Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: 

RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 45
Primeira ... 123 ... Última
Imagem não selecionada

Imprime registro no formato completo
Survival and growth of tree seedlings as a function of seed size in a gallery forest under restoration Acta Botanica
Macera,Leonardo Gallo; Pereira,Silvia Rahe; Souza,Andréa Lúcia Teixeira de.
ABSTRACT Seed size is commonly related to higher rates of emergence and survival, and biomass of seedlings when introduced by direct seeding. However, few studies have evaluated whether this relationship persists when species are reintroduced as seedlings or if this effect persists after seed reserves decline. This study evaluated the effect of seed size (mass) on the probability of survival and growth of seedlings of nine native tree species introduced into a pasture area, which was originally a gallery forest in the state of São Paulo in Southeastern Brazil. The experiment occurred over the course of 24 months, in which was divided into three separate time intervals: 14 to 61 days, 61 days to 12 months, and 12 to 24 months. Seedling survival in the field...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Functional trait; Life history; Nursery-raised seedling planting; Pioneering species; Species reintroduction.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400539
Imagem não selecionada

Imprime registro no formato completo
Reproductive phenological pattern of Calotropis procera (Apocynaceae), an invasive species in Brazil: annual in native areas; continuous in invaded areas of caatinga Acta Botanica
Sobrinho,Mellissa Sousa; Tabatinga,George Machado; Machado,Isabel Cristina; Lopes,Ariadna Valentina.
In this study, we evaluated the phenological patterns (vegetative and reproductive) of Calotropis procera (Apocynaceae-Asclepiadoideae) in Brazil, comparing its phenology in an area where it is invasive with that observed in areas to which it is native. Phenological observations were carried out over a 24-month period at sites in and around areas of caatinga (shrublands). We estimated the relative frequency of each phenophase, and we documented a dramatic difference between phenophases in terms of the pattern of reproductive phenology . The pattern of continuous flowering and fruiting observed in the invaded area strongly diverges from the 2- to 6-month flowering and fruiting period of the annual pattern. The continuous pattern of reproduction seems to...
Tipo: Info:eu-repo/semantics/other Palavras-chave: Asclepiadoideae; Flowering; Fruiting; Life history; Phenological plasticity.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000200018
Imagem não selecionada

Imprime registro no formato completo
Reproduction of a whiptail lizard (Ameivula ocellifera, Teiidae) from a coastal area in northeastern Brazil Anais da ABC (AABC)
ZANCHI-SILVA,DJAN; BORGES-NOJOSA,DIVA M.; GALDINO,CONRADO A.B..
The reproductive ecology of Ameivula ocellifera was studied from September 2009 to August 2010 in a coastal area of the state of Ceará, Brazil. Females reproduced continuously throughout the year, with a peak at the end of the rainy season. Even though there was a predominance of pre-reproductive individuals in the sample, gonadal activity of males peaked synchronously to female reproduction. Mean clutch size was 1.98 ± 0.56 and positively associated with female body size, while mean egg volume was 510.54 ± 84.29 mm3 and unrelated to female body size. We did not find any association between clutch size and average egg volume.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ameivula; Cnemidophorus; Life history; Reproductive cycle.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301263
Imagem não selecionada

Imprime registro no formato completo
Reproduction and growth in a Neotropical arboreal mouse: Oecomys rutilus (Sigmodontinae: Cricetidae) in French Guiana Biota Neotropica
Catzeflis,François.
Abstract: Postnatal growth and development of the small Neotropical mouse Oecomys rutilus (Sigmodontinae: Cricetidae) were investigated from birth to day 143, in the laboratory. Morphometric measurements at age of 3 days, of both sexes combined, revealed body weight to be 3.4 ± 0.3 g, mean tail length as 27.4 ± 1.1 mm, and mean hind foot length as 9.3 ± 0.7 mm. Body weight was found to increase steadily until at least 69 days, whereas the instantaneous growth rates of other measurements declined earlier: the daily growth of hind foot length declined to a minimum at age of 24 days, and the growth of tail and of ear declined by the age of 33 days. Average litter size for 12 captive births was 2.5, ranging from 2 to 3. The preserved eye crystalline lens was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allometry; Gompertz model; Rodents; Eye-lens weight; Life history.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000200207
Imagem não selecionada

