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| Registros recuperados: 2.277 | |
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| Abdalla,Fábio Camargo; Cruz-Landim,Carminda da. |
| The Dufour gland is found closely associated with the sting apparatus of all hymenopteran females, playing multiple roles among bees. In Apis mellifera Linnaeus, 1758 the gland is connected to the dorsal vaginal wall and, in queens, it produces egg-marking pheromones. In workers the function of this gland is unknown, except by its capacity to mimic the queen secretion in egg-laying workers. In an attempt to understand the development and to substantiate the present knowledge about the Dufour gland in A. mellifera, a morphometric study of the gland between and within the female castes was made. Glands of workers and queens with different ages and life stages were dissected and measured with an ocular micrometer adapted to a stereoscope. The results showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; Dufour gland; Exocrine glands. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000500009 |
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| Abilhoa,Vinícius. |
| Neste trabalho é descrita a estrutura populacional, os hábitos alimentares e a reprodução de Astyanax scabripinnis Jenyns, 1842, baseado em coletas realizadas mensalmente entre outubro de 1998 e setembro de 1999, em um riacho das cabeceiras do rio Iguaçu. A distribuição de freqüência por classe de comprimento revelou valores diferentes entre machos (5,4-6,7 cm) e fêmeas (6,1-8,1 cm). Foram encontradas diferenças significativas para os valores do fator de condição entre os sexos, o que pode implicar em diferentes taxas de crescimento. O período reprodutivo ocorreu entre outubro e março, como já descrito para outros caracídeos da mesma região. Fragmentos de insetos terrestres, restos de vegetais superiores e larvas de insetos aquáticos foram os principais... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alimentação; Estrutura populacional; Parâmetros biológicos. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400016 |
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| Abilhoa,Vinicius; Duboc,Luiz F.; Azevedo Filho,Damil P. de. |
| Foram avaliadas a composição, a dieta, as táticas alimentares e ocupação espacial da ictiofauna em um pequeno riacho dentro de um remanescente de Floresta com Araucária. Seis espécies de peixes foram coletadas, pertencentes a três ordens e quatro famílias, totalizando 110 exemplares. No ambiente de corredeira foram coletados e observados apenas Trichomycterus castroi Pinna, 1992 and Trichomycterus davisi Haseman, 1911, enquanto que no ambiente de remanso foram observados e capturados exemplares de Astyanax aff. scabripinnis (sensu Eigenmann, 1921), Astyanax totae Haluch & Abilhoa, 2005, Trichomycterus castroi Pinna, 1992, T. davisi, Phalloceros caudimaculatus (Hensel, 1868) e Jenynsia eigenmanni Haseman, 1911. Dezoito itens alimentares de origem... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alimentação; Ecologia; Ocupação espacial; Peixes de riacho. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000200012 |
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| Absalão,Ricardo Silva; Caetano,Carlos Henrique Soares; Pimenta,Alexandre Dias. |
| The gastropods Costaclis egregia (Dall, 1889), Thaleia nisonis (Dall, 1889), Tjaernoeia michaeli Engl, 2001 and the bivalves Bathyarca sp., Myonera aff. ruginosa (Jeffreys, 1882) are recorded for the first time in Brazilian waters. This paper presents a brief description of these species and also include ilustrations. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bathyarca; Brazil; Costaclis; Marine mollusks; Myonera; New ocurrences; Thaleia; Tjaernoiea. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000200024 |
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| Absalão,Ricardo Silva; Roberg,Renata Alves Pinheiro. |
| The Littorina ziczac (Gmelin, 1791) species complex was studied in Rio de Janeiro State, southeastern Brazil. The occurrence of three species was confirmed, through the analysis of penis morphology: L. ziczac (Gmelin, 1791), L. lineata d'Orbigny, 1841 and L. lineolata d'Orbigny, 1840. There is a correlation between the morphology of the penis and shell shape, thus it was possible to make a discrimination model based in conchologic data, with an efficiency of 75%. However, this model cannot be applied to others samples that weren't included in its formulation, due to phenotypic plasticity of the shell caused by biotic and abiotic factors. In the 9 areas studied L. lineolata was always the most abundam species. No vertical stratification in the distribution... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Littorina; Species complex; Vertical distribution; Biochemistiy; Rio de Janeiro; Brazil. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200005 |
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| Absalão,Ricardo Silva; Silva,Pedro Henrique de Almeida; Paula,Thiago Silva de. |
| Six morphometric shell direct measurements of the Gadilidae species Gadila acus (Dall, 1889), Cadulus braziliensis Henderson, 1920, Cadulus parvus Henderson, 1920 and Polyschides tetraschistus (Watson, 1879) were carried out and used to build three morphometric indices in according to the proposition of SHIMEK (1989): LI, relating total shell length to length from the dorsal aperture to the maximum width; WI, relating maximum shell diameter to apertural diameter; and Ws, whorl expansion rate (sensu RAUP 1966). Direct measurements and morphometric indices were tested as discriminating tools among the four species. None of the morphometric indices, alone, were able to discriminate among all species. Among then, Ws is not an effective discriminating... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cadulus; Conchology; Gadila; Marine mollusks; Polyschides. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752005000100020 |
