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Articles 7351 - 7380 of 11445

Full-Text Articles in Entomology

Aquatic Macroinvertebrates Collected From Thirty-Two Missouri Ozark Streams, George L. Harp, Phoebe A. Harp, Samuel B. Mccord Jan 2008

Aquatic Macroinvertebrates Collected From Thirty-Two Missouri Ozark Streams, George L. Harp, Phoebe A. Harp, Samuel B. Mccord

Journal of the Arkansas Academy of Science

A previously reported study of the distribution and status of an endemic dragonfly in Missouri emphasized data collected by aerial netting and examination of specimens housed in the Wilbur Enns Museum of Entomology. Dip net samples were also taken, however, to find naiads of the target species at sites where adults might not have been found and to determine whether there were associated species. Forty-one collections were made in 32 Ozark streams between mid-May and early June 1999-2000. Of the 372 taxa identified, Psephenus herricki was the most frequently associated species. Six of the 32 streams either had not been …

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New Distributional Records Of Ants In Arkansas, David M. General, Lynne C. Thompson Jan 2008

New Distributional Records Of Ants In Arkansas, David M. General, Lynne C. Thompson

Journal of the Arkansas Academy of Science

No abstract provided.

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Using Ninhydrin To Detect Gravesoil, David O. Carter, David Yellowlees, Mark Tibbett Jan 2008

Using Ninhydrin To Detect Gravesoil, David O. Carter, David Yellowlees, Mark Tibbett

Department of Entomology: Faculty Publications

Some death scene investigations commence without knowledge of the location of the body and/or decomposition site. In these cases, it is necessary to locate the remains or the site where the body decomposed prior to movement. We hypothesized that the burial of a mammalian cadaver will result in the release of ninhydrin reactive nitrogen (NRN) into associated soil and that this reaction might have potential as a tool for the identification of clandestine graves. Juvenile rat (Rattus rattus) cadavers were buried in three contrasting soil types in Australian tropical savanna ecosystems and allowed to decompose over a period …

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Sugar Feeding In Adult Stable Flies, David B. Taylor, Dennis R. Berkebile Jan 2008

Sugar Feeding In Adult Stable Flies, David B. Taylor, Dennis R. Berkebile

Department of Entomology: Faculty Publications

Adult stable flies (Stomoxys calcitrans L.) are known to feed readily on sugars in the laboratory. However, little is known concerning the extent of stable fly sugar feeding in wild populations. We examined the frequency of sugar feeding in stable flies collected on Alsynite sticky traps in rural and urban environments. In addition, stable flies were visually examined to determine whether blood was present in the gut. In laboratory studies, sugars were detectable with the anthrone technique in stable flies for ~3 d after being imbibed, and blood could be visually detected in the gut for 24-48 h after …

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Ants Of Arkansas Post National Memorial: How And Where Collected, David M. General, Lynne C. Thompson Jan 2008

Ants Of Arkansas Post National Memorial: How And Where Collected, David M. General, Lynne C. Thompson

Journal of the Arkansas Academy of Science

A knowledge of the fauna of natural areas is necessary for their sustainable management. Thus, intensive ant sampling over multiple years was conducted at Arkansas Post National Memorial in southeastern Arkansas. Our collecting techniques included: pitfalls; leaf litter sifting with Berlese extraction; breaking into twigs, branches, and coarse woody debris located on the ground; baiting tree trunks with peanut butter; and general hand collecting. Ants were collected from diverse habitats, including: open mowed-grass, mowed-grass under hardwood trees, unmowed tall-grass and weeds, and numerous forest types. A total of 43 species in 25 genera and 6 subfamilies were identified. The number …

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Nebline, January 2008 Jan 2008

Nebline, January 2008

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

“Parents Forever” Class Teaches Parents How to Help Children Through a Divorce
Coalition to Assist Children of Parents Experiencing Divorce
Nebraska’s New Parenting Act Puts Children at the Center—Not in the Middle—of Divorce
Upcoming Pesticide Applicator Trainings
Crop Protection Clinic, Jan. 22
Computerized Farm Financial Recordkeeping Workshop, Feb. 16
Year-Round Insect Pests in the Home
Ultrasonic/Subsonic Devices Not Effective for Pest Control
Beginning Beekeeping 2-Day Workshop
Got Deer Problems or Pocket Gophers? UNL Wildlife Experts Need Your Help
Florist Azalea Plant Care
A Gardener’s New Year’s Resolutions
Proper Landscape Plant Maintenance
About Soil Testing
Attract More Birds by Offering a …

