A5014513044- Insect and Arachnid Ecology and Behavior
- Neurobiology and Insect Physiology Research
- Plant and animal studies
- Insect and Pesticide Research
- Animal Behavior and Reproduction
- Neuroendocrine regulation and behavior
- Stress Responses and Cortisol
- Insect Resistance and Genetics
- Insect Utilization and Effects
- Hypothalamic control of reproductive hormones
- Genetics, Aging, and Longevity in Model Organisms
- Cellular transport and secretion
- Olfactory and Sensory Function Studies
- Circadian rhythm and melatonin
- Reproductive System and Pregnancy
- Evolutionary Psychology and Human Behavior
- Animal Ecology and Behavior Studies
- Retinal Development and Disorders
- Physiological and biochemical adaptations
- Invertebrate Immune Response Mechanisms
- Bee Products Chemical Analysis
- Antioxidant Activity and Oxidative Stress
- Neuroscience of respiration and sleep
- Regulation of Appetite and Obesity
- Viral Infectious Diseases and Gene Expression in Insects
Wake Forest University
2010-2024
University of Illinois Urbana-Champaign
1997-2011
University of Washington
1986-2007
Urbana University
1995-1996
Rockefeller University
1984-1989
University of Pennsylvania
1977
Intracerebroventricular (i.c.v.) infusions of oxytocin (OXY) induce short-latency maternal behavior in estrogen-primed virgin rats. To investigate if brain OXY might have a role the onset at parturition, we used both antisera to and an analog antagonist OXY, d(CH2)5-8-ornithine-vasotocin, reduce activity endogenous pregnancy-terminated preparation which yields reliable behavior. Sprague-Dawley rats with lateral ventricle cannulae were ovariectomized hysterectomized on day 16 gestation; was...
A worker honeybee performs tasks within the hive for approximately first 3 weeks of adult life. After this time, it becomes a forager, flying repeatedly to collect food outside remainder its 5–6 week Previous studies have shown that foragers an increased volume neuropil associated with mushroom bodies, brain region involved in learning, memory, and sensory integration. We report here growth body bees occurs throughout life continues after begin forage. Studies using Golgi impregnation asked...
ABSTRACT In insects, the ecdysteroids act to transform CNS from its larval adult form. A key gene in this response is ecdysone receptor (EcR), which has been shown Drosophila code for 3 protein isoforms. Two of these isoforms, EcR-A and EcR-B1, are prominently expressed we have used isoform-specific antibodies examine their fluctuations through postembryonic life. EcR expression at onset metamorphosis extremely diverse but specific patterns correlate with distinct steroid response. Most...
Abstract There is an age‐related division of labor in the honey bee colony that regulated by juvenile hormone. After completing metamorphosis, young workers have low titers hormone and spend first several weeks their adult lives performing tasks within hive. Older workers, approximately 3 age, high forage outside hive for nectar pollen. We previously reported changes volume mushroom bodies brain are temporally associated with performance foraging. The neuropil increased volume, whereas...
Worker honeybees (Apis mellifera) were reared in social isolation complete darkness to assess the effects of experience on growth neuropil mushroom bodies (MBs) during adult life. Comparison volume MBs 1-day-old and 7-day-old bees showed that a significant increase MB occurred first week life under these highly deprived conditions. All regions experienced with exception basal ring. Measurement titers juvenile hormone JH) subset indicated that, as previous studies, rearing conditions induced...
The mushroom bodies are paired neuropils in the insect brain that act as multimodal sensory integration centers and involved learning memory. Our studies, by using 5-bromo-2-deoxyuridine incorporation Feulgen technique, show immediately before pupation, of developing honey bee (Apis mellifera) contains approximately 2,000 neuroblasts devoted to production body intrinsic neurons (Kenyon cells). These descended from four clusters 45 or fewer each already present newly hatched larva....
Abstract Fluorescent dye retrograde tracing was combined with steroid hormone autoradiography to study the midbrain projections of estrogen‐concentrating neurons in preoptic region rat brain. Microinjections dyes DAPI, true blue, or a mixture DAPI and primuline were made into ventral tegmental area central gray ovariectomized, adrenalectomized 2‐3‐month‐old female rats; 3 4 days later these animals injected [ H]estradiol; brains then processed for autoradiography. After exposures from 12...
Abstract The emergence of the adult Manduca sexta moth is accompained by death half neurons present in pupal abdominal nervous system (Truman, 1983). This developmental neuronal highly selective, so that same die at time relative to every moth. In case MN‐12 motoneurons, this cell regulated both hemolymph concentrations a steroid hormone, 20‐hydroxyecdysone, and actions exerted adjacent ganglia (Truman Schwartz, 1984; Fahrbach Truman, 1987). latter effect, which has been previously described...
Honey bees begin life working in the hive. At ≈3 weeks of age, they shift to visiting flowers forage for pollen and nectar. Foraging is a complex task associated with enlargement mushroom bodies, brain region important insects certain forms learning memory. We report here that foraging had larger volume body neuropil than did age-matched confined This result indicates direct experience world outside hive causes growth bees. also show oral treatment caged pilocarpine, muscarinic agonist,...