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| Ades,César; Kolde,Renate Edla. |
| The adjustment of Calomys callosus (Rodentia, Cricetidae) to intermittent food deprivation was investigated. Animals subjected either to 24-hr or to 48-hr repeated periods of deprivation successfully compensated, showing (1) increases in post-fast intake relatively to the intake by control animals; (2) rapid recovery of the baseline levels of body wieght. The regulatory ability of C. callosus is comparable, in such respects, to the ability of the common rat and some other rodents but it is remarkably different from the hamster's. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1989 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751989000200005 |
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| Adriano,Cavalleri; Romanowski,Helena Piccoli; Redaelli,Luiza Rodrigues. |
| This study is a contribution to the knowledge of the thysanopterofauna of southern Brazil. From June 2003 to April 2004, seasonal field trips were conducted at the Parque Estadual de Itapuã (50º50'-51º05'W and 30º20'-30º27'S), in the county of Viamão, Rio Grande do Sul, to collect shoots with/without flowers of various plant species. The material was brought to the laboratory where the thrips were sorted. A total of 23 thrips species belonging to 15 genera and two families were obtained. Nine of the species resulted as new record for Rio Grande do Sul (*), and other two also for Brazil (**). The species sampled are as follows: Aneristothrips claripennis (Moulton, 1933)*, Aurantothrips orchidearum (Bondar, 1931)*, Ceratothripoides lagoenacollus (Moulton,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation unit; Faunal record; Neotropical thysanopterofauna. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200009 |
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| Aguiar,Antonio José Camillo; Martins,Celso Feitosa. |
| The trap-nesting bees of Guaribas Biological Reserve were studied during one year. Three areas with different vegetation types were sampled, open savanas, closed forest, and a mosaic of these two types. Twelve species of trap-nesting bees were observed, four of which are parasites. The most abundant species were Centris tarsata (Smith, 1879), C. analis (Fabricius, 1804), Tetrapedia diversipes KJug, 1810, and Mesocheira bicolor (Fabricius, 1804). Nesting of Centris tarsata and Mesocheira bicolor occurred mainly during the dry season, while Centris analis and Tetrapedia diversipes did not show any seasonal preferences. Mesocheira bicolar occurred only in the nests of C. tarsata, parasitizing more than 50% of the nests and representing 23.2% of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apoidea; Apiformes; Bees; Tabuleiro; Trap-nests. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000500005 |
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| Aguiar,Cândida M. L.; Garófalo,Carlos A.; Almeida,Gesline F.. |
| O comportamento de nidificação de Centris (Hemisiella) trigonoides Lepeletier, 1841, e o comportamento de seus cleptoparasitas foram estudados em Monte Santo, Bahia, Brasil. As abelhas construíram seus ninhos com uma mistura de solo e óleo, dentro de cavidades preexistentes na madeira de uma construção abandonada, assim como em gomos de bambu de 8 e 9 mm de diâmetro. Os ninhos completados tinham de uma a cinco células alongadas, arranjadas em uma série linear e orientadas horizontalmente. O tempo gasto para construir uma célula foi altamente variável, sendo em geral de 4,5 a 5,5 h. Após finalizar a construção da célula, as fêmeas fizeram uma ou duas viagens para coletar um líquido incolor, provavelmente óleo floral, usado para revestir as paredes internas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelhas coletoras de óleo; Aprovisionamento; Cavidades; Ninhos-armadilha. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000200003 |
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| Aguiar,Cândida Maria Lima. |
| This study was designed to identify important food resource plants used by bee species in a Caatinga area, as well as describe the local patterns of floral use by bees. A total of 1,145 foraging bees, belonging to 60 species, were captured while visiting 50 plant species. Melochia tomentosa L., Sida galheirensis Ulbr., Erythroxylon catingae P. Cowan, and Ziziphus cotinifolia Reiss. were the most frequently visited plants. Melochia tomentosa, Solanum paniculatum L. and S. galheirensis were visited by larger number of bee species. Some oligolectic bees were identified. Apis mellifera Linnaeus, 1758 and Trigona spinipes (Fabricius, 1793) had the largest trophic niche breadth (2.71 and 2.31). The trophic niche overlap was highest (0.52) between Xylocopa... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bee plants; Floral visitors assemblages; Semi-arid northeastern Brazil; Trophic niche. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300015 |
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| Registros recuperados: 2.277 | |
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