Agustin Estrada-Peña

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  Article: Mites and ticks (Acari). Chapter 7.4

  Maria Navajas, Alain Migeon, Agustin Estrada-Peña, Anne-Catherine Mailleux, Pablo Servigne, Radmila Petanović
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  ABSTRACT: International de Baillarguet, CS 30016, F-34988 Montferrier sur Lez, cedex, France 2 Faculty of Veterinary Medicine, Department of Parasitology, Miguel Servet 177, 50013-Zaragoza, Spain 3 Université catholique de Louvain, Unité d'écologie et de biogéographie, local B165.10, Croix du Sud, 4-5 (Bâtiment Car-noy), B-1348 Louvain-La-Neuve, Belgium 4 Service d' Abstract Th e inventory of the alien Acari of Europe includes 96 species alien to Europe and 5 cryptogenic species. Among the alien species, 87 are mites and 9 tick species. Besides ticks which are obligate ectoparasites, 14 mite species belong to the parasitic/predator regime. Among these species, some invaded Europe with rodents (8 spp.) and others are parasitic to birds (2 spp). Th e remaining 77 mite species are all phytopha-gous and among these 40% belong to the Eriophyidae (37 spp.) and 29% to the Tetranychidae (27 spp.) families. Th ese two families include the most signifi cant agricultural pest. Th e rate of introductions has exponentially increased within the 20 th century, the amplifi cation of plant trade and agricultural com-modities movements being the major invasion pathways. Most of the alien mite species (52%) are from North America, Asia (25%), and Central and South America (10%). Half of the ticks (4 spp.) alien to Europe originated from Africa. Most of the mite species are inconspicuous and data regarding invasive species and distribution range is only partially available. More research is needed for a better understand-ing of the ecological and economic eff ects of introduced Acari.
  Eds) Arthropod invasions in Europe. BioRisk. 01/2010; 4:149-192.
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  Dataset: Dataset

  A Estrada-Peña, Robert Farkas, Thomas G T Jaenson, Frank Koenen, Maxime Madder, Ilaria Pascucci, Mo Salman, Jordi Tarrés-Call, Frans Jongejan
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  Article: Deconstructing Ixodes ricinus: a partial matrix model allowing mapping of tick development, mortality and activity rates.

  A Estrada-Peña, D Estrada-Sánchez
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  ABSTRACT: A stage-structured Leslie matrix model of a partial, discrete population of Ixodes ricinus (Linnaeus) (Ixodida: Ixodidae) ticks was developed to elucidate the impact of climate trends on the distribution and phenology of this species in the western Palaearctic. The model calculates development and mortality rates for each instar and evaluates recruitment rates based on the development of the tick population. The model captures the changes in development and mortality rates, providing a coherent index of performance correlated with the tick's geographic range. Maximum development rates are recorded for latitudes south of 36 °N and are spatially correlated with sites of maximum temperature, highest saturation deficit and highest mortality. The maximum available developmental time (the total annual time during which temperature allows development) for I. ricinus in the western Palaearctic is < 45% of the total year. North of 60 °N, available developmental time decreases sharply to only 15% of the year. The latitudinal boundary at which survival rates sharply drop is 43-46 °N, clearly delimiting the classically recognized extent of the main tick populations. The pattern of activity for larval-nymphal synchrony shows a clear west-east pattern. The model demonstrates the impact of climate according to tick stage and geographic location, and provides a practical framework for testing how the tick's lifecycle is affected by climate change.
  Medical and Veterinary Entomology 04/2013; · 1.91 Impact Factor
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  Article: Association of environmental traits with the geographic ranges of ticks (Acari: Ixodidae) of medical and veterinary importance in the western Palearctic. A digital data set.

  A Estrada-Peña, Robert Farkas, Thomas G T Jaenson, Frank Koenen, Maxime Madder, Ilaria Pascucci, Mo Salman, Jordi Tarrés-Call, Frans Jongejan
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  ABSTRACT: We compiled information on the distribution of ticks in the western Palearctic (11°W, 45°E; 29°N, 71°N), published during 1970-2010. The literature search was filtered by the tick's species name and an unambiguous reference to the point of capture. Records from some curated collections were included. We focused on tick species of importance to human and animal health, in particular: Ixodes ricinus, Dermacentor marginatus, D. reticulatus, Haemaphysalis punctata, H. sulcata, Hyalomma marginatum, Hy. lusitanicum, Rhipicephalus annulatus, R. bursa, and the R. sanguineus group. A few records of other species (I. canisuga, I. hexagonus, Hy. impeltatum, Hy. anatolicum, Hy. excavatum, Hy. scupense) were also included. A total of 10,280 records was included in the data set. Almost 42 % of published references are not adequately referenced (and not included in the data set), host is reported for only 61 % of records and a reference to time of collection is missed for 84 % of published records. Ixodes ricinus accounted for 44.3 % of total records, with H. marginatum and D. marginatus accounting for 7.1 and 8.1 % of records, respectively. The lack of homogeneity of the references and potential pitfalls in the compilation were addressed to create a digital data set of the records of the ticks. We attached to every record a coherent set of quantitative descriptors for the site of reporting, namely gridded interpolated monthly climate and remotely sensed data on vegetation (NDVI). We also attached categorical descriptors of the habitat: a standard classification of land biomes and an ad hoc classification of the target territory from remotely sensed temperature and NDVI data. A descriptive analysis of the data revealed that a principal components reduction of the environmental (temperature and NDVI) variables described the distribution of the species in the target territory. However, categorical descriptors of the habitat were less effective. We stressed the importance of building reliable collections of ticks with specific references as to collection point, host and date of capture. The data set is freely downloadable.
  Experimental and Applied Acarology 07/2012; · 1.39 Impact Factor
• Article: Vector-Borne Pathogen Spread Through Ticks on Migratory Birds: A Probabilistic Spatial Risk Model for South-Western Europe.

  J Bosch, M J Muñoz, M Martínez, A de la Torre, A Estrada-Peña
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  ABSTRACT: Tick-borne pathogens can spread easily through the movements of infested birds. An important example is viruses that pose a threat to humans and that are carried in Hyalomma ticks that move from Africa into south-western Europe. This study evaluates the probability of arrival of migrating birds from Africa into Spain and the environmental suitability of different regions of Spain for the survival of tick stages introduced by these birds. This evaluation produced a spatial risk index measuring the probability that foreign tick populations will survive in the target area. Periods of highest risk were observed for large areas of Spain, from the second fortnight of April to the second fortnight of May. Although birds may arrive as early as January and massive migrations may take place in March, the environmental suitability for Hyalomma marginatum ticks is low in these periods and high mortality of the spread stages (nymphs) is expected. This study introduces new methods of objective analysis based on spatial and process-driven models for both ticks and hosts and critically evaluates the usefulness of spatial spreading methods for assessing the risk of tick-borne pathogens.
  Transboundary and Emerging Diseases 07/2012; · 1.81 Impact Factor