Consulta: subjectFacets:"Reproductive biology"
Registros recuperados: 40
Data/hora: 05/06/2024 03:49:07

REPRODUCTION AND DEVELOPMENT OF Dromiciops gliroides (MARSUPIALIA: MICROBIOTHERIIDAE) IN TEMPERATE RAINFORESTS OF SOUTHERN CHILE
Provedor de dados: 72
Autores: Muñoz-Pedreros,Andrés; Lang,Brian K; Bretos,Marta; Meserve,Peter L.
The reproductive biology of Dromiciops gliroides is described from five females collected during spring (October, December 1984) in southern continental Chile. Developmental morphology of intra-uterine embryos (October litters) was examined by microscopic analysis and compared with morphological attributes of 8 pouched young (December litters). Intra-uterine embryos demonstrate ontogenetic features characteristic of altricial neonates, which migrate from the urogenital opening to the marsupium in order to complete the later stages of development. D. gliroides apparently is a monoestrus, seasonal breeder producing one litter per year. Maximum recorded litter size is four, with birth occurring in early spring (October). The life cycle of D. gliroides is...
Tipo: Journal article
Palavras-chave: Dromiciops gliroides; Embryogenesis; Reproductive biology.
Ano: 2005
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382005000200002

Genetics, evolution and conservation of Bromeliaceae
Provedor de dados: 74
Autores: 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

Ovarian development and spawning of Macrobrachium amazonicum (Crustacea, Decapoda)
Provedor de dados: 76
Autores: Ventura,Emerson; Winick-Silva,Allysson; Shinozaki-Mendes,Renata A.
ABSTRACT Macrobrachium amazonicum (Heller, 1862) is the most important species for aquaculture native to South America. This study evaluates the phenotypic plasticity of females of Macrobrachium amazonicum with respect to the gonadal development, and determines the spawning type. Our study consisted of macro and microscopic analysis of the reproductive tract. Ovaries exhibited the following reproductive cells in developmental sequence: oogonia (OO) - mean diameter and standard deviation of 25.4 ± 6.5 μm; previtellogenic oocyte (PVO) - 61.7 ± 10.7 μm, vitellogenic oocyte (VO) - 113.9 ± 24.5 μm; and mature oocyte (MO) - 308.7 ± 56.3 μm. Ovaries increased in volume due to vitellogenesis and changing of basophilic to acidophilic composition. Follicular cells,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive biology; Maturation; Clutches of oocytes; Histology; Amazon River prawn.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100226

Relative growth of freshwater prawn Macrobrachium brasiliense (Decapoda, Palaemonidae) and its implications for reproduction
Provedor de dados: 76
Autores: Nogueira,Caio dos Santos; Oliveira,Marcela Silvano de; Jacobucci,Giuliano Buzá; Almeida,Ariádine Cristine de.
ABSTRACT The main objective of this study was to estimate the morphological sexual maturity of Macrobrachium brasiliense (Heller, 1862) and to analyze the relative growth of the species. During one year of sampling, from July 2012 to June 2013, 199 specimens were collected in a stream located in a Cerrado biome, in the Triângulo Mineiro region, state of Minas Gerais. Once identified and sexed, the length of the carapace, the length of the segments of the chelipeds (ischium, merus, carpus, propodus and dactyl) and width of the pleura were measured (mm). The maximum and mean sizes of the carapace length measured 20.5 mm (Mean: 9.6 ± 4.2 mm) and 20.1 mm (Mean: 7.7 ± 3.4 mm) for males and females, respectively. The propodus length for males, and the pleura...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Allometry; Morphological sexual maturity; Reproductive biology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212019000100205

Use of roof as roost of Eumops perotis (Molossidae: Chiroptera) in southeast Brazil
Provedor de dados: 76
Autores: Breviglieri,Crasso Paulo B.; Esbérard,Carlos Eduardo L.
ABSTRACT The bat Eumops perotis (Schinz, 1821) is broadly distributed in the Americas. Studies on its biology are still scarce and the few studies available are relatively outdated. In the present study, we describe the biology of Eumops perotis in an artificial roost in the municipality of Pindorama, State of São Paulo, southeastern Brazil, which was monitored for 12 months. We captured 50 individuals; 43 adults (34 males and 9 females) and seven juveniles (three males and four females). Nineteen adults were recaptured throughout the year (15 males and four females) during samplings. Males were ~33% heavier than females. Males remained in the roost throughout the year, while females were absent in June, July, and August. The presence of males with scrotal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive biology; Biometrics; Behavior; Diet.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100233

Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
Provedor de dados: 76
Autores: Bonach,Kelly; Malvasio,Adriana; Matushima,Eliana R.; Verdade,Luciano M.
This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: TSD; Thermosensitive period; Sex determination; Reproductive biology; Turtles.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001

Observações sobre a biologia reprodutiva de três espécies de jacarés na Amazônia Central.
Provedor de dados: 14
Autores: CAMPOS, Z. M. da S.
O estudo de reprodução dos jacarés amazônicos foi feito no lago Cururu, situado no rio Solimões, AM, em 2001 e 2002. Nos dois anos, entre os meses de novembro a janeiro, foram encontrados 60 (sessenta) ninhos de jacaré-tinga, Caiman crocodilus crocodilus. O tamanho das fêmeas reprodutivas de jacaré-tinga variou de 70,0 a 87,0 cm de comprimento rostro-anal (CRA). O número médio de ovos foi de 25 (DP= 5,6), variando de 14 a 38. O comprimento médio dos ovos foi de 57,8 cm (DP= 3,4) e a largura media foi de 35,9 (DP=3,1). No segundo ano, foram encontrados dois ninhos de jacaré-paguá, Paleosuchus palpebrosus, um deles foi predado e o outro tinha 15 ovos e a fêmea mediu 69 cm de CRA, e dois ninhos de jacaré-açu, Melanosuchus niger. O potencial reprodutivo deve...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Biologia reprodutiva; Amazônia Central; Caiman crocodilus crodilus; Reproductive biology; Central Amazon.; Jacaré; Reprodução.; Reproduction.
Ano: 2003
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/809829

Notes on collections of fruit bats from Sulawesi and some off-lying islands (Mammalia, Megachiroptera)
Provedor de dados: 16
Autores: Bergmans, W.; Rozendaal, F.G.
Notes are given on the taxonomy, reproductive biology, ecology and ectoparasites of 20 species of - mostly recently collected - Megachiroptera from Sulawesi, Indonesia. The occurrence of one species on Sulawesi is considered doubtful and a further three species are deleted from the Sulawesian faunal list. A key based on externally visible characters and a gazetteer of the collecting localities of Sulawesian bats are appended.
Tipo: Article / Letter to the editor
Palavras-chave: Megachiroptera; Sulawesi; Sangihe Islands; Taxonomy; Zoogeography; Biometry; Ecology; Reproductive biology; Ectoparasites.; 42.84.
Ano: 1988
URL: http://www.repository.naturalis.nl/record/317853

Fossil evidence of the zygomycetous fungi
Provedor de dados: 16
Autores: 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

Effect of Host Plant on the Fecundity of Spittlebug Deois flavopicta Stal (Homoptera: Cercopidae): Implications on Population Dynamics
Provedor de dados: 82
Autores: SUJJI,E.R.; PIRES,C.S.S.; FONTES,E.M.G.; GARCIA,M.A.
The spittlebug Deois flavopicta Stal (Hom.: Cercopidae) occurs naturally on native grasses in Central Brazil in low population densities. After the introduction of African grasses, mainly of the genus Brachiaria, for cattle raising, D. flavopicta began to produce population outbreaks and became a pest. Two studies were conducted, aiming to estimate the effects of a native and an exotic host plant on the fecundity of this insect. Females of D. flavopicta maintained during the adult stage on Brachiaria ruziziensis produced more eggs and lived longer than those maintained on Axonopus marginatus (a native grass widely distributed in Brazil), independently of the host plant on which the nymphs were reared. Due to the severe damage produced by adult D....
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Insecta; Population dynamics; Reproductive biology; Insect-plant interaction; Population outbreaks.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2001000400006

Biology of Bonagota cranaodes (Meyrick) (Lepidoptera: Tortricidae) on seven natural foods
Provedor de dados: 82
Autores: 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

