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Experimental & Applied Acarology

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https://www.readbyqxmd.com/read/28717996/patterns-of-oribatid-mite-species-diversity-testing-the-effects-of-elevation-area-and-sampling-effort
#1
Levan Mumladze, Maka Murvanidze, Mark Maraun
Elevational gradients in species diversity and species area relationships are two well established patterns that are not mutually exclusive in space and time. Elevation and area are both considered as good proxies to detect and characterize the patterns of species diversity distribution. However, such studies are hampered by the incomplete biodiversity data available for ecologists, which may affect the pattern perceptions. Using the large dataset of oribatid mite communities sampled in Georgia, we tested the effects of altitude and area on species distribution using various approaches, while explicitly considering the biases from sampling effort...
July 17, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28707033/impact-of-constant-versus-fluctuating-temperatures-on-the-development-and-life-history-parameters-of-tetranychus-urticae-acari-tetranychidae
#2
M S Y I Bayu, M S Ullah, Y Takano, T Gotoh
The impact of daily temperature fluctuations on arthropod life history parameters is inadequately studied compared with the ample amount of research that has been conducted on the effects of constant temperatures. Fluctuating temperatures are likely to be more realistic, as they are ecologically more similar to what these arthropods experience in nature. Here, we compared the impact of 11 constant temperatures that ranged from 10 to 35 °C with fluctuating temperatures with the same corresponding mean temperature and an amplitude of 10 °C between high (12 h) and low (12 h) temperatures on the development and life history parameters of Tetranychus urticae under continuous light conditions...
July 13, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28656486/abamectin-treatment-affects-glutamate-decarboxylase-expression-and-induces-higher-gaba-levels-in-the-citrus-red-mite-panonychus-citri
#3
Wei Dou, Wen-Kai Xia, Jin-Zhi Niu, Jin-Jun Wang
The citrus red mite, Panonychus citri, is one of the most economically and globally destructive mite pests of citrus. Acaricide resistance has been a growing problem in controlling this pest. As the main inhibitory neurotransmitter in organisms, γ-aminobutyric acid (GABA) is synthesized from the amino acid glutamate by the action of glutamate decarboxylases (GADs). In the present study, one novel GAD gene, PcGAD, was identified and characterized from P. citri. The opening reading frame of PcGAD contained 1548 nucleotides that encode 515 amino acids...
June 27, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28623498/minimal-barcode-distance-between-two-water-mite-species-from-madeira-island-a-cautionary-tale
#4
Ricardo García-Jiménez, Jose Luis Horreo, Antonio G Valdecasas
In this work, we compare morphological and molecular data in their ability to distinguish between species of water mites (Acari, Prostigmata, Hydrachnidia). We have focused on the two species of the genus Lebertia inhabiting the island of Madeira. While traditional morphological traits were initially sufficient to distinguish between these two species, the molecular data were more dependable on the kind of analysis carried out. Single arbitrary genetic distance (e.g. a K2P distance below 2%) may lead to the conclusion that the specimens under study belong to the same species...
June 16, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28597314/deltamethrin-as-inductor-agent-of-precocious-ovarian-degeneration-in-rhipicephalus-sanguineus-s-l-acari-ixodidae-ticks
#5
Maria Izabel Camargo-Mathias, Natalia Rubio Claret Pereira, Camila da Silva Reis, Cristiane Regina de Almeida, Douglas Rodrigo Dos Santos Mendes, Giselle Bezerra de Araújo, Lays Postali, Tober Figueroa, Allan Roberto Fernandes Ferreira, Juan Parente Santos, Patrícia Rosa de Oliveira
The cosmopolitan species Rhipicephalus sanguineus s.l. is one of the most widely distributed ticks all over the world. These ectoparasites are vectors of several pathogens and cause significant direct damage to their hosts. The biological success of these ectoparasites has been attributed to their ovaries and salivary glands, organs that ensure their survival in various environmental conditions. The importance of the ovaries in ticks is that, after mating, the individuals are able to lay approximately three thousand eggs...
June 8, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28597313/cellular-response-in-the-tick-feeding-site-in-crossbred-cattle-artificially-infested-by-rhipicephalus-microplus
#6
Jair Rodini Engracia Filho, Chiara Domingues Araújo, Gabriela Nishihara Pinto, Yann Henrique Mendes, Gervasio Henrique Bechara
Ticks and tick-borne diseases are of global importance and can cause serious economic losses to cattle-raising businesses. However, only few attempts have been made to describe the relationships between various cellular immune components and tick counts of, and therefore resistance to, Rhipicephalus microplus. The present study evaluated the late inflammatory cellular response and dermal dendritic cells at the attachment site in naturally presensitized bovines, artificially infested by R. microplus ticks. Twenty-two crossbred (Holstein × Gir) male experimental cattle were artificially infested with approximately 10,000 larvae of R...
June 8, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28593481/molecular-survey-of-coxiella-burnetii-in-wildlife-and-ticks-at-wildlife-livestock-interfaces-in-kenya
#7
David Ndeereh, Gerald Muchemi, Andrew Thaiyah, Moses Otiende, Samer Angelone-Alasaad, Michael J Jowers
Coxiella burnetii is the causative agent of Q fever, a zoonotic disease of public health importance. The role of wildlife and their ticks in the epidemiology of C. burnetii in Kenya is unknown. This study analysed the occurrence and prevalence of the pathogen in wildlife and their ticks at two unique wildlife-livestock interfaces of Laikipia and Maasai Mara National Reserve (MMNR) with the aim to determine the potential risk of transmission to livestock and humans. Blood from 79 and 73 animals in Laikipia and MMNR, respectively, and 756 and 95 ixodid ticks in each of the areas, respectively, was analysed...
June 7, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28593480/difference-in-susceptibility-of-small-rodent-host-species-to-infestation-by-ixodes-ricinus-larvae
#8
László Egyed
In a laboratory experiment (repeated eight times) individuals of six small rodent species were mixed with 500 Ixodes ricinus larvae for 24 h, than over a 3-day-long observation period engorged ticks fallen from individually kept rodents were counted. Forty engorged larvae fell from the hosts, 25% from striped field mice, 32.5% from house mice, 22.5% from common voles, 10% from bank voles, while wood mouse and steppe mouse proved to be almost free of successfully infesting ticks (both 5%). Statistical analysis indicated, that tick burden differed significantly among host species...
June 7, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28589297/sulfate-turpentine-a-resource-of-tick-repellent-compounds
#9
Fredrik Schubert, Katinka Pålsson, Ellen Santangelo, Anna-Karin Borg-Karlson
Compounds with tick (Ixodes ricinus) repellent properties were isolated from sulfate turpentine consisting of Norway spruce (80%) and Scots pine (20%) from southern Sweden. The turpentine was divided into two fractions by distillation under reduced pressure resulting in one monoterpene hydrocarbon fraction and a residual containing higher boiling terpenoids. The monoterpene fraction was further oxidized with SeO2 to obtain oxygenated monoterpenes with potential tick repellent properties. The oxidized fraction and the high boiling distillation residual were each separated by medium pressure liquid chromatography...
June 6, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28573423/first-report-of-spinose-ear-tick-otobius-megnini-acari-argasidae-in-sweden
#10
Anders Lindström, Johanna Lindström
A dog that had travelled to Sweden was inspected by a veterinarian. In one ear canal a tick was found. It was later identified as a spinose ear tick, Otobius megnini. In this case report we also review the previously known reports of O. megnini in Europe and the recent introduction and spread in Turkey.
