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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleDaily activity schedule, gregariousness, and defensive behaviour in the Neotropical harvestman Goniosoma longipes (Opiliones : Gonyleptidae)pt_BR
dc.contributor.authorMachado, Gpt_BR
dc.contributor.authorRaimundo, RLGpt_BR
dc.contributor.authorOliveira, PSpt_BR
unicamp.authorUniv Estadual Campinas, Dept Zool, BR-13083970 Campinas, SP, Brazilpt_BR
dc.subjectdefensive behaviourpt_BR
dc.subjectactivity rhythmspt_BR
dc.subject.wosCavernicolous Harvestmanpt_BR
dc.subject.wosBrazil Arachnidapt_BR
dc.description.abstractIn this paper we provide a field account of some aspects of the behavioural biology of Goniosoma longipes (Roewer), a harvestman which commonly occurs in caves in South-east Brazil. During daytime, solitary and aggregated individuals can be found resting on the cave walls. Just after sunset, however, many individuals leave the cave to forage for live and dead arthropods. Foraging individuals return to the cave before dawn. Aggregations of G. longipes contain on average 34 individuals (range 7-200), and the groups are usually found close to the water source and away from the cave entrance. The main predators of G. longipes are the spider Ctenus fasciatus Mello-Leitao (Ctenidae) and the opossum Philander opossum (L.) (Didelphidae). Upon disturbance solitary and aggregated individuals may either flee, or drop from the cave wall or vegetation. The harvestmen can also release a repugnatory liquid upon manipulation, and aggregated individuals collectively discharge this secretion toward the aggressor before fleeing. The activity schedule of G, longipes shows that individuals need to leave the cave periodically to forage, and therefore the population can be considered trogloxene. Data on the food items collected by G. longipes indicate that the harvestman is a generalist predator which also feeds on dead animal matter. Gregarious behaviour is considered relatively common among harvestmen and has been interpreted in several ways. We suggest that gregarious behaviour in G. longipes may be related with the choice of more suitable microconditions in the cave habitat and/or with group chemical
dc.relation.ispartofJournal Of Natural Historypt_BR
dc.relation.ispartofabbreviationJ. Nat. Hist.pt_BR
dc.publisherTaylor & Francis Ltdpt_BR
dc.identifier.citationJournal Of Natural History. Taylor & Francis Ltd, v. 34, n. 4, n. 587, n. 596, 2000.pt_BR
dc.sourceWeb of Sciencept_BR
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dc.description.provenanceMade available in DSpace on 2015-11-26T17:28:02Z (GMT). No. of bitstreams: 2 WOS000086417400003.pdf: 296437 bytes, checksum: f763547c926fd9b01200587dfa7a4a4a (MD5) WOS000086417400003.pdf.txt: 29412 bytes, checksum: 4bda53eb5991bf9ba99e83a40f49564d (MD5) Previous issue date: 2000en
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