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| Registros recuperados: 22 | |
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| ZÚCCARI, C. E. S. N.; SERENO, J. R. B.. |
| The present work aimed to present a literature research about two deer species - Blastocerus dichotomus (llliger, 1815) - Cervo-do-pantanal and Ozotocerus bezoarticus (Linnaeus, 1758) - Veado-campeiro, due to their importance in Central Brazil. The main aspects studied were: species biology, density and populational distribution; factors related to their decreased numbers; and the use of biotechniques of animal husbandry for propagation and conservation of deer, as environmental compensation. Using available data in the literature, it is possible to realize that depending on the region studied, both deer species showed population fluctuation in the past years. Apart local population density, both are part of the red data book on native Brazilian species of... |
| Tipo: Documentos (INFOTECA-E) |
Palavras-chave: Cervo; Preservação; Preservation.; Biologia Animal; Densidade Demográfica; Reprodução Animal; Veado.; Cervidae; Demography; Reproduction; Zoology.. |
| Ano: 2006 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570264 |
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| Arnaud-haond, Sophie; Marba, Nuria; Diaz-almela, Elena; Serrao, Ester A.; Duarte, Carlos M.. |
| The diversity-stability relationship is the subject of a long-standing debate in ecology, but the genetic component of diversity has seldom been explored. In this study, we analyzed the interplay between genetic diversity and demographic responses to environmental pressures. This analysis included 30 meadows formed by the Mediterranean endemic seagrass, Posidonia oceanica, showing a wide range of population dynamics ranging from a near equilibrium state to steep decline due to strong environmental pressures close to aquaculture installations. Our results show that sedimentation rates are much better predictors of mortality than clonal or genetic components. An unexpected positive trend was observed between genotypic diversity and mortality, along with a... |
| Tipo: Text |
Palavras-chave: Seagrass; Demography; Clonality; Genetic richness; Diversity-stability; Posidonia oceanica. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00006/11693/8498.pdf |
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| Baquero,Oswaldo Santos; Chiozzotto,Evelyn Nestori; Garcia,Rita de Cassia Maria; Amaku,Marcos; Ferreira,Fernando. |
| A two-stage cluster sample design was used to estimate population parameters of dogs and cats of the urban area of Votorantim, São Paulo State, Brazil, to support the planning and implementation of population management programs for companion animals. For dogs, the total and density estimates were 27,241 dogs (95% confidence interval [CI]=23,903-30,578) and 951 dogs km-2 (95% CI=835-1,068), respectively. For cats, these estimates were 5,579 cats (95% CI=3,595-7,562) and 195 cats km-2 (95% CI=126-264). Cost was the most prevalent reason for not sterilizing the animals (33%, 95% CI=23%-44%, Deff=6.1). The percentage of interviewees that expressed reasons for abandoning their animals was equal to 9 (95% CI=5-13, Deff=2.1). Other estimates were obtained,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dogs; Cats; Population management; Demography; Sampling; Estimates. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015001102039 |
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| MARQUES,MÁRCIA C. M.; JOLY,CARLOS ALFREDO. |
| As estruturas de tamanho e espacial de uma população de Calophyllum brasiliense (Clusiaceae) foram estudadas em uma área de 3600 m2 de floresta higrófila localizada em Brotas, SP. No primeiro censo, foram marcados 1658 indivíduos e, após um ano, este número havia aumentado para 1706. A estrutura de tamanho não mudou durante o período de estudo, com predomínio de plântulas (indivíduos £ 0,2 m) e jovens (> 0,2 - 2 m) e menor número de subadultos (> 2 - 10 m) e adultos (> 10 m). A mortalidade em plântulas (29,7%) e jovens (5,3%) foi bem maior que em subadultos (0,7%) e adultos (0%), e teve como causa principal o soterramento na época chuvosa. O maior número de plantas novas concentrou-se nos locais mais baixos da área, onde sementes... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Swamp forest; Population dynamics; Demography; Calophyllum brasiliense. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042000000100012 |
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| Guinnane, Timothy W.; Moehling, Carolyn M.; Grada, Cormac O. |
| Ireland's relatively late and feeble fertility transition remains poorly-understood. The leading explanations stress the role of Catholicism and a conservative social ethos. This paper reports the first results from a project that uses new samples from the 1911 census of Ireland to study fertility in Dublin and Belfast. Our larger project aims to use the extensive literature on the fertility transition elsewhere in Europe to refine and test leading hypotheses in their Irish context. The present paper uses a sample from the Dublin suburb of Pembroke to take a first look at the questions, data, and methods. This sample is much larger than those used in previous studies of Irish fertility, and is the first from an urban area. We find considerable support for... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Ireland; Fertility; Demography; Labor and Human Capital; J1; N3. |
| Ano: 2001 |
URL: http://purl.umn.edu/28434 |
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| Planque, Benjamin; Fromentin, Jean-marc; Cury, Philippe; Drinkwater, Kenneth F.; Jennings, Simon; Perry, R. Ian; Kifani, Souad. |
