|
|
|
| Registros recuperados: 43 | |
|
| |
|
|
| Rodrigues,Ebenezer Barbosa; Consolaro,Hélder. |
| Distyly is a genetically controlled floral dimorphism, characterized by the reciprocal positioning of pin and thrum morphs, a heteromorphic incompatibility system and a balanced morph ratio (isoplethy). This study aimed to investigate the phenology, features of distyly, reproductive biology, and floral visitors of Psychotria goyazensis Mull. Arg. (Rubiaceae), an intramorph self-compatible species, in a tropical semideciduous forest in the municipality of Catalão, located in the state of Goiás, Brazil. The phenology was recorded for a sample of individuals, the floral morphology being described using fresh and fixed material. The incompatibility system was tested using controlled hand pollinations. Floral visitors were collected and identified. Blooming... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heterostyly; Monomorphism; Cerrado; Reproductive biology. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100016 |
| |
|
| |
|
| |
|
|
| CAMPOS, Z. M. da S.. |
| A Iguana iguana tem uma grande área de distribuição geográfica, desde o sul do México até o sul da Argentina. Em alguns países, como a Venezuela, Panamá, Nicarágua e a Guatemala as iguanas têm um papel no desenvolvimento socioeconômico das comunidades rurais, no aproveitamento do couro, carne e ovos (Divers 1995). No Brasil, a espécie é conhecida como sinimbu ou camaleão, e tem distribuição na região Amazônica, parte da região Centro-Oeste, Pantanal, e na Caatinga (Avila-Pires 1995). A espécie não sofre pressão de caça intensa, principalmente pela falta de tradição como alternativa alimentícia pelas comunidades rurais. No entanto, existem relatos de consumo de ovos por algumas comunidades ribeirinhas da Amazônia. Por outro lado, certas populações... |
| Tipo: Folhetos |
Palavras-chave: Iguana; Biologia reprodutiva; Densidade; Rio Paraguai; Brasil; Reproductive biology; Fauna; Brazil; Paraguay River; Pantanal; Wetlands. |
| Ano: 2003 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/811019 |
| |
|
|
| CAMPOS, Z. M. da S.; MOURÃO, G. de M.. |
| O jacaré-do-papo-amarelo, Caiman latirostris, tem ampla distribuição geográfica em países da América do Sul - Bolívia, Paraguai, Brasil, Argentina e Uruguai. (Medem, 1983). No Brasil, ocorre naturalmente nas bacias do São Francisco e Paraná, e é considerada ameaçada de extinção, devido à destruição de seu habitat e à caça ilegal (Groombridge, 1987). A biologia reprodutiva do jacaré-do-papo-amarelo na natureza é pobremente conhecida (Thorbjarnarson, 1992) e essas informações são necessárias para definição de planos de conservação da espécie. O levantamento aéreo de ninhos é freqüentemente usado em estudos de crocodilos e alligators (Bayliss, 1987; Campos, 1993; Mourão e Campos, 1995). Os objetivos desse estudo foram localizar os ninhos na vegetação... |
| Tipo: Folhetos |
Palavras-chave: Biologia reprodutiva; Rio Paraná; Yacare; Reproductive biology; Jacaré; Caiman latirostris; Parana River. |
| Ano: 2004 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/811095 |
| |
|
|
| Bentancourt,Carlos M.; Scatoni,Iris B.; Gonzalez,Alvaro; Franco,Jorge. |
| The effect of seven natural diets on the development and reproduction of Bonagota cranaodes (Meyrick) was evaluated under laboratory conditions. The experiments were carried out at the temperature of 23 ± 1ºC, with 70 ± 10% of RH and a photoperiod of 16:8h (L:D). The larvae were reared on apple, grapevine and honeysuckle (Lonicera japonica). On the first two foods three types of diet were used: spring leaves, summer leaves and fruits. The number of instars varied from five to seven. The larvae reared on apple leaves had, in general, fewer instars than those reared on grapevine and honeysuckle leaves. The duration of larval development differed between diets. The larvae reared on spring apple leaves showed the shortest duration, and those on fruit the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Leafroller; Diet; Host plant; Immature stage; Reproductive biology. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2004000300004 |
| |
|
| |
|
| |
|
| |
|
|
| Vitali,Maria de Jesus; Dutra,João Clovis Stanzani; Machado,Vera Lígia Letízio. |
| A study of the reproductive biology of B. chinensis (L.) DC. (Iridaceae) was realized comprising floral biology and breeding systems. The floral biology studies included analyses of nectar production, occurence of osmophores, corolla pigments, ultraviolet reflexion and absortion patterns, viability of pollen, pollinators and flower visitors. The breeding systems were studied taking into account the results of manual pollinators tests. B. chinensis is self-compatible bul cross-pollination is more frequent. The effective pollinators are Plebeia droryana (Friese, 1906) (45,7%), Trigona spinipes (Fabricius, 1793) (27,3%), Tetragonisca angustula (Latreille, 1811) (9,3%). Others insects visitors are considered nectar and pollen thieves. The flowering begins... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Belamcanda chinensis; Pollination; Insect visitors; Floral biology; Reproductive biology. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751995000200003 |
