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Results 601 - 650 of 1367
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Sumoski, S.E. - - 2009
Human-mediated disturbances have altered every ecosystem on the planet and these changes may have important consequences for biodiversity and community structure. We tested how the degree of urbanization impacts a tri-trophic interaction among the Florida scrub endemic plant Palafoxia feayi, a gallmaking midge, and the associated parasitoid wasps. A combination ...
Cave, Ronald - - 2009
Egg duration period, immature development time, and pre-oviposition period of the cycad aulacaspis scale, Aulacaspis yasumatsui Takagi, were measured at 9 constant temperatures in the laboratory. Egg duration period ranged from 15 d at 20[degrees]C to 7 d at 30[degrees]C. First instar development time was 30 d at 18[degrees]C but ...
Auad, A.M. - - 2009
The impact of temperature was evaluated on Rhopalosiphum padi (L.) (Hemiptera: Aphididae). Nymphs, 12-h-old, were placed individually in cylindrical plastic dishes (2.5 x 2.5 cm), with a layer of 1% agar in which leaf disks of signal grass had been placed. The nymphs were reared at 12, 16, 20, 24, ...
Maravalhas, Jonas - - 2009
Associations between ants and Hemiptera are common in the families Membracidae, Coccoidea and Aphidoidea, but there are only a few cases of ants using honeydew of Cicadellidae species. We surveyed plants of Roupala montana Aubl. (Proteaceae) in the cerrado area (savanna like vegetation) in the Federal District (Brazil) during the ...
Amin, Muhammad - - 2009
The predatory mite Phytoseiulus macropilis Banks (Acari: Phytoseiidae) is native to Florida. Some biology and ecology of this phytoseiid have been documented, but its potential as a biological control agent of phytophagous mites (Acari: Tetranychidae) has received less attention. The response of P. macropilis to 12 acaricides, 3 tetranychid mite ...
Malo, Edi - - 2009
We analyzed the volatiles emitted by Mexican populations of the female coffee leafminer moth Leucoptera coffeella that were collected in coffee plantations located in the Soconusco region of Chiapas. Our results confirmed previous results that L. coffeella females emitted 5,9-dimethylpentadecane as the major and 5,9-dimethylhexadecane as the minor component. Field ...
Cetintas, Ramazan - - 2009
Field and laboratory experiments were conducted to determine resistance of cotton Gossypium hirsutum L. cultivars differing in leaf morphology (shape and pubescence) to the B biotype of sweetpotato whitefly Bemisia tabaci (Gennadius) and impacts on its parasitoids. Five cotton cultivars were evaluated in a field-plot experiment at Hastings, Florida. The ...
Palenchar, Jessica - - 2009
We report here that it is possible to rear D. areolatus on irradiated A. suspensa larvae without adversely affecting sex ratio and overall parasitoid emergence and with no adult A. suspense emergence. There was no difference in emergence of D. areolatus adults from irradiated versus non-irradiated hosts (72.4 [+ or ...
Yao, Zonglu - - 2009
The furrow opening configuration used by no-till seeders can have a major effect on crop emergence in conservation tillage systems. This is particularly important in annual double-cropping regions (winter wheat and summer maize) of northern China where large volumes of residue remain on the soil surface after maize harvesting. This ...
Taylor, M.D. - - 2009
This paper assesses a potentially interesting soil process, dealumination, as the mechanism for the increase observed in strong acid recoverable Al and associated elements in farmed soils compared with background soils in the Waikato Region of New Zealand. Waikato Regional Council has been measuring an established set of 7 soil ...
Wang, Zhenying - - 2009
Measurement scale of soil water retention parameters is often different from the application scale. Knowledge of scaling property of soil hydraulic parameters is important because scaling allows information to be transferred from one scale to another. The objective of this study is to examine whether these parameters have fractal scaling ...
Triantafilis, J. - - 2009
The network of prior streams and palaeochannels common across the Riverine Plains of the Murray--Darling Basin act as conduits for the redistribution of water and soluble salts beneath the root-zone. To improve scientific understanding of these hydrological processes there is the need to better represent and map the connectivity and ...
Sanjari, Gholamreza - - 2009
The time-controlled rotational grazing (TC grazing) has become popular in Australia and elsewhere in the world to provide graziers and ranchers with improved productivity over traditional practices. However, this grazing system, which involves short periods of intensive grazing, has raised concerns about sustainability and environmental impacts on water and soil ...
Mamedov, A.I. - - 2009
Soil surface application of dissolved linear polyacrylamide (PAM) of high molecular weight (MW) can mitigate seal formation, runoff, and erosion, especially when added with a source of electrolytes (e.g. gypsum). Practical difficulties associated with PAM solution application prohibited commercial use of PAM in dryland farming. An alternative practice of spreading ...
Wilson, Brian - - 2009
There is a widespread and growing need for information relating to soil condition and changes in response to land management pressures. To provide the information needed to quantify land management effects on soil condition, monitoring systems are now being put in place and these programs will generate large numbers of ...
