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The role of habitat heterogeneity for the functional response of the spider Nesticodes rufipes (Araneae: Theridiidae) to houseflies
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- Rossi Marcelo N.
- Departamento de Botânica, IB, Universidade Estadual Paulista (Unesp)
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- Reigada Carolina
- Departamento de Parasitologia, IB, Universidade Estadual Paulista (Unesp)
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- Godoy Wesley A. C.
- Departamento de Parasitologia, IB, Universidade Estadual Paulista (Unesp)
Bibliographic Information
- Other Title
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- Role of Habitat Heterogeneity for the Functional Response of the Spider Nesticodes rufipes Araneae Theridiidae to Houseflies
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Description
We investigated whether or not different degrees of refuge for prey influence the characteristic of functional response exhibited by the spider Nesticodes rufipes on Musca domestica, comparing the inherent ability of N. rufipes to kill individual houseflies in such environments at two distinct time intervals. To investigate these questions, two artificial habitats were elaborated in the laboratory. For 168 h of predator-prey interaction, logistic regression analyses revealed a type II functional response, and a significant decrease in prey capture in the highest prey density was observed when habitat complexity was increased. Data from habitat 1 (less complex) presented a greater coefficient of determination than those from habitat 2 (more complex), indicating a higher variation of predation of the latter. For a 24 h period of predator-prey interaction, spiders killed significantly fewer prey in habitat 2 than in habitat 1. Although prey capture did not enable data to fit properly in the random predator equation in this case, predation data from habitat 2 presented a higher variation than data from habitat 1, corroborating results from 168 h of interaction. The high variability observed on data from habitat 2 (more complex habitat) is an interesting result because it reinforces the importance of refuge in promoting spatial heterogeneity, which can affect the extent of predator-prey interactions.
Journal
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- Applied Entomology and Zoology
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Applied Entomology and Zoology 41 (3), 419-427, 2006
JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY
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Details 詳細情報について
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- CRID
- 1390282681220889728
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- NII Article ID
- 110004761876
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- NII Book ID
- AA00543238
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- ISSN
- 1347605X
- 00036862
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- NDL BIB ID
- 8026358
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL Search
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed