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| Registros recuperados: 10 | |
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| Peruquetti,Rui Carlos; Del Lama,Marco Antônio. |
| Two populations of the wasp Trypoxylon rogenhoferi Kohl, 1884 from São Carlos and Luís Antônio, State of São Paulo, Brazil, were observed and sampled from May 1999 to February 2001 using trap-nests. This mass-provisioning wasp was used to test some aspects of optimal sex allocation theory. Both populations fit all the predictions of the models of Green and Brockmann and Grafen. Maternal provisions determined the size of each offspring, and females allocated well-stocked brood cells to daughters, the sex that benefits most being large. This strategy resulted in a difference in size between the sexes. In São Carlos, female weight at emergence was 1.18 times that of males, in Luís Antônio this value was 1.13. The brood cell volume was correlated with both... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Body size; Cerrado; Mass provisioning; Sex ratio; Trap-nesting wasp. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000400008 |
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| Peruquetti,Rui Carlos; Del Lama,Marco Antônio. |
| Twenty-two nests of Trypoxylon asuncicola were sampled in Viçosa, State of Minas Gerais, Brazil, in January 2000 and the occupants' behavior of three nests was registered in 2h of direct observation. 528 brood cells were excavated (24±13.84 SD cells per nest), 129 were reused cells, some of them for seven times (meconium deposit count). The mean number of total cells, mean number of open and closed cells, parasitism rate and mean number of reused cells per nest were similar between old and new nests. Parasitism rate and cell reuse were associated with the number of building cells in the nest, but nest aggregate in the sampled area may play some role in the parasitism rate. Brachymeria sp. (Chalcididae) was the most important agent of brood mortality (80%).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nesting biology/parasitism; Nesting biology/social behavior; Sphecidae; Trypoxylon. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262003000200018 |
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| Bezerra,José Maurício Dias; Peruquetti,Rui Carlos; Kerr,Warwick Estevam. |
| Forty six beetles Scotocryptus melitophilus Reitter, 1881 collected in a nest of Melipona quadrifasciata Lepeletier, 1836 were studied. All beetles were put together in a large petri dish with 14 males, 14 virgin queens and 14 workers of M. quadrifasciata, which was not aggressive towards the S. melitophilus and flew with 3 to 10 beetles attached to them. When groups of 20 workers, 20 males and 20 virgin queens were put separately in three petri dishes, the workers become attractive to beetles after they were seven days old, while the males after the 19 days old. Only one virgin queen five days old attracted one beetle. The anatomic parts of the workers bees more attractive to the beetles when smeared to a filter paper were the head (32%), abdomen (29%)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Scotocryptus; Melipona; Adaptive behavior; Phoresy; Caste. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752000000100016 |
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| Peruquetti,Rui Carlos; Campos,Lúcio Antônio de Oliveira. |
| Nests of orchid bee Euplusia violacea (Blanchard, 1840) colleted in trap-nests and in the wood of a construction in Viçosa, Minas Gerais (20º45'30"S, 42º52'05"W), Brazil, were studied under laboratory condictions. Some aspects of the biology of these bees were observed, such as sex-ratio, development time, Iongevity and others. Some aspects of the behavior of E. violada were also studied. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apoidea; Euglossini; Euplusia violacea; Euglossine nest; Behavior. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100009 |
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| Peruquetti,Rui Carlos; Campos,Lúcio Antonio de Oliveira; Coelho,Claudia Diniz Pinto; Abrantes,Célio Vicente Machado; Lisboa,Luciane Cristina de Oliveira. |
| Collection data of Euglossinae males from Parque Estadual do Rio Doce (PERD) and Viçosa, both areas with remnants of Atlantic Rain Forest (Mata Atlântica) in Minas Gerais state, Brazil are presented. Comparisons made among three fragments with different sizes and states of disturbance from Viçosa showed differences in abundance of most common species and apparently, Eulaema nigrita Lepeletir, 1841 can be an useful indicator of disturbed sites. Some populations of euglossine bees seems to be restrict to a forest fragment, there being few or no flow of individuals or species of one fragment to another, even when they are only 1 km apart. 15 species of euglossines were sampled in PERD, and the most abundant was Eulaema cingulata (Fabricius, 1804). At Viçosa,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; Euglossini; Atlantic Forest; Conservation; Bioindicator. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600012 |
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| Peruquetti,Rui Carlos. |
| It was compared body size (measured as intertegular span) variance of trapped-males of Eulaema nigrita Lepeletier, 1841 sampled in dry (July, August and September) and wet (December, January and February) seasons of the years 1988/89 and 1994/95 in Viçosa (Minas Gerais, Brazil). It was also compared the body size variance between males and females sampled in three nests found in São Carlos (São Paulo, Brazil) and between these males and trapped ones. The smaller male (6.4 mm) was sampled in June and the bigger (8.9 mm) in July 1994, but the majority (32.3%) showed an intertegular span ranging from 7.8 to 8.0mm. The observed variance in body size was similar between males sampled in nests and trapped-males and the variance found inside a nest was similar... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; ENSO; Maternal allocation; Orchid bee; Sex-allocation. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200006 |
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| Peruquetti,Rui Carlos. |
| Males of Euglossa mandibularis Friese, 1899 can be categorized by (1) presence or (2) absence of scutellar tuft (a morphological feature of dense setae found in females' scutellum of the genera Euglossa Latreille, 1802 and Eulaema Lepeletier, 1841). A multivariate statistical analysis using six morphological measures (hindtibia length and width, head width, intertegular span, midbasitarsus length and scape length) show that males of the categories 1 and 2 were significantly different in relation to such measures. The width head, hindtibia length and scape length were the measures that most influenced the observed differences. Levene test suggest there is not effect of stabilizing selection on males without scutellar tuft. Since there is a fluctuation in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apidae; Euglossini; Euglossa; Male dimorphism. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400028 |
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| Registros recuperados: 10 | |
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