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| Registros recuperados: 20 | |
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| Rodrigues,Daniele M.; Turchetto,Caroline; Callegari-Jacques,Sidia M.; Freitas,Loreta B.. |
| ABSTRACT The reproductive system of flowering plants can be highly variable, affecting their biology, gene flow and genetic variability among populations. Petunia secreta is a rare annual endemic species of Pedra do Segredo, located in the municipality of Caçapava do Sul, state of Rio Grande do Sul, Brazil. Although rare, the species possesses a high level of genetic variability. We investigated the reproductive system of P. secreta, including fruit production and seed germinability, in order to determine if its reproductive system can explain its genetic diversity. We sampled five populations and conducted five greenhouse hand-pollination treatments: 1) autonomous apomixis; 2) self-pollination; 3) hand self-pollination; 4) geitonogamy; and 5)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endogamy; Pampas; Petunia; Reproductive success; Reproductive system; Seed germinability. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200180 |
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| Aranda, Rodrigo; UFMS; Catian, Gisele; Universidade Federal de Mato Grosso do Sul; Bogiani, Paulo Alexandre; Universidade Federal de Mato Grosso do Sul; Inforzato, Igor; Universidade Federal de Mato Grosso do Sul. |
| This study had as objective to evaluate whether the pillaging activity by native bees influences floral abscission. Samples were collected in ten individuals of Bougainvillea spectabilis. In the period between May 4 and June 1st, 2009, 2,874 flowers were collected on the ground and 2,895 from the plants, with three-day intervals between each collection and a total of 10 repetitions in each plant. We measured the total of closed flowers, open flowers, robbed flowers, normal flowers, open robbed flowers and non-robber open flowers, in both soil and plant. For the statistical analysis, the T-test was used to see whether there was a difference between the averages obtained from the evaluated characteristics between the soil flowers and plant flowers. Simple... |
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Palavras-chave: 2.05.00.00-9 insect-plant interaction; Floral damage; Neotropical bees; Reproductive success; Ornamental plant Ecologia insect-plant interaction; Floral damage; Neotropical bees; Reproductive success; Ornamental plant. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8191 |
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| Thorne, Lesley H.; Hazen, Elliott L.; Bograd, Steven J.; Foley, David G.; Conners, Melinda G.; Kappes, Michelle A.; Kim, Hyemi M.; Costa, Daniel P.; Tremblay, Yann; Shaffer, Scott A.. |
| Background: Climate-driven environmental change in the North Pacific has been well documented, with marked effects on the habitat and foraging behavior of marine predators. However, the mechanistic linkages connecting climate-driven changes in behavior to predator populations are not well understood. We evaluated the effects of climate-driven environmental variability on the reproductive success and foraging behavior of Laysan and Black-footed albatrosses breeding in the Northwest Hawaiian Islands during both brooding and incubating periods. We assessed foraging trip metrics and reproductive success using data collected from 2002-2012 and 1981-2012, respectively, relative to variability in the location of the Transition Zone Chlorophyll Front (TZCF, an... |
| Tipo: Text |
Palavras-chave: Albatross; Movement; Reproductive success; Climate; Environmental variability. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00627/73882/73719.pdf |
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| Silva, Andre Luiz Gomes da; Universidade Federal do Maranhão; Chaves, Samyra Ramos; Universidade Federal do Maranhão; Brito, Jéfferson Mesquita; Universidade Federal do Maranhão. |
| The aim of this study was to investigate the reproductive biology of Bowdichia virgilioides in an area of Cerrado (Brazilian Savanna). The study was carried out in Chapadinha, State of Maranhão in northeastern Brazil. Bowdichia virgilioides has cornucopia flowering and annual pattern. Flowering occurred at the beginning of the dry season, between June and August; and fruiting in the middle of this season, between July and October. The anthesis of B. virgilioides is diurnal, and the main flower resource is the nectar. During the flower opening, the anthers becomes dehiscent and thus pollen grains are deposited at the stigma, promoting automatic self-pollination. The species is self-compatible and apomitic. In the study area, they were visited by nine... |
| Tipo: Fenologia e reprodução |
Palavras-chave: Botânica - Biologia reprodutiva breeding system; Cerrado; Pollination; Reproductive success Botânica breeding system; Cerrado; Pollination; Reproductive success. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/9003 |
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| Fracasso,Hélio Augusto Alves; Branco,Joaquim Olinto; Barbieri,Edison. |
