Effects of discharge/substrate stability relationships on the abundance, diversity, and distribution aquatic insects were studied from 1986 to 1988 in three reaches a small stream Manitoba escarpment. Substrate (percentage streambed paving material at incipient motion) ranged 80 20% bankfull discharge. Eleven taxa mayflies, 15 caddisflies, 10 stoneflies collected. All but few present all stations. Benthic insect densities negatively correlated with increasing discharge substrate particle...

Seven species of the feather mite genus Trouessartia Canestrini, 1899 (Astigmata: Trouessartiidae) have been recorded on swallows and martins (Passeriformes: Hirundinidae) in Manitoba (Canada). Of them, five are described as new species: ampulicaudata sp. n. T. petrochelidon from American cliff swallow Petrochelidon pyrrhonota (Vieillot), bochkovi tree Tachycineta bicolor cryptocaudata progne purple martin Progne subis (Linnaeus). A group stelgidopteryx, incorporating living hirundinids...

Passive surveillance for the occurrence of tick Ixodes scapularis Say (1821) and their infection with Lyme borreliosis spirochaetes Borrelia burgdorferi s.l. has taken place in Canada since early 1990. Ticks have been submitted from members public, veterinarians, medical practitioners to provincial, federal, university laboratories identification, data collated B. detected at National Microbiology Laboratory. The locations collection 2,319 I. were mapped, we investigated potential risk...

Distributional ranges of the ticks Dermacentor andersoni Stiles and variabilis (Say) in Canadian Prairies were determined by passive surveillance active collection. These findings compared with historical records both species, particularly province Saskatchewan, where northern distributional limits tick species occur. Before 1960s, D. allopatric Saskatchewan; however, since then, distribution has expanded westward northward. Although range remained relatively stable, expansion resulted a...

Passive surveillance for the occurrence of tick Ixodes scapularis Say (1821) and their infection with Lyme borreliosis spirochaetes Borrelia burgdorferi s.l. has taken place in Canada since early 1990. Ticks have been submitted from members public, veterinarians, medical practitioners to provincial, federal, university laboratories identification, data collated B. detected at National Microbiology Laboratory. The locations collection 2,319 I. were mapped, we investigated potential risk...

Abstract Nearly all lineages of birds host parasitic feather lice. Based on recent phylogenomic studies, the three major modern diverged from each other before Cretaceous-Paleogene (K-Pg) mass extinction event. In contrast, studies phylogeny lice birds, indicate that these parasites diversified largely after this However, were unable to reconstruct ancestral avian lineage for Here we use genome sequences a broad diversity based 1,075 genes. By comparing louse evolutionary tree tree, show...

Abstract Three major lineages of mites (Arachnida: Acari) are parasitic in the nasal passages birds: Rhinonyssidae (Mesostigmata), Ereynetidae (Prostigmata), Cytoditidae, and Turbinoptidae (Astigmata). The most diverse group avian is Rhinonyssidae, which obligate endoparasites non-ratite birds worldwide. Prior to this study, there were only four published three unpublished records from Canada. In Alberta, 15% 450 (154 species) examined during 2003–2007 infested with mites; Manitoba, 16% 2447...

Investigation of the diversity and taxonomy feather mites subfamily Pterodectinae (Astigmata: Proctophyllodidae) on passerines (Passeriformes) kingfishers (Coraciiformes: Alcedinidae) in Manitoba revealed 19 species 5 genera. Of them, eight new are described, seven these from one a kingfisher: Alaudicola eremophila sp. n. Eremophila alpestris (Alaudidae), Amerodectes icteri Icterus galbula (Icteridae), A. pheucticus Pheucticus ludovicianus (Cardinalidae), tiffanyluiae Oporornis agilis...

Fleas were collected from Richardson's ground squirrels (Spermophilus richardsonii) livetrapped in two areas southern Manitoba. Our objectives to describe the seasonal activity of fleas and determine whether peaks mean infestation parameters for different species occurred at times year. We also wanted if Opisocrostis bruneri was presence other on same hosts. Activity both locations similar that observed previous studies Canada. bruneri, Oropsylla rupestris, Neopsylla inopina, Rhadinopsylla...

The life histories of Hexagenia limbata (Serville) and Ephemera simulans Walker were investigated in Dauphin Lake, a large (surface area 519.3 km²) but shallow (mean depth 2.1 m) prairie lake south-western Manitoba. Wing pad developmental stages helped to separate overlapping cohorts H. limbata. During the 2-yr study, seven this species distinguished, indicative three different history patterns. Four had which eggs hatched soon after oviposition. Another type pattern was evident...

Ephoron album was the dominant summer mayfly in shallow riffles agricultural zone of Valley River, Manitoba, 1982 and 1983. There one generation per year; eggs deposited August hatched late May following year nymphs developed rapidly during months. The required a cold period to promote hatching success treated laboratory at −2 °C for varying periods time positively correlated length exposure period. No 4 or 10 °C. Production estimated by four methods production interval only 72 days:...