June 1, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497304/acaricidal-activity-of-havardia-albicans-and-caesalpinia-gaumeri-methanolic-leaf-extracts-on-rhipicephalus-microplus-and-its-toxicity-to-laboratory-animals
#11
José A Rosado-Aguilar, Roger I Rodríguez-Vivas, Rocío Borges-Argaez, Karen A Arjona-Cambranes
The acaricidal activity of methanolic extracts from the leaves of Havardia albicans (Kunth Britton and Rose) and Caesalpinia gaumeri (Greenm) were tested on the larvae and adults of the cattle tick Rhipicephalus microplus Canestrini using the larval immersion test and the adult immersion test, respectively. The toxicity of these extracts was also evaluated on laboratory animals using toxicity bioassays at different concentrations: skin irritability (500 mg/ml), acute oral toxicity (5000 mg/kg), ocular irritability (1000 mg/ml) and dermal toxicity (5000 mg/kg)...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28497303/review-of-cattle-ticks-acari-ixodida-in-ivory-coast-and-geographic-distribution-of-rhipicephalus-boophilus-microplus-an-emerging-tick-in-west-africa
#12
O M Boka, L Achi, H Adakal, A Azokou, P Yao, Y G Yapi, M Kone, K Dagnogo, Y Y Kaboret
The exotic tick Rhipicephalus (Boophilus) microplus was discovered in Ivory Coast in 2007 and then gradually in other countries in West Africa. It is known to induce significant losses in farming and to replace other species of the same genus. In order to contribute to improve health and productivity of cattle in Ivory Coast regarding the emergence of this dreaded tick, a study was conducted to determine the current geographic distribution of the tick R. (B.) microplus and review cattle ticks in general. To this end, 23,460 ticks were collected from 180 farms located throughout the country...
May 11, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28493036/life-cycle-of-amblyomma-oblongoguttatum-acari-ixodidae-under-laboratory-conditions
#13
Thiago F Martins, Hermes R Luz, João Luiz H Faccini, Marcelo B Labruna
This study evaluated for the first time the life cycle of Amblyomma oblongoguttatum in the laboratory. For this purpose, larvae and nymphs were exposed to Gallus gallus (chicks), Rattus norvegicus (wistar rat), Calomys callosus (vesper mouse), Oryctolagus cuniculus (domestic rabbit), Cavia porcellus (guinea pig), and Didelphis albiventris (white-eared opossum). Nymphs were exposed to G. gallus, C. callosus, C. porcellus, O. cuniculus, R. norvegicus, and Nectomys squamipes (water rat). Adult ticks were exposed to domestic dogs...
May 10, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28634718/mite-communities-acari-mesostigmata-in-young-and-mature-coniferous-forests-after-surface-wildfire
#14
Jacek Kamczyc, Cezary Urbanowski, Emilia Pers-Kamczyc
Density, diversity and assemblage structure of Mesostigmata (cohorts Gamasina and Uropodina) were investigated in Scots pine forests differing in forest age (young: 9-40 years and mature: 83-101 years) in which wildfire occurred. This animal group belongs to the dominant acarine predators playing a crucial role in soil food webs and being important as biological control agents. In total, six forests (three within young and three within mature stands) were inspected in Puszcza Knyszyńska Forest Complex in May 2015...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28634717/morphological-diversification-among-island-populations-of-intertidal-mites-acari-oribatida-fortuyniidae-from-the-gal%C3%A3-pagos-archipelago
#15
Tobias Pfingstl, Julia Baumann
The intertidal oribatid mite species Alismobates galapagoensis and Litoribates caelestis occur on the archipelago of Galápagos. To test for morphological variation between populations of different islands, a comprehensive morphometric study was performed. Four A. galapagoensis populations from the islands Bartolomé, Isabela, Santa Cruz and San Cristobal, as well as two L. caelestis populations from Bartolomé and Santa Cruz were investigated. The L. caelestis populations did not show any significant differences whereas the A...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28573422/how-to-evaluate-the-potential-occurrence-of-intraguild-predation
#16
Morgana Maria Fonseca, Marta Montserrat, Celeste Guzmán, Inmaculada Torres-Campos, Angelo Pallini, Arne Janssen
Intraguild predation is the combination of exploitative competition and predation among potential competitors that use similar resources. It has the potential to shape population dynamics and community structure. Although there is much empirical evidence for the occurrence of intraguild predation in natural ecosystems, the study of its effects is mainly limited to short-term microcosm experiments. There is, therefore, certain skepticism about its actual significance in nature. A relevant concern is that there is no consensus regarding criteria to evaluate the possible occurrence of intraguild predation in short-term experiments, and methodological differences may therefore underlie apparent inconsistencies among studies...
