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- Publisher
- Taylor & Francis
- Copyright
- Copyright © NISC (Pty) Ltd
- ISSN
- 1727-9364
- eISSN
- 1608-5914
- DOI
- 10.2989/16085914.2014.980774
- Publisher site
- See Article on Publisher Site
Abstract
The stomach contents of eight species of predatory or omnivorous fish caught in gillnets in the Kafue River in May and June 2010 were examined to determine the relative importance, expressed as ‘prominence value’ (PV), of crayfish Cherax quadricarinatus in their diet. Four species, Clarias gariepinus, Schilbe intermedius, Serranochromis robustus and Serranochromis angusticeps, had fed on C. quadricarinatus. The PV of C. quadricarinatus was highest in C. gariepinus, in which the quantity and size of crayfish eaten was significantly correlated with standard length (SL) of fish >200 mm SL. Predated C. quadricarinatus were significantly smaller (mean carapace length [CL] 30 mm; SE 1.2) than those caught in gillnets (mean CL 76 mm; SE 0.9). No C. quadricarinatus remains were found in the stomachs of Oreochromis andersonii, Synodontis macrostigma, Serranochromis macrocephalus or Mormyrus lacerda.
Journal
African Journal of Aquatic Science – Taylor & Francis
Published: Oct 2, 2014
Keywords: Clarias gariepinus; Kafue floodplain; Namwala; Schilbe intermedius; Serranochromis angusticeps; Serranochromis robustus