Local ecological knowledge of fishers about the life cycle and temporal patterns in the migration of mullet (Mugil liza) in Southern Brazil
Provedor de dados: 83
Autores: Herbst,Dannieli Firme; Hanazaki,Natalia.
This research investigates local ecological knowledge of fishers in communities along a latitudinal gradient in the coast of the Santa Catarina State, regarding the life cycle of mullets Mugil liza (migration, feeding, and reproductive behavior). Our sampling encompassed eight Santa Catarina coastal cities (nine artisanal fishing sites) and engaged 45 key informants (28- 86 years of age) through semi-structured interviews from August/2011 to March/2012. This fish species feeds and grows in lagoon and estuarine systems, migrating to the sea for reproduction, and spawning. Fishers acknowledged the Patos Lagoon and the Plata River as the main source of mullet schools. Migration occurs from South to North and the routes vary according to climatic and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Artisanal fisheries; Ethnoecology; Feeding; Mugilidae; Reproductive biology.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400879

Aspects of fishing and reproduction of the black grouper Mycteroperca bonaci (Poey, 1860) (Serranidae: Epinephelinae) in the Northeastern Brazil
Provedor de dados: 83
Autores: Teixeira,Simone Ferreira; Ferreira,Beatrice Padovani; Padovan,Isaíras Pereira.
The reproductive biology of the black grouper Mycteroperca bonaci, caught by artisanal fishermen using hook and line or compressor - assisted spear fishing, from the Northeastern shelf and oceanic banks of Brazil, was studied between August 1996 and April 1998. The sexual pattern, gonadal development, the spawning mode and seasonality were investigated. The gonadal stages indicated that this species is a protogynous hermaphrodite and that transition from female to male occurs through simultaneous re-absorption of ovarian tissue and proliferation of testicular tissue in the gonads. The specie is a multiple spawner and frequency analysis of gonadal stages and gonadosomatic index suggest that the spawning season occurs between April and September....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Serranid; Reproductive biology; Protogynous hermaphrodite; "correção"; Feeding aggregation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000100004

Patterns of energy allocation to reproduction in three Amazonian fish species
Provedor de dados: 83
Autores: Santos,Rodrigo N. dos; Amadio,Sidinéia; Ferreira,Efrem J. G.
The study considered the influence of the hydrological cycle and gonadal development on the accumulation and use of energy in three fish species from an Amazonian flooded area. Fishes were sampled over a 24 hour period at monthly intervals between July 2004 and June 2005 using gillnets of different mesh sizes. Body cavity fat and gonadosomatic indices were determined, as well as energy content of gonads and muscles. Amongst the studied species, different means of energy allocation for reproduction were found: Acestrorhynchus falcirostris allocate energy from body cavity fat to its gonads; Pygocentrus nattereri uses mainly energy accumulated in the muscles for the process of gonadal maturation; and Hoplosternum littorale uses energy accumulated in their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon floodplain; Energy contents; Hydrological cycle; Reproductive biology.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000100018

Reproductive studies of Anchoa marinii Hildebrand, 1943 (Actinopterygii: Engraulidae) in the nearby-coastal area of Mar Chiquita coastal lagoon, Buenos Aires, Argentina
Provedor de dados: 83
Autores: López,Sofía; Mabragaña,Ezequiel; Astarloa,Juan Martín Díaz de; González-Castro,Mariano.
The aim of the present study provides the first results on the reproductive biology of the anchovy, Anchoa marinii, in a nearby-coastal area of Mar Chiquita coastal lagoon, 37º32'00"S 57º19'00"W, Argentina. To perform this, we employed mainly female gonads, at both microscopic and macroscopic levels. The oocyte diameter distribution and the microscopy analysis of oocytes, showed different batches of growing oocytes, suggesting that the anchovy is a multiple spawner, with constant oocytes recruitment all over the reproductive season. The batch fecundity ranged between 749 and 3,207 oocytes for females, and the relative fecundity ranged from 127 to 422 yolked oocytes per female gram (ovary free). The fecundity estimation has been made with yolked oocytes. No...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clupeiformes; Fecundity; Multiple spawner; Reproductive biology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000100221

