Abstract
Functional response describes the rate at which a predator consumes prey. Handling time, duration that a predator spends on a captured prey for the consumption, is one of the parameters of many functional response models. Although models typically assume that handling time is static, most empirical studies that directly quantified the relationship between handling time and prey density show that handling time decreases with prey density. In this study, I compare a community model that employs density-dependent handling time and a model with static handling time for their responses to enrichment. The density-dependent handling time is derived by assuming that predators adjust handling time to maximize their fitness. I show that the model with adaptive handling time is more robust to enrichment than the model with static handling time at realistic parameter values. Although community response to enrichment is used as an illustrative example, density-dependent handling time is a common empirical observation and would have general implications to ecological dynamics.
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References
Abrams, P. A. 1982. Functional responses of optimal foragers. Am. Nat. 120: 382–390.
Abrams, P. A. 1990. The evolution of anti-predator traits in prey in response to evolutionary change in predators. Oikos 59: 147–156.
Abrams, P. A. 1992. Predators that benefit prey and prey that harm predators: unusual effects of interacting foraging adaptations. Am. Nat. 140: 573–600.
Abrams, P. A. and L. R. Ginzburg. 2000. The nature of predation: prey dependent, or ratio dependent or neither? Trends Ecol. Evol. 15: 337–341.
Bolker, B., M. Holyoak, V. Křivan, L. Rowe, and O. Schmitz. 2003. Connecting theoretical and empirical studies of trait-mediated interactions. Ecology 84: 1101–1114.
Case, T. J. 1983. Niche overlap and assembly of island lizard communities. Oikos 41: 427–433.
Case, T. J. 2000. An Illustrated Guide to Theoretical Ecology. Oxford Univ. Press, Oxford.
Chesson, J. 1989. The effect of alternative prey on the functional response of Notonecta hoffmani. Ecology 70: 1227–1235.
Collins, M. D., S. A. Ward, and A. F. G. Dixon. 1981. Handling time and the functional response of Aphelinus thomsoni, a predator and parasite of the aphid Drepanosiphum platanoidis. J. Anim. Ecol. 50: 479–487.
Cook, R. M. and B. J. Cockrell. 1978. Predator ingestion rate and its bearing on feeding time and the theory of optimal diets. J. Anim. Ecol. 47: 529–547.
Cooper, W. E. and R. Anderson. 2006. Adjusting prey handling times and methods affects profitability in the broad-headed skink (Eumeces laticeps). Herpetologica 62: 356–365.
Delm, M. M. 1990. Vigilance for predators: detection and dilution effects. Behav. Ecol. Sociobiol. 26: 1432–0762.
Elliott, J. M. 2003. A comparative study of the functional response of four species of carnivorous stoneflies. Freshwater Biol. 48: 191–202.
Fussmann, G. F. and B. Blasius. 2005. Community response to enrichment is highly sensitive to model structure. Biology Lett. 1: 9–12.
Fussmann, G.F.,G. Weithoff, and T. Yoshida. 2005. A direct experimental test of resource vs. consumer dependence. Ecology 86: 2924–2930.
Fussmann, G.F.,G. Weithoff, and T. Yoshida. 2007. A direct experimental test of resource vs. consumer dependence: reply. Ecology 88:1603–1604.
Giller, P. S. 1980. The control of handling time and its effects on the foraging strategy of a heteropteran predator, Notonecta. J. Anim. Ecol. 49: 699–712.
Haynes, D. L. and P. Sisojevic. 1966. Predatory behavior of Philo-dromus rufus Walkenaer (Aranea: Thomisidae). Can. Entomol. 98: 113–133.
Holling, C. S. 1959. Some characteristics of simple types of predation and parasitism. Can. Entomol. 91: 385–398.
Jensen, C. X. J. and L. R. Ginzburg. 2005. Paradoxes or theoretical failures? The jury is still out. Ecol. Model. 188: 3–14.
Jensen, C. X. J., J. M. Jeschke, and L. R. Ginzburg. 2007. A direct experimental test of resource vs. consumer dependence: comment. Ecology 88: 1600–1602.
Jeschke, J. M., M. Kopp, and R. Tollrian. 2004. Consumer-food systems: why type I functional response are exclusive to filter feeders. Biol. Rev. 79: 337–349.
Johnsen, G. H. and K. Y. Børseim. 1988. Functional response and food selection of the water flea, Bosmina longispina. J. Plankton Res. 10: 319–325.
