scholarly journals Distribución de garrapatas Rhipicephalus (Boophilus) microplus en bovinos y fincas del Altiplano cundiboyacense (Colombia)

2010 ◽  
Vol 11 (1) ◽  
pp. 73 ◽  
Author(s):  
Jesús Alfredo Cortés Vecino ◽  
Jesús Antonio Betancourt Echeverri ◽  
Jorge Argüelles Cárdenas ◽  
Luz Astrid Pulido Herrera
Keyword(s):  
Population Dynamics ◽  
Sea Level ◽  
Potential Risk ◽  
Boophilus Microplus ◽  
Future Research ◽  
First Report ◽  
Boophilus Microplus Ticks

<p>En Colombia, la presencia de la garrapata Rhipicephalus (Boophilus) microplus ha sido registrada en altitudes que oscilan entre 0 y 2.600 metros sobre el nivel del mar (msnm). Actualmente, no existen reportes de distribución de esta especie en el Altiplano cundiboyacense, zona geográfica de importancia nacional en la producción de leche. Para el presente trabajo se buscaron especímenes de cada uno de los estadios de la garrapata en bovinos y en potreros de 108 predios situados entre los 2.000 y 3.000 msnm, en las diferentes zonas del Altiplano cundiboyacense. Se colectaron 851 garrapatas, en total, de la especie R. (B.) microplus (100% de las muestras) en 34 predios ubicados entre los 1.966 y 2.903 msnm Este es el primer estudio en Colombia que registra la presencia de esta garrapata a una altitud superior a los 2.600 msnm y que caracteriza su distribución en el Altiplano cundiboyacense. Los resultados obtenidos demuestran la existencia de esta especie, ectoparásito de bovinos y vector de hemoparásitos, en zonas geográficas donde hasta hace algunos años no se registraba su presencia. Lo anterior plantea un panorama de riesgo para la presentación de babesiosis y anaplasmosis bovina en poblaciones altamente susceptibles. Estudios posteriores deberán definir la bioecología de esta garrapata en esta región y la prevalencia de infección en bovinos de los patógenos asociados.</p><p> </p><p><strong>Distribution of Rhipicephalus (Boophilus) microplus Ticks on Cattle and Farms from Altiplano Cundiboyacense (Colombia)</strong></p><p>In Colombia, the presence of Rhipicephalus (Boophilus) microplus ticks has been registered in altitudes ranging from zero to 2,600 meters above the sea level. Currently, there are no reports of its distribution in the Altiplano Cundiboyacense, an important dairy region of Colombia. In the present work, ticks of each stage were searched on cattle and pastures from 108 farms ranging from 2,000 to 3,000 meters of altitude. A total of 851 specimens of R. (B.) microplus (100% of total) were collected from 34 farms located between 1,966 and 2,903 meters of altitude. This is the first report in Colombia on the presence of this tick in altitudes higher than 2,600 meters and on its distribution in the Altiplano Cundiboyacense. These results confirm the existence of this tick as an ectoparasite of cattle, vector of haemoparasites, in areas where it was no previously reported, and they present a potential risk of transmission of these pathogens in highly susceptible bovine populations. Future research must define the bioecology and population dynamics of this tick in that region and the prevalence of cattle infected with tick-borne pathogens.</p>

Prevalence and potential risk factors for amitraz resistance in Boophilus microplus ticks in cattle farms in the State of Yucatan, Mexico

2006 ◽  
Vol 75 (3-4) ◽  
pp. 280-286 ◽  
Author(s):  
R.I. Rodríguez-Vivas ◽  
F. Rodríguez-Arevalo ◽  
M.A. Alonso-Díaz ◽  
H. Fragoso-Sanchez ◽  
V.M. Santamaria ◽  
...  
Keyword(s):  
Risk Factors ◽  
Potential Risk ◽  
The State ◽  
Boophilus Microplus ◽  
Potential Risk Factors ◽  
Boophilus Microplus Ticks ◽  
Cattle Farms

Prevalence and potential risk factors for organophosphate and pyrethroid resistance in Boophilus microplus ticks on cattle ranches from the State of Yucatan, Mexico

2006 ◽  
Vol 136 (3-4) ◽  
pp. 335-342 ◽  
Author(s):  
R.I. Rodriguez-Vivas ◽  
M.A. Alonso-Díaz ◽  
F. Rodríguez-Arevalo ◽  
H. Fragoso-Sanchez ◽  
V.M. Santamaria ◽  
...  
Keyword(s):  
Risk Factors ◽  
Potential Risk ◽  
Pyrethroid Resistance ◽  
The State ◽  
Boophilus Microplus ◽  
Potential Risk Factors ◽  
Boophilus Microplus Ticks

scholarly journals Human Prehistoric Demography Revealed by the Polymorphic Pattern of CpG Transitions

