bluuebunny/crossref_metadata_2025_split huggingface dataset:
A REVISION OF THE GENUS MACROPHYA DAHLBOM (HYMENOPTERA: SYMPHYTA, TENTHREDINIDAE) OF NORTH AMERICA
Authors: Gibson Gary A. P. 
Published: April 2011

AbstractThe species of the genus Macrophya Dahlbom (Tenthredininae) of North America are revised. Forty-six species and two subgenera are recognized, Macrophya s. str. with 45 species, and Pseudomacrophya Enslin with a single species. The subgenus Paramacrophya Forsius is newly synonymized with Macrophya s. str. Eleven species are described as new: amediata, epinolineata, macgillivrayi, masneri, masoni, mensa, nirvana, phylacida, senacca, serratalineata, and smithi; and the following new synonymy proposed: albomaculata (Norton) = contaminata Provancher, errans Rohwer, and fuscoterminata Rohwer; bifasciata (Say) = pulcherrima Kirby; cassandra Kirby = albilabris Harrington, bellula MacGillivray, and externiformis Rohwer; flavolineata (Norton) = confusa MacGillivray, crassicornis Provancher, (?) lineata Norton, and proximata Norton; flicta MacGillivray = fistula MacGillivray; fuliginea Norton = castanea Rohwer; fumator Norton = pumila Norton, and subviolacea Cresson; mixta MacGillivray = bilineata Dyar; nigra (Norton) = minuta MacGillivray; oregona Cresson = obaerata MacGillivray, and oregona var. dukiae Ross; pannosa (Say) = flaccida MacGillivray, and raui Rohwer; pulchella (Klug) = albifacies Kirby, dyari Rohwer, ornata MacGillivray, and trosula (Norton); pulchelliformis Rohwer = sambuci Rohwer; trisyllaba (Norton) = zonalis Norton; and varia (Norton) = fascialis Norton, and fascialis var. puella Ross. Macrophya varius var. festana Ross is removed from synonymy with M. varia (Norton) and accorded specific status, and the following species removed from previous synonymy and recognized as valid species: simillima Rohwer from intermedia (Norton); flavolineata (Norton), lineatana Rohwer, and zoe Kirby from pulchella (Klug); and oregona Cresson from pumila Norton. Macrophya dejecta (Norton) is removed from the list of Nearctic species, and is removed from synonymy with M. cinctula (Norton) but synonymized with the Palearctic species M. ligata (Müller). Macrophya annulipes Cresson and M. coquilletti (Rohwer) are considered to belong to an undescribed genus and are excluded from Macrophya; and Allantus cestus Say, and the fossiliferous species Macrophya pervetusta Brues, are considered as unrecognized taxa of Tenthredinidae. Neotypes are designated for Allantus intermedius Norton and A. epinotus Say, and lectotypes designated where necessary. The limits of the genus and subgenera are discussed, and the Palearctic and Nearctic faunas compared through species-groups. Keys to the males and females are given, all species described, and the taxonomic characters used to separate the Nearctic species illustrated in figures taken by electron photography and microphotography.
REVISION DES TRICHOPTèRES CANADIENS: I. La famille des Rhyacophilidae (Annulipalpia)
Authors: Schmid F. 
Published: April 2011

RésuméCe mémoire est le deuxième d'une série consacrée à la faune des Trichoptères du Canada et des Etats adjacents. Il traite de la famille des Rhyacophilides qui, chez nous, n'est représentée que par le genre Rhyacophila. Les deux sexes de toutes nos espèces indigènes sont décrits et figurés. Des tables dichotomiques adéquates permettront la détermination. Des cartes montrent les répartitions géographiques. Les caractères écologiques des espèces sont mentionnés, chaque fois que cela s'est révélé possible.
MODELLING OF GROWTH AND DEVELOPMENT OF CEREAL CROPS FOR RESOURCE MANAGEMENT
Authors: Jones Richard W. 
Published: April 2011

AbstractIn their simplest form, crop models consist of regressions relating factors such as yield to environmental variables. Explanatory models also exist, with much physiological detail and responsiveness to meteorological and soil factors. Summary models can be derived from such large models, including the influence of pests. Of these major types of models, regression models are increasingly becoming widely used to optimize and integrate the many facets of cereal management in Western Europe. This fact suggests that crop manipulation is evolving toward optimal production management.
GEOGRAPHIC AFFINITIES OF THE NORTH AMERICAN MECOPTERA
Authors: Byers George W. 
Published: April 2011