Imprime registro no formato completo
Bioecología del barrenador grande de la semilla de aguacate Heilipus lauri Boheman (Coleoptera: Curculionidae) en la región central de México Colegio de Postgraduados
Castañeda Vildózola, Alvaro.
A pesar de que Heilipus lauri Boheman (Coleoptera: Curculionidae) es una plaga que puede repercutir negativamente en la comercialización exterior del aguacate cultivado en México, se carece de información científica básica y aplicada sobre este insecto. La existente es muy superficial e imprecisa que no puede sustentar aspectos relacionados con su morfología, biología y distribución en nuestro país. Considerando lo anterior se propone generar información básica que pueda ser utilizada como referencia dentro de programas de manejo y/o erradicación dentro de áreas que reportan la presencia de este insecto. La presente investigación comprendió la descripción morfológica, aspectos biológicos como instares larvarios, fecundidad, fertilidad y...
Tipo: Tesis Palavras-chave: Persea americana; Picudos; Ciclo de vida; Fecundidad; Distribución; Doctorado; Entomología y Acarología; Persea americana; Weevils; Life history; Fecundity; Distribution.
Ano: 2008 URL: http://hdl.handle.net/10521/1406
Imagem não selecionada

Imprime registro no formato completo
Scaling of Natal Dispersal Distances in Terrestrial Birds and Mammals Ecology and Society
Sutherland, Glenn D; University of British Columbia; gsland@interchg.ubc.ca; Harestad, Alton S; Simon Fraser University; harestad@sfu.ca; Price, Karen; Simon Fraser University; kprice@futurenet.ca; Lertzman, Ken; Simon Fraser University; lertzman@sfu.ca.
Natal dispersal is a process that is critical in the spatial dynamics of populations, including population spread, recolonization, and gene flow. It is a central focus of conservation issues for many vertebrate species. Using data for 77 bird and 68 mammal species, we tested whether median and maximum natal dispersal distances were correlated with body mass, diet type, social system, taxonomic family, and migratory status. Body mass and diet type were found to predict both median and maximum natal dispersal distances in mammals: large species dispersed farther than small ones, and carnivorous species dispersed farther than herbivores and omnivores. Similar relationships occurred for carnivorous bird species, but not for herbivorous or omnivorous ones....
Tipo: Peer-Reviewed Reports Palavras-chave: Allometric scaling; Birds; Body mass; Comparative analysis; Connectedness; Diet type; Habitat alterations; Life history; Mammals; Movements; Natal dispersal distances; Probability density function.
Ano: 2000
Imagem não selecionada

Imprime registro no formato completo
Clutch size in the small-sized lizard Eurolophosaurus nanuzae (Tropiduridae): does it vary along the geographic distribution of the species? Iheringia, Sér. Zool.
Galdino,Conrado A. B; Sluys,Monique Van.
We studied life history traits of females of the lizard Eurolophosaurus nanuzae (Rodrigues, 1981), an endemic species of rock outcrop habitats in southeastern Brazil. During October 2002 and 2003 we sampled three populations in sites that encompass the meridional portion of the geographic range of the species. Clutch size varied from one to three eggs, with most females carrying two eggs. Clutch size did not vary among populations, but was correlated to female body size. Only larger females produced clutches of three eggs. Females of the small-sized E. nanuzae produce eggs as large as those of medium-sized tropidurids, thus investing a considerable amount of energy to produce clutches resulting in high values of relative clutch mass.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Life history; Interpopulational variation; Squamata.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000100008
Imagem não selecionada

Imprime registro no formato completo
Does the concept of spawning per recruit make sense? ArchiMer
Rochet, Marie-joelle.
Density dependence means that exploited fish populations exhibit earlier maturity, a faster growth rate, increased fecundity and reduced egg size. Here, the consequences of these effects on population dynamics, the estimation of spawning biomass per recruit and associated biological reference points are examined by a simulation model. The model is a self-regenerating model in which the population parameters (age at maturity, growth, fecundity, egg size) vary according to three classes of population abundance. Early life stages are characterized by a size-dependent growth and mortality model. It is concluded that spawning per recruit is an ambiguous concept because, if density dependence occurs in the adult population, the spawning biomass of a cohort is...
Tipo: Text Palavras-chave: Teleost fishes; Population dynamics; Life history; Density dependence; Biological reference points.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-485.pdf
Imagem não selecionada