2020 ◽  
Vol 37 (9) ◽  
pp. 2691-2698 ◽  
Author(s):  
Xiaoming Liu
Keyword(s):  
Population Dynamics ◽  
Population Expansion ◽  
Future Research ◽  
Human Populations ◽  
Neolithic Revolution ◽  
Cpg Sites ◽  
Hunting And Gathering ◽  
Genome Wide ◽  
Polymorphic Pattern ◽  
Improved Model

Abstract The prehistoric demography of human populations is an essential piece of information for illustrating our evolution. Despite its importance and the advancement of ancient DNA studies, our knowledge of human evolution is still limited, which is also the case for relatively recent population dynamics during and around the Holocene. Here, we inferred detailed demographic histories from 1 to 40 ka for 24 population samples using an improved model-flexible method with 36 million genome-wide noncoding CpG sites. Our results showed many population growth events that were likely due to the Neolithic Revolution (i.e., the shift from hunting and gathering to agriculture and settlement). Our results help to provide a clearer picture of human prehistoric demography, confirming the significant impact of agriculture on population expansion, and provide new hypotheses and directions for future research.

scholarly journals Ecología de las poblaciones de plantas en una selva húmeda de México

2017 ◽  
pp. 121
Author(s):  
Miguel Martínez-Ramos ◽  
Elena Álvarez-Buylla
Keyword(s):  
Population Dynamics ◽  
Life History Evolution ◽  
Life Forms ◽  
Future Research ◽  
Tropical Rain Forests ◽  
Field Station ◽  
Plant Life Forms ◽  
Demographic Patterns ◽  
Plant Population Ecology ◽  
Conservation And Management

This paper reviewing plant population ecology studies that have done in Mexican tropical rain forests, particularly at the Los Tuxtlas Tropical Field Station (UNAM). The review considers next topics: (i) population structure and demographic patterns, (ii) population dynamics, (iii) life-history evolution, and (iv) the importance of demography and genetics for conservation and management of tropical rain forest plant products. The studies show an important advance in the description of patterns, in the analysis of population dynamics, and in the detection of some key demographic elements that can be important for forest conservation and management. However, the understanding of causes that originate such patterns and dynamics is yet poor. The studies have focused mainly on abundant arboreal plant species; other plant life-forms and rare species have received virtually null attention. After pointing out conclusions gained from our review, we propose some perspectives for future research.

scholarly journals Assessment of the Potential Risk of Rock-Climbing for Cliff Plant Species and Natural Protected Areas of Spain

2021 ◽  
Vol 9 ◽  
Author(s):  
Indradatta deCastro-Arrazola ◽  
Martí March-Salas ◽  
Juan Lorite
Keyword(s):  
Protected Areas ◽  
Plant Species ◽  
Potential Risk ◽  
Field Studies ◽  
Rock Climbing ◽  
Future Research ◽  
Small Scale ◽  
Potential Threat ◽  
Natural Protected Areas ◽  
Priority Species

In recent years, the popularity of rock-climbing has grown tremendously, setting an increasing pressure on cliff habitats. Climbing may be particularly harmful in the Mediterranean biome due to its appropriate environmental conditions for climbing. A few studies have identified the effect of climbing on plant diversity at a small-scale (namely locally or even just in specific climbing areas). However, no studies exist assessing the potential risk of rock-climbing on a broad-scale (e.g., regional or national). The study aims to identify the priority locations and priority cliff plant species in Spain to focus future study efforts. Spain was selected because it is a plant biodiversity hotspot, with a great diversity of endemic and endangered species, and one of the most popular destinations for climbers. We used a geographic information system-based approach to model the spatial concurrence among Spanish climbing areas (and climbing intensity), natural protected areas (NPAs), and distribution of threatened cliff plants (and their IUCN threat category). We found that 53.5% of climbing areas in Spain are located within a NPA, most of them falling into NPAs of medium protection level. We mapped 151 threatened cliff plants, identifying four medium priority Mediterranean locations and eight priority species in which future research efforts should be focused. High-priority study locations are absent in Spain according to our spatial modeling. For the first time on a national scale, this study identifies areas in which climbing represents a potential threat for cliff habitats and threatened plants. These findings contribute to designing field studies on the effects of rock-climbing on Mediterranean cliffs, laying the groundwork for a sustainable, yet challenging, balance between the protection of these unique habitats and rock-climbing.