| Cabot's Terns Thalasseus acuflavidus (Latham, 1737) are widely distributed along the Atlantic coast of South America from the Caribbean Islands (12º S) to the region of Porto Deseado, Argentina (46º S). Daily observations were conducted on the Cardos Island during 2003, 2005 and 2006 to determine timing and nesting success, and the reproductive biology of the Cabot's Terns nesting there. The first adults arrived at the colony from 22 April to 15 May during the three years recorded; a total of 144 nests were recorded in 2003, 174 in 2005 and 50 in 2006. Observed incubation time was 24.1 ± 0.35 days, and mean egg size was 5.15 ± 0.02 cm in length and 34.30 ± 0.25 g in weight. Hatching success was lowest in 2003 and highest in 2006, with natural causes (such... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Cabot's Terns; Brazil; Conservation; Reproductive success. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300005 |
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| COPETE,MIGUEL A; HERRANZ,JOSÉ M; FERRANDIS,PABLO. |
| Flower, fruit, seed production, and flowering phenology (duration, intensity, moment and synchrony) were studied in the two main populations (south east Spain) of the critically endangered endemic Mediterranean plant Coincya rupestris subsp. rupestris (Cruciferae). Production of flowers and fruits (mean ± SD) ranged from 483 (± 688) to 748 (± 636), and from 317 (± 518) to 553 (± 500), respectively, between populations. In addition, the average seed production per plant was 1,607-2,798, thus concluding that fertility was not responsible for the rarity of this taxon. The fruit/flower ratio ranged from 0.60 to 0.75, showing significant inter-population differences. Flowering extended from February-March to the end of spring, with high synchrony (= 85 %). This... |
| Tipo: Journal article |
Palavras-chave: Iberian endemism; Flowering phenology; Reproductive success; Seedling recruitment. |
| Ano: 2008 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000300004 |
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| Castiglioni,Daniela da Silva; Streck,Morgana Taís; Rodrigues,Stella Gomes; Bueno,Alessandra Angélica de Padua. |
| Abstract: The aim of this study was to characterize the reproductive strategies of a population of Hyalella bonariensis from southern Brazil. Pairing success, reproductive period of males and females, fecundity, and body size at the onset of reproduction were evaluated. Animals were sampled four times (August 2012, October 2012, January 2013, and April 2013) with the 250 µm-mesh dip net during 20 minutes by only one person. In the field, precopulatory pairs and ovigerous females were individualized. In the laboratory, cephalothorax length (CL) were measured and eggs and juveniles were removed from the females' marsupium and counted. The mean CL of paired males and females was significantly higher than that of non-paired males and females. A sexual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fecundity; Body size; Hyalella bonariensis; Reproductive success; Pairing success. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000200207 |
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| Silva,André Luiz Gomes da; Pinheiro,Maria Célia Bezerra. |
| Eugenia uniflora,E. punicifolia,E. neonitida and E. rotundifolia are perennial species, usually shrubs, which occur in the restinga of the Grumari Natural Municipal Park, in western Rio de Janeiro, Brazil. They have Papaver-type pollen-flowers that are hermaphrodite, polystemonous and pollinated mainly by bees. An assessment of the breeding systems showed that only E. uniflora and E. punicifolia are self-compatible. The fruit/flower, seed/ovule and seed/fruit ratios were calculated for each species. Fruit and seed predators were identified and predation rates were estimated. Total reproductive success for each species in the restinga was extremely low. In order to have one viable seed free from herbivore attack at the end of the reproductive process, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding system; Eugenia; Myrtaceae; Reproductive success; Seed herbivory. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000200024 |
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| Fracasso,Hélio A.A.; Branco,Joaquim O.. |
| Sterna hirundinacea (Lesson, 1831) is a migratory seabird that breeds in the Pacific Coast (from Peru to Chile) and along the Atlantic coast of South America from Espírito Santo (Brazil) to Terra del Fuego (Argentina). This paper describes the reproductive success of South American Terns on Cardos Island, Florianopolis, Brazil in the breeding seasons of 2003, 2005 and 2006. The colony was formed in mid-May in 2003 and early April in other years, with the total number of nests ranging from 1,852 in 2006 to 2,486 in 2005. Hatching success was estimated at 76.39% in 2006, 62.73% in 2003 and 41.1% in 2005, the lowest value that could be attributed to predation by hawks Caracara plancus, lizards Tupinambis merianae and black vulture Coragyps atratus. The chicks... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Breeding; Reproductive success; South American Terns; Brazil. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200021 |
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| Registros recuperados: 20 | |
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