AbstractMecoptera of the Nearctic Region are, in general, more like those of the eastern Palaearctic than of any other faunal region. But the fossil record shows that our major extant genera have been in the northern continents since Early Cenozoic. Panorpidae and Panorpodidae probably entered North America by way of Beringia in the Eocene or Oligocene. Nearctic Bittacidae probably came from the Neotropical Region, but a few exhibit peculiar affinities with some eastern Asiatic species, suggesting migration out of the Nearctic into the Palaearctic. Boreidae appear to have been of North American origin but are now Holarctic; they are unknown as fossils. The Meropeidae were probably widespread in mid–Mesozoic but now are found only in eastern North America and western Australia.
LATE QUATERNARY HISTORY OF THE NORTHERN BEETLE FAUNA OF NORTH AMERICA: A SYNTHESIS OF FOSSIL AND DISTRIBUTIONAL EVIDENCE
Authors: Schwert Donald P. , Ashworth Allan C. 
Published: April 2011

AbstractFossils from sites of Late Quaternary age in North America provide tangible evidence of temporal changes in the character of the northern beetle fauna. Based on a synthesis of the fossil data with analyses of the present distributions for northern species, a rudimentary model is proposed to explain the recent history of the fauna of the arctic and the boreal forest.An open-ground beetle fauna of arctic–subarctic affinities had become established along the southern margin of the Laurentide ice sheet in the midcontinent by 20 500 years before present (yr B.P.). Climatic warming decimated this fauna throughout lowland areas at some time between 16 700 and 15 300 yr B.P.; small populations of some arctic–subarctic species, however, survived within either alpine habitats of the Cordillera and Appalachians or specialized environments associated with stagnant ice.Populations of the same arctic–subarctic beetle species existed within the ice-free Alaska–Yukon refugium throughout the late Wisconsinan. During the Holocene, this region served as the principal centre-of-origin for the dispersal of the arctic–subarctic beetle fauna.The beetle fauna of the boreal forest was also displaced southward by Late Wisconsinan glaciation. By 15 300 yr B.P., however, this fauna had largely replaced the arctic–subarctic beetle fauna along the ice margin of the midcontinent. Evidence provided by fossils from a series of sites demonstrates that beetle species of the boreal forest dispersed northward into Canada as the ice front receded.
WEATHER AND THE ECOLOGY OF APANTELES FUMIFERANAE VIER. (HYMENOPTERA: BRACONIDAE)
Authors: Nealis Vincent G. 
Published: April 2011

AbstractThe effects of weather on the spruce budworm parasitoid, Apanteles fumiferanae Vier., are examined. A phenological model based on temperature-dependent rates of development and longevity is developed and validated with field data. The model is then used to explore the effects of age-specific mortality on phenological behaviour of the parasitoid and the seasonal synchrony between the parasitoid and its host over several years. The results show that the parasitoid adult ecloses well before the host reaches an age susceptible to parasitism but that the egg maturation period and the longevity of the parasitoid diminish the consequences of the apparent asynchrony. The historical data reveal that the relative phenological characteristics of A. fumiferanae and its host vary little from year to year. In the second part of the study, temperature is shown to have a strong effect on adult parasitoid activity and on the rate of oviposition.
RELATIONSHIP BETWEEN STICKY TRAP CATCHES AND EMERGENCE OF PHOLETESOR ORNIGIS (WEED) (HYMENOPTERA: BRACONIDAE), A PARASITE OF THE SPOTTED TENTIFORM LEAFMINER, PHYLLONORYCTER BLANCARDELLA (F.) (LEPIDOPTERA: GRACILLARIIDAE)
Authors: Trimble R.M. 
Published: April 2011

