The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Daniel J. Leprince - One of the best experts on this subject based on the ideXlab platform.
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parity stage of follicular development and sperm presence in hemiarctic host seeking Hybomitra populations diptera tabanidae
Journal of Medical Entomology, 1990Co-Authors: Daniel J. Leprince, Alain MaireAbstract:Parity, stage of follicular development, and sperm presence were monitored in six host-seeking Hybomitra species from the Gulf of Richmond (56°20′N, 75°80′W) along the eastern coast of Hudson Bay in northern Quebec in 1983. Parous flies represented 40, 31, 92, and 20% of H. aequetincta, H. arpadi, H. lurida , and H. zonalis populations, respectively. Only parous flies were found in H. frontalis and H. hearlei populations. Anautogeny in H. aequetincta and H. zonalis populations, and autogeny in the H. hearlei population, are reported for the first time. Sperm was detected in 84% of the flies; 63% had terminal follicles at stage II ( n = 711). Sperm prevalence was higher in parous than in nulliparous flies of anautogenous species.
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gonotrophic status follicular development sperm presence and sugar feeding patterns in a Hybomitra lasiophthalma population diptera tabanidae
Journal of Medical Entomology, 1990Co-Authors: Daniel J. Leprince, M BigraspoulinAbstract:Parity, stage of follicular development, and presence of sperm and fructose or sucrose were monitored during two consecutive years in a population of Hybomitra lasiophthalma (Macquart). Females were collected in canopy traps with or without carbon dioxide. The trap catch increased four times with carbon dioxide (CO2). Presence or absence of CO2 had no significant effect on parity rates, prevalence of sperm and fructose, and the stage of primary follicular development within nulliparous (nullipars) and parous flies (pars). The percentage of parous flies was 38% (n = 306) in 1980 and 20% (n = 818) in 1981. The presence of 93% host-seeking nullipars with terminal follicles at stage II suggested that the population studied in southwestern Quebec was anautogenous. Sperm was found in 83% and fructose in 84% of specimens dissected (n = 1,124); sperm presence was significantly higher in pars (89%) than in nullipars (81%).
M Bigraspoulin - One of the best experts on this subject based on the ideXlab platform.
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gonotrophic status follicular development sperm presence and sugar feeding patterns in a Hybomitra lasiophthalma population diptera tabanidae
Journal of Medical Entomology, 1990Co-Authors: Daniel J. Leprince, M BigraspoulinAbstract:Parity, stage of follicular development, and presence of sperm and fructose or sucrose were monitored during two consecutive years in a population of Hybomitra lasiophthalma (Macquart). Females were collected in canopy traps with or without carbon dioxide. The trap catch increased four times with carbon dioxide (CO2). Presence or absence of CO2 had no significant effect on parity rates, prevalence of sperm and fructose, and the stage of primary follicular development within nulliparous (nullipars) and parous flies (pars). The percentage of parous flies was 38% (n = 306) in 1980 and 20% (n = 818) in 1981. The presence of 93% host-seeking nullipars with terminal follicles at stage II suggested that the population studied in southwestern Quebec was anautogenous. Sperm was found in 83% and fructose in 84% of specimens dissected (n = 1,124); sperm presence was significantly higher in pars (89%) than in nullipars (81%).
Alain Maire - One of the best experts on this subject based on the ideXlab platform.
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parity stage of follicular development and sperm presence in hemiarctic host seeking Hybomitra populations diptera tabanidae
Journal of Medical Entomology, 1990Co-Authors: Daniel J. Leprince, Alain MaireAbstract:Parity, stage of follicular development, and sperm presence were monitored in six host-seeking Hybomitra species from the Gulf of Richmond (56°20′N, 75°80′W) along the eastern coast of Hudson Bay in northern Quebec in 1983. Parous flies represented 40, 31, 92, and 20% of H. aequetincta, H. arpadi, H. lurida , and H. zonalis populations, respectively. Only parous flies were found in H. frontalis and H. hearlei populations. Anautogeny in H. aequetincta and H. zonalis populations, and autogeny in the H. hearlei population, are reported for the first time. Sperm was detected in 84% of the flies; 63% had terminal follicles at stage II ( n = 711). Sperm prevalence was higher in parous than in nulliparous flies of anautogenous species.
