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Showing 1 to 20 of 20 for “"courtship behavior"”.
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Songs and courtship behavior of male humpback whales (megaptera novaeangliae) in the North Atlantic
During the breeding season, male humpback whales sing long, complex songs. The function of singing is unknown. As a display, however, it may be expected to convey something of the status or quality of the individual. Here I present a hypothesis for how singing might allow a listener to assess the …
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Analysis of courtship behaviors of the desert tortoise, Gopherus agassizii
General descriptions of courtship behavior have been published for the desert tortoise, Gopherus agassizii. However, the amount and sources of variation in courtship behaviors have not been documented. I examined courtship behavior by analyzing videotaped interactions between captive males and …
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Identification and Characterization of Sex-Specific Transcripts in the Blood-Brain Barrier of Drosophila melanogaster
… stereotypic acts in courting a female. This behavior is mainly controlled by male specific transcription factors that define male neuronal circuits inside the brain. In our lab, we have shown that male factors which are secreted outside of the CNS are also required for normal mating behavior. …
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Characterization Of Neuronal Groups Regulating Sexual And Agonistic Behavior In Male Chicken (Gallus Gallus)
… neuronal regulation of male sexual and agonistic behavior in broiler breeders. First, brain structures associated with sexual and agonistic behavior were identified by mapping Fos expression. The ventromedial subnucleus of medial portion of bed nucleus of the stria teriminalis (BSTM2) was …
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Natural Variation and Gene Expression in the Male Courtship Progression of Drosophila Melanogaster
… variation in the temporal sequence of male courtship behavior can be one target of selection. The goals of this research were to identify variation in the sequence of male behavior using a natural population, and investigate the genetic underpinnings of this variation. A new, high-throughput …
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Characterization of the pleiotropic effects of the Drosophila gene mushroom body miniature B
… not manifested during embryonic development; Courtship behavior assays and immunohistochemical techniques were used to investigate causes of mbmB female sterility. Courtship involving mbmB females is delayed and reduced in total amount relative to that of wild type. Additional data presented …
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Investigation of pre- and post-zygotic reproductive barriers between two host-plant complex races of the parasitic wasp Cotesia congregata (Say) [Hymenoptera: Braconidae]
… to female pheromones, elements of male acoustic courtship signals, and breeding success between the two races. Males responded to pheromones from both sources and male courtship signals showed only subtle differences, suggesting that factors other than courtship behavior may be involved in …
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Comportamento reprodutivo de Phyllomedusa rohdei Mertens, 1926 (Amphibia, Anura, Hylidae), na região de Saquarema, Estado do Rio de Janeiro, Sudeste do Brasil
… in places with oviposition sites. During the courtship behavior, males call and patrol the area in search of females. Females did not choose mates and the sexual selection results from male-male competition.
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The effect of female mate preference on the evolution of Batesian mimicry
… were released in pairs in a flight cage to study courtship behavior and mate choice. The study was designed to test the hypothesis that females select the natural color pattern, an important aspect of the theory of the evolution of mimicry. Males were unpainted or were painted either yellow as a …
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Mounting Sex Pheromone: A Novel Pheromone Responsible for Mate Recognition in the Ixodidae
… of three sex pheromones guiding the hierarchy of behavioral responses which constitute tick courtship behavior. Tests with <em>D. variabilis</em> and <em>D. andersoni</em> showed that this pheromone could be removed from and replaced on the surface of female ticks as well as transferred to …
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Genetic analysis of synaptogyrin function in the synaptic vesicle cycle
… and have no overt deficits in motor function or courtship behavior. Ultrastructural analysis of mutant larvae revealed an increase in average synaptic vesicle diameter as well as enhanced variability in the size of synaptic vesicles. In addition, the resolution of endocytic cisternae into …
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The biology of a population of all-female salamanders of the ambystoma jeffersonianum complex in East-Central Indiana
… has evolved a method of reproduction in which no courtship occurs and no spermatophores are picked up. Apparently, however, these A. tremblayi females do require the presence of male A. texanum, a more distantly related ambystomatid, in order to deposit viable eggs.A - maculatum, A. texanum, A. …
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Regulation of Behavioral Plasticity: Mechanism Underlying Olfaction-Dependent Changes in Male Specific Courtship Behaviors in Drosophila melanogaster
<p> Animal behaviors consists of both innate and plastic components. Hardwired neural circuits are established during development and confer animals the innate potential to solve the survival challenges. However, in an ever-changing environment, animals need to modify their behaviors constantly and …
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Neural Circuit Mechanisms Underlying Behavioral Evolution in Drosophila
<p>Courtship rituals serve to reinforce reproductive barriers between closely related species. Several species in the Drosophila melanogaster subgroup exhibit pre-mating isolation due, in part, to the fact that D. melanogaster females produce 7,11-heptacosadiene (7,11-HD), a pheromone that promotes …
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Behavioral and Hormonal Flexibility Across Light Environments in Guppies (Poecilia reticulata)
<p>Behavior may be dramatically influenced by changing environments, and differences in light intensity environments may have important behavioral consequences. One approach to understanding changes in behavior is by studying behavioral syndromes, suites of correlated behaviors reflecting between …
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Strain Variation as a Window Into the Neural Logic of Drosophila Mate Choice
<p>Drosophila males perform robust, stereo typed courtship routines which have been studied for over a century to understand the genetic and neural underpinnings of flexible, hard-wired behavior. Courtship–particularly on the crowded wild food patches where flies congregate to mate–is a dynamic …
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Connecting Female Mating Decisions and Male Courtship Strategies in Drosophila
<p>In many species, males have evolved elaborate behavioral patterns to attract females or repel rival males. The neural mechanisms mediating these male behavioral traits and how females use them to guide their mating decisions remain elusive. In this thesis,I present our efforts to uncover the …
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The Internal Orchestration of a Courtship Ritual in Drosophila
<p>The diversity of behaviors exhibited by animals is astounding. Even within a species, members constantly select between a myriad of ways to interact with their environment, ranging from foraging to fighting. Yet, why an individual behaves as it does in each moment of time typically remains …
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Abdominal-B Neurons Control Drosophila Virgin Female Receptivity
… a duet of stereotyped, sexually dimorphic courtship behaviors, a suite of sensory back-and-forth that offers an excellent model for studying the neural circuitry of complex behavior (Dickson, 2008). However, the study of Drosophila courtship has focused overwhelmingly on the male, and …
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From Hormones to Genomes: Investigating Testosterone, Social Behavior, and Evolution In Manakins
… environment. This dissertation investigated the behavioral biology of manakins (Aves: Pipridae), neotropical birds notable for their unique polygynous breeding system. In Chapter I, I introduced the relationship between hormones, fitness, and behavior exploring the Cort-Fitness Hypothesis and the …