Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil
We investigated the characteristics of the stabilimenta constructed by two species of Cyclosa, describing the variations within and among five populations. Both species constructed stabilimenta composed entirely of silk (linear and spiral types) or of silk and debris (linear, detritus clusters and c...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Psyche: A Journal of Entomology |
| Online Access: | http://dx.doi.org/10.1155/2012/396594 |
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| author | Marcelo O. Gonzaga João Vasconcellos-Neto |
| author_facet | Marcelo O. Gonzaga João Vasconcellos-Neto |
| author_sort | Marcelo O. Gonzaga |
| collection | DOAJ |
| description | We investigated the characteristics of the stabilimenta constructed by two species of Cyclosa, describing the variations within and among five populations. Both species constructed stabilimenta composed entirely of silk (linear and spiral types) or of silk and debris (linear, detritus clusters and complex types). The vertical linear detritus type was the most frequent structure for adult females of both species, whereas stabilimenta consisting of detritus clusters were more frequent for juveniles of C. morretes. The latter structures appeared to be an intermediate state towards the linear continuous type usually found in adults. The other types were rarely found, and silk stabilimenta were to be constructed only when detritus was not available. The substitution of silk by detritus indicated that both materials function as camouflage in C. morretes and C. fililineata webs. The positions occupied by the spiders within the detritus column (and in some cases the orientation of the stabilimenta) varied markedly within populations, and the unpredictability of their location could be important in reducing the risks of predation. The hypothesis that stabilimenta constitute defensive devices was indirectly corroborated by the observation that spider’s body width and length were, respectively, strongly correlated with the width and length of the stabilimenta. |
| format | Article |
| id | doaj-art-497e9e40bb6a4a39b5a4867c40699068 |
| institution | Kabale University |
| issn | 0033-2615 1687-7438 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Psyche: A Journal of Entomology |
| spelling | doaj-art-497e9e40bb6a4a39b5a4867c406990682025-02-03T05:44:24ZengWileyPsyche: A Journal of Entomology0033-26151687-74382012-01-01201210.1155/2012/396594396594Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern BrazilMarcelo O. Gonzaga0João Vasconcellos-Neto1Instituto de Biologia, Universidade Federal de Uberlândia, Campus Umuarama, Bloco 2D, 38400-902 Uberlândia, MG, BrazilDepartamento de Biologia Animal-IB, Universidade Estadual de Campinas, Caixa Postal 6109, 13083-970 Campians, SP, BrazilWe investigated the characteristics of the stabilimenta constructed by two species of Cyclosa, describing the variations within and among five populations. Both species constructed stabilimenta composed entirely of silk (linear and spiral types) or of silk and debris (linear, detritus clusters and complex types). The vertical linear detritus type was the most frequent structure for adult females of both species, whereas stabilimenta consisting of detritus clusters were more frequent for juveniles of C. morretes. The latter structures appeared to be an intermediate state towards the linear continuous type usually found in adults. The other types were rarely found, and silk stabilimenta were to be constructed only when detritus was not available. The substitution of silk by detritus indicated that both materials function as camouflage in C. morretes and C. fililineata webs. The positions occupied by the spiders within the detritus column (and in some cases the orientation of the stabilimenta) varied markedly within populations, and the unpredictability of their location could be important in reducing the risks of predation. The hypothesis that stabilimenta constitute defensive devices was indirectly corroborated by the observation that spider’s body width and length were, respectively, strongly correlated with the width and length of the stabilimenta.http://dx.doi.org/10.1155/2012/396594 |
| spellingShingle | Marcelo O. Gonzaga João Vasconcellos-Neto Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil Psyche: A Journal of Entomology |
| title | Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil |
| title_full | Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil |
| title_fullStr | Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil |
| title_full_unstemmed | Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil |
| title_short | Variation in the Stabilimenta of Cyclosa fililineata Hingston, 1932, and Cyclosa morretes Levi, 1999 (Araneae: Araneidae), in Southeastern Brazil |
| title_sort | variation in the stabilimenta of cyclosa fililineata hingston 1932 and cyclosa morretes levi 1999 araneae araneidae in southeastern brazil |
| url | http://dx.doi.org/10.1155/2012/396594 |
| work_keys_str_mv | AT marceloogonzaga variationinthestabilimentaofcyclosafililineatahingston1932andcyclosamorreteslevi1999araneaearaneidaeinsoutheasternbrazil AT joaovasconcellosneto variationinthestabilimentaofcyclosafililineatahingston1932andcyclosamorreteslevi1999araneaearaneidaeinsoutheasternbrazil |