Arne C Nilssen - One of the best experts on this subject based on the ideXlab platform.
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effect of 1 octen 3 ol in field trapping aedes spp dipt culicidae and Hybomitra spp dipt tabanidae in subarctic norway
Journal of Applied Entomology, 1998Co-Authors: Arne C NilssenAbstract:: A field test with 1-octen-3-ol (octenol) used as an attractant in flight traps was carried out in subarctic Norway (69o40′N, 23o30′E) during four warm days in July 1993. Aedes spp. (Dipt., Culicidae) were caught in significantly (P = 0.0001) higher numbers in octenol-baited traps than in empty control traps (approximately seven-fold increase), as was Hybomitra lundbecki Lyneborg (Dipt., Tabanidae), (P = 0.0003) (approximately nine-fold increase). Octenol also increased but not significantly (P = 0.09, n = 14) the catch of Chrysops relictus Meigen (Dipt., Tabanidae). The study confirmed the established role of octenol as an attractant of biting Diptera. The advantage of using octenol instead of, or in combination with, carbon dioxide in control or surveillance of such insects is discussed.
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Effect of 1‐octen‐3‐ol in field trapping Aedes spp. (Dipt., Culicidae) and Hybomitra spp. (Dipt., Tabanidae) in subarctic Norway
Journal of Applied Entomology, 1998Co-Authors: Arne C NilssenAbstract:: A field test with 1-octen-3-ol (octenol) used as an attractant in flight traps was carried out in subarctic Norway (69o40′N, 23o30′E) during four warm days in July 1993. Aedes spp. (Dipt., Culicidae) were caught in significantly (P = 0.0001) higher numbers in octenol-baited traps than in empty control traps (approximately seven-fold increase), as was Hybomitra lundbecki Lyneborg (Dipt., Tabanidae), (P = 0.0003) (approximately nine-fold increase). Octenol also increased but not significantly (P = 0.09, n = 14) the catch of Chrysops relictus Meigen (Dipt., Tabanidae). The study confirmed the established role of octenol as an attractant of biting Diptera. The advantage of using octenol instead of, or in combination with, carbon dioxide in control or surveillance of such insects is discussed.
Paul E. K. Mcelligott - One of the best experts on this subject based on the ideXlab platform.
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Seasonal changes in abundance and gonotrophic age of host-seeking Tabanidae (Diptera) from a subarctic Labrador peatland.
Journal of Medical Entomology, 1998Co-Authors: Paul E. K. Mcelligott, David J. LewisAbstract:Canopy and Malaise traps continuously sampled host-seeking female tabanids throughout the 1990 and 1991 flight seasons at Iron Arm Fen in subarctic Labrador. A total of 19,426 tabanids representing 3 genera and 18 species was collected. Subsamples of each daily catch were dissected to determine gonotrophic age. Horse flies (mainly Hybomitra spp.) accounted for 96% of all tabanids; the remainder were deer flies ( Chrysops spp.). Hybomitra arpadi (Szilady) and Hybomitra aequetincta (Becker) were the dominant species, comprising 60.6 and 24.8% of collections, respectively. They were also among the 1st species to emerge (in early July) and persisted for the entire flight season (until mid-August). Seasonal abundance for each species varied between the 2 yr of study. Both H. arpadi and H. aequetincta were obligately anautogenous at Iron Arm Fen. Seasonal changes in the gonotrophic age structure of host-seeking females of these species indicated a mid-July emergence peak in 1990 and an early July peak in 1991. Among the other tabanid species collected at Iron Arm Fen, Hybomitra lurida (Fallen) and Hybomitra zonalis (Kirby) were facultatively autogenous, whereas Hybomitra pechumani (Teskey & Thomas), Hybomitra hearlei (Philip), Hybomitra frontalis (Walker), Hybomitra astuta (Osten Sacken), Chrysops zinzalus (Philip), and Chrysops nigripes Zetterstedt were obligately autogenous during their 1st ovarian cycle.
