israel). Aquaculture 14(4): 327-338.
[6]
Akinuwmi F.O. 2003. Food and feeding habits of Tilapia zillii (Pisces: Chichlidae) in Ondo State University Fish Farm. Proceeding of the 16th Annual Conference of the Fisheries Society of Nigeria (FISON), Department of Environmental Biology and Fisheries (Nigeria).
[7]
Negassa A. and Padanillay C. 2008. Abundance, food habits, and breeding season of exotic Tilapia zillii and native Oreochromis niloticus fish species in Lake Ziway, Ethiopia, Mj. Int. J. Sci. Tech. 2: 345-359.
[8]
Adeyemi S.O., Bankole N.O., Adikwu I.A. and Akombu P.M. 2009. Food and feeding habits of some commercially important fish species in Gbedikere Lake, Bossa, Kogi State, Nigeria. Int. J. Lakes and Rivers 2(1): 31-36.
[9]
Mohamoud F.W., Amin M.A., Elboray F.K., Ramadan M.A. and Halfawy O.K. 2011. Reproductive biology and some observation on the age, growth, and management of Tilapia zillii (Gervais: 1848) from Lake Timsah, Egypt. Int. J. Fish. Aquac. 3(2): 16-26.
[10]
Markos T., Reidar B. and Bjørn O.R. 2011. Mercury concentrations are low in commercial fish species of Lake Ziway, Ethiopia, but stable isotope data indicated biomagnifications. Ecotox. Environ. Safety 74: 953-959.
[11]
Makin M.J., Kingham T.J., Waddans A.E., Birchall C.H. and Tamene T. 1975. Development prospects in the southern rift valley, Ethiopia. Land Resources Division, Ministry of Overseas Development 142: 324-567.
[12]
Ayenew T. 1998. The hydro biological system of the Lake District basin, central main Ethiopian rift valley, International Institute of Aerospace Survey and Earth Sciences. PhD Thesis, Earth Sciences, the Netherlands.
[13]
Lemma A. 2005. Site action plan for conservation and sustainable use of the Lake Ziway biodiversity, Rift Valley Lakes Project, Institute of Biodiversity, Addis Ababa.
[14]
Admassu D. and Ahlgren I. 2000. Growth of juvenile tilapia, Oreochromis niloticus L. from Lakes Ziway, Langeno and Chamo (Ethiopian rift valley) based on otolith micro-increment analysis. Ecol. Freshwat. Fish 9(3): 127-137.
[15]
Lake Fisheries Development Project (LFDP) (1998) Fisheries development in Ethiopia: which way now? Project. News. Bulletin.11 no. 1. Lake Fisheries Development Project, Addis Ababa, Ethiopia.
[16]
Hyslop E.J. 1980. Stomach contents analysis-a review of methods and their application. J. Fish Biol. 17: 411-429.
[17]
Wallace R.K. 1981. An assessment of Diet-Overlap Indexes. Trans. Am. Fish. Soc. 110: 72-76.
[18]
Sokal R.R. and Rohlf F.J. 1995. Biometry: The principles and practices of statistics in biological research 3rd ed. New York, Freeman and Company, pp. 859.
[19]
Schoener T.W. 1970. Non-synchronous spatial overlap of lizards in patchy habitats. Ecology 51: 408-418.
[20]
Mathur D. 1977. Food habits and competitive relationships of Bandfin shiner in Halawakee Creek, Alabama. Am. Midland Natura. 97: 89-100.
[21]
Siddiqui A.Q. 1977. Reproductive biology, length-weight and relative condition of Tilapia leucostica (Trewaeva) in Lake Naivasha, Kenya. J. Fish Biol. 10: 351-260.
[22]
Adama O., Wendengouing G., Allassane O., Germain G. and Brnerd H. 2008. Seasonal diet shift of the most important fish species in a Sahelo-Sudanian Reservoirs (Burkina Faso). J. Fish. Aquat. Sci. 3(4): 240-251.
[23]
Brown J. A. 1986. The development of feeding behavior in the Cichlidae. J. Fish Biol. 29: 17-178.
[24]
Layman C.A. and Silliman B.R. 2002. Preliminary survey and diet analysis of juvenile fishes of an estuarine creek on Andros Island, Bahamas. Bull Mar. Sci. 70(1): 199-210.
[25]
Layman C.A., Quattrochi J.P., Peyer C.M. and Allgeier J.E. 2007. Niche width collapse in a resilient top predator following ecosystem fragmentation. Ecol. Lett. 10(10): 937-944.
[26]
Njiru M., Okeyo-Owuor J.B., Muchiri M. and Cowx I.G. 2004. Shifts in the food of Nile tilapia, Oreochromis niloticus (L.) in Lake Victoria, Kenya. Afr. J. Ecol. 42: 163-170.
[27]
Legner E.F. 1978. Mass culture of Tilapia zillii (Cichlidae) in pond ecosystems. Entomopora 23: 51-55.
[28]
Perga M.E., Arfi R. and Gerdeaux F. 2005. Seasonal variations in fish d13C and d15N in two West African reservoirs, Selingue and Manantali (Mali): modification of trophic links in relation to water levels. Isotoes. Environ. Health Stud. 41(2): 1-15.
[29]
Tadesse Z. 1988. Studies on some aspects of the biology of Oreochromis niloticus L. (Pisces: Cichlidae) in Lake Ziway, Ethiopia. MSc Thesis, Addis Ababa University, Addis Ababa.
[30]
Wanink H. and Joordens C.A. 2003. Dietary shifts in Brycinus sadleri (Pisces: Characidae) from Southern Lake Victoria. Inst. Evolut. Ecol. Sci. 12: 230-350.
[31]
Mosaad M.N.M. 1990. Biological studies on five fish species from Lake Qarun, Egypt: length-weight relationship and condition factor. Proc. Zool. Soc. Egypt 21: 331-344.
[32]
Meyer D.E. 2002. Technology for successful small-scale tilapia culture (CRSP Research Report 02- 179). CRSP (Aquaculture Collaborative Research Support Program). Tilapia Sessions 2: 97-106.
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