| |
|
|
| Oliveira,Mário Vitor; Costa-Souza,Ana Carla; Mariano,Rodolfo; Almeida,Alexandre Oliveira. |
| Abstract Studies on fecundity and embryo size have been frequently used to infer about the reproductive potential, embryogenesis, and the energy investment in embryo production in crustaceans. These parameters are relevant to the knowledge of life-history and diversity of reproductive strategies developed by this group. This study addressed the embryo production by the estuarine shrimp Salmoneus carvachoiAnker, 2007, a poorly known caridean shrimp. We investigated whether there was (1) a correlation between fecundity and carapace length, (2) an increase in embryo volume along the embryonic development, and (3) loss of embryos along development. In addition, we investigated whether the esternite length and height and width of the pleura of the second... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caridea; Abdominal space; Embryogenesis; Reproductive biology; Reproductive potential. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100243 |
| |
|
|
| Krings, M.; Taylor, T.N.; Dotzler, N.. |
| Molecular clock data indicate that the first zygomycetous fungi occurred on Earth during the Precambrian, however, fossil evidence of these organisms has been slow to accumulate. In this paper, the fossil record of the zygomycetous fungi is compiled, with a focus on structurally preserved Carboniferous and Triassic fossils interpreted as zygosporangium-gametangia complexes and resembling those of modern Endogonales. Enigmatic microfossils from the Precambrian to Cenozoic that have variously been interpreted as, or compared to, zygomycetous fungi are also discussed. Among these, the spherical structures collectively termed ‘sporocarps’ are especially interesting because of their complex investments and abundance in certain Carboniferous and Triassic rocks.... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Endogonales; Fossil record; Morphology; Reproductive biology; Sporocarp; Zygosporangium-gametangia complex. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/532004 |
| |
|
|
| Zanella,Camila M.; Janke,Aline; Palma-Silva,Clarisse; Kaltchuk-Santos,Eliane; Pinheiro,Felipe G.; Paggi,Gecele M.; Soares,Luis E.S.; Goetze,Márcia; Büttow,Miriam V.; Bered,Fernanda. |
| Bromeliaceae is a morphologically distinctive and ecologically diverse family originating in the New World. Three centers of diversity, 58 genera, and about 3,140 bromeliad species are currently recognized. We compiled all of the studies related to the reproductive biology, genetic diversity, and population structure of the Bromeliaceae, and discuss the evolution and conservation of this family. Bromeliads are preferentially pollinated by vertebrates and show marked variation in breeding systems, from predominant inbreeding to predominant outcrossing, as well as constancy in chromosome number (2n = 2x = 50). Autogamous or mixed mating system bromeliads have a high inbreeding coefficient (F IS), while outcrossing species show low F IS. The degree of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bromeliads; Cytogenetics; Genetic diversity; Population structure; Reproductive biology. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600017 |
| |
|
|
| Gastón FIAD,Federico; CAREZZANO,Fernando José; CARDOZO,Miriam; RODRÍGUEZ,Claudia Susana. |
| ABSTRACT Triatoma infestans and Triatoma platensis are interfertile species that frequently share ecotopes and produce natural fertile hybrids. Interspecific crossing allows the production of more suitable hybrid genotypes capable of colonizing new habitats. Therefore, studies of reproductive aspects in hybrids are of great importance. In this sense, oogenesis, a process that involves the development of the oocyte and allows the formation of viable eggs, is a relevant aspect. In this study, histological aspects focused on the follicular development of experimental hybrids were characterized. To do this, the ovaries of35 hybrid females were removed, paraffin-embedded and stained with hematoxylin-eosin. The development of the follicular epithelium and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oogenesis; Ovarian cycle; Reproductive biology; Triatominae. |
| Ano: 2021 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000300462 |
| |
|
| |
|
| |
|
| |
|
| |
| Registros recuperados: 43 | |
|
|
|