Imprime registro no formato completo
Can stochastic variations in recruitment induce long-term fluctuations in the carrying capacity? ArchiMer
Fromentin, Jean-marc.
Long-term fluctuations in fish abundance are generally attributed to low frequency processes, such as human exploitation and/or environmental and climatic changes. Based on recent studies and simple simulations, this manuscript shows how long-term fluctuations in the carrying capacity and/or spawning stock biomass of a long-live species, such as the Atlantic bluefin tuna, may simply arise from stochastic variations in the recruitment. The implications of such a feature are discussed and compared among different Atlantic tunas and tuna-like species.
Tipo: Text Palavras-chave: Long-term fluctuations; Recruitment; Atlantic tunas; Stochastic variations; Life history; Lifespan; Spawning stock biomass.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00194/30499/28909.pdf
Imagem não selecionada

Imprime registro no formato completo
Variation in the link between oxygen consumption and ATP production, and its relevance for animal performance ArchiMer
Salin, Karine; Auer, Sonya K.; Rey, Benjamin; Selman, Colin; Metcalfe, Neil B..
It is often assumed that an animal's metabolic rate can be estimated through measuring the whole-organism oxygen consumption rate. However, oxygen consumption alone is unlikely to be a sufficient marker of energy metabolism in many situations. This is due to the inherent variability in the link between oxidation and phosphorylation; that is, the amount of adenosine triphosphate (ATP) generated per molecule of oxygen consumed by mitochondria (P/O ratio). In this article, we describe how the P/O ratio can vary within and among individuals, and in response to a number of environmental parameters, including diet and temperature. As the P/O ratio affects the efficiency of cellular energy production, its variability may have significant consequences for animal...
Tipo: Text Palavras-chave: Mitochondrial coupling efficiency; Life history; Oxidative stress; Reactive oxygen species; Trade-off; Uncoupling.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00414/52509/53322.pdf
Imagem não selecionada

Imprime registro no formato completo
Functional reorganization of marine fish nurseries under climate warming ArchiMer
Mclean, Matthew J.; Mouillot, David; Goascoz, Nicolas; Schlaich, Ivan; Auber, Arnaud.
While climate change is rapidly impacting marine species and ecosystems worldwide, the effects of climate warming on coastal fish nurseries have received little attention despite nurseries’ fundamental roles in recruitment and population replenishment. Here, we used a 26‐year time series (1987–2012) of fish monitoring in the Bay of Somme, a nursery in the Eastern English Channel (EEC), to examine the impacts of environmental and human drivers on the spatial and temporal dynamics of fish functional structure during a warming phase of the Atlantic Multidecadal Oscillation (AMO). We found that the nursery was initially dominated by fishes with r‐selected life‐history traits such as low trophic level, low age and size at maturity, and small offspring, which...
Tipo: Text Palavras-chave: Atlantic Multidecadal Oscillation; Climate change; Ecosystem function; English Channel; Fisheries; Functional traits; Life history; Recruitment.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00471/58276/60818.pdf
Imagem não selecionada

Imprime registro no formato completo
Maternal oxidative stress and reproduction: testing the constraint, cost and shielding hypotheses in a wild mammal ArchiMer
Viblanc, Vincent A.; Schull, Quentin; Roth, Jeffrey D.; Rabdeau, Juliette; Saraux, Claire; Uhlrich, Pierre; Criscuolo, François; Dobson, F. Stephen.
1.Oxidative stress has been proposed as a central causal mechanism underlying the life history trade-off between current and future reproduction and survival in wild animals. 2.Whereas mixed evidence suggests that maternal oxidative stress may act both as a constraint and a cost to reproduction, some studies have reported a lack of association between reproduction and maternal oxidative stress. 3.The oxidative shielding hypothesis offers an alternative explanation, suggesting that mothers may pre-emptively mitigate the oxidative costs of reproduction by increasing antioxidant defences prior to reproduction. 4.We tested the oxidative constraint, cost, and shielding hypotheses using a longitudinal field study of oxidative stress levels in a species that...
Tipo: Text Palavras-chave: Antioxidant; Body condition; Cost of reproduction; Life history; Mammal; Mitochondria; Trade-off.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00415/52679/53542.pdf
Imagem não selecionada