AbstractThe relationship between yellow sticky trap catches of Pholetesor (= Apanteles) ornigis (Weed) and its emergence during the first two of its three yearly emergence periods was examined using four trap locations in five commercial apple orchards in Norfolk County, Ont., during 1984 and 1985. Orchards were divided into two zones: the border row of trees (= peripheral zone) and all trees within the border row (= interior zone). Traps were positioned within and below the tree canopy in the two zones.The sensitivity of the yellow traps to first male and female spring emergence was similar. Trap location had no obvious effect on the relationship between first spring emergence and first spring trap catch of males and females. The traps were similar in sensitivity to peak male and female spring emergence. Trap location affected the relationship between peak male emergence and peak male trap catch during the spring emergence period; the number of parasites caught on traps placed below the tree in the interior zone was the best indicator of peak male emergence. Trap location did not affect the relationship between peak female emergence and peak female trap catch during the spring emergence period.The yellow traps were more sensitive to male than to female first emergence during the first summer emergence period. During this emergence period, trap location had no obvious effect on the relationship between first emergence and first trap catch of males and females. The traps were more sensitive to peak male than to peak female emergence during the first summer emergence period. The number of male parasites caught on traps placed within the tree in the peripheral zone gave the best indication of peak male emergence during the first summer emergence period. The most accurate indication of peak female emergence was given by the number of female parasites caught on traps placed within or below the tree in the interior zone of the orchard.During the spring emergence period, few parasites were caught after emergence was complete, whereas during the first summer emergence period, relatively large numbers of parasites were sometimes caught up to 2 weeks after emergence was complete.The application of the results for monitoring P. ornigis emergence is discussed.
EVIDENCE OF SYNCHRONIZED CYCLES IN OUTBREAK PATTERNS OF DOUGLAS-FIR TUSSOCK MOTH, ORGYIA PSEUDOTSUGATA (McDUNNOUGH) (LEPIDOPTERA: LYMANTRIIDAE)
Authors: Shepherd Roy F. , Bennett Dayle D. , Dale John W. , Tunnock Scott , Dolph Robert E. , Thier Ralph W. 
Published: April 2011

AbstractOutbreak patterns of Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), over western North America historically appear to be synchronous, particularly in British Columbia, Washington, Oregon, and northern Idaho. Populations of the insect increase to outbreak and collapse in a variable cycle, averaging 9 years between peaks. A review of all outbreaks suggests repeated, widespread, nucleopolyhedrosis viral epizootics are responsible for the collapse of the population and, hence, the cycle. The virus appears to survive in the soil between outbreaks and to be carried incidentally to foliage where it is occasionally consumed by larvae. Ingestion of a single particle is probably sufficient to cause infection. Populations of the moth increase until density reaches the point where larvae to larvae infection is established. The viral inoculum builds rapidly following that point and spreads widely so that distant populations at all densities become infected, and collapse in the same year. The epizootic continues for another year. Then foliage contamination disappears, and populations reach their lowest densities before starting the cycle again.
PHOTOTOXINS AS INSECTICIDES AND NATURAL PLANT DEFENCES
Authors: Fields Paul G. , Arnason John T. , Philogène Bernard J.R. , Aucoin Richard R. , Morand Peter , Soucy-Breau Chantal 
Published: April 2011

AbstractThe thiophenes alpha-terthienyl and methyl-alpha-terthienyl are found in many species of the family Asteraceae and are highly phototoxic to mosquito larvae. These compounds and a synthetic analogue, cyano-alpha-terthienyl, controlled Aedes intrudens Dyar (Diptera: Culicidae) larvae at application rates between 10 and 40 g per hectare in field trials. These concentrations are similar to those currently used with chemical control agents. Piperonyl butoxide, a synergist used with pyrethrin, greatly increased the mortality of mosquito larvae at low application rates of the most potent phototoxin, cyano-alpha-terthienyl.Although we have demonstrated previously that these phototoxic defences are effective against some phytophagous insects, more recently we studied insects that are able to feed on a phototoxic plant, in order to examine modes of resistance to phototoxins. Chrysolina spp. (Coleoptera: Chrysomelidae) larvae are susceptible to phototoxicity but avoid it by feeding on Hypericum perforatum L. (Hypericaceae) at dawn and by hiding during the day. Chrysolina adults avoid phototoxicity by the presence of opaque cuticles that block the sunlight. First-instar larvae of Anaitis plagiata (L.) (Lepidoptera: Geometridae) avoid feeding on the glands that contain the phototoxin. Later-instar larvae feed on the entire leaf, yet are not susceptible to phototoxicity, indicating they have biochemical defenses against photo-induced damage.
SYSTEMATICS AND THE SYNECOLOGY OF AQUATIC INSECTS: PHENOLOGY AND TEMPORAL STRUCTURE OF TEMPERATE LAKE ASSEMBLAGES
Authors: Harper P.P. , Cloutier Louise 
Published: April 2011