Parturition time for the Blacktip shark, Carcharhinus limbatus (Carcharhiniformes: Carcharhinidae), in Southwestern Atlantic
Provedor de dados: 83
Autores: Santander-Neto,Jones; Yokota,Leandro; Meneses,Thiago Silveira de.
Abstract The determination of the period of parturition and identification of nursery areas are fundamental for the management and conservation of a fishing resource. Through combination of monthly abundance, length measurements, and development time of embryos we inferred about parturition time of the Blacktip sharks, Carcharhinus limbatus, from Southwestern Atlantic. Specimens of C. limbatus were caught from 2002 and 2008 by artisanal fleets from three different locations along the Brazilian coast using gillnets (mesh width ranging between 30 and 120 mm between opposite knots and operating from 9 to 120 m in depth), handlines (19 to 140 m depth) and longlines (6 to 90 m depth). Through a comparative analysis of fisheries landing data collected, we have...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birth time; Chondrichthyes; Fishery; Nursery; Reproductive biology.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000300212

Fecundity, embryo size and embryo loss in the estuarine shrimp Salmoneus carvachoi Anker, 2007 (Crustacea: Alpheidae) from a tidal mudflat in northeastern Brazil
Provedor de dados: 84
Autores: 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

Reproductive phenology of Melocactus (Cactaceae) species from Chapada Diamantina, Bahia, Brazil
Provedor de dados: 88
Autores: Fonseca,Rosineide Braz Santos; Funch,Ligia Silveira; Borba,Eduardo Leite.
This paper discusses the phenological strategies of Melocactus glaucescens Buining &amp;amp; Brederoo, M. paucispinus G. Heimen &amp;amp; R. Paul, M. ernestii Vaupel and M. ×albicephalus Buining &amp;amp; Brederoo, species from Chapada Diamantina, northeastern Brazil. Melocactus glaucescens, M. ernestii and M. ×albicephalus occur sympatrically in an area of "caatinga"/"cerrado" vegetation, and M. paucispinus in an area of "cerrado"/"campo rupestre". The superposition of flowering in these sympatric taxa was compared and analyzed. The phenology of M. paucispinus was correlated with both abiotic and biotic factors. Flowering of M. glaucescens and M. ×albicephalus were observed to be continuous (though with moderate peaks of activity), while fruiting was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cactaceae; Hybridization; Melocactus; Phenology; Reproductive biology.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000200006

Biologia reprodutiva de Calibrachoa elegans (Miers) Stehmann &amp;amp; Semir (Solanaceae)
Provedor de dados: 88
Autores: STEHMANN,JOÃO RENATO; SEMIR,JOÃO.
Calibrachoa elegans é uma espécie anual, endêmica da região da canga do quadrilátero ferrífero de Minas Gerais, Brasil. O estudo da sua biologia reprodutiva envolveu experimentos de cruzamentos, teste do sistema de auto-incompatibilidade e observação do processo de polinização. Os experimentos realizados através de polinizações manuais indicam que a população estudada é preferencialmente alógama. A interrupção do crescimento do tubo polínico no estilete das flores autopolinizadas, verificada através da microscopia de fluorescência, confirmou a ocorrência de reação de auto-incompatibilidade. A polinização é realizada apenas pelas fêmeas de Hexantheda missionica (Colletinae, Apoideae), uma abelha com alta fidelidade de visita às flores de C. elegans. Os...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive biology; Conservation; Biogeography; Hexantheda missionica; Calibrachoa elegans.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100005

Mixed reproduction systems in Opuntia monacantha (Cactaceae) in Southern Brazil
Provedor de dados: 88
Autores: Lenzi,Maurício; Orth,Afonso Inácio.
The Cactaceae have morphological and physiological adaptations associated with their life histories that are reflected in different modes of reproduction and multiplication. The reproductive phenology, preferential reproductive mode, and the sexual and asexual multiplication of Opuntia monacantha were investigated between 2003 and 2006 in two restinga (sandy coastal) environment in Southern Brazil to determine the adaptive values of its reproduction modes. Flowering was annual and occurred continuous for approximately 100 days between the months of September and January, with a few flowers opening per day per individual (but many in the whole population). Facultative xenogamy was identified as the preferential sexual system, with the highest levels of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cacti; Clonal multiplication; Reproductive biology; Restinga vegetation.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042012000100006