Abstract Population parameters of ectoparasites on feral pigeons, Columba livia Gmelin (Aves: Columbiformes: Columbidae), were estimated from 1995–2012 in southern Manitoba, Canada. The are chewing lice (Phthiraptera): Philopteridae – Campanulotes compar (Burmeister), Columbicola columbae (Linnaeus), and Coloceras tovornikae Tendeiro; Menoponidae Hohorstiella lata (Piaget). We tested the hypotheses that both abundance population stability species-specific traits. Over 10 years, four species...

One thousand seven hundred unfed field-collected adult Dermacentor variabilis (Say) were overwintered in 34 outdoor enclosures near the northern limit of their distribution Manitoba, Canada. At limits range D. variabilis, it had always been assumed that ticks questing spring succumbed before next winter and not part population observed following year. Survival collected was assessed on two occasions. In midwinter, an average 39.4% (SE ± 2.50) still alive, while 19.9% 1.14) survived to April....

Abstract An extensive survey of chewing lice from rock pigeon, Columba livia Gmelin, and mourning dove, Zenaida macroura (L.), carried out 1994 to 2000 2003 2006 in Manitoba, Canada, produced the following new records: Coloceras tovornikae Tendeiro for North America; Columbicola macrourae (Wilson), Hohorstiella lata (Piaget), H . paladinella Hill Tuff, Physconelloides zenaidurae (McGregor) Canada; Bonomiella columbae Emerson, Campanulotes compar (Burmeister), baculoides (Paine), C. (L.)...

Abstract Anatoecus Cummings (Phthiraptera: Philopteridae) is a genus of chewing lice with four species infesting Anseriformes in North America: cygni (Denny), dentatus (Scopoli), icterodes (Nitzsch), and penicillatus Kéler. Males A. are distinguishable by their genitalia; however, there no known anatomical characteristics to distinguish females. recorded from at least 55 the same host worldwide. The mitochondrial gene cytochrome c oxidase subunit I was examined species, specifically examine...

Abstract Seasonal dynamics of louse (Phthiraptera) populations on feral pigeons, Columba livia Gmelin (Aves: Columbiformes: Columbidae) were investigated from 2003 to 2012 in southern Manitoba, Canada. Pigeons infested with: Philopteridae – Campanulotes compar (Burmeister), Columbicola columbae (Linnaeus), and Coloceras tovornikae Tendeiro; Menoponidae Hohorstiella lata (Piaget). We consider the hypothesis that four species living same host show similar seasonal dynamics, coordinated by life...

Abstract Four families of parasitic mites (Acari: Rhinonyssidae, Ereynetidae, Cytoditidae, and Turbinoptidae) have evolved independently to live inside the nasal passages birds. A previous survey in Canada drew attention dearth knowledge about these specialised mites, indicated there were more species discover Canada. Since 2008, we continued herein present details from infested hosts, 92 host individuals representing 64 11 orders 23 families. We report 18 new records for Canada: 16 one...

Abstract Five species of woodpeckers (Piciformes: Picidae) in Manitoba, Canada were examined for chewing lice (Phthiraptera: Amblycera and Ischnocera): downy woodpecker (DOWO) ( Picoides pubescens (Linnaeus), n =56), hairy (HAWO) villosus n= 32), pileated (PIWO) Dryocopus pileatus =12), northern flicker (NOFL) Colaptes auratus =223), yellow-bellied sapsucker (YBSA) Sphyrapicus varius =192). Seven collected (total number=40 613): Menacanthus pici (Denny) from all woodpeckers, Brueelia...

Abstract Four new species of feather mites are described from birds in Canada: Megniniella ratcliffi sp.nov . (Analgidae) and Metanalges holderi the Sora, Porzana carolina (Linnaeus) (Gruiformes: Rallidae): Metingrassia pelecani (Xolalgidae) American White Pelican, Pelecanus erythrorhynchos Gmelin (Pelecaniformes: Pelecanidae); Vingrassia cygni Tundra Swan, Cygnus columbianus (Ord) (Ànseriformes: Anatidae). The genus is reinstated its previous synonymy with Ingrassia based on presence an...

In 1983 and 1984 the impact of biting flies on behaviour pastured heifers was determined for two herds cattle in eastern Manitoba. One herd received a whole-body spray cypermethrin (0.1% active ingredient) per animal every 14 days other an untreated control herd. Horse (predominantly Hybomitra spp.) were most bothersome to heifers, with peak numbers mostly occurring between 11:00 15:00. mosquitoes (Aedes caused increase individual avoidance responses animals, including head tosses, foot...

Little is known about the distribution and prevalence of spotted fever group rickettsiae in Canada. We conducted active surveillance for tick-associated 10 localities Manitoba. A total 1044 adult American dog ticks, Dermacentor variabilis (Acari: Ixodidae), were collected screened rickettsiae. Rickettsia montanensis was only species rickettsia detected. The mean infection 9.8% (range, 0.00–21.74% among localities). proportion infected male female ticks not significantly different; however,...