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| Registros recuperados: 40 | |
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| Doorenweerd, C.; Nieukerken, E.J. van; Sohn, J.-C.; Labandeira, C.C.. |
| With phylogenetic knowledge of Lepidoptera rapidly increasing, catalysed by increasingly powerful molecular techniques, the demand for fossil calibration points to estimate an evolutionary timeframe for the order is becoming an increasingly pressing issue. The family Nepticulidae is a species rich, basal branch within the phylogeny of the Lepidoptera, characterized by larval leaf-mining habits, and thereby represents a potentially important lineage whose evolutionary history can be established more thoroughly with the potential use of fossil calibration points. Using our experience with extant global Nepticulidae, we discuss a list of characters that may be used to assign fossil leaf mines to Nepticulidae, and suggest useful methods for classifying... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Baltic amber; Calibration points; Dakota formation; Evolutionary history; Extinction; Fossil record; Larvae; Leaf mining; Plant hosts; Stigmella; Stigmellites. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/648751 |
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| Sánchez,Begoña; Prado,José Luis; Alberdi,María Teresa. |
| To reconstruct the diet and habitat preference of fossil horses, we measured the carbon and oxygen isotope composition of 35 bone and tooth samples of Equus (Amerhippus) neogeus Lund, Hippidion principale (Lund), and Hippidion devillei (Gervais) from 10 different Pleistocene localities in the Pampean region (Argentina). To compare the three species by stratigraphic age, we divided the samples into three groups: lower Pleistocene, middle-late Pleistocene and latest Pleistocene. Samples of Hippidion devillei from the lower Pleistocene were more homogeneous, with δ13C values ranging between -11.73 to -9.79‰. These data indicate a diet exclusively dominated by C3 plants. In contrast, Hippidion principale and Equus (Amerhippus) neogeus from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Equus (Amerhippus); Hippidion; Paleodiet; Ecology; Extinction; Pleistocene; Papean region; South America. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000200012 |
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| Nijman, V.; Vonk, R.. |
| Global biogeography and phylogeography have gained importance as research topics in zoology, as attested by the steady increase in the number of journals devoted to this topic and the number of papers published. Yet, in a globalising world, with species reintroductions, invasions of alien species, and large-scale extinctions, unravelling the true biogeographic relationships between areas and species may become increasingly difficult. We present an introduction to the symposium ‘Biogeography: explaining and predicting species distributions in space and time’ held in Amsterdam in 2007, and the resulting papers as published in this special issue, including papers on crustaceans, birds and mammals. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Extinction; Globalization; Invasions; Reintroductions; Zoogeography; 42.65. |
| Ano: 2008 |
URL: http://www.repository.naturalis.nl/record/280455 |
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| FARIAS, I. P.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; COUTINHO, M. E.; MAGNUSSON, W. E.; VALADÃO, R. M.; CAMPOS, Z.. |
| Caiman crocodilus habita praticamente todos os tipos de ambientes de zonas úmidas de baixa altitude na região Neotropical, sendo a espécie dentre os crocodilianos com maior distribuição na América Latina. No Brasil, ocorre naturalmente na região Norte e em parte das regiões Centro-Oeste e Nordeste, sua extensão de ocorrência estimada para o país é de 5.525.664 km². É uma espécie adaptável a ambientes antropizados, podendo ser encontrada em todos os habitat fluviais e lacustres presentes dentro de sua área de distribuição, ocorrendo em grande número ao longo das bacias Amazônica e Tocantins/Araguaia, especialmente em rios de água branca. Embora C. crocodilus sofra pressão devido ao uso ilegal (caça), destruição e perda de habitat, principalmente em... |
| Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148385 |
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| CAMPOS, Z.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; COUTINHO, M. E.; FARIAS, I. P.; MAGNUSSON, W. E.; VALADÃO, R. M.. |
| Caiman yacare é encontrado nas regiões alagadas do nordeste e leste da Bolívia, no Pantanal brasileiro e afluentes do rio Madeira, no Paraguai e no nordeste da Argentina. Sua extensão de ocorrência estimada para o território brasileiro é de 547.865 km². Os levantamentos populacionais confirmam que, no Pantanal brasileiro, Caiman yacare apresenta uma das mais vigorosas populações naturais de crocodilianos no mundo, com densidades superiores a 100 ind/km², distribuídos por toda planície Pantaneira. O tamanho populacional em toda essa região está na ordem de milhões de indivíduos. Aparentemente, esta espécie apresenta maior resiliência às alterações ambientais e à caça do que as demais espécies de crocodilianos brasileiros. Há conectividade com populações dos... |
| Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148386 |
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| Abbott, Brant; van Kooten, G. Cornelis. |
| Tigers are a threatened species that might soon disappear in the wild. Not only are tigers threatened by deteriorating and declining habitat, but poachers continue to kill tigers for traditional medicine, decoration pieces and so on. Although international trade in tiger products has been banned since 1987 and domestic trade within China since 1993, tigers continue to be poached and Chinese entrepreneurs have established tiger farms in anticipation of their demise. While China desires to permit sale of tiger products from captive-bred tigers, this is opposed on the grounds that it likely encourages illegal killing. Instead, wildlife conservationists lobby for more spending on anti-poaching and trade-ban enforcement. In this study, a mathematical... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Endangered species; Extinction; Wildlife farming and bioeconomics; Environmental Economics and Policy; Q57; Q27; C61; F13. |
| Ano: 2009 |
URL: http://purl.umn.edu/46994 |
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| Fernandes,Fernando Moreira; Rego,Juliana Ordones. |
| Dimorphandra wilsonii Rizzini is a rare species. Although cited as endemic to the Brazilian state of Minas Gerais, it has been recorded only for the municipalities of Paraopeba and Caetanópolis and therefore has not been extensively studied. This long-term, intensive survey, conducted from 2004 to 2012 in the central region of the state, was aimed at assessing its distribution, describing its habitat, and verifying its endemism, as well as assessing threats and determining its conservation status. Given the considerable size of the area to be studied and the difficulty of locating individuals of the species, we adopted popular participation as a complementary tool and we employed spatial distribution modeling. Communities were mobilized through the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extinction; Endemism; Faveiro-de-wilson; Inventory; Popular participation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062014000300017 |
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| SOUTO,PRISCILA C.; GONÇALVES,EDILMA P.; VIANA,JEANDSON S.; SILVA,JÚLIO C.A.; FERREIRA,DÉBORA T.R.G.; RALPH,LIDIANA N.. |
| Abstract: Seed companies are looking for promising, quick and effective alternatives to determine the physiological quality of seeds. The objective of the current work was to study the efficiency of the exudate - phenolphthalein pH test to evaluate the seeds of two lots of Libidibia ferrea (Mart. ex Tul.) L. P. Queiroz var. ferrea. The statistical design for the the exudate - phenolphthalein pH test was completely randomized with four replicates of 50 seeds in a factorial design (2 x 5), two seed lots and five soaking periods (30, 60, 90, 120, and 150 minutes), respectively, using two constant temperatures (25 and 30°C). The percentage of viability and germination of the seeds did not differ in the temperatures of 25 and 30°C and in the soaking periods by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extinction; Staining; Periods of imbibition; Quick tests. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700851 |
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| Jagt, J.W.M.. |
| The palaeobiology of echinoderms occurring in the Meerssen and Geulhem members is discussed and changes in diversity across the K/T boundary are documented. Using literature data on the ecology of extant faunas, the various echinoderm groups are considered. Naturally, such data can only be applied with due caution to fossil forms, whose skeletal morphology is often incompletely known. This holds especially true for asteroids, ophiuroids, and crinoids, which, upon death, rapidly disintegrate into jumbles of dissociated ossicles. Bioturbation, scavenging, and current winnowing all contribute to blurring the picture still further. However, data on extant forms do allow a preliminary subdivision of fossil species into various ecological groups, which are... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Echinodermata; Late Cretaceous; Early Palaeogene; Palaeobiology; K/T boundary; Extinction; 42.72; 38.22. |
| Ano: 2000 |
URL: http://www.repository.naturalis.nl/record/219135 |
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| COUTINHO, M. E.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; FARIAS, I. P.; MAGNUSSON, W. E.; VALADÃO, R. M.; CAMPOS, Z.. |