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A New Species Of Schizomyia (Diptera: Cecidomyiidae), A Pest Of Fernaldia Pandurata (Apocynaceae) In Central America, Raymond Gagne, Rafael Menjivar Jan 2008

A New Species Of Schizomyia (Diptera: Cecidomyiidae), A Pest Of Fernaldia Pandurata (Apocynaceae) In Central America, Raymond Gagne, Rafael Menjivar

USDA Systematic Entomology Laboratory

A new species of gall midge, Schizomyia loroco Gagné (Diptera:Cecidomyiidae), is described from loroco, Fernaldia pandurata (A. DC.) Woodson (Apocynaceae), from El Salvador. Females lay eggs in flower buds that then produce characteristic galls. The new species is described, illustrated, and compared to its congeners.

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A New Species Of Wockia Heinemann, 1890 (Lepidoptera: Urodidae) From Korea, Jae-Cheon Sohn, David Adamski Jan 2008

A New Species Of Wockia Heinemann, 1890 (Lepidoptera: Urodidae) From Korea, Jae-Cheon Sohn, David Adamski

USDA Systematic Entomology Laboratory

Wockia koreana Sohn, n. sp., is described from Korea, representing the first record of Urodidae in eastern Asia. Biological and distributional data including host-plant records are provided. Photographs of the holotype and dimorphic antennal and hind tibial features are included in addition to illustrations of wing venation and male and female genitalia.

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North American Species Of Agrostocynips Diaz (Hymenoptera: Figitidae: Eucoilinae), Parasitoids Of Agromyzidae (Diptera): Bionomics And Taxonomy, Matthew L. Buffington, Sonja J. Scheffer Jan 2008

North American Species Of Agrostocynips Diaz (Hymenoptera: Figitidae: Eucoilinae), Parasitoids Of Agromyzidae (Diptera): Bionomics And Taxonomy, Matthew L. Buffington, Sonja J. Scheffer

USDA Systematic Entomology Laboratory

The genus Agrostocynips Diaz is redescribed, as well as two species endemic to the Nearctic: Agrostocynips diastrophi (Ashmead) and A. robusta (Ashmead). Previous to this study, only Neotropical species of Agrostocynips were well diagnosed both taxonomically and biologically. Agrostocynips belongs to the Zaeucoila group of genera, which are Neotropical eucoilines that principally parasitize Agromyzidae (Diptera); among these genera, species of Agrostocynips are some of the few representatives that are found in the Nearctic. Detailed host records and biological notes are provided for the Nearctic species.

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A New Species Of Eurytoma (Hymenoptera: Eurytomidae) Attacking Quadrastichus Spp. (Hymenoptera: Eulophidae) Galling Erythrina Spp. (Fabaceae), With A Summary Of African Eurytoma Biology And Species Checklist, Michael William Gates, Gerard Delvare Jan 2008

A New Species Of Eurytoma (Hymenoptera: Eurytomidae) Attacking Quadrastichus Spp. (Hymenoptera: Eulophidae) Galling Erythrina Spp. (Fabaceae), With A Summary Of African Eurytoma Biology And Species Checklist, Michael William Gates, Gerard Delvare

USDA Systematic Entomology Laboratory

Eurytoma erythrinae Gates and Delvare, new species, is described and illustrated. This species was reared from fieldcollected galls on Erythrina spp. (Fabaceae) induced by Quadrastichus spp. (Hymenoptera: Eulophidae), in Tanzania, Ghana, and South Africa. It is compared with very similar African species, Eurytoma radicicola Risbec. Afrotropical species classified in Eurytoma are reviewed and twenty-seven new combinations are proposed: Aximopsis acaciacola (Hedqvist) comb. n., A. caryedocida (Rasplus) comb. n., A. lamtoensis (Rasplus) comb. n., A. mateui (Hedqvist) comb. n., A. mimosarum (Rasplus) comb. n., A. obocki (Risbec) comb. n., A …

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Lignin Degradation In Wood-Feeding Insects, Scott M. Geib, Timothy R. Filley, Patrick G. Hatcher, Kelli Hoover, John E. Carlson, Maria Del Mar Jimenez-Gasco, Akiko Nakagawa-Izumi, Rachel L. Sleighter, Ming Tien Jan 2008