Reproductive biology of Pseudolaelia corcovadensis Porto &amp;amp; Brade (Orchidaceae): melittophyly and self-compatibility in a basal Laeliinae
Provedor de dados: 88
Autores: Borba,Eduardo L.; Braga,Pedro Ivo S.
The floral biology, mating systems and phenology of Pseudolaelia corcovadensis (Orchidaceae), in the "Estação de Pesquisa e Desenvolvimento Ambiental de Peti", São Gonçalo do Rio Abaixo, Minas Gerais state was studied. This species flowers from April to September, with a higher availability of flowers in June and July. The flowers are dark-pink, strongly zygomorphic, and have osmophores and nectar-guides absorbing ultraviolet light. However, the flowers of P. corcovadensis do not present nectar and are pollinated by Bombus (Fervidobombus) atratus Franklin, 1913 (Hymenoptera: Apidae) by deceit. Apparently, the flowers do not form a model-mimic pair with other species in the community, but mimic a generalized melittophilous food-flower. As a consequence,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melittophily; Orchidaceae; Pollination; Pseudolaelia; Reproductive biology.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042003000400013

Behavioral ecology of Heteragrion consors Hagen (Odonata, Megapodagrionidae): a shade-seek Atlantic forest damselfly
Provedor de dados: 92
Autores: Loiola,Geovanni Ribeiro; De Marco,Paulo.
Behavioral ecology of Heteragrion consors Hagen (Odonata: Megapodagrionidae): a shade-seek Atlantic forest damselfly. The intensity of the inter and intra-sexual selection can affect male behavioral traits as territorial fidelity and aggressiveness allowing the existence of different strategies. However, its differential success could be affected by environmental - as the diel variation in temperature - and physiological constrains - as the variation in thermoregulatory abilities. In this context, we present a behavioral analysis of Heteragrion consors (Zygoptera, Megapodagrionidae) trying to characterize its mating system, diel activity pattern, temporal budget, territoriality and reproductive biology. These data were obtained based on field observations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mating systems; Reproductive biology; Temporal budget; Thermoregulation; Territoriality.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000300010

Population dynamics and reproductive strategy of Scolelepis goodbodyi (Polychaeta: Spionidae) in a subtropical atlantic beach
Provedor de dados: 103
Autores: Leão,Luciana S. Dourado; Soares-Gomes,Abílio; Costa,Tarso; Santos,Cinthya S. Gomes.
The population dynamics and reproductive strategy of the polychaete Scolelepis goodbodyi (Jones, 1962), were investigated between June 2009 and May 2010 at Manguinhos beach, southeastern, Brazil. A total of 9,242 individuals were collected. The density did not differ significantly from one month to another. The estimated values of the growth, recruitment, and mortality rates were studied using the width of the third setiger and the growth curves for the populations were adjusted by the Bhattacharya method (L'= 1.23, K = 1.2, mortality = 0.73). Two annual cohorts were identified in the period. Significant differences between males and females were observed in the population (x² = 71.6, p &lt; 0.01) and between sexually defined and sexually indeterminate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Annelida; Population ecology; Reproductive biology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702012000300002

Reproductive plasticity of Hypostomus affinis (Siluriformes: Loricariidae) as a mechanism to adapt to a reservoir with poor habitat complexity
Provedor de dados: 103
Autores: Duarte,Silvana; Araújo,Francisco Gerson; Bazzoli,Nilo.
In this work we describe the gonad morphology and spawning season of Hypostomus affinis (Steindachner, 1877) in a tropical reservoir based on 55 males and 125 females. Our aim was to assess eventual adaptations in reproductive tactics developed by this riverine species inhabiting an oligotrophic reservoir with low habitat complexity, few rocks and few other preferred consolidated substrata. We described the stages of cells of reproductive lineage, gonadal development and some reproductive traits which were compared with information in the available literature. Cells from the spermatogenic lineage were spermatogonia, spermatocytes, spermatids and spermatozoa, and cells from the oocytarian lineage were primary oocytes, previtelogenic oocytes, cortical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazil; Fish reproduction; Reproductive biology; Reservoirs; Tactics.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702011000500005

Intersexuality in the porcellanid crab Pisidia longicornis (Crustacea: Decapoda: Anomura: Porcellanidae)
Provedor de dados: 103
Autores: Ferreira,Luciane Augusto de Azevedo.
Intersex specimens of Pisidia longicornis (Linnaeus, 1767) are recorded for the first time and their secondary sexual characters are analyzed. Of 145 specimens of P. longicornis examined in this study, six were identified as intersex individuals. Of these, three presented male secondary sexual characters, well-developed male gonopores and rudimentary female gonopores, whereas the other three had female secondary sexual characters, with female gonopores being more pronounced than the male ones. The present study provides the first record of intersex porcelain crabs.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Malacostraca; Porcelain crabs; Sexual characters; Reproductive biology.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000200176