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Distribution and abundance of immature Tabanidae (Diptera) in a subarctic Labrador peatland
Canadian Journal of Zoology, 1996Co-Authors: Paul E. K. Mcelligott, David J. LewisAbstract:During the summers of 1990 and 1991, 406 larval tabanids were extracted from samples of peat collected at eight sites in a subarctic Labrador peatland. Although not all larvae could be identified to species, five deer fly (Chrysops spp.) and six horse fly species (five Hybomitra spp., one Atylotus sp.) were identified. Chrysops probably zinzalus and Chrysops nigripes were the dominant deer fly species and Hybomitra arpadi was the most commonly collected horse fly. Deer fly larvae accounted for 88% of specimens collected. Chrysops larvae were collected most frequently from sites where the water table was at or below the substrate surface, and were rarely observed at sites where the substrate was submerged. The opposite was true for horse fly larvae, which were commonest at sites where the substrate was submerged. The density of tabanid larvae in the peatland was 14.04/m2 in regions of the fen where the water table was 3–5 cm below the substrate surface, 23.20/m2 in regions where the water table was at or s...
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SEASONAL DISTRIBUTION AND PARITY OF HOST-SEEKING HORSE FLIES (DIPTERA: TABANIDAE) FROM A PASTURE NEAR SEVEN SISTERS, MANITOBA
Canadian Entomologist, 1991Co-Authors: Paul E. K. Mcelligott, Terry D. GallowayAbstract:Twenty species of Tabanidae in three genera [ Hybomitra (15 spp.), Tabanus (four spp.), Haematopota (one sp.)] were caught in Manitoba horse fly traps from mid-May to mid-July in 1987, and from mid-May to mid-August in 1988. Hybomitra lurida (Fallen) and H . nitidifrons nuda (McDunnough) peaked in abundance in late May to early June; H . illota (Osten Sacken) and H . lasiophthalma (Macquart) in early June; H . affinis (Kirby), H . arpadi (Szilady), and H . zonalis (Kirby) in mid-June; H . epistates (Osten Sacken) and H . pechumani Teskey and Thomas in late June to early July. Abundance of H . trepida (McDunnough) peaked twice, in late June and early August. Tabanid density and diversity were greatest during June; few flies were present at the site after mid-July. For most species, at the beginning of the flight season, 80–100% of flies dissected were nulliparous. After approximately 1 month of flight activity, parity in all but three species reached levels approaching 100%, and remained high thereafter. Hybomitra lurida and H . nitidifrons nuda were 100% parous within 2 weeks of their first appearance in traps. Parity of H . trepida increased to 100% after 4 weeks, declined to 40% 2 weeks later, and returned to 100% after another 2 weeks.
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daily activity patterns of horse flies diptera tabanidae Hybomitra spp in northern and southern manitoba
Canadian Entomologist, 1991Co-Authors: Paul E. K. Mcelligott, Terry D. GallowayAbstract:Daily patterns of host-seeking activity by female tabanids were determined by hourly trapping (0530–2230 hours) with Manitoba horse fly traps at Seven Sisters, Man., 4 days a week, throughout the summer of 1988. Hybomitra epistates (Osten Sacken) and H . pechumani Teskey and Thomas were most active during late morning or mid-day; H . arpadi (Szilady) and H . zonalis (Kirby) in early afternoon; H . affinis (Kirby), H . illota (O.S.), and H . lasiophthalma (Macquart) in late afternoon; H . nitidifrons nuda (McDunnough) and H . lurida (Fallen) in early evening. The morning onset of tabanid flight activity usually was related to temperature, but the cessation of activity in the evening was related either to temperature or light, depending on which was first to fall below threshold levels. Tabanid flight activity was generally low at temperatures below 20°C, although H . lasiophthalma and H . affinis occasionally were caught at 12°C. Little flight activity occurred at light intensity levels below 1000 lx regardless of temperature. At Churchill, Man., where tabanids were trapped hourly from 27 July to 15 August in 1988, H . affinis and H . frontalis (Walker) activity was low below 14°C, although some activity occurred at 6°C.
