An attempt was made under laboratory condition to estimate the functional response of fourth instar of R. fuscipes to different prey densities (1, 2, 4, 8 and 16) of D. koenigii. Fourth instar of this predator showed a curve linear functional response against first nymph of D. koenigii. The prey consumed ratio (y) of R. fuscipes was increased as the D. koenigii densities(x) increased from one D. koenigii/ R. fuscipes to 16 D. koenigii / R. fuscipes. The maximum predation rate was restricted to the maximum D. koenigii number (3.9). The predation attack ratio (y/x) at less prey density categories was highest. Searching time (Ts) and attack ratio (y/x) was decreased with the increasing prey density. The third instar of R. fuscipes showed curve linear functional response curve when offered with different prey densities. The killing efficiency was higher at nymphal stage.
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Claver et al. (2024) studied this question.
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