| Melanosuchus niger corre em sete países da América do Sul, sendo que a maior parte de sua distribuição é em território brasileiro, onde é encontrado nas regiões hidrográficas Amazônica e Tocantins/Araguaia, com ampla distribuição. No Brasil, sua extensão de ocorrência foi estimada em 3.575.374 km². Essa espécie ocupa ampla diversidade de áreas alagáveis, incluindo os grandes rios e suas lagoas marginais, várzeas e igapós, além de savanas sazonais inundáveis. Embora possa ser afetada pela perda de habitat e caça, acredita-se que a espécie não tenha sofrido redução populacional significativa, encontrando-se atualmente estável. Há conectividade com populações dos países vizinhos, à exceção da drenagem da Guiana Francesa, porém não se sabe o quanto influenciam... |
| Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148389 |
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| Rodrigues,Marcos. |
| Lagoa Santa, a small town in southeastern Brazil where naturalist Peter Lund lived, is regarded nowadays as an important historical site for the biological sciences. From 1847 to 1855, J.T. Reinhardt, hosted by Lund, collected 343 bird species. This material is an outstanding reference for many modern ornithological studies. The present paper reports the occurrence of some rare and threatened birds for the region of Lagoa Santa between 1998 and 2005. In this account I list the Rusty-margined Guan Penelope superciliaris Temminck, 1815; the Roseate Spoonbill Platalea ajaja Linnaeus, 1758; the Maguari Stork Ciconia maguari (Gmelin, 1789); the Wood Stork Mycteria americana Linnaeus, 1758; the Black Hawk-eagle Spizaetus tyrannus (Wied, 1820) and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biodiversity; Cerrado; Extinction; Range extension; Threatened species. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752008000100020 |
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| Allen, Craig R; U.S. Geological Survey, Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu; Holling, C. S.; Department of Zoology, University of Florida; holling@zoo.ufl.edu. |
| We present a conceptual framework that explores some of the forces creating innovation and novelty in complex systems. Understanding the sources of variability and novelty may help us better understand complex systems. Understanding complex phenomena such as invasions, migration, and nomadism may provide insight into the structure of ecosystems and other complex systems, and aid our attempts to cope with and mitigate these phenomena, in the case of invasions, and better understand and or predict them. Our model is broadly applicable to ecological theory, including community ecology, resilience, restoration, and policy. Characterizing the link between landscape change and the composition of species communities may help policymakers in their decision-making... |
| Tipo: Peer-Reviewed Insight |
Palavras-chave: Adaptation; Cross-scale; Extinction; Innovation; Invasion; Speciation. |
| Ano: 2010 |
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| Vendrame,Wagner; Faria,Ricardo Tadeu de; Sorace,Mauren; Sahyun,Sandra Aparecida. |
| Orchids are lush and highly valuable plants due to their diversity and the beauty of their flowers, which increases their commercialization. The family Orchidaceae comprises approximately 35,000 species, distributed among more than 1,000 distinct genera and 100,000 hybrids, totaling approximately 8% to 10% of all flowering plants. With the advance of agriculture and the constant destruction of their natural habitat, orchid species are collected in an indiscriminate manner by collectors and vendors, and this extractive activity threatens many species with extinction, drastically reducing their genetic variability in nature. Therefore, it is essential to seek alternatives that make the preservation of such species feasible using techniques with low... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Preservation; Orchidaceae; Ex situ conservation; Freezing tolerance; Extinction. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542014000300001 |
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| CAMPOS, Z.; BATAUS, Y. S. L.; RODRIGUES, J.; UHLIG, V. M.; ANDRADE, T. A.; BASSETTI, L. A.; COUTINHO, M. E.; FARIAS, I. P.; MAGNUSSON, W. E.; VALADÃO, R. M.. |
| Paleosuchus palpebrosus ocorre em dez países da América do Sul, porém, a maior parte de sua distribuição está no Brasil, ocorrendo em quase todos os Estados. Sua extensão de ocorrência estimada para o território brasileiro é de 7.536.119 km². Ocorre naturalmente em baixas densidades, ocupando ambientes de veredas, riachos, cabeceiras de rios e floresta inundada. Embora em algumas localidades a espécie enfrente ameaças da caça, oriunda de conflitos com moradores ribeirinhos, fragmentação, modificação e perda de habitat; causados por diversas atividades humanas, em especial a construção de hidrelétricas; acredita- se que a espécie não tenha sofrido redução populacional significativa a ponto de colocá-la em risco de extinção. No entanto, sua conservação é... |
| Tipo: Parte de livro |
Palavras-chave: Jacaré; Espécie em Extinção; Preservação da Natureza; Animal Selvagem; Biopreservation; Wild animals; Extinction. |
| Ano: 2022 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1148390 |
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| Registros recuperados: 40 | |
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