Lignin Degradation In Wood-Feeding Insects, Scott M. Geib, Timothy R. Filley, Patrick G. Hatcher, Kelli Hoover, John E. Carlson, Maria Del Mar Jimenez-Gasco, Akiko Nakagawa-Izumi, Rachel L. Sleighter, Ming Tien

Chemistry & Biochemistry Faculty Publications

The aromatic polymer lignin protects plants from most forms of microbial attack. Despite the fact that a significant fraction of all lignocellulose degraded passes through arthropod guts, the fate of lignin in these systems is not known. Using tetramethylammonium hydroxide thermochemolysis, we show lignin degradation by two insect species, the Asian longhorned beetle (Anoplophora glabripennis) and the Pacific dampwood termite (Zootermopsis angusticollis). In both the beetle and termite, significant levels of propyl side-chain oxidation (depolymerization) and demethylation of ring methoxyl groups is detected; for the termite, ring hydroxylation is also observed. In addition, culture-independent fungal gut …

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Silencing Expression Of The Defensin, Varisin, In Male Dermacentor Variabilis By Rna Interference Results In Reduced Anaplasma Marginale Infections, Katherine M. Kocan, Jose De La Fuente, Raul Manzano-Roman, Victoria Naranjo, Wayne L. Hynes, Daniel E. Sonenshine Jan 2008

Silencing Expression Of The Defensin, Varisin, In Male Dermacentor Variabilis By Rna Interference Results In Reduced Anaplasma Marginale Infections, Katherine M. Kocan, Jose De La Fuente, Raul Manzano-Roman, Victoria Naranjo, Wayne L. Hynes, Daniel E. Sonenshine

Biological Sciences Faculty Publications

Antimicrobial peptides, including defensins, are components of the innate immune system in ticks that have been shown to provide protection against both gram-negative and gram-positive bacteria. Varisin, one of the defensins identified in Dermacentor variabilis, was shown to be produced primarily in hemocytes but transcript levels were also expressed in midguts and other tick cells. In this research, we studied the role of varisin in the immunity of ticks to the gram-negative cattle pathogen, Anaplasma marginale. Expression of the varisin gene was silenced by RNA interference (RNAi) in which male ticks were injected with varisin dsRNA and then …

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Contents, Discovery Editors Jan 2008

Contents, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Letter From The Dean, Lalit R. Verma Jan 2008

Letter From The Dean, Lalit R. Verma

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Two Lygaeoidea (Hemiptera), Ischnodemus Slossonae And Cryphula Trimaculata, New For Arkansas, U.S.A., Stephen W. Chordas Iii, Peter W. Kovarik Jan 2008

Two Lygaeoidea (Hemiptera), Ischnodemus Slossonae And Cryphula Trimaculata, New For Arkansas, U.S.A., Stephen W. Chordas Iii, Peter W. Kovarik

Journal of the Arkansas Academy of Science

No abstract provided.

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Two Coreidae (Hemiptera), Chelinidea Vittiger And Anasa Armigera,New For Arkansas, U.S.A., Stephen W. Chordas Iii, Peter W. Kovarik Jan 2008

Two Coreidae (Hemiptera), Chelinidea Vittiger And Anasa Armigera,New For Arkansas, U.S.A., Stephen W. Chordas Iii, Peter W. Kovarik

Journal of the Arkansas Academy of Science

No abstract provided.

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Insects Inhabiting The Burrows Of The Ozark Pocket Gopher In Arkansas, Peter W. Kovarik, Stephen W. Chordas Iii, H. Robison, P. Skelley, M. Connior, J. Fiene, G. Heidt Jan 2008

Insects Inhabiting The Burrows Of The Ozark Pocket Gopher In Arkansas, Peter W. Kovarik, Stephen W. Chordas Iii, H. Robison, P. Skelley, M. Connior, J. Fiene, G. Heidt

Journal of the Arkansas Academy of Science

Pocket gopher burrows provide a stable environment for a variety of inquilines; hence this mammal is regarded as a keystone species. Most of the arthropods inhabiting pocket gopher burrows are restricted to this microhabitat. As part of a planned state-wide biotic survey of insects inhabiting this unusual microhabitat, we have focused our initial sampling efforts on the Ozark pocket gopher (Geomys bursarius ozarkensis; Geomyidae). In 2004 and 2005, pitfall traps were established in pocket gopher burrows and in 2007 and 2008, nests and associated chambers were excavated. Retrieved samples contained scarab, histerid, and rove beetles, cave crickets and anthomyiid flies. …

