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.
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Showing 1 to 20 of 24 for “"Reproductive behaviors"”.
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Reproductive Behaviors of Male and Female Blackspotted Topminnows, <i>Fundulus olivaceus</i>
<p>The aim of the study was to characterize the reproductive behaviors of male and female blackspotted topminnows in the Pascagoula Drainage. I focused on phenotypic traits, size and number of dorsolateral spots, in males that possibly could cue a female to choose one male more frequently than …
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The Agonistic and Reproductive Behaviors of the Gulf Killifish, Fundulus grandis and Their Physiological Components.
… pairs were observed for agonistic and reproductive behaviors, diel rhythms of behavior, endogenous hormone levels (testosterone for males; estrogens for females), and male coloration frequencies.In male-male pairs, dominance was quickly established and was not reversed. The dominant …
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Role of 11-ketotestosterone, testosterone, and prolactin in the expression of reproductive behaviors by male bluegill
… the role of hormones in the expression of reproductive behaviors among male bluegill. The first experiment determined the association of 11-ketotestosterone (11KT) and testosterone (T), two important androgen hormones regulating reproduction in teleost fish, with reproduction in both types …
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The nervous system of plant-parasitic nematodes and their behaviors
… the neurotransmitter serotonin regulates their behaviors. Neurotransmitters are endogenous molecules used by neurons for signal transmission. Serotonin regulates feeding and reproductive behaviors in C. elegans, but its role in plant-parasitic nematodes remains unknown. In the root-lesion …
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The evolution and benefits of nest association and other reproductive strategies in North American minnows (Cyprinidae)
… histories of North American minnows, including reproductive behavior. In order to promote understanding of the evolution, behavior and ecology of minnows, a list of minnows for which reproductive behaviors are known was compiled. These behaviors were classified so that the evolution and adaptive …