Juliano, S. A. and F. M. Williams. 1987. A comparison of methods for estimating the functional-response parameters of the random predator equation. J. Anim. Ecol. 56: 641–653.
Kisdi, E. and S. Liu. 2006. Evolution of handling time can destroy the coexistence of cycling predators. J. Evolution. Biol. 19: 49–58.
Kratina, P., M. Vos, and B. R. Anholt. 2007. Species diversity modulates predation. Ecology 88: 1917–1923.
Kfivan, V. and S. Diehl. 2005. Adaptive omnivory and species coexistence in tri-trophic food webs. Theor. Popul. Biol. 67: 85–99.
Mols, C. M. M., K. van Oers, L. M. A. Witjes, C. M. Lessells, P. J. Drent, and M. E. Visser. 2004. Central assumptions of predator-prey models fail in a semi-natural experimental system. P. Roy. Soc. Lond. B. 271: S85–S87.
Mori, H. and D. A. Chant. 1966. The influence of prey density, relative humidity, and starvation on the predaceous behavior of Phy-toseiulus persimilis Athias-Henriot (Acarina: Phytoseiidae). Can. J.Zool. 44: 483–491.
Murdoch, W. W., C. J. Briggs, and R. M. Nisbet. 2003. Consumer-resource dynamics Princeton Univ. Press, Princeton, NJ.
Murdoch, W. W., R. M. Nisbet, E. McCauley, A. M. deRoos, and W. S. C. Gurney. 1998. Plankton abundance and dynamics across nutrient levels: Tests of hypotheses. Ecology 79: 1339–1356.
Okuyama, T. 2009. Local interactions between predators and prey call into question commonly used functional responses. Ecol. Model. 220: 1182–1188.
Rosenzweig, M. L. 1971. Paradox of enrichment: destabilization of exploitation ecosystems in ecological time. Science 171: 385–387.
Rosenzweig, M. L. and R. H. MacArthur. 1963. Graphical representation and stability condition for predator-prey interactions. Am. Nat. 97:209–223.
Saha, N., G. Aditya, A. Bal, and G. K. Saha. 2007. Comparative study of functional response of common hemipteran bugs ofeast Calcutta wetlands, India. Int. Rev. Hydrobiol. 92: 242–257.
Samu, F. 1993. Wolf spider feeding strategies: optimality of prey consumption in Pardosa hortensis. Oecologia 94: 139–145.
Samu, F. and Z. Bíró. 1993. Functional response, multiple feeding and wasteful killing in a wolf spider (Araneae: Lycosidae). Eur. J. Entomol. 90: 471–476.
Schenk, D. and S. Bacher. 2002. Functional response of a generalist insect predator to one of its prey species in the field. J. Anim. Ecol. 71: 524–531.
Schenk, D., L.-F. Bersier, and S. Bacher. 2005. An experimental test of the nature of predation: neither prey- nor ratio-dependent. J. Anim. Ecol. 74: 86–91.
Smart, S. L., R. A. Stillman, and K. J. Norris. 2008. Measuring the functional responses of farmland birds: an example for a declining seed-feeding bunting. J. Anim. Ecol. 77: 687–695.
Sponaugle, S. and P. Lawton. 1990. Portunid crab predation on juvenile hard clams: effects of substrate type and prey density. Mar. Ecol.-Prog. Ser. 67: 43–53.
Tully, T., P. Cassey, and R. Ferrière. 2005. Functional response: rigorous estimation and sensitivity to genetic variation in prey. Oikos 111: 479–487.
Turchin, P. 2003. Complex Population Dyanmics: A Theoretical/Empirical Synthesis. Princeton Univ. Press, Princeton, NJ.
van Rijn, P. C., F. M. Bakker, W. A. D. van der Hoeven, and M. W. Sabelis. 2005. Is arthropod predation exclusively satiation-driven? Oikos 109: 101–116.
Vos, M., S. M. Berrocal, F. Karamaouna, L. Hemerik, and L. E. M. Vet. 2001. Plant-mediated indirect effects and the persistence of parasitoid-herbivore communities. Ecol. Lett. 4: 38–45.
Wong, M. C. and M. A. Barbeau. 2006. Rock crab predation of juvenile sea scallops: the functional response and its implications for bottom culture. Aquacult. Int. 14: 355–376.
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Okuyama, T. Prey density-dependent handling time in a predator-prey model. COMMUNITY ECOLOGY 11, 91–96 (2010). https://doi.org/10.1556/ComEc.11.2010.1.13
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DOI: https://doi.org/10.1556/ComEc.11.2010.1.13