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Bourgeois behavior and freeloading in the colonial orb web spider Parawixia bistriata (Araneae, Araneidae). Repositório Alice
WENSELEERS, T.; BACON, J. P.; ALVES, D. A.; COUVILLON, M. J.; KARCHER, M.; NASCIMENTO, F. S.; NOGUEIRA NETO, P.; RIBEIRO, M. de F.; ROBINSON, E. J. H.; TOFILSKI, A.; RATNIEKS, F. W..
Spiders of the tropical American colonial orb weaver Parawixia bistriata form a communal bivouac in daytime. At sunset, they leave the bivouac and construct individual, defended webs within a large, communally built scaffolding of permanent, thick silk lines between trees and bushes. Once spiders started building a web, they repelled other spiders walking on nearby scaffolding with a bounce behavior. In nearly all cases (93%), this resulted in the intruder leaving without a fight, akin to the bourgeois strategy, in which residents win and intruders retreat without escalated contests. However, a few spiders (6.5%) did not build a web due to lack of available space.Webless spiders were less likely to leave when bounced (only 42% left) and instead attempted...
Tipo: Separatas Palavras-chave: Parawixia bistriata; Ecologia e sociabilidade.; Ecologia; Colônia.; Ecology.
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/959280
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Microbial community modulates growth of symbiotic fungus required for stingless bee metamorphosis. Repositório Alice
PALUDO, C. R.; PISHCHANY, G.; DOMINGUEZ, A.-A.; SILVA JÚNIOR, E. A.; MENEZES, C.; NASCIMENTO, F. S.; CURRIE, C. R.; KOLTER, R.; CLARDY, J.; PUPO, M. T..
Abstract: The Brazilian stingless bee Scaptotrigona depilis requires the brood cells-associated fungus Zygosaccharomyces sp. as steroid source for metamorphosis. Besides the presence of Zygosaccharomyces sp., other fungi inhabit S. depilis brood cells, but their biological functions are unknown. Here we show that Candida sp. and Monascus ruber, isolated from cerumen of S. depilis brood provisions, interact with Zygosaccharomyces sp. and modulate its growth. Candida sp. produces volatile organic compounds (VOCs) that stimulate Zygosacchromyces sp. development. Monascus ruber inhibits Zygosacchromyces sp. growth by producing lovastatin, which blocks steroid biosynthesis. We also observed that in co-cultures M. ruber inhibits Candida sp. through the...
Tipo: Artigo de periódico Palavras-chave: Abelha; Abelha Brasileira; Fungo; Metamorfose; Stingless bees; Fungi; Metamorphosis; Microbial communities.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115223
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Repeated evolution of soldier sub-castes suggests parasitism drives social complexity in stingless bees. Repositório Alice
GRÜTER, C.; SEGERS, F. H. I. D.; MENEZES, C.; VOLLET-NETO, A.; FALCÓN, T.; ZUBEN, L. von; BITONDI, M. M. G.; NASCIMENTO, F. S.; ALMEIDA, E. A. B..
The differentiation of workers into morphological castes represents an important evolutionary innovation that is thought to improve division of labor in insect societies. Given the potential benefits of task-related worker differentiation, it is puzzling that physical worker castes, such as soldiers, are extremely rare in social bees and absent in wasps. Following the recent discovery of soldiers in a stingless bee, we studied the occurrence of worker differentiation in 28 stingless bee species from Brazil and found that several species have specialized soldiers for colony defence. Our results reveal that worker differentiation evolved repeatedly during the last ~ 25 million years and coincided with the emergence of parasitic robber bees, a major...
Tipo: Separatas Palavras-chave: Evolução.; Abelha; Parasitismo..
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1065560
Registros recuperados: 3
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