Population structure and reproductive biology of Metamysidopsis neritica (Crustacea: Mysidacea) in a sand beach in south Brazil
Provedor de dados: 104
Autores: Calil,Patrícia; Borzone,Carlos A.
Mysidacea are common sublittoral crustaceans that inhabit all coasts in the world. In this study, the population characteristics and the reproductive biology of Metamysidopsis neritica Bond-Buckup &amp;amp; Tavares, 1992 were studied in the surf zone of a south Brazilian beach (Atami). Mysids were sampled at monthly intervals from August, 1999 to July, 2000 (total of 29,490 individuals). Individuals were classified into six population categories. The highest abundance occurred in May (8,665) and August (6,415), and lowest in September (336) and December (368). Three main generations were identified, namely the summer, fall and winter generations. The winter generation was the longest (four to five months). The fall generation lasted four months, and the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Opossum shrimps; Reproductive biology; Surf zone; Sandy beach.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000300004

Reprodução do peixe-rei, Atherinella brasiliensis (Quoy &amp;amp; Gaimard) (Atheriniformes, Atherinidae), em uma planície de maré adjacente à gamboa do Baguaçu, Baía de Paranaguá, Paraná, Brasil
Provedor de dados: 104
Autores: Favaro,Luís Fernando; Lopes,Sabine de C. G.; Spach,Henry Louis.
The present study investigated the reproductive biology of silverside, Atherinella brasiliensis (Quoy &amp;amp; Gaimard, 1825) in a tidal flat of Paranaguá Bay, littoral of Paraná State, Brazil. Fish were captured monthly from November 1998 to October 1999 by the mean of a seine-net. For each individual, total body length, total weight, sex, and gonadal weight were recorded. Gonadal development stages were also defined based on the histological examination of the ovaries and on the visual aspects of the testes. It was defined that the reproductive period of A. brasiliensis extends from June to December, based on he analyses of individual gonadosomatic index (GSI) values distribution in relation to the sampling periods, on the monthly variation of the GSI...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Histology; Reproductive biology; Tidal flat.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000300022

Entomofauna visitante de Belamcanda chinensis (L.) DC (Iridaceae) durante o período de floração
Provedor de dados: 104
Autores: 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

VASCULAR EPIPHYTES: THE UGLY DUCKLING OF PHENOLOGICAL STUDIES
Provedor de dados: 37
Autores: RAMÍREZ-MARTÍNEZ,Adriana; MONDRAGÓN,Demetria; RIVERA-GARCÍA,Raúl.
ABSTRACT The phenology of vascular epiphytes, which account for about 10 % of the world's flowering plants and perform important ecological functions, has been just partially explored. Since phenology is a key tool for the management and conservation of species, the objective of this review was to synthesize the information published so far about the phenology of vascular epiphytes, detect gaps of knowledge, and suggest future lines of investigation to understand the underlying mechanisms. We conducted an online search for articles in Google Scholar and in the ISI Web of Science database from 1800 to 2020, with different combinations of keywords. 107 studies addressing the phenology of different holoepiphyte species were found; 88 % of the studies were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Environmental factors; Dispersion; Pollination; Reproductive biology; Seasonal development; Vegetative biology.
Ano: 2021
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2021000200247

Histology of folicular development of hybrids between Triatoma infestans Klug, 1864 and Triatoma platensis Neiva, 1913 (Hemiptera: Heteroptera)
Provedor de dados: 37
Autores: 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

The reproductive biology of the early-divergent genus Anaxagorea (Annonaceae), and its significance for the evolutionary development of the family
Provedor de dados: 39
Autores: Gottsberger,Gerhard.
ABSTRACT Data of six studied Neotropical Anaxagorea species are analyzed and discussed with respect to the population structure, flowering phenology, flower morphology, anthesis, scent emission, thermogenesis, floral visitors, breeding system, fruit-set and seed dispersal. The probably reason for the patchy distribution of small populations of Anaxagorea species within lowland tropical forests is given. A novel explanation of the functional significance of ruminate endosperm is presented. Flowering of the species follows either the annual or the continuous flowering pattern. All studied species have diurnal, two-day lasting, protogynous anthesis; several species have thermogenic flowers. Self-compatibility appears to be the prevailing reproductive system...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anaxagorea; Pollination; Reproductive biology; Radiation and diversification of Annonaceae; Reproductive systems; Ruminate endosperm; Seed dispersal.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200313

Towards a unified terminology for angiosperm reproductive systems
Provedor de dados: 39
Autores: Cardoso,João Custódio Fernandes; Viana,Matheus Lacerda; Matias,Raphael; Furtado,Marco Túlio; Caetano,Ana Paula de Souza; Consolaro,Hélder; Brito,Vinícius Lourenço Garcia de.
ABSTRACT Angiosperms display an enormous diversity of forms, functions and strategies when it comes to reproduction. This multiplicity has been translated into several terminological concepts and contexts, which have facilitated further research. On the other hand, the use of terms that address the reproduction of flowering plants has been shown to be inconsistent in the literature, complicating communication among specialists. Key terms, such as “reproductive system”, “mating system” and “sexual system”, among others, have been frequently cited as synonyms, and even used in different circumstances. This review proposes to establish a consistent nomenclatural classification in the field of angiosperms reproductive biology in order to facilitate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apomictic systems; Asexual reproduction; Floral systems; Flowering plants; Incompatibility systems; Mating systems; Reproductive biology; Sexual reproduction; Sexual systems.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000300329

Atypical distyly in Psychotria goyazensis Mull. Arg. (Rubiaceae), an intramorph self-compatible species
Provedor de dados: 39
Autores: 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

Occurrence of the Indo-Pacific freshwater prawn Macrobrachium equidens Dana 1852 (Decapoda, Palaemonidae) on the coast of Brazilian Amazonia, with notes on its reproductive biology
Provedor de dados: 42
Autores: Maciel,Cristiana R; Quadros,Manoel L; Abrunhosa,Fernando; Bastos,Sandra; Schneider,Horacio; Sampaio,Iracilda.
The freshwater prawn Macrobrachium equidens, which is native species of the Indo-Pacific Region, was recorded for the first time on the Amazon coast of Brazil. This species was found to inhabit the same environment as two native Macrobrachium species, M. amazonicum and M. acanthurus, and is morphologically very similar to the latter. The identification of the species was confirmed by the genetic analysis of sequences of the mitochondrial Cytochrome Oxidase (COI) gene. A detailed description of the morphological features and reproductive biology of M. equidens in this new environment is presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crustacean; Caeté Estuary; Invasive species; Mitochondrial COI gene; Reproductive biology.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000200013

Reproductive activity and vocalizations of Leptodactylus labyrinthicus (Anura: Leptodactylidae) in southeastern Brazil
Provedor de dados: 49
Autores: Zina,Juliana; Haddad,Célio F. B.
Vocalizations and reproductive activity of two Leptodactylus labyrinthicus populations were studied from Jun/2001 to Feb/2003 in the State of São Paulo, Brazil. Observations began at dusk and ended around 2300 h. Occasionally individuals were monitored throughout the night. Data on reproductive period, calling sites, adult snout-vent length (SVL), oviposition sites, and oviposition period was collected. Leptodactylus labyrinthicus had an extended breeding period associated mainly with rainfall. Males called from the edge of temporary or permanent ponds, began vocalization activity at dusk, and finished around 2300 or 2400h. During the peak of the vocalization period (Dec- Jan), calling activity could extend up to 0400 or 0500h. Three types of vocalizations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anura; Leptodactylus labyrinthicus; Reproductive biology; Vocalizations; Frog-hunting.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000300008

Reproductive biology of weakly electric fish Eigenmannia trilineata López and Castello, 1966 (Teleostei, Sternopygidae)
Provedor de dados: 52
Autores: Giora,Júlia; Fialho,Clarice Bernhardt.
This study described the reproductive biology of a population of the weakly electric fish Eigenmannia trilineata from southern Brazil, providing the information on the estimation of reproductive period, fecundity, spawning type, first maturation size, and analysis of gonadal morphology and histology of the species, relating these data to alimentary and abiotic characters. The species showed a relatively long reproductive period, a relative fecundity of 0.27 oocytes per mg of total weight and a parcelled spawning type. First maturation size estimated for the females was 80.5 mm and for the males 63.5 mm of total length. Sex ratio did not differ from 1:1 under a X²test (α= 0.01) during all the sampled months. Sexual dimorphism was related to total length,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Reproductive biology; Gymnotiformes; Eigenmannia; Abiotic factors; Southern Brazil.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300014

Life Cycle Observations on Amphilocus neapolitanus (Della Valle, 1853) (Crustacea, Amphipoda) Associated with Sargassum cymosum C. Agardh, 1820 in Ubatuba, (SP), Brazil
Provedor de dados: 52
Autores: Leite,Fosca Pedini Pereira.
Day and night densities, reproductive biology and life cycle of Amphilocus neapolitanus (Della Valle, 1853), associated with Sargassum cymosum C. Agardh, 1820, were studied during 13 months. The density of juveniles, males and females was higher in night samples than in day samples. Sex ratio was strongly favorable toward the females. Ovigerous females were present in similar densities in both the periods while the non-ovigerous females were predominant at night. The egg number was not correlated with the size of the females. Breeding occurred throughout the year.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Population structure; Reproductive biology; Life cycle; Amphipoda; Sargassum.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000300014

Reproductive biology of a tetragonopterinae (osteichthyes, characidae) of the Ubatiba fluvial system, Maricá - RJ
Provedor de dados: 52
Autores: Mazzoni,Rosana; Petito,Jaqueline.
Aspects of the reproductive biology of one Tetragonopterinae was assessed in the Ubatiba river - Maricá / RJ. Length structure and mean size suggested sexual dimorphism, females reaching larger sizes than males. The onset of sexual maturity occured at 2.8cm for both the sexes. Fecundity, determined on ripe ovaries, showed positive correlation to females size and weight and varied from 595 to 5520 for 3.9cm and 6.2cm lengths respectively. The spawning type, defined as total, was determined by the oocyte diameter frequency from ovaries in different development stages. The frequency distribution of ovarian/testis maturation stages, associated with the temporal variation of the gonadosomatic index, suggested that the reproduction period was prolonged along the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tetragonopterinae; Coastal stream; Reproductive biology.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400011

Effect of ivermectin on the life cycle and larval fat body of Culex quinquefasciatus
Provedor de dados: 52
Autores: Alves,Stenio Nunes; Serrão,José Eduardo; Mocelin,Giovani; Melo,Alan Lane de.
The present work investigated the behavior, survival rate and lethal effect of 1.5 ppb ivermectin on Culex quinquefasciatus larvae, based on morphological and biological parameters, and possible alterations of their fat body. Changes in the number of eggs/egg mass and length of the larval stage were investigated. For this experiment, 600 larvae of 3rd and 4th instars of the mosquito were tested. The laid eggs were separated and the hatched larvae were counted. Some larvae submitted to 1.5 ppb ivermectin solution were used to prepare samples for histological study. Results obtained showed that ivermectin in a concentration of 1.5 ppb caused paralysis to the larvae with a mortality rate of 73.38%, mobilization of substances stored in the fat body and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diptera; Fat body; Insecticide; Mosquito; Reproductive biology.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000300014

Reproductive behavior and seasonal occurrence of Psecas viridipurpureus (Salticidae, Araneae)
Provedor de dados: 57
Autores: ROSSA-FERES,D. de C.; ROMERO,G. Q.; GONÇALVES-DE- FREITAS,E.; FERES,R. J. F.
The reproductive behavior and the seasonal occurrence of Psecas viridipurpureus were studied at the Estação Ecológica do Noroeste Paulista, a small conservation area in the northwest region of São Paulo State, Brazil (49°22'50''W and 20°48'36''S). P. viridipurpureus occurred on "gravatá", a bromeliaceous plant (Bromelia balansae, Bromeliaceae) which does not accumulate rain water. During the courtship display the couple occupied the median region of the "gravatá" leaves, with the male always located in a higher position than the female. The males of P. viridipurpureus showed a complex courtship behavior, which included five motor patterns. The courtship and mating behavior occurred preponderantly during the rainy season and the juvenile recruitment between...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Seasonal occurrence; Courtship behavior; Reproductive biology; Salticidae; Psecas viridipurpureus.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000200005