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The Integration Of Mosquito Avian Host Preference With West Nile Virus Activity In Wild Bird And Mosquito Populations In Baton Rouge, Louisiana, Jessica Erin Brauch Jan 2008

The Integration Of Mosquito Avian Host Preference With West Nile Virus Activity In Wild Bird And Mosquito Populations In Baton Rouge, Louisiana, Jessica Erin Brauch

LSU Master's Theses

West Nile virus (WNV) infection rates in wild birds and mosquitoes, and the blood-feeding patterns of mosquitoes were examined at two study sites in Baton Rouge, Louisiana to identify the potential avian reservoir hosts and mosquito vectors of West Nile virus (WNV). Blood samples from a total of 2,442 wild birds in the orders Passeriformes, Piciformes and Columbiformes were collected from May 2006 to April 2008 and tested for the presence of WNV RNA using RT-PCR and antibodies to WNV using an epitope-blocking ELISA. WNV was detected in 3.77% of wild bird blood samples and antibodies to WNV were detected …

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Succession Of Coleoptera On Freshly Killed Loblolly Pine (Pinus Taeda L.) And Southern Red Oak (Quercus Falcata Michaux) In Louisiana, Stephanie Gil Jan 2008

Succession Of Coleoptera On Freshly Killed Loblolly Pine (Pinus Taeda L.) And Southern Red Oak (Quercus Falcata Michaux) In Louisiana, Stephanie Gil

LSU Master's Theses

Wood is important in forest ecology because its large biomass serves as a nutritional substrate and habitat for many organisms, including Coleoptera, and beetles contribute greatly to nutrient recycling in forests. Overlapping complexes of beetles invade dead wood according to the species of tree, ambient conditions, and most importantly, stage of decomposition. Beetle succession was studied in loblolly pines (Pinus taeda L.) and southern red oaks (Quercus falcata Michx.) by documenting beetle arrival and residency in cut, reassembled, and standing bolts. Twelve trees of each species at Feliciana Preserve in West Feliciana parish, LA were felled during October 2004 and …

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Characterizing The Epidemiology Of Bluetongue Virus Serotype One In South Louisiana, Michael Edward Becker Jan 2008

Characterizing The Epidemiology Of Bluetongue Virus Serotype One In South Louisiana, Michael Edward Becker

LSU Master's Theses

In November 2004, bluetongue virus (BTV) serotype 1 was detected for the first time in the U.S. from a hunter-killed deer in the marsh area of the Atchafalaya Delta in St. Mary Parish, LA. Subsequent serum surveys of three cattle farms further inland from the area where the deer was shot found bluetongue virus serotype 1 positive cattle on two of the three farms. The purpose of this study was to determine potential BTV vectors in the area where BTV-1 positive animals were detected and compare different trapping techniques for capturing specimens of the genus Culicoides. The study was conducted …

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Resistance To Bacillus Thuringiensis In Sugarcane Borer, Diatraea Saccharalis (F.), Xiaoyi Wu Jan 2008

Resistance To Bacillus Thuringiensis In Sugarcane Borer, Diatraea Saccharalis (F.), Xiaoyi Wu

LSU Doctoral Dissertations

The sugarcane borer, Diatraea saccharalis (F.), is a dominant corn stack boring pest and a major target of Bacillus thuringiensis (Bt)-corn in many areas of the mid-southern region of the United States. A Cry1Ab-resistant strain of D. saccharalis, capable of survival on commercial Bt corn plants, was established using an F2 screening procedure. Larval survival of Cry1Ab-resistant, -susceptible, and -heterozygous genotypes was evaluated on five non-Bt and seven Bt field corn hybrids at two plant stages. During the vegetative stages, all seven Bt corn hybrids were highly efficacious against the three genotypes, while 8-18% of the heterozygous genotype survived on …

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Novel Methods For The Control Of Phlebotomine Sand Flies (Diptera: Psychodidae), Thomas Michael Mascari Jan 2008

Novel Methods For The Control Of Phlebotomine Sand Flies (Diptera: Psychodidae), Thomas Michael Mascari

