International Journal of
Fisheries and Aquaculture

  • Abbreviation: Int. J. Fish. Aquac.
  • Language: English
  • ISSN: 2006-9839
  • DOI: 10.5897/IJFA
  • Start Year: 2010
  • Published Articles: 216

Full Length Research Paper

Food and fish feeding habits in Anwai stream ichthyofauna, Niger-Delta

Onyeche V. E. O.
  • Onyeche V. E. O.
  • Institute for Freshwater Fisheries Research, P. M. B 6006 New Bussa, Niger State, Nigeria.
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Onyeche L. E.
  • Onyeche L. E.
  • Fisheries Department, Ministry of Agriculture and Natural Resources, Asaba, Delta – State, Nigeria.
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Akankali J. A.
  • Akankali J. A.
  • Department of Animal Science and Fisheries, University of Port Harcourt, P. M. B. 5323, Port Harcourt, Nigeria.
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Enodiana I. O.
  • Enodiana I. O.
  • Institute for Freshwater Fisheries Research, P. M. B 6006 New Bussa, Niger State, Nigeria.
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Ebenuwa P.
  • Ebenuwa P.
  • Institute for Freshwater Fisheries Research, P. M. B 6006 New Bussa, Niger State, Nigeria.
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  •  Accepted: 11 November 2013
  •  Published: 30 November 2013

Abstract

The food and feeding habits of some fish fauna in Anwai stream were investigated. Fish samples (160 individual fish in 19 species) were collected using combination of traps, gill nets of various mesh sizes and baited hooks and lines in the three zones (upper, middle and lower reaches) of the stream. Stomach content analysis was carried out using frequency of occurrence, numerical analysis and volumetric analysis. It was observed that Hemichromis Fasciatus competed with fish species of commercial importance viz Tilapia zilli, Christinus guentheri and Oreochromis niloticus for major food items (100 F% of blue green algae, green algae and diatom). Feeding intensity (absolute importance index) of Hemichromini bimasculatus (700) and O. niloticus (801) remain relatively higher than that of the other fish species during the study.

Key words: Stomach content analysis, frequency of occurrence, absolute importance index, Anwai stream.