Clark, G.J. - - 2009
Subsoil constraints present a substantial problem for crop production in many agricultural regions. In particular, soils in temperate grain production areas of Australia are often poorly structured due to high content of sodic clay. An alternative to the standard practice of addition of gypsum is to incorporate organic amendments deep ...
Leon, Ai - - 2009
A shortage of data for percentage of organic carbon (C%) makes calculation of soil profile carbon storage difficult. Loss on ignition (LO1) data, which are cheap to obtain and often readily available, can be used to estimate organic C%. This paper simultaneously considers several predictors of organic C%: LOI, parent ...
Page, K.L. - - 2009
Increases in soil acidification have led to large increases in the application of aglime to Australian agricultural soils. The addition of aglime has the potential to increase greenhouse gas (GHG) emissions due to the release of C[O.sub.2] during the chemical dissolution of aglime and due to pH-induced changes to soil ...
Taniuchi, Shoichiro - - 2009
The oral desensitization using hypoallergenic wheat was performed for twenty children with a history of wheat allergy. The enrolled subjects were divided into three groups: children with severe wheat allergy, group S; children with mild wheat allergy, group M; children receiving no desensitization, group C. The oral desensitization was performed ...
Ngo, Phung - - 2009
This study evaluated effects of the neurokinin-1 receptor antagonis aprepitant on CY P2C9 as measured by the pharmacokinetics of oral tolbutamide, a substrate of CYP2C9. Healthy young adults were randomized to receive either oral aprepitant 40mg or placebo. All subjects received oral tolbutamide 500 mg at baseline (Day -7 to ...
Yamauchi, Hideki - - 2009
Using a rat model of focal photochemically-induced thrombosis, we demonstrated previously the presence of activated areas in the ipsilateral sensorimotor cortex surrounding areas of cerebral infarction. Using the same model, we next used the images of two-dimensional poly-acrylamide gel electrophoresis (2D-PAGE) and peptide mass fingerprinting (PMF) analysis to screen key ...
Borges, Cristiane Aparecida - - 2009
The purpose of this study was to verify, by a systematic literature review, the effect of resisted exercise applied to the inferior limbs spastic muscles in relationship to muscular force, spasticity and functionality of hemiparetic subjects. A literature review of the Medline, Lilacs, Scielo, PEDro, PubMed and Ebsco databases was ...
Palmer, Geoffrey - - 2009
We report an incident from southeastern Arizona of an adult western screech-owl (Megascops hennicottii) entangled in Coulter spiderling (Boerhaavia coultm), a native forb. Boerhaavia thrives in open areas, such as heavily grazed rangeland and other anthropogenically disturbed land. Rapid urban development may create favorable conditions for proliferation of Boerhaavia and ...
Hampton, Paul - - 2009
Stomach contents of Nerodia fasciata and Nerodia rhombzfer from Louisiana and Texas were examined by either palpation or dissection. Recovered prey included one new prey item (Siren intermedia) for N. fasciata and one (Arius felis) for N. rhombifer. Prey:predator ratios of mass and total size of meals are reported.
Glaudas, Xavier - - 2009
Acquiring water is a challenge for desert animals, and organisms inhabiting arid regions have evolved morphological, physiological, and behavioral traits to maintain an appropriate water balance. On four occasions, I observed rain-harvesting or observed behaviors suggestive of rain harvesting in a population of speckled rattlesnakes (Crotalus mitchellii) in the Mojave ...
McAllister, Chris - - 2009
The silver redhorse Moxostoma anisurum is listed as threatened and considered critically imperiled (S1) in Arkansas by the Nature Conservancy. Only 12 records comprising 23 specimens of this species from five rivers are known from the state. A recent record is from the Strawberry River in Lawrence County during 2007; ...
Almazan-Nunez, R. - - 2009
We present a list of noteworthy distributional records for 12 species of birds in the Mexican state of Guerrero. One (Dendroica striata) is new for the state, and the remaining either significantly expand their known geographic and seasonal distribution or add information about their presence in the state.
Ruvalcaba-Ortega, Irene - - 2009
During an 18-month sampling effort along the Rio Sabinas in Coahuila, Mexico (December 2004-August 2006), we observed eight confirmed and three potentially new breeding records, nine new non-breeding records, and eight rare records of birds for Coahuila. We also identified the Rio Sabinas as a potential new breeding site in ...
Hayes, Mark - - 2009
Allen's big-eared bat (Idionycteris phyllotis) inhabits much of the southwestern USA, but has not been documented in Colorado. We recorded echolocation calls consistent with I. phyllotis near La Sal Creek, Montrose County, Colorado. Based on characteristics of echolocation calls and flight behavior, we conclude that the echolocation calls described here ...