LSU Doctoral Dissertations

In arid and semi-arid parts of the Old World, Phlebotomus paptasi is a significant biting pest of man and is the primary vector of Leishmania major, the causative agent of zoonotic cutaneous leishmaniasis (ZCL). Phlebotomus papatasi exhibits a close association with the burrowing rodents that serve as the reservoirs of L. major. Rodent burrows are considered to be the primary habitat of immature P. papatasi in ZCL foci, and sand fly larvae have been observed feeding on rodent feces. In laboratory studies, five insecticides (diflubenzuron, novaluron, methoprene, pyriproxyfen, or ivermectin) were incorporated into the diet of Syrian hamsters and evaluated …

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The Role Of Spiders In The Detrital Food Web Of An Eastern Deciduous Forest, Erin Elizabeth Hladilek Jan 2008

The Role Of Spiders In The Detrital Food Web Of An Eastern Deciduous Forest, Erin Elizabeth Hladilek

University of Kentucky Doctoral Dissertations

Historically, terrestrial food web research has focused on describing the structure of aboveground grazing webs, and determining how interactions among plants, herbivores and higher trophic levels influence primary productivity. Detrital food webs however, play a significant role in regulation of ecosystem dynamics through direct impacts on decomposition. Unraveling the complex nature of detrital food web structure is critical to developing a better understanding of ecosystem function. Therefore the primary objective of this research was to describe the structure of the leaf-litter food web in a temperate deciduous forest, with emphasis on interactions between a community of generalist predators, the forest-floor …

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Factors Potentially Influencing The Abundance Of Mosquitoes In Louisiana Rice Fields, Ana Maria Sanchez De Cuadra Jan 2008

Factors Potentially Influencing The Abundance Of Mosquitoes In Louisiana Rice Fields, Ana Maria Sanchez De Cuadra

LSU Master's Theses

The rice stink bug (Oebalus pugnax) is the major pest of late-season rice in Louisiana. Prior studies indicate that large populations of mosquitoes are often present in rice fields during the time that rice fields are infested with rice stink bugs. Lambda-cyhalothrin (Karate®) is widely used to control rice stink bugs. The purpose of this study was to determine if application of the insecticide Karate® at a rate of 0.033 kg/ha, for rice stink bug control had an effect on the population of mosquitoes in rice fields. This effect was assessed by monitoring natural populations of mosquitoes before and after …

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Survival, Growth, And Behavior Of Helicoverpa Zea (Boddie) And Heliothis Virescens (F.) (Lepidoptera: Noctuidae) On Genetically Engineered Cotton Expressing The Vip3a Insecticidal Protein, Padma Latha Bommireddy Jan 2008

Survival, Growth, And Behavior Of Helicoverpa Zea (Boddie) And Heliothis Virescens (F.) (Lepidoptera: Noctuidae) On Genetically Engineered Cotton Expressing The Vip3a Insecticidal Protein, Padma Latha Bommireddy

LSU Doctoral Dissertations

Larval behavior, survivorship, and injury potential of Helicoverpa zea (Boddie), and tobacco budworm, Heliothis virescens (F.), was evaluated on cotton plants genetically engineered to express Bacillus thuringiensis (Bt) insecticidal proteins, Vip3A and Vip3A +Cry 1Ab (VipCot™). Larvae (2-d-old) of both species were infested on plant terminals of vegetative or flowering stage cotton plants. Regardless of species, more larvae migrated from the plant terminals of Vip3A and VipCot plants compared to larvae infested on a conventional non-Bt cotton line (Coker 312). Larval (2-d-old) survivorship on VipCot™ plant structures was generally lower than that on similar structures of the Vip3A cotton line. …

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New Records Of Eurymerodesmid Millipeds (Diplopoda: Polydesmida) From Arkansas, Kansas, Louisiana, Oklahoma, And Texas, Chris T. Mcallister, Rowland M. Shelley Jan 2008

New Records Of Eurymerodesmid Millipeds (Diplopoda: Polydesmida) From Arkansas, Kansas, Louisiana, Oklahoma, And Texas, Chris T. Mcallister, Rowland M. Shelley

Journal of the Arkansas Academy of Science

No abstract provided.

