Skip to main content
. 2023 Nov 27;11:e16461. doi: 10.7717/peerj.16461

Table 1. Functional response of N. californicus adult females to the different life stages of T. urticae at different temperatures.

Temperature Stage a (Attack rate) Th (Handling time) a/Th T/Th ( K) Na (Functional response equation) R2 (Correlation coefficient)
24 °C Adult 0.357 0.037 9.581 26.81 0.357N/(1 + 0.013N) 0.861
Nymph 0.609 0.013 46.82 76.92 0.609N/(1 + 0.008N) 0.936
Larvae 0.537 0.021 25.09 46.02 0.537N/(1 + 0.011N) 0.946
Egg 0.626 0.005 127.7 204.1 0.626N/(1 + 0.003N) 0.934
27 °C Adult 0.412 0.020 20.59 50.00 0.412N/(1 + 0.008N) 0.928
Nymph 0.749 0.014 52.06 69.44 0.749N/(1 + 0.011N) 0.953
Larvae 0.772 0.012 66.00 85.47 0.772N/(1 + 0.009N) 0.974
Egg 0.606 0.003 195.6 322.6 0.606N/(1 + 0.002N) 0.959
30 °C Adult 0.539 0.016 34.09 63.29 0.539N/(1 + 0.009N) 0.971
Nymph 0.653 0.009 72.59 111.1 0.653N/(1 + 0.005N) 0.985
Larvae 0.614 0.011 55.32 90.09 0.614N/(1 + 0.007N) 0.988
Egg 0.673 0.002 320.7 476.2 0.673N/(1 + 0.001N) 0.968
33 °C Adult 0.541 0.005 112.9 208.3 0.541N/(1 + 0.003N) 0.989
Nymph 0.666 0.004 185.0 277.7 0.666N/(1 + 0.002N) 0.992
Larvae 0.734 0.004 183.5 257.0 0.734N/(1 + 0.003N) 0.996
Egg 0.624 0.012 46.96 80.00 0.624N/(1 + 0.008N) 0.994
36 °C Adult 0.560 0.003 186.7 333.3 0.560N/(1 + 0.002N) 0.955
Nymph 0.614 0.012 50.78 82.64 0.614N/(1 + 0.007N) 0.986
Larvae 0.705 0.001 587.7 833.3 0.705N/(1 + 0.001N) 0.954
Egg 0.588 0.012 47.01 80.00 0.588N/(1 + 0.007N) 0.985

Note:

Na, number of prey consumed; N, initial prey density; Th, handling time (day); a, attack rate; K, maximum predation rate; R2, coefficient of determination.