June 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28540472/modelling-malpighian-tubule-crystals-within-the-predatory-soil-mite-pergamasus-longicornis-mesostigmata-parasitidae
#17
Clive E Bowman
The occurrence of refractive crystals (aka guanine) is characterised in the Malpighian tubules of the free-living predatory parasitiform soil mite Pergamasus longicornis (Berlese) from a temporal series of histological sections during and after feeding on larval dipteran prey. The tubular system behaves as a single uniform entity during digestion. Malpighian mechanisms are not the 'concentrative' mechanism sought for the early stasis in gut size during the second later phase of prey feeding. Nor are Malpighian changes associated with the time of 'anal dabbing' during feeding...
May 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28540471/genetic-characterization-of-the-honeybee-ectoparasitic-mite-varroa-destructor-from-benin-west-africa-using-mitochondrial-and-microsatellite-markers
#18
Aude E Kelomey, Armand Paraiso, Haziz Sina, Hélène Legout, Lionel Garnery, Lamine Baba-Moussa
Varroa destructor is one of the scourges of global beekeeping. It was detected for the first time in Benin in 2011 on the honeybee Apis mellifera adansonii. The aim of this study was to identify the strain of Varroa sp. found and study its genetic diversity. In total 183 Varroa mites were sampled in 21 municipalities in Benin. The COI intergenic region of each mite mtDNA was amplified by PCR. The SacI restriction enzyme was used to determine the strains of Varroa sp. Only the Korean (K) haplotype, identical to the most prevalent strain in Africa, was detected...
May 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28536802/molecular-investigations-of-the-bat-tick-argas-vespertilionis-ixodida-argasidae-and-babesia-vesperuginis-apicomplexa-piroplasmida-reflect-bat-connection-between-central-europe-and-central-asia
#19
Sándor Hornok, Krisztina Szőke, Tamás Görföl, Gábor Földvári, Vuong Tan Tu, Nóra Takács, Jenő Kontschán, Attila D Sándor, Péter Estók, Sara Epis, Sándor Boldogh, Dávid Kováts, Yuanzhi Wang
Argas vespertilionis is a geographically widespread haematophagous ectoparasite species of bats in the Old World, with a suspected role in the transmission of Babesia vesperuginis. The aims of the present study were (1) to molecularly screen A. vespertilionis larvae (collected in Europe, Africa and Asia) for the presence of piroplasms, and (2) to analyze mitochondrial markers of A. vespertilionis larvae from Central Asia (Xinjiang Province, Northwestern China) in a phylogeographical context. Out of the 193 DNA extracts from 321 A...
May 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/28526953/mutual-interference-between-adult-females-of-galendromus-flumenis-acari-phytoseiidae-feeding-on-eggs-of-banks-grass-mite-decreases-predation-efficiency-and-increases-emigration-rate
#20
Fatemeh Ganjisaffar, Gösta Nachman, Thomas M Perring
The Banks grass mite, Oligonychus pratensis (Banks) (Acari: Tetranychidae) causes significant damage to dates in California (USA), if not controlled. Studies are underway to develop biological control strategies against this pest in dates using the predatory mite Galendromus flumenis (Chant) (Acari: Phytoseiidae). In California date gardens, this predator is found in low numbers that are insufficient for the economic suppression of Banks grass mites, and our research aims to understand why it fails to keep up with prey densities...
May 2017: Experimental & Applied Acarology
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