AbstractFour emergence series were collected from a small mesotrophic–dystrophic lake in the southern Laurentians of Québec: near shore (station A, 0.3 m, shrubs and heaths), in the littoral zone (B, 0.6 m, and C, 1 m, aquatic vegetation), and in open water (D, 6 m, no vegetation). A gradient of species richness (121–34), of numbers (4622–1120/m2), of diversity (5.62–2.42 bits), and of equitability (0.81–0.48) extended from the shore to the open water. Also recognized was a seasonal succession of early synchronized species, many of which completed a second generation by late summer, and of more dispersed summer species. This pattern was best exemplified in the shore station, whereas in deeper sites, the assemblages were increasingly less structured and dominated by fewer species. Chaoborus punctipennis, a benthic insect feeding in the water column at night, tended to predominate in the outer stations and to impose its particular seasonal dynamics on the assemblage there. Chronological clustering revealed distinctive early- and late-season assemblages in all sites. A succession of distinct and temporally structured mid-season assemblages was evident at the shore station, but this pattern was obscured in other stations because of the recurrence and dominance of the same species throughout. Though these particular patterns may be restricted to the one lake studied, this approach based on a taxonomical and temporal analysis offers promise for generalizations once it has been applied to a variety of lake systems.
BOG ARACHNIDS (ARANEAE, OPILIONES) FROM MANITOBA TAIGA
Authors: Aitchison-Benell C.W. 
Published: April 2011

AbstractTaiga bog arachnids, mainly collected in pitfall or pan traps, are compared for two Manitoba regions, one southern and one northern. The dominant spider families in the south are Lycosidae, Clubionidae, and Erigonidae, whereas in the north they are Erigonidae, Lycosidae, Linyphiidae, and Gnaphosidae. The southern taiga bog has 82 species, the northern taiga, 39 species, with 16 species common to both regions. Two opilionid species were collected in the south and none in the north.
GROUND-LIVING SPIDERS, OPILIONIDS, AND PSEUDOSCORPIONS OF PEATLANDS IN QUEBEC
Authors: Koponen Seppo 
Published: April 2011

AbstractPeatlands were studied in temperate, boreal, subarctic, and arctic wetland regions of Quebec, mainly using pitfall traps. Altogether, 169 species of spiders, belonging to 14 families, were collected; 73 species were found only in the temperate-boreal region, 58 only in the subarctic-arctic region, and 38 in both regions. The most species-rich spider families were Linyphiidae (58.3% of all species), Lycosidae (12.4%), and Gnaphosidae (7.1%). Families occurring only, or mainly, in the temperate (and boreal) region were Hahniidae, Dictynidae, Salticidae, Liocranidae, and Theridiidae. Linyphiidae, especially Erigoninae, were typical of the subarctic region. Alopecosa aculeata (Clerck) and Pardosa hyperborea (Thorell) (Lycosidae), Theonoe stridula Crosby (Theridiidae), and Ceratinella brunnea Emerton (Linyphiidae) were found in six of the seven study areas. Seven of the eight opilionid species were found in the temperate region, but Mitopus morio (Fabricius) occurred only in the subarctic bogs. The only pseudoscorpion, Microbisium brunneum (Hagen), was caught in the temperate, boreal, and subarctic regions. The percentage of spiders collected in bogs of both Quebec and southern Ontario was 64% in the temperate region and only 27% in the subarctic region. Almost 50% of species from bogs in the Manitoba taiga were found also in Quebec. About a third of the Quebec bog spiders are Holarctic.
CHANGES IN THE TERRESTRIAL SPIDER FAUNA (ARACHNIDA: ARANEAE) OF A NORTH GERMAN RAISED BOG DISTURBED BY HUMAN INFLUENCE. 1964–1965 AND 1986–1987: A COMPARISON
Authors: Schikora Hans-Bert 
Published: April 2011

AbstractThe terrestrial spider fauna of a North German bog relict, initially examined in a pitfall trap study in 1964–1965, was the subject of a similar examination 22 years later. Between the investigations the bog, which was still in a quite pristine state, had considerably changed its ecological character due to progressive draining. Sixty-eight spider species were collected. Many of them are characteristic for bogs, but none can be regarded as bog-specific. On a general species level no clear clues about consequences of biotope changes could be ascertained; 81% of the former species were found again.The most informative data are provided by species composition and abundance of the more prevalent spider species. In 1964–1965 the spider fauna was clearly dominated by photophilous species, many of them additionally preferring wet or moist biotopes. Twenty-two years later the proportion of photophilous species had decreased in favour of more skotophilous species.The scale of changes in biotope characters is regarded as the most probable explanation for this phenomenon, especially the increase of "shrubbiness" in vegetation and the nearly total loss of peatmosses. The spider Antistea elegans (Blw.), Hahniidae, is discussed as a possible indicator species for monitoring hydrological changes in bog biotopes.
THE IMPORTANCE OF HABITAT STRUCTURE AND FOOD SUPPLY FOR CARABID BEETLES (COLEOPTERA, CARABIDAE) IN PEAT BOGS
Authors: Främbs Herbert 
Published: April 2011

