6 results
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2. Taxonomic contribution on the Andean species of Aegognathus (Coleoptera: Lucanidae) with two new species from Colombia and Peru.
- Author
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Cáceres, Juan Sebastián Dueñas, Ríos-Málaver, Cristóbal, and Grossi, Paschoal Coelho
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SPECIES , *SPECIES distribution , *DATA distribution , *NUMBERS of species , *INSECT conservation , *STAPHYLINIDAE - Abstract
The Andes represent one of the most important eco-regions of the world, fostering an enormous number of taxa associated with different altitudinal gradients. In the past two decades, there has been an increase in the description of different groups of insects, as in the case of the Lucanidae whose number of described species significantly rose in countries such as Peru and Bolivia. Aegognathus, a genus described originally from Peru, gained four new species during the last decade. Since then, the genus has not received proper taxonomic treatment, lacking updated information such as the actual distribution of some species, genitalic descriptions, female descriptions and identification keys. This paper aims to offer new taxonomic knowledge for the Andean species of Aegognathus, with a redescription of the type species, A. waterhousei Leuthner, the description of two new species and an identification key for the Andean taxa, as well as, the discussion of some possible implications in future conservation studies related to the distribution data of the studied taxa. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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- View/download PDF
3. New caviomorph rodents from the late Oligocene of Salla, Bolivia: taxonomic, chronological, and biogeographic implications for the Deseadan faunas of South America.
- Author
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Pérez, María Encarnación, Arnal, Michelle, Boivin, Myriam, Vucetich, María Guiomar, Candela, Adriana, Busker, Felipe, and Quispe, Bernardino Mamani
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OLIGOCENE Epoch , *RODENTS , *ANIMALS , *NUMBERS of species , *LATITUDE - Abstract
Caviomorph rodents have been an important component of South American mammal faunas at least since the Oligocene. Those from the Deseadan South American Land Mammal Age (SALMA; late Oligocene) have been exhaustively studied because they are considered key to understanding the evolution of South American rodents. Deseadan faunas are widely distributed from northern Peru to central Patagonia, with those from Salla (Bolivia) and Cabeza Blanca (Argentinean Patagonia) being the most diverse. Recent studies of Deseadan rodents at some localities in high (Cabeza Blanca, Punta Nava, Scarritt Pocket) and low (Contamana) latitudes revealed greater taxonomic diversity. However, at middle latitudes, Salla has not received the same attention, despite being exceptional in terms of the abundance and high-quality preservation of specimens. The aim of this work is to report new caviomorph rodents from Salla, and to discuss their systematic and palaeobiogeographical implications in the context of the South American Deseadan caviomorph assemblages. We describe two new genera (†Lapazomys gen. nov. and †Cholamys gen. nov.) and five new species (†Migraveramus lavocati sp. nov., †Sallamys woodi sp. nov., †Lapazomys hartenbergeri sp. nov., †Protosteiromys pattersoni sp. nov. and †Cholamys tetralophodonta sp. nov.). These include the first erethizontids and the oldest Cavioidea sensu stricto for middle and low latitudes. The increase in the number of species corroborates the existence of an important rodent diversification already evidenced in the late early/early late Oligocene. In addition, the new rodents lessen the degree of endemism of the Salla rodent fauna proposed in previous papers. We interpret that the differences among Deseadan assemblages from low, middle and high latitudes are due essentially to climatic, historical and local environmental conditions, whereas diachronism seems less important in the modelling of faunas. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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4. Basin-scale analysis of rainfall and runoff in Peru (1969–2004): Pacific, Titicaca and Amazonas drainages.
