Distribution of attacks and egg galleries by the spruce beetle around the hole of windthrown trees
Keywords:
Spruce beetle, attacks, circular distribution, survival, samplingAbstract
The distribution of attack density and egg gallery length by the spruce beetle around the bole of windthrown spruce trees was investigated in central British Columbia. In windthrown trees that are oriented north-south or east-west, the circular distributions of both attack density and egg gallery length were significantly different from the uniform distribution. The mean directions for the center of n1ass of the distributions suggest an evolved preference by the spruce beetle for establishing broods relative to habitat quality. The preferred habitats for brood establishment were the shaded bottoms and lower sides of windthrown trees. This finding is consistent with the hypothesis that attack preference is a function of solar insulation during the attack period.References
Batschelet, E. 1965. Statistical methods for the analysis of problems in animal orientation and certain biological rhythms. The American Institute of Biological Sciences, 3900 Wisconsin Avenue, Washington, D.C. 57 pp.
Bright, D. E1976. The bark beetles of Canada and Alaska. Biosystematics Research Institute Research Branch, Canada Department of Agriculture Ottawa. Publication 1576. 241 p.
Dyer, E. D. A. and D.W. Taylor. 1968. Attractiveness of logs containing female spruce beetles, Dendrocto— nus obesus (Coleoptera: Scolytidae). The Canadian Entomologist 100:769-776.
Safranyik, L. and D.A. Linton. 1983. Brood production by three spp. of Dendroctonus (Coleoptera: Scolytidae) in bolts from host and non-host trees. Journal of the Entomological Society of British Columbia 80:10-13.
Safranyik, L. and D.A. Linton. 1985. Influence of competition on size, brood production and sex ratio in spruce beetles (Coleoptera: Scolytidae). Journal of the Entomological Society of British Columbia 82:52-56.
Safranyik, L. and D.A. Linton. 1987. Patterns of landing of spruce beetles, Dendroctonus rufipennis (Coleoptera: Scolytidae), on baited lethal trap trees. Jourr1al of the Entomological Society of British Columbia 84:21-32.
Safranyik, L. and D.A. Linton. 1988. Distribution of attacks on spruce stumps by the spruce beetle, Dendroctonus rufipennis Kirby (Coleoptera: Scolytidae), and effects on length of egg galleries. The Canadian Entomologist 120:85-94.
Safranyik, L. and D.A. Linton.l999. Spruce beetle (Coleoptera: Scolytidae) survival in stumps and windfall. The Canadian Entomologist 13 1:107-113.
Schrnid, J .M. 1981. Spruce beetles in blowdown. USDA Forest Service Rocky mountain Forest and Range Experiment Station Fort Collins, Colorado. Research Note RM-411. 6 pp.
Shepherd, R.F. 1965. Distribution of attacks by Dendroctonus ponderosae Hopk. on Pmus contorta Dougl. var. latifiolia Engelm. The Canadian Entomologist 97:207-215.
Stathers, R.J.; T.P. Rollerson, and S.J. Mitchell. 1994. Windthrow handbook for British Columbia. B. C. Ministry of Forests, Victoria, B.C. Working Paper 940. 131 pp.
Wood, S. L. 1982. The bark and ambrosia beetles of North and Central America (Coleoptera: Scolytidae), a taxonomic monograph. Great basin Naturalist Memoirs Number 6. Brigham Young University, Provo, Utah. 1359 pp.
Downloads
Published
Issue
Section
License
Authors who publish with the Journal of the Entomological Society of British Columbia agree to the following terms:
-Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
-Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
-Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).