AbstractDuring the period 1985–1989, the carabid assemblages of a raised peat bog in eastern central Sweden and of six peatlands in New York State and Maine were studied. The principal methods of investigation were pitfall trapping in summer, and quadrat sampling in winter. In addition to carabids, potential food organisms were evaluated from the pitfall catches.The bogs, although of different types and located on different continents, show similar physiognomic vegetation units. Eight of these units are considered relevant as carabid microhabitats. The carabid assemblages of open sunny, and wooded shaded habitats are clearly distinguished. Only a few species are adapted to the extreme environment of openSphagnumL. habitats. Among them, stenotopic species are dominant. The seasonal distribution of two species on Swedish Ryggmossen [Agonum ericeti(Panzer),Pterostichus rhaeticusHeer] suggests that the carabids of open bog plateau habitats use dampSphagnumlawns for their summer activities and migrate to drier hummocks for overwintering.On bog plateaus, larger populations of ground beetles were only found where a pronounced pattern of hummocks and hollows exists. In bogs with a prevailing uniform vegetation ofSphagnummats, carabids were conspicuously scarce. Thus, the development of a bog indigenous carabid fauna is closely related to the presence of a hummock–hollow mosaic. The data indicate that in most bog habitats food is not a limited resource and does not play a key role as a population controlling factor.
RELATIVE EFFICIENCIES OF WET AND DRY EXTRACTION TECHNIQUES FOR SAMPLING AQUATIC MACROINVERTEBRATES IN A SUBARCTIC PEATLAND
Authors: McElligott Paul E.K. , Lewis David J. 
Published: April 2011

AbstractTwo behavioural extraction techniques, wet and dry extraction, were evaluated as to their relative efficiencies in removing invertebrates from samples of wet peat collected from a fen near Schefferville, Quebec. Dry extraction involved drying a substrate sample from above, forcing any macroinvertebrates contained therein to move downward out of the substrate matrix. In wet extraction, peat samples were suspended in a water bath where a vertical temperature-dissolved oxygen gradient had been established; invertebrates responded to the gradient by moving downward out of the sample and into the water bath. Wet extraction yielded approximately three times more invertebrates per unit volume of substrate than dry extraction, but the two extraction methods differed considerably in their ability to extract different invertebrate taxa. Dry extraction was more effective than wet for obtaining larvae of Tabanidae, Tipulidae, Empididae, and Dolichopodidae, but larval Chironomidae, sphaeriid clams, and oligochaete worms were collected more efficiently by wet extraction. Other invertebrate taxa were collected with approximately equal efficiency by both methods.
STRATEGIES FOR THE USE OF ENTOMOPATHOGENS IN THE CONTROL OF THE DESERT LOCUST AND OTHER ACRIDOID PESTS
Authors: Prior C. , Streett D.A. 
Published: April 2011

AbstractLarge-scale applications of non-persistent but broad-spectrum chemical insecticides in Africa during the 1980s for control of acridoid pests, particularly the desert locust (Schistocerca gregaria Forskål) and Sahelian pest grasshoppers, raised concern about environmental damage and human safety. Similar concerns have been expressed in Australia, the United States, and Canada and have led to a search for alternative strategies. To lessen dependence on chemicals, an integrated pest management (IPM) approach for grasshopper control has been encouraged in the United States with emphasis on biological control as an important component and this is also desirable elsewhere, but additional biocontrol components are needed. Current strategies for most pest acridoids rely on short-term destruction of outbreak populations. Nymphs are the preferred target wherever possible and inundative augmentation of entomopathogenic deuteromycete fungi formulated as biopesticides could replace chemical spraying in some cases, especially where the major threat is to crops remote from the pest breeding areas. Entomopathogens are slower acting than chemicals and thus best suited for use where the pest is not immediately threatening to crops. Schistocerca gregaria and Oedaleus senegalensis Krauss pose particularly difficult problems because of the very large area and inaccessibility of their potential breeding grounds, their very sudden upsurges, and their great mobility as adult swarms. Fast-acting chemicals are likely to be needed when rapid intervention is required to control these pests, but an IPM strategy could incorporate biopesticide application in the early stages of upsurges and also be used for swarm control in some cases. However, improved prediction and monitoring are needed to facilitate the use of biopesticides and other IPM techniques against these pests.