BuddleWalkerRypstra2003

Reference

Buddle, C.M., Walker, S.E. and Rypstra, A.L. (2003) Cannibalism and density-dependent mortality in the wolf spider Pardosa milvina (Araneae: Lycosidae). Canadian Journal of Zoology, 81(8):1293-1297.

Abstract

Cannibalism is an important regulating mechanism in many terrestrial and aquatic arthropod communities. Spider ecologists have suggested that cannibalism with wolf spiders (Araneae: Lycosidae) in the genera Schizocosa and Pardosa is common and can act in population regulation. This hypothesis was tested with the species Pardosa milvina (Hentz), a small wolf spider that shows high densities in disturbance-driven ecosystems, including agricultural fields, throughout eastern North America. Under laboratory conditions, cannibalism was more common between pairs of P. milvina with the greatest differences in both mass and size. Field studies, in which we stocked natural densities, 2x natural densities, and 4x natural densities of P. milvina in enclosures placed in soybean fields, revealed that survival was lowest when conspecific density was highest, and larger individuals prevailed under high-density conditions. Thus, cannibalism likely plays an important role in governing populations of P. milvina, and the generality about the prevalence and importance of cannibalism with wolf spiders is supported.

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@ARTICLE { BuddleWalkerRypstra2003,
    AUTHOR = { Buddle, C.M. and Walker, S.E. and Rypstra, A.L. },
    TITLE = { Cannibalism and density-dependent mortality in the wolf spider Pardosa milvina (Araneae: Lycosidae) },
    JOURNAL = { Canadian Journal of Zoology },
    YEAR = { 2003 },
    VOLUME = { 81 },
    PAGES = { 1293-1297 },
    NUMBER = { 8 },
    NOTE = { 00084301 (ISSN) Cited By (since 1996): 8 Export Date: 26 April 2007 Source: Scopus CODEN: CJZOA doi: 10.1139/z03-124 Language of Original Document: English Correspondence Address: Buddle, C.M.; Dept. of Natural Resource Sciences; Macdonald Campus; McGill University; 21 111 Lakeshore Road Ste. Anne de Bellevue, Que. H9X 3V9, Canada; email: chris.buddle@mcgill.ca References: Anthony, C.D., Kinship influences cannibalism in the wolf spider, Pardosa milvina (2003) J. Insect Behav., 16, pp. 23-36; Benoit, H.P., McCauley, E., Post, J.R., Testing the demographic consequences of cannibalism in Tribolium confusum (1998) Ecology, 79, pp. 2839-2851; Briggs, C.J., Sait, S.M., Begon, M., Thompson, D.J., Godfray, H.C.H., What causes generation cycles in populations of stored-product moths? (2000) J. Anim. 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Mag., 106, pp. 71-73; Elgar, M.A., Crespi, B.J., (1992) Cannibalism: Ecology and Evolution among Diverse Taxa, , Oxford University Press, Oxford, U.K; Hagstrum, D.W., Carapace width as a tool for evaluating the rate of development of spiders in the laboratory and the field (1971) Ann. Entomol. Soc. Am., 64, pp. 757-760; Hallander, H., Prey, cannibalism, and microhabitat selection in the wolf spiders Pardosa chelata O.F. Mu?ller and P. pullata Clerck (1970) Oikos, 21, pp. 337-340; Jakob, E., Marshall, S.D., Uetz, G.W., Estimating fitness: A comparison of body condition indices (1996) Oikos, 77, pp. 61-67; Jormalainen, V., Shuster, S.M., Microhabitat segregation and cannibalism in an endangered freshwater isopod, Thermosphaeroma thermophilum (1997) Oecologia, 111, pp. 271-279; Littell, R.C., Milliken, G.A., Stroup, W.W., Wolfinger, R.D., (1996) SAS System for Mixed Models, , SAS Institute Inc., Cary, N.C; Marshall, S.D., Rypstra, A.L., Patterns in the distribution of two wolf spiders (Araneae: Lycosidae) in two soybean agroecosystems (1999) Environ. 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    ABSTRACT = { Cannibalism is an important regulating mechanism in many terrestrial and aquatic arthropod communities. Spider ecologists have suggested that cannibalism with wolf spiders (Araneae: Lycosidae) in the genera Schizocosa and Pardosa is common and can act in population regulation. This hypothesis was tested with the species Pardosa milvina (Hentz), a small wolf spider that shows high densities in disturbance-driven ecosystems, including agricultural fields, throughout eastern North America. Under laboratory conditions, cannibalism was more common between pairs of P. milvina with the greatest differences in both mass and size. Field studies, in which we stocked natural densities, 2x natural densities, and 4x natural densities of P. milvina in enclosures placed in soybean fields, revealed that survival was lowest when conspecific density was highest, and larger individuals prevailed under high-density conditions. Thus, cannibalism likely plays an important role in governing populations of P. milvina, and the generality about the prevalence and importance of cannibalism with wolf spiders is supported. },
    KEYWORDS = { Biodiversity Farms Population statistics Cannibalism Ecosystems cannibalism density dependence mortality spider Araneae Lycosidae Pardosa milvina Schizocosa },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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