Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 30 for “"sex pheromone"”.
-
Insect pheromones : the sex pheromone of Nudaurelia cytherea cytherea Fabr. : (Lepidoptera : Saturniidae)
… isolation, identification and synthesis of the sex pheromone from the female pine tree emperor moth Nudaurelia cytherea cytherea Fabr. (Lepidoptera : Saturniidae) are described.
-
Mounting Sex Pheromone: A Novel Pheromone Responsible for Mate Recognition in the Ixodidae
… was demonstrated to be the cuticular contact sex pheromone of <em>Dermacentor variabilis</em>. This pheromone which has been termed the Mounting Sex Pheromone (MSP) was also demonstrated to be present on the surface of <em>D</em>. <em>andersoni</em>, <em>Amblyomma maculatum</em> and <em>A. …
-
Sex pheromone studies on the grass grub (Costelytra Zealandica (White)) and the common army worm
This thesis describes the identification of a sex pheromone of the grass grub beetle, Costelytra zealandica, and the attempts to use the sex pheromone directly to control grass grub infestations. The partial identification of a sex pheromone of the common armyworm moth, Pseudaletia separata, is …
-
Sex, pheromone and aggression in Norway lobster (Nephrops norvegicus) : for a better future of scampi
… claws compared to the females showing additional sexual dimorphisms in the species. Moreover, Nephrops with larger claws tend to win the fights showing that claw size affects the outcome of fights.In lobsters, mating usually occurs after the female has moulted, and is in the soft shell condition. …
-
Re-investigation of the female sex pheromone of the legume podborer, Maruca vitrata (Lepidopters: Crambidae)
… and (E)-10-hexadecenal (E10-16:Ald) as sex pheromone components of female M. vitrata. They developed a lure that attracts male moths in the field in Benin but they failed to attract male moths in the laboratory, or to develop a lure that attracts male moths in Asia or the rest of Africa. …
-
Insect pheromones : the synthesis of the sex pheromone of Cryptoplebia leucotreta Meyr. and related compounds
The concept of pheromones is briefly expounded leading on to a discussion of the identified sex pheromones in the order Lepidoptera. The relationship between the structures Of these compounds and their biological activity is reviewed. A brief introduction to the sexual biology of tbe false codling …
-
Isolation and characterization of the female sex pheromone of the sugar beet cyst nematode, heterodera schachtii, and an analysis of male precopulatory behaviour /
… increase in crop yield. The H. schachtii female sex pheromone, which attracts homospecific males, was collected in an aqueous medium and isolated using high performance liquid chromatography. Characterization of the male-attractive material revealed that it was heat stable and water soluble. The …
-
Evidence for the Sensory Receptor(s) of the Mounting Sex Pheromone in Two Species of Ixodid Ticks, <i>Dermacentor variabilis</i> (Say) and <i>Dermacentor andersoni</i> Stiles
… to be the receptors of the female contact sex pheromone, MSP (mounting sex pheromone), in <em>D. variabilis</em>, <em>D. andersoni</em> and<em> A. americanum</em> male ticks. In all three tick species, the claw sensilla consists of six anteriorly-directed setae arranged in three symmetrical …
-
Evidence for the Role of Ecdysteroids in the Genital Sex Pheromone of Two species of Hard Ticks, <i>Dermacentor variabilis</i> (Say) and <i>Dermacentor andersoni</i> Stiles
… females, suggesting the presence of a genital sex pheromone (GSP). Similar extracts from unfed females did not restore the behavior, suggesting that the pheromone was produced during feeding. Perception of the GSP by sensillae on the male cheliceral digits was confirmed by electrophysiological …
-
Investigations into insect chemistry
… governed by chemical stimuli.</p> <p>The name “pheromone” is derived from the Greek <em>pherein</em> (to bear, transmit) and <em>hormon</em> (impel, excite). Karlson and Butenandt, in 1959, proposed the term “pheromone” for “substances which are secreted to the outside by an individual and …
-
Ecological and behavioral factors associated with monitoring and managing pink hibiscus mealybug (Hemiptera: Pseudococcidae) in the southern US
… evaluation of management tactics, and the use of sex pheromone based monitoring in southern Florida from 2005 to 2008. Understanding the ability of PHM to locate and colonize new hosts, and the response of hosts is essential to optimized monitoring and management strategies. Investigation of the …
-
Chemical Ecology of Clytini (Coleoptera: Cerambycidae)
In chapter six, I characterize the contact sex pheromone of N. a. acuminatus. Males recognize female conspecifics only after contacting them with their antennae. I characterize the behavior and demonstrate that three methylalkanes present in the wax layer of females are sufficient to elicit a …
-
Mating disruption in apple orchards: dispenser release rates, generic blends and community impact
… the normal type. The effect of other species' sex pheromone blends and generic blends upon the mating behavior of Platynota flavedana Clemens, Platynota idaeusalis (Walker), Argyrotaenia velutinana (Walker) and Choristoneura rosaceana (Harris) was studied using small plots. It was determined …
-
Chemical communication and its ecological consequence in the Lysmata shrimp
… successfully. Mate recognition depends mainly on sex pheromones, which are detected by antennae and antennules. Distance (soluble)pheromone mediates mating behaviour of some decapod crustaceans. Contact pheromone (an insoluble coating on the body surface) has been proposed but not confirmed to be …
-
Surveillance of grape berry moth, Paralobesia viteana Clemens (Lepidoptera: Tortricidae), in Virginia vineyards
My research addressed pheromone lure design and the activity of the grape berry moth, Paralobesia viteana, flight and infestation across three years of study. In my lure evaluations, I found all commercial lures contained impurities and inconsistencies that have implications for management. First, …
-
Communication in the hymenoptera : chemistry, ecology and evolution
… that are designed to attract females. The sex pheromone of male European beewolves Philanthus triangulum (Hymenoptera, Crabronidae) might have evolved according to the sensory exploitation hypothesis. A three-step scenario is supported by our studies. First, a major component of the …
-
A sexually dimorphic circuit switch in higher olfactory centres
A sexually dimorphic circuit switch in higher olfactory centres In Drosophila the male sex pheromone cis-vaccenyl acetate (cVA) elicits different behaviours in males and females: while males are repelled by cVA, it stimulates female receptivity. However, olfactory receptor neurons and their …
-
Impacts of ocean acidification on fitness and chemical communication in a model marine invertebrate, Nereis succinea
… typical behavioural response of males to female sex pheromone, cysteine-glutathione disulfide (CSSG), was also impacted by culture in acidic conditions (pH 7.8, 4-6 months) with fewer males eliciting expected sexual behaviours and males also requiring a higher dose of pheromone to release gametes …
-
Development of environmental water monitors based on hydrostatic and flourescence detection techniques
… was chosen as a model analyte, associated with a sex pheromone and prior to the onset of spawning may be found in high concentrations. The system that has been developed is capable of selectively sensing glutathione to below 10 μM. However, the threshold concentration in the proximity of its …
Page 1 of 2