- Author
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Lavado Casimiro, Waldo Sven, Ronchail, Josyane, Labat, David, Espinoza, Jhan Carlo, and Guyot, Jean Loup
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RAINFALL , *RUNOFF , *HYDROLOGY ,LAKE Titicaca (Peru & Bolivia) - Abstract
According to the Peruvian agricultural ministry, the Pacific watersheds where the great cities and intense farming are located only benefit from 1% of the available freshwater in Peru. Hence a thorough knowledge of the hydrology of this region is of particular importance. In the paper, analysis of this region and of the two other main Peruvian drainages, the Titicaca and Amazonas are reported. Rainfall and runoff data collected by the Peruvian National Service of Meteorology and Hydrology (SENAMHI) and controlled under the Hydrogeodynamics of the Amazon Basin (HyBAm) project is the basis of this basin-scale study that covers the 1969–2004 period. Beyond the strong contrasting rainfall conditions that differentiate the dry coastal basins and the wet eastern lowlands, details are given about in situ runoff and per basin rainfall distribution in these regions, and about their different altitude–rainfall relationships. Rainfall and runoff variability is strong in the coastal basins at seasonal and inter-annual time scales, and related to extreme El Niño events in the Pacific Ocean. However, rainfall and runoff are more regular in the Andes and Amazonas at the inter-annual time scale. Warm sea-surface temperatures in the northern tropical Atlantic tend to produce drought in the southern Andes basins. Moreover, significant trends and change-points are observed in the runoff data of Amazonas basins where rainfall and runoff decrease, especially after the mid-1980s and during the low-stage season. Almost all the coastal basins show some change in minimum runoff during the last 35 years while no change is observed in rainfall. This means that human activity may have changed runoff in this region of Peru, but this hypothesis deserves more study. Editor Z.W. Kundzewicz; Associate editor Š. Blažková Citation Lavado C., W.S., Ronchail, J., Labat, D., Espinoza, J.C. and Guyot, J.L., 2012. Basin-scale analysis of rainfall and runoff in Peru (1969–2004): Pacific, Titicaca and Amazonas watersheds. Hydrological Sciences Journal, 57 (4), 625–642. [ABSTRACT FROM PUBLISHER]
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- 2012
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5. Do unintended pregnancies carried to term lead to adverse outcomes for mother and child? An assessment in five developing countries.
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Marston, Cicely and Cleland, John
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UNWANTED pregnancy , *MOTHER-child relationship - Abstract
This paper investigates whether children later reported as having been unwanted or mistimed at conception will, when compared with children reported as wanted, show adverse effects when the following criteria are applied: receipt of antenatal care before the sixth month of gestation, supervised delivery, full vaccination of the child, and child growth (stunting). The study uses data from five recent Demographic and Health Survey enquiries in Bolivia, Egypt, Kenya, Peru, and the Philippines. In Peru, children unwanted at conception were found to have significantly worse outcomes than other children, but in the other countries, a systematic effect was found only for receipt of antenatal care. Weak measurement of the complex concept of wantedness may have contributed to these results. Birth order of the child, with which wantedness is inextricably linked, has more powerful and pervasive effects, with first-born and second-born children being much less likely to show adverse effects. [ABSTRACT FROM AUTHOR]
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- 2003
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6. 'All that glitters is not gold': the effects of the COVID-19 pandemic on artisanal and small-scale gold mining and supply chains in Peru.
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Smith-Roberts, Ashley, Bruckner, Kristi Disney, Bellido, Verónica Morelli, Ossandón, Hugo Frías, Nayak, Meera, Smith, Nicole M., and Urrego, Linda Jaramillo
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COVID-19 pandemic , *GOLD mining , *SUPPLY chains , *COVID-19 , *GOLD , *MINING methodology - Abstract
This article explores the impact of COVID-19 on artisanal and small-scale gold mining (ASGM) supply chains in Peru between spring 2020 and early 2021. This analysis delves into the effects of the pandemic on the ASGM sector and the illicit flow of gold, including the effect of the mandated lockdown on the Peruvian economy, the price of gold and its impact on artisanal and small-scale mining communities, the socio-economic consequences of the quarantine on Peru's ASGM population, and the impact of lockdown on the gold supply chain. This study suggests the artisanal and small-scale mining formalization process in Peru was greatly impacted by the coronavirus pandemic, which brought complications such as increased criminal activity and violence along the gold supply chain. Similar trends can be seen in ASGM populations around the globe, and case studies from Zimbabwe, Colombia, Bolivia, and Chile explore how different governments have handled the effect of COVID-19 on the ASGM sector. This article highlights recommendations for governments and other key stakeholders to consider for supporting and strengthening ASGM communities, the gold supply chain, and the pursuit of formalization in Peru and worldwide. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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