Abstract
We tested the hypothesis that increased habitat complexity would reduce intraspecific interactions among crayfish (Orconectes propinquus), and result in an increase in the consumption rate of prey at different crayfish densities. The effect of crayfish density, food level (trout eggs), and habitat complexity on prey consumption by crayfish was quantified in the laboratory. There was a significant difference in the consumption rate between different food levels. When food was scarce, almost all trout eggs were consumed regardless of crayfish density or habitat complexity. When food was unlimited, there was a significant positive linear relationship between eggs consumed per crayfish and habitat complexity. However, the relationship was not significant when trials without habitat were deleted from the analysis. We found that habitat complexity significantly reduced intraspecific aggression. Our findings suggest that a minimal amount of habitat complexity can reduce interactions among predators, ultimately resulting in increased prey consumption.
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References
Anderson O (1984) Optimal foraging by largemouth bass in structured environments. Ecology 65:851–861
Basquill SP, Grant JWA (1998) An increase in habitat complexity reduces aggression and monopolization of food by zebra fish (Danio rerio). Can J Zool 76:770–772
Bovbjerg RV (1959) Density and dispersal in laboratory crayfish populations. Ecology 40:504–506
Bovbjerg RV (1964) Dispersal of aquatic animals relative to density. Verh Internat Verein Limnol 15:879–884
Brown PB, Wilson KA, Wetzel JE, Hoene B (1995) Increased densities result in reduced weight grain of crayfish Orconectes virilis. J World Aquacult Soc 26:165–171
Caley MJ, St. John J (1996) Refuge availability structures assemblages of tropical reef fishes. J Anim Ecol 65:414–428
Christensen B, Persson L (1993) Species-specific antipredatory behaviours: effects of prey choice in different habitats. Behav Ecol Sociobiol 32:1–9
Fraser D, Kramer DL, Pajor EA, Weary DM (1995) Conflict and cooperation: sociobiological principles and the behaviour of pigs. Appl Anim Behav Sci 44:139–157
Gotceitas V, Colgan P (1989) Predator foraging success and habitat complexity: a quantitative test of the threshold hypothesis. Oecologia 80:158–166
Guiasu RC, Dunham DW (1997) Initiation and outcome of agonistic contests in male form 1 Cambarus robustus Girard, 1852 crayfish (Decapoda, Cambaridae). Crustaceana 70:480–496
Hassell MP (1978) The dynamics of arthropod predator-prey systems. Princeton University Press, Princeton, N.J.
Hixon MA, Menge BA (1991) Species diversity: prey refuges modify the interactive effects of predation and competition. Theor Popul Biol 39:178–200
Jones GP, Syms C (1998) Disturbance, habitat structure and the ecology of fishes on coral reefs. Aust J Ecol 23:287–297
Martin GW, Corkum LD (1994) Predation of zebra mussels by crayfish. Can J Zool 72:1867–1871
Miller JE, Savino JF, Neely RK (1992) Competition for food between crayfish (Orconectes virilis) and the slimy sculpin (Cottus cognatus). J Freshw Ecol 7:127–136
Momot WT, Gowing H, Jones PD (1978) The dynamics of crayfish and their role in ecosystems. Am Midl Nat 99:10–35
Nystrom P, Bronmark C, Graneli W (1996) Patterns in benthic food webs: a role for omnivorous crayfish. Freshw Biol 36:631–646
SAS Institute (1985) SAS User's Guide Statistics Version 5. SAS Institute, Cary, N.C.
Savino JF, Miller JE (1991) Crayfish (Orconectes virilis) feeding on young lake trout (Salvelinus namaycush): effect of rock size. J Freshw Ecol 6:161–170
Savino JF, Stein RA (1982) Predator-prey interaction between largemouth bass and bluegills as influenced by simulated submersed vegetation. Trans Am Fish Soc 111:255–266
Savino JF, Stein RA (1989) Behavior of fish predators and their prey: habitat choice between open water and dense vegetation. Environ Biol Fish 24:287–293
Sih A, Englund G, Wooster D (1998) Emergent impacts of multiple predators on prey. Trends Ecol Evol 13:350–355
Swisher BJ, Soluk DA, Wahl DH (1998) Non-additive predation in littoral habitats: influences of habitat complexity. Oikos 81:30–37
Acknowledgements
We thank Jan J.H. Ciborowski, Donna J. Giberson, Ray G. Poulin and an anonymous reviewer for their comments on the manuscript. Michelle Dobrin kindly provided field assistance.
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Corkum, L.D., Cronin, D.J. Habitat complexity reduces aggression and enhances consumption in crayfish. J Ethol 22, 23–27 (2004). https://doi.org/10.1007/s10164-003-0095-x
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DOI: https://doi.org/10.1007/s10164-003-0095-x