| Evidence has accumulated that climate variability influences the state and functioning of marine ecosystems. At the same time increasing pressure from exploitation and other human activities has been shown to impact exploited and non-exploited species and potentially modify ecosystem structure. There has been a tendency among marine scientists to pose the question as a dichotomy, i.e., whether (1) "natural" climate variability or (2) fishery exploitation bears the primary responsibility for population declines in fish populations and the associated ecosystem changes. However, effects of both climate and exploitation are probably substantially involved in most cases. More importantly, climate and exploitation interact in their effects, such that climate may... |
| Tipo: Text |
Palavras-chave: Resilience; Marine ecosystems; Demography; Climate fishing interactions. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/2010/publication-7384.pdf |
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| Costa,Anne M.; Amorim,Francismare de O.; Anjos-Duarte,Cyntia S.; Joachim-Bravo,Iara S.. |
| Influence of different tropical fruits on biological and behavioral aspects of the Mediterranean fruit fly Ceratitis capitata (Wiedemann) (Diptera, Tephritidae). Studies on Ceratitis capitata, a world fruit pest, can aid the implementation of control programs by determining the plants with higher vulnerability to attacks and plants able to sustain their population in areas of fly distribution. The objective of the present study was to evaluate the influence of eight tropical fruits on the following biological and behavioral parameters of C. capitata: emergence percentage, life cycle duration, adult size, egg production, longevity, fecundity, egg viability, and oviposition acceptance. The fruits tested were: acerola (Malpighia glabra L.), cashew (Anacardium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Demography; Insects; Medfly; Nutritional ecology; Oviposition. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000300008 |
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| Janssens, M.. |
| L' urbanisation constitue pour les pays d Afrique sub-saharienne l élément clé de son processus de peuplement. Commencé plus tard que dans les autres régions du monde, le peuplement s' est accéléré rapidement, donnant lieu à une mobilité vers les villes depuis la fin de la Deuxième Guerre mondiale et surtout après les indépendances (Snrech 1994, Dubresson 1996). La région entre dans un processus d urbanisation extrêmement rapide, caractérisé par un processus de restructuration et de concentration du peuplement au bénéfice des villescapitales. Kalasa (1993) caractérise la vitesse du processus d urbanisation comme tout à fait exceptionnelle, sans égale dans aucune région du monde ni à aucune autre époque. |
| Tipo: Proceedings Paper |
Palavras-chave: Demography. |
| Ano: 1998 |
URL: http://hdl.handle.net/1834/1193 |
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| Sergievsky, So; Granovitch, Ai; Sokolova, Im. |
| The results of a 14-year survey of the populations of L. saxatilis and L. obtusata from one locality in the Kandalaksha Bay of the White Sea are presented. The periwinkles were found to be hosts of 10 castrating trematode species. Microphallus piriformes was the most abundant species with infection prevalence often exceeding 50%. Year-to-year variation of the infection prevalence was correlated in the two host species, probably reflecting fluctuations in the influx of trematode eggs to the shore. Long-term changes in population density are associated with the variation of the age structure of the winkles, suggesting a dependence of the population density on the success of the recruitment. Fluctuations in abundance and age composition were correlated in L.... |
| Tipo: Text |
Palavras-chave: Long-term; Population dynamics; Demography; Littorina; Trematoda. |
| Ano: 1997 |
URL: http://archimer.ifremer.fr/doc/00093/20395/18062.pdf |
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| Pautrel, Xavier. |
| This article studies how demography affects the outcome of the environmental policy in a macro-economic perspective, incorporating age-earning profiles in an OLG model à la Blanchard (1985) to capture the age structure effect of the demographic shocks. It first demonstrates, conversely to previous works of the related literature that a decrease in the birth rate may lower the steady-state per capita stock of physical capital even if the aggregate labor supply is exogenous. It also demonstrates that the ageing of population influences the macro-economic impact of the environmental policy according to the cause of the ageing and the life-cycle earnings assumption. Thus, with decreasing age-earning profiles, a lower birth rate reduces the detrimental impact... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Demography; Environment; Environmental Economics and Policy; Q56. |
| Ano: 2009 |
URL: http://purl.umn.edu/50325 |
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| CASTELLANI,TÂNIA TARABINI; SCHERER,KARLA ZANENGA; PAULA,GISELLE DE SOUZA. |
| Aspects of population dynamics and life history of Paepalanthus polyanthus (Bong.) Kunth, a sand dune monocarpic plant, were evaluated. A five year study was carried out on three permanent plots (5 m x 5 m) in a sand dune slack at Joaquina beach, Santa Catarina State, Brazil. From December 1986 to June 1989, the population decreased due to the death of the post reproductive plants and a low emergence of seedlings. In June 1989, a great recruitment occurred, but no plants survived. The population re-established itself by 1990-1991. The emergence and high survival of seedlings depended on periods of high pluviosity. Nevertheless, the summer flooding and episodes of drought represented key factors in mortality. The birth and mortality rates varied among the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Demography; Monocarpic plant; Sand dune slack; Paepalanthus polyanthus. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000200001 |
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| Registros recuperados: 22 | |
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