Moonlight's influence on predator/prey interactions between short-eared owls (Asio flammeus) and deermice (Peromyscus maniculatus)
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This study examines the effect of moonlight intensity on deermouse (Peromyscus maniculatus) vulnerability to predation by short-eared owls (Asio flammeus).
Three nocturnal light intensities, labeled new moon, quarter moon, and full moon, were simulated in a flight chamber. Deermouse activity was observed and measured by an index of tracking intensity in the chamber's sand floor. The mice were then exposed to predation by a short-eared owl in each light intensity and search time, chase time, capture time, and the number of escapes/chase were measured.
The results reveal the adaptive significance of deermouse activity suppression in full moon light as an anti-predator response. The deermice reduced activity significantly in bright moonlight during the activity phases. During the predation phases, the owls' hunting effectiveness increased as moonlight waxed. The owls required significantly less time to search for and capture the mice as illumination increased.
The costs and benefits to both species are discussed relative to the prey's variation of activity with moonlight intensity.
KeywordsLight Intensity Activity Suppression Activity Phase Search Time Adaptive Significance
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- Bildstein KL, Althoff DP (1979) Responses of white-footed mice and meadow voles to flyovers of an aerial predator silhouette. Ohio J Sci 79:212–217Google Scholar
- Blair WF (1943) Activities of Peromyscus with relation to light intensity, J Wildl Manage 7:92–97Google Scholar
- Blair WF (1951) Population structure, social behavior and environmental relations in a natural population of the beach mouse, Peromyscus polionotus leucocephalus. Contr Lab Vert Bio Univ Michigan 48:1–47Google Scholar
- Campbell RC (1974) Statistics for biologists, 2nd edn. Cambridge University Press, New YorkGoogle Scholar
- Craighead JJ, Craighead FC (1956) Hawks, owls and wildlife. ptackpole, HarrisburgGoogle Scholar
- Doucet GJ, Bider JR (1969) Activity of Microtus pennsylvanicus related to moon phase and moonlight revealed by the sand transect technique. Can J Zool 47:1183–1186Google Scholar
- Erkert HG (1974) Der Einfluß des Mondlichtes auf die Aktivitätsperiodik nachtaktiver Säugetiere. Oecologia (Berl) 14: 269–287Google Scholar
- Falls JB (1953) Activity and local distribution of deermice in relation to certain environmental factors. PhD dissertation, University TorontoGoogle Scholar
- Falls JB (1968) Activity. In: King JA (ed) Biology of Peromyscus (Rodentia). Spec Publ Am Soc Mamm, pp 543–570Google Scholar
- Fenton MB, Boyle NGH, Harrison TM, Oxley DJ (1977) Activity patterns, habitat use, and prey selection by some African incectivorous bats. Biotropica 9:73–85Google Scholar
- Foster DD (1959) Differences in behavior and temperament between two races of the deermouse. Mammal 40:496–513Google Scholar
- Getz LL (1968) Influence of weather on the activity of the red-backed vole. J Mammal 49:565–570Google Scholar
- Jamison VC (1975) Relative susceptibility of resident and transient Peromyscus subjected to weasel predation. MS thesis University of Montana, MissoulaGoogle Scholar
- Kavanau JL (1967) Behavior of captive white-footed mice Science 155:1623–1639Google Scholar
- Lockard RB, Owings DH (1974) Moon-related surface activity of bannertail (Dipodomys spedabilis) and fresno (Dipodomys mustraloids) kangaroo rats. Anim Behav 22:262–272Google Scholar
- Metzgar LH (1967) An experimental comparison of screech owl predation on resident and transient white-footed mice (Peromyscus leucopus). J Mammal 48:387–390Google Scholar
- Morrison DW (1978) Lunar phobia in a neotropical fruit bat, Artibeus jamaicensis (Cheroptera: Phyllostomidae). Anim Behav 26:852–855Google Scholar
- O'Farrell MJ (1974) Seasonal activity patterns of rodents in a sagebrush community. J Mammal 55:809–823Google Scholar
- Owings DH, Lockard RB (1971) Different nocturnal patterns of Peromyscus californicus and Peromyscus ereminicus in lunar lighting. Psychon Sci 22:63–64Google Scholar
- Schwab RG (1966) Environmental factors affecting surface activity of the kangaroo rat (Dipodomys merriami). PhD dissertation, University of Arizona, Univ Microfilm No 60-5139Google Scholar
- Vickery WL, Bider JR (1978) The effect of weather on Sorex cinerius activity. Can J Zool 56:291–299Google Scholar
- Vickery WL, Bider JR (1981) The influence of weather on rodent activity. J Mammal 62:140–145Google Scholar