Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Spatial distribution and substrate selection by the orb-weaver spider Eustala perfida Mello-Leitao, 1947 (Araneae: Araneidae)

Full text
Author(s):
Messas, Y. F. [1] ; Souza, H. S. [1] ; Gonzaga, M. O. [2] ; Vasconcellos-Neto, J. [3]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, IB, Campinas, SP - Brazil
[2] Univ Fed Uberlandia, Inst Biol, BR-38400 Uberlandia, MG - Brazil
[3] Univ Estadual Campinas, IB, Dept Anim Biol, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Journal of Natural History; v. 48, n. 43-44, p. 2645-2660, NOV 25 2014.
Web of Science Citations: 3
Abstract

Spider habitat types are often restricted by specific biotic and/or abiotic factors. Abiotic physical limitations include temperature and humidity; and biological conditions influencing spider habitat include vegetation type, natural enemies and prey availability. The orb-weaver spider, Eustala perfida (Araneidae), typically builds its web against tree trunks, where it is highly camouflaged. In the present study, we evaluated E. perfida spatial distribution and substrate selection in Serra do Japi, an Atlantic Forest region located in Jundiai (Sao Paulo, Brazil). We established plots within and at the forest edge at three altitudes, and measured trunk diameter, web height above ground level, presence of trunk concavities, and spider number in trees within plots. Eustala perfida occurred at all three altitudes, and was more common at the intermediate elevation. All individuals were observed within the forest interior, with the highest occurrence on trunks with diameter at breast height >30cm. Trunk diameter varied among sites, and E. perfida distribution apparently followed large trunk availability. On large diameter trunks, spiders typically placed their webs over concavities, and tended to build in rough areas covered by lichens and mosses at levels as high as \~{}150cm above ground level. Selection of large rough trunks covered by lichens and mosses is probably an adaptation to remain concealed from visually oriented predators. (AU)

FAPESP's process: 11/15457-0 - Natural history and population ecology of Eustala perfida Mello-Leitão, 1947 (Araneae, Araneidae) in Serra do Japi, Jundiaí - SP
Grantee:Yuri Fanchini Messas
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/15456-4 - Biology and ecology of Eustala taquara (keyserling, 1982), (Araneae, Araneidae) in Serra do Japi, Jundiaí - SP
Grantee:Hebert da Silva Souza
Support type: Scholarships in Brazil - Master
FAPESP's process: 11/02537-6 - Natural history of Eustala SP1 (Araneae, Araneidae)
Grantee:Hebert da Silva Souza
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 11/02535-3 - Natural history of Eustala sp2 (Araneae, Araneidae)
Grantee:Yuri Fanchini Messas
Support type: Scholarships in Brazil - Scientific Initiation