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Biodiversity Of Insects From The Syrphidae And Carabidae Families In Three Ecological Niches (Forest, Forest Boarder, And Farming Area) In Three Communities Of The Coroico Municipality, Nor Yungas, La Paz, Eddy Alarcón Jan 2008

Biodiversity Of Insects From The Syrphidae And Carabidae Families In Three Ecological Niches (Forest, Forest Boarder, And Farming Area) In Three Communities Of The Coroico Municipality, Nor Yungas, La Paz, Eddy Alarcón

Theses and Dissertations

Today, biodiversity is one of the most studied disciplines because it encompasses all species of plants, animals, and microorganisms that exist and act within an ecosystem. In recent decades, biodiversity has been degrading rapidly due to the simplification of agricultural systems, and the irrational use of pesticides that alter the normal function of ecosystems. Within nature, each insect population is attacked by one or more natural enemies. In this investigation, during a six month period from June to December 2006, the biodiversity of predatory insects from the syrphidae and carabidae families was determined in three ecological niches of three communities …

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Concentration-Dependent Degradation Of Three Termiticides In Soil Under Laboratory Conditions And Their Bioavailability To Eastern Subterranean Termites (Isoptera: Rhinotermitidae), Raj K. Saran, Shripat T. Kamble Jan 2008

Concentration-Dependent Degradation Of Three Termiticides In Soil Under Laboratory Conditions And Their Bioavailability To Eastern Subterranean Termites (Isoptera: Rhinotermitidae), Raj K. Saran, Shripat T. Kamble

Department of Entomology: Faculty Publications

Degradation and bioavailability of imidacloprid, fipronil, and bifenthrin applied at label rates ([AI], wt:wt in soil) in the loamy soil of Nebraska were determined over a 6-mo duration. Based on the calculated half-lives of the three termiticides, it was concluded that the degradation rate was lowest when a termiticide was applied at the highest label rate. Bioassays of Reticulitermes flavipes (Kollar) (Isoptera: Rhinotermitidae) conducted at 8, 31, 65, 90, 135, 160, and 180 d posttreatment showed an inverse relationship between the LT90 values and the variable concentrations. At day 180, exposures to all the termiticide-treated soil samples (concentration × …

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Inheritance Of Cry1f Resistance In Laboratory-Selected European Corn Borer And Its Survival On Transgenic Corn Expressing The Cry1f Toxin, E. J. G. Pereira, N. P. Storer, Blair D. Siegfried Jan 2008

Inheritance Of Cry1f Resistance In Laboratory-Selected European Corn Borer And Its Survival On Transgenic Corn Expressing The Cry1f Toxin, E. J. G. Pereira, N. P. Storer, Blair D. Siegfried

Department of Entomology: Faculty Publications

A major assumption of the high-dose/refuge strategy proposed for insect resistance management strategies for transgenic crop plants that express toxins from Bacillus thuringiensis is that resistance traits that evolve in pest species will be recessive. The inheritance of Cry1F resistance and larval survival on commercially available Cry1F corn hybrids were determined in a laboratory-selected strain of European corn borer, Ostrinia nubilalis (Hu¨ bner), displaying more than 3000-fold resistance to Cry1F. Concentration-response bioassays of reciprocal parental crosses indicated that the resistance is autosomal and recessive. Bioassays of the backcross of the F1 generation with the selected strain were consistent with …

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Invasion Of Europe By The Western Corn Rootworm, Diabrotica Virgifera Virgifera: Multiple Transatlantic Introductions With Various Reductions Of Genetic Diversity, M. Ciosi, Nicholas Miller, R. Giordano, A. Estoup, T. Guillemaud, S. Kim Jan 2008

Invasion Of Europe By The Western Corn Rootworm, Diabrotica Virgifera Virgifera: Multiple Transatlantic Introductions With Various Reductions Of Genetic Diversity, M. Ciosi, Nicholas Miller, R. Giordano, A. Estoup, T. Guillemaud, S. Kim

Department of Entomology: Faculty Publications

The early stages of invasion involve demographic bottlenecks that may result in lower genetic variation in introduced populations as compared to source population/s. Low genetic variability may decrease the adaptive potential of such populations in their new environments. Previous population genetic studies of invasive species have reported varying levels of losses of genetic variability in comparisons of source and invasive populations. However, intraspecific comparisons are required to assess more thoroughly the repeatability of genetic consequences of colonization events. Descriptions of invasive species for which multiple introductions from a single source population have been demonstrated may be particularly informative. The western …

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