Imprime registro no formato completo
Comparison in waterborne Cu, Ni and Pb bioaccumulation kinetics between different gammarid species and populations: Natural variability and influence of metal exposure history ArchiMer
Urien, N.; Farfarana, A.; Uher, E.; Fechner, Lise; Chaumot, A.; Geffard, O.; Lebrun, J. D..
Kinetic parameters (uptake from solution and elimination rate constants) of Cu, Ni and Pb bioaccumulation were determined from two Gammarus pulex and three Gammarus fossrum wild populations collected from reference sites throughout France in order to assess the inter-species and the natural inter-population variability of metal bioaccumulation kinetics in that sentinel organism. For that, each population was independently exposed for seven days to either 2.5 mu g L-1 Cu (39.3 nM), 40 mu g L-1 Ni (681 nM) or 10 mu g L-1 Pb (48.3 nM) in laboratory controlled conditions, and then placed in unexposed microcosms for a 7-day depuration period. In the same way, the possible influence of metal exposure history on subsequent metal bioaccumulation kinetics was...
Tipo: Text Palavras-chave: Amphipods; Trace metals; Life history; Kinetic parameters; Inter-population variability.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00417/52840/54270.pdf
Imagem não selecionada

Imprime registro no formato completo
Population structure and spread of the Polychaete Diopatra biscayensis along the French Atlantic Coast: Human-assisted transport by-passes larval dispersal ArchiMer
Woodin, Sarah Ann; Wethey, David S.; Dubois, Stanislas F..
Intertidal populations of the ecosystem engineering polychaete, Diopatra biscayensis, were analyzed on the French Atlantic coast for three years with individual size estimated from tube-cap aperture. All but the northernmost population along the Bay of Biscay have yearly recruitment. Individuals live 3-5 years and are likely reproductive as one year olds. Simulations indicate dispersal distances are < 50 km; yet, populations also exist within the Normano-Breton Gulf in the western English Channel, more than 450 km from the northernmost Bay of Biscay population at La Trinité-sur-Mer. Three of the four populations in the Normano-Breton Gulf have no young of the year, but are near to active mussel culture where mussel seed is transported on ropes from...
Tipo: Text Palavras-chave: Diopatra biscayensis; Ecosystem engineer; Larval dispersal; Aquaculture; Life history; Human-assisted-transport; Connectivity.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00190/30128/28590.pdf
Imagem não selecionada

Imprime registro no formato completo
Biologie et pêche traditionnelle des crevettes pénéides dans l'embouchure d'un fleuve en milieur semi-aride (sud-ouest de Madagascar) ArchiMer
Laroche, Jean; Benoely,; Siaviri, A.
Traditional fishing using beach seines was studied over a period of one year at the mouth of the Onilahy river. The catches/efforts were recorded on a daily basis, biological sampling and the measurement of hydrological parameters being carried out twice a month. The moderate variations of salinity and temperature (14 < salinity < 35; 25 degrees C < temperature < 30 degrees C) which were observed in the estuary can be explained by the semiarid climate of the area. Four species of penaeid shrimps are to be found on the Onilahy: Metapenaeus monoceros, Panaeus indicus, Penaeus monodon and Penaeus japonicus, which were mainly caught at the subadult/adult stage with a Carapace length between 10 and 50 mm. The presence of these important sizes at the...
Tipo: Text Palavras-chave: Pêche; Estuaire; Dynamique population; Croissance; Taille corporelle; Cycle évolutif; Zone semi aride; Madagascar; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Metapenaeus monoceros; Rivière Onilahy; Afrique; Milieu saumâtre; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata; Fishing; Estuaries; Population dynamics; Growth; Body size; Life history; Semi arid zone; Malagasy Republic; Penaeus japonicus; Penaeus monodon; Penaeus indicus; Africa; Brackish water environment; Macrura; Decapoda; Crustacea; Arthropoda; Invertebrata.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00097/20828/42822.pdf
Imagem não selecionada