Criffield, Marc - - 2009
Parasites represent an element within natural systems that can elucidate interactions between their hosts and the environment. We collected and examined ectoparasites (80 samples) and fecal samples for endoparasites (81 samples) from 82 swift foxes (Vulpes velox) captured or collected in the Oklahoma Panhandle during summer and winter 2003-2004 and ...
McPhee, Megan - - 2009
We used two mitochondrial and eight nuclear microsatellite gene loci to compare genetic diversity and genetic affinities of white suckers (Catostomus commersonii) introduced into the Rio Grande of northern New Mexico to putative source populations in the Pecos and Canadian rivers of northeastern New Mexico. Estimates of genetic diversity based ...
Merkle, Jerod - - 2009
The Mexican gray wolf (Canis lupus baileyi) was extirpated from Arizona and New Mexico in the 1970s. In 1998, Mexican gray wolves were translocated into the east-central Arizona portion of the Blue Range Wolf Recovery Area. One measure of success of the translocation is the ability of the Mexican gray ...
Watson, Jacqueline - - 2009
We examined contents of alimentary canal from pond-reared Rio Grande silvery minnows (Hybognathus amaras, n = 183) to determine frequency of occurrence for foods consumed among small (9-20 mm), medium (21-35 mm), and large fish (36-75 mm). Among 183 fish, 19% (n = 34) of alimentary canals were empty. Of ...
Blackwell, Bradley - - 2009
We surveyed mercury concentrations of aquatic macroinvertebrates collected from fishless ponds on the Lyndon B. Johnson National Grassland, Wise County, Texas. Macroinvertebrates representing eight taxonomic groups were collected from 13 ponds in June 2006. Significant differences in concentrations of mercury were detected among taxonomic groups, with the omnivore Hydrophilidae and ...
Hibbitts, Toby - - 2009
We studied natural history and ecology of Thamnophis rufipunctatus at San Francisco Hot Springs, Gatron County, New Mexico. Gee minnow traps were more effective at sampling adults than opportunistic captures. Females were larger than males in snout vent length and mass, but males had longer tails. Although females were larger, ...
Ramirez-Bautista, Aurelio - - 2009
We studied reproduction and sexual dimorphism of Aspidoscelis gularis from an arid environment in Guadalcazar, San Luis Potosi, Mexico. Males reached sexual maturity at a larger snout vent length (55. 2 mm) than females (52. 4 mm). Males and females were similar in size, but males had larger heads and ...
Perlichek, Kory - - 2009
Wild turkeys (Meleagris gallopavo) occur intermittently throughout Trans-Pecos, Texas. In the lower desert of the Trans-Pecos, turkeys are associated strongly with the limited riparian habitat where roosting habitat is found. We initiated a study to document microhabitat characteristics of roost sites in the Trans-Pecos region of Texas. We measured microhabitat ...
Gil-Solorzano, Dulce - - 2009
Vegetational development in areas covered by volcanic ash from the Paricutin Volcano shows striking differences among types of plant cover at the time of the eruption. Forests affected by deposition of ash recovered soon after the eruption (1943-1952), but areas lacking vegetation at the time of the eruption today lack ...
Jansen, Brian - - 2009
Understanding how mining operations influence use of habitat and movements by bighorn sheep (Ovis canadensis) is critical to long-term management of populations that inhabit areas in and around mining operations. We studied responses of a population of desert bighorn sheep to a surface-mining operation in the Silver Bell Mountains, Pima ...
Geluso, Keith - - 2009
During a 2-year study, we documented eight species of bats using bridges in the lower Rio Grande Valley of New Mexico. Of 17 bridges surveyed, 15 (88%) contained day-roosting bats and [greater than or equal to] 8 bridges (47%) contained maternity colonies with one or more species, including the Arizona ...
Sanchez-Hernandez, Cornelio - - 2009
The state of Colima in western Mexico is part of the transition zone between the two biogeographic regions of America, the Nearctic and the Neotropical. The state has particularly high mammalian diversity (128 species) and is in the area with the greatest concentration of endemic species in Mexico (25%). As ...
Ramirez-Bautista, Aurelio - - 2009
We studied the reproductive cycle of Sceloporus dugesii from Patzcuaro, Michoacan, Mexico. Males and females reached sexual maturity at the same snout vent length (50 mm). Reproductive activity of both sexes was asynchronous, similar to other species of the torquatus group. Testicular recrudescence was July-August and maximum activity was September-December. ...
Parham, Randy - - 2009
Structure of assemblages of fish at 97 sites using 12 metrics was examined. Of 176 species known from Oklahoma, 118 were collected. Few species had a statewide distribution and most were limited to the eastern one-half of the state. Number of species in a collection was 2-28 with a mean ...
Walde, Andrew - - 2009
The Mojave Desert is one of the driest and hottest deserts in North America. One would expect that birds living in this desert would be specialists adapted to survive such an environment. However, most of the avifauna present in the Mojave Desert range into cooler, more-humid regions. We report observations ...
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