Anabaenopsis morphospecies (Cyanobacteria, Nostocales) from Los Patos shallow lake (Province of Buenos Aires, Argentina)

Phytotaxa ◽  
2016 ◽  
Vol 272 (3) ◽  
pp. 173 ◽  
Author(s):  
ANABELLA AGUILERA ◽  
JIŘĺ KOMÁREK ◽  
RICARDO O. ECHENIQUE
Keyword(s):  
Population Dynamics ◽  
Species Richness ◽  
Shallow Lake ◽  
Algal Blooms ◽  
Buenos Aires ◽  
Morphological Diversity ◽  
Abundant Species ◽  
American Continent ◽  
First Report ◽  
Almost All

The genus Anabaenopsis comprises about 20 morphospecies distributed in plankton of tropical, subtropical and temperate regions during warm periods. The morphological diversity and population dynamics of Anabaenopsis species from one artificial shallow lake from the Province of Buenos Aires, Argentina, was studied during summer 2005 and 2006; and from April 2012 to May 2014. The most common and abundant species were identified as A. elenkinii and A. cf. cunningtonii (first report in Argentina). Anabaenopsis circularis and A. milleri (first report in the American continent and Argentina) were less common, whereas A. nadsonii was rarely observed. Almost all species contributed to algal blooms during warm periods. However, some species were registered even under the lowest temperatures recorded (7.5 °C) and sustained biovolume also during winter (A. milleri, A. elenkinii and A. cf. cunningtonii). These results indicate that some species of the genus are capable of growing at temperatures much lower than 20°C. The species richness noted in this study suggests that there is likely much more diversity remaining on this genus to be reported in Argentina.

Supraglacial Streams and Rivers

2019 ◽  
Vol 47 (1) ◽  
pp. 421-452 ◽  
Author(s):  
Lincoln H Pitcher ◽  
Laurence C. Smith
Keyword(s):  
Sea Level ◽  
Transport Processes ◽  
Future Research ◽  
Sea Level Changes ◽  
Ice Dynamics ◽  
Surface Mass ◽  
Ice Shelves ◽  
Streams And Rivers ◽  
Ice Surface ◽  
Global Sea Level

Supraglacial meltwater channels that flow on the surfaces of glaciers, ice sheets, and ice shelves connect ice surface climatology with subglacial processes, ice dynamics, and eustatic sea level changes. Their important role in transferring water and heat across and into ice is currently absent from models of surface mass balance and runoff contributions to global sea level rise. Furthermore, relatively little is known about the genesis, evolution, hydrology, hydraulics, and morphology of supraglacial rivers, and a first synthesis and review of published research on these unusual features is lacking. To that end, we review their ( a) known geographical distribution; ( b) formation, morphology, and sediment transport processes; ( c) hydrology and hydraulics; and ( d) impact on ice sheet surface energy balance, heat exchange, basal conditions, and ice shelf stability. We conclude with a synthesis of key knowledge gaps and provide recommendations for future research. ▪ Supraglacial streams and rivers transfer water and heat on glaciers, connecting climate with subglacial hydrology, ice sliding, and global sea level. ▪ Ice surface melting may expand under a warming climate, darkening the ice surface and further increasing melt.

scholarly journals Wildlife species, Ixodid fauna and new host records for ticks in an Amazon forest area, Rondônia, Brazil

2018 ◽  
Vol 27 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Namor Pinheiro Zimmermann ◽  
André de Abreu Rangel Aguirre ◽  
Vinicius da Silva Rodrigues ◽  
Marcos Valério Garcia ◽  
Jansen Fernandes Medeiros ◽  
...  
Keyword(s):  
Boophilus Microplus ◽  
Forest Area ◽  
Amazon Forest ◽  
Free Living ◽  
New Host ◽  
First Report ◽  
Wildlife Species ◽  
Prevalent Species ◽  
New Host Records

Abstract The objective of this work was to evaluate the diversity of ticks associated with free-living animals and to investigate new host records for ticks. Ticks were collected from animals rescued during the flood of the Jamari River in the municipality of Ariquemes, state of Rondônia, North Region of Brazil. A total of 39 animals were captured, out of which 10 were amphibians, 19 were reptiles and 10 were mammals. A total of 127 ticks of the Amblyomma genus were collected from these animals, distributed among seven species: Amblyomma dissimile, Amblyomma geayi, Amblyomma humerale , Amblyomma longirostre, Amblyomma nodosum , Amblyomma rotundatum and Amblyomma varium. In addition, one specimen of Rhipicephalus (Boophilus) microplus was collected. Among these specimens, 85 were adults and 42 were nymphs, with A. rotundatum being the most prevalent species. An Amblyomma spp. larvae was also collected from a lizard (Uranoscodon superciliosus), and one Amblyomma calcaratum and one Amblyomma dubitatum were recovered from the environment, thus totaling 130 ticks. Among the Ixodidae collected from different hosts, we provide the first report for the species A. rotundatum parasitizing Rhinella major, U. superciliosus, Leptophis ahaetulla, Chironius multiventris, and Mastigodryas boddaerti, as well as of A. humerale parasitizing U. superciliosus, A. geayi parasitizing Choloepus didactylus, and Rhipicephalus (B.) microplus parasitizing Alouatta puruensis.

Sign in / Sign up

Export Citation Format

Share Document