A5026715728- Plant and animal studies
- Insect and Arachnid Ecology and Behavior
- Insect and Pesticide Research
- Lepidoptera: Biology and Taxonomy
- Animal Behavior and Reproduction
- Ecology and Vegetation Dynamics Studies
- Plant Parasitism and Resistance
- Insect-Plant Interactions and Control
- Biological Control of Invasive Species
- Neurobiology and Insect Physiology Research
- Plant Diversity and Evolution
- Genetic diversity and population structure
- Forest Insect Ecology and Management
- Chromosomal and Genetic Variations
- Insect Pheromone Research and Control
- Plant Molecular Biology Research
- Cassava research and cyanide
- Insect behavior and control techniques
- Rangeland and Wildlife Management
- Animal and Plant Science Education
- Insect symbiosis and bacterial influences
- Genomics and Phylogenetic Studies
- Allelopathy and phytotoxic interactions
- Plant Reproductive Biology
- Animal Ecology and Behavior Studies
The University of Texas at Austin
2016-2025
University Medical Center Brackenridge
2010-2024
George Washington University
2023-2024
Smithsonian Tropical Research Institute
2023-2024
UC Irvine Health
2023
King Abdulaziz University
2020
Universidad Mayor de San Andrés
2016
University of California, Davis
2016
University of Minnesota
2016
IPB University
2016
The evolutionary importance of hybridization and introgression has long been debated. Hybrids are usually rare unfit, but even infrequent can aid adaptation by transferring beneficial traits between species. Here we use genomic tools to investigate in Heliconius, a rapidly radiating genus neotropical butterflies widely used studies ecology, behaviour, mimicry speciation. We sequenced the genome Heliconius melpomene compared it with other taxa chromosomal evolution Lepidoptera gene flow among...
Radiotracer studies on three butterfly species showed that nutrients contributed by males through mating are used females for egg production and possibly somatic maintenance.
Butterflies of the neotropical Genus Heliconius feed on pollen. This is first known instance in butterflies a habit that well for other insects. The remove amino acids and proteins from pollen; this feeding innovation plays role reproductive population biology these It suggested animals may use pollen similar fashion.
Sexual isolation is a critical form of reproductive in the early stages animal speciation, yet little known about genetic basis divergent mate preferences and preference cues young species. Heliconius butterflies, well for their diversity wing color patterns, assortatively as result divergence male patterns. Here we show that specific cue used by cydno pachinus males to recognize conspecific females patches on wings. In addition, segregates with forewing hybrids, indicating association...
Abstract Invasive species are a leading cause of global biodiversity decline. Larvae the cactus moth Cactoblastis cactorum Berg (Lepidoptera: Pyralidae: Phycitinae) consume prickly pear ( Opuntia ; Cactaceae) in its native South American range. High host specificity made C. an appropriate biological control agent species, which have become invasive weeds around world. This program was successful. Ironically, success weed facilitated series events led to invasion North America where diversity...
New oocytes are generated throughout long lives in butterflies of the genus Heliconius, which as adults feed on amino acids from pollen. In Dryas julia, a related heliconiine that feeds only nectar and is relatively short-lived, original oocyte supply eventually depleted. Such divergent ovarian dynamics closely organisms significant terms both their evolutionary basis physiological controls.
Journal Article Why are there so many mimicry rings? Correlations between habitat, behaviour and in Heliconius butterflies Get access JAMES MALLET, MALLET 1Galton Laboratory, Department of Genetics Biometry, 4 Stephenson Way, London NW1 2HE Search for other works by this author on: Oxford Academic Google Scholar LAWRENCE E. GILBERT, Jr. 2Department Zoology University Texas at Austin, TX 78712, U.S.A. Biological the Linnean Society, Volume 55, Issue 2, June 1995, Pages 159–180,...
Capture-recapture studies of a Heliconius ethilla colony occupying ridge in northern Trinidad were carried out over 27-month period. Individuals had limited home ranges based primarily on the distribution pollen sources which visited course daily activity. These fell into two virtually discrete sets, dividing populations rarely exchanged individuals. The size populations, and thus colony, remained remarkably stable entire study, covered about 27 generations. This constancy appears to result...
Genetic crosses between races of Heliconius erato that differ in the odor female abdominal glands show originates male and is transferred to at mating. Behavioral observations strongly suggest an antiaphrodisiac helps enforce monogamy among females.
Butterfly Apartheid Heliconius butterflies show differences in mimetic color patterns across geographic races associated with of assortative mating, suggesting that ecological speciation may be ongoing. Chamberlain et al. (p. 847 ) demonstrate mating on the basis pattern mimicry generates reproductive isolation between cydno species and subspecies within polymorphic populations Ecuador. Furthermore, it appears these traits are controlled by a single gene affects pigment wing formation...
Experiments show that Heliconius butterflies are less likely to oviposit on host plants possess eggs or egglike plant structures. These egg mimics an unambiguous example of a trait evolved in response host-restricted group insect herbivores.
Hooklike trichomes of Passiflora adenopoda provide a specific, effectively absolute defense against heliconiine butterfly larvae, major class herbivores. It is suggested that since mechanical defenses are usually more selective in their action herbivores, they evolved by plant only after it has accumulated series chemical defenses.
Populations of the butterfly Euphydryas editha differ in dispersal rates component individuals. We give evidence that these differences are at least partly genetically based and result long-term selection pressures associated with detailed ecology each population. Within this framework, population structure is affected by distributions larval adult resources space time, described detail for two populations contrasting types. predict genetic consequences interpopulation use our observations...
While the ecological factors that drive phenotypic radiations are often well understood, less is known about generative mechanisms cause emergence and subsequent diversification of novel features. Heliconius butterflies display an extraordinary diversity wing patterns due in part to mimicry sexual selection. Identifying genetic drivers this crucible evolution now within reach, as it was recently shown cis-regulatory variation optix transcription factor explains red pattern differences...
The invasion of Brackenridge Field Laboratory, Austin, Texas, by the multiple-queen form red imported fire ant, Solenopsis invicta Buren, was monitored for 3 yr. This provides a rare glimpse competitive replacement in progress. It has been remarkable two reasons. First, ant colonies replaced native geminata (F.), at ratio 6:1, indicating radical restructuring arthropod community rather than simple one-for-one substitution an equivalent species. Secondly, proceeded very slow rate (about 35...
Abstract The phylogenetic relationships and chromosomal evolution of the diverse tropical genus Passiflora (Passifloraceae) are explored using data from two chloroplast markers: rpoC1 intron trnL/trnT spacer region. A survey presence or absence in 136 species representing 17 Killip's (1938) 22 subgenera four other genera Passifloraceae revealed losses 46 taxa. minimum were confirmed by a parametric bootstrap approach on sequence non-coding region for 61 results analyses support reduction to...
Abstract Introgressive hybridization is an important evolutionary process and new analytical methods provide substantial power to detect quantify it. In this study we use variation in the frequency of 657 AFLP fragments DNA sequence from 15 genes measure extent admixture direction interspecific gene flow among three Heliconius butterfly species that diverged recently as a result natural selection for Müllerian mimicry, which continue hybridize. Bayesian clustering based on genotypes...
Patterns of inheritance the chloroplast genome in Passiflora were analyzed by examining progeny from both interspecific and intraspecific crosses. Artificial crosses field‐collected material performed greenhouses at The University Texas Austin. DNA fresh leaf was Southern blot techniques to identify donor genome. Initially, single for 11 crosses; two demonstrated maternal inheritance, whereas nine had paternal inheritance. Subsequently, determined multiple seven oerstedii × P. retipetala...