Sulem, S.Y. and Brummett, R.E. (2006) Relative importance of various predators in Clarias gariepinus fry mortality in Cameroon. Naga, Worldfish Center Quarterly, 29(3-4), pp. 74-77.
To estimate the relative importance of the most common predators of Clarias gariepinus fry, increasing levels of protection were afforded to exclude amphibians, aquatic arthropods and birds. At a stocking density of 10 larvae/sq.m. in nursing ponds, fencing off amphibians resulted in a 28 per cent decrease in mortality. Holding fry in hapas to protect them from both amphibians and aquatic arthropods decreased mortality by an insignificant 5.7 per cent. Installation of bird-netting over the hapas reduced mortality by 21.7 per cent. The remaining 4.9 per cent of total mortality, which could not be explained, was attributed to opportunistic cannibalism, disease and/or handling stress. Increasing stocking density to 40/sq. m. and, thus, reducing the food available per fry increased mortality by 28.3 per cent.
|Item Type: ||Article|
|Title: ||Relative importance of various predators in Clarias gariepinus fry mortality in Cameroon|
|Personal Creator/Author: |
|Journal or Publication Title: ||Naga, Worldfish Center Quarterly|
|Page Range: ||pp. 74-77|
|Issuing Agency: ||WorldFish Center|
|Uncontrolled Keywords: ||Fry; Mortality; Predators|
|Item ID: ||9522|
|Depositing User: ||Mr William Ko|
|Date Deposited: ||07 Oct 2012 16:57|
|Last Modified: ||07 Oct 2012 16:57|
Actions (login required)