Imprime registro no formato completo
Integrative taxonomy revisits the ontogeny and trophic niches of Rimicaris vent shrimps ArchiMer
Methou, Pierre; Michel, Loic; Segonzac, Michel; Cambon-bonavita, Marie-anne; Pradillon, Florence.
Among hydrothermal vent species, Rimicaris exoculata is one of the most emblematic, hosting abundant and diverse ectosymbioses that provide most of its nutrition. Rimicaris exoculata co-occurs in dense aggregates with the much less abundant Rimicaris chacei in many Mid-Atlantic Ridge vent fields. This second shrimp also houses ectosymbiotic microorganisms but has a mixotrophic diet. Recent observations have suggested potential misidentifications between these species at their juvenile stages, which could have led to misinterpretations of their early-life ecology. Here, we confirm erroneous identification of the earliest stages and propose a new set of morphological characters unambiguously identifying juveniles of each species. On the basis of this...
Tipo: Text Palavras-chave: Hydrothermal vents; Stable isotopes; Taxonomy; Crustaceans; Life history; Trophic shift.
Ano: 2020 URL: https://archimer.ifremer.fr/doc/00640/75227/75368.pdf
Imagem não selecionada

Imprime registro no formato completo
Social parasitism in mammals with particular reference to neotropical primates Mastozool. neotrop.
Jones,Clara B..
Organisms often respond in ways that appear to benefit others rather than themselves. This phenomenon is consistent with the views of Darwin (1859) and Dawkins (1999) that individuals may exploit the responses of others. This phenomenon, "social parasitism", has been extensively investigated in social insects, particularly, ants. Other empirical studies have demonstrated social parasitism in fish, birds, and mammals. This paper reviews several possible examples of mammalian social parasitism, with an emphasis upon intraspecific social parasitism (ISP) in Neotropical primates. Social parasitism is discussed as a life history feature of long-lived, social organisms such as many primates, including humans. A simple mathematical model, applied to social...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Social parasitism; Phenotypic manipulation; Neotropical primates; Life history; Social evolution.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832005000100003
Imagem não selecionada

Imprime registro no formato completo
Natural history and distribution of Agalychnis craspedopus (Funkhouser, 1957) (Amphibia: Anura: Hylidae) Naturalis
Hoogmoed, M.S.; Cadle, J.E..
Aspects of reproductive behaviour, calls, clutch sizes, and larval morphology are described for Agalychnis craspedopus (Funkhouser, 1957). New distributional records extend the range of this species to southern Amazonian Peru. In most respects reproductive behaviour of A. craspedopus is similar to that of other phyllomedusine frogs. In southern Peru clutches were suspended above water-filled hollow cavities in logs, but in Ecuador tadpoles were found in a pool on the ground with no directlyoverhanging vegetation. Agalychnis craspedopus lays small clutches (mean = 17 eggs) with large eggs. Breeding possibly takes place throughout some years in southern Peru, but this undoubtedly varies depending on rainfall. Some aspects of reproductive biology, and tadpole...
Tipo: Article / Letter to the editor Palavras-chave: Amphibia; Anura; Hylidae; Phyllomedusine; Agalychnis craspedopus; Life history; Distribution; Amazonian lowlands; Neotropics; 42.82.
Ano: 1991 URL: http://www.repository.naturalis.nl/record/318246
Imagem não selecionada

Imprime registro no formato completo
A new species of Moneuptychia Forster (Lepidoptera: Satyrinae, Euptychiina) from the highlands of Southeastern Brazil Neotropical Entomology
Freitas,André V.L..
This paper describes a new species of Moneuptychia Forster from the summits of the Mantiqueira and Espinhaço mountain ranges in southeastern Brazil, details the morphology of adults and immatures of this species, and discusses the definition of the genus Moneuptychia.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Butterfly; Life history; Paramos.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2007000600014
Imagem não selecionada

Imprime registro no formato completo
A new genus and species of Euptychiina (Lepidoptera: Nymphalidae: Satyrinae) from southern Brazil Neotropical Entomology
Freitas,AVL; Mielke,OHH; Moser,A; Silva-Brandão,KL; Iserhard,CA.
This paper describes a new genus and a new species of Euptychiina from open grassland habitats (campos de cima da serra) in southern Brazil. The systematic position of this new taxon is discussed based on morphological and molecular data, and it is considered sister to Taydebis Freitas. Since the campos vegetation is considered endangered due to anthropogenic activities, this butterfly species deserves attention and should be included in future conservation plans for this biome.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Butterfly; Open grassland habitat; Life history.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2011000200012
Registros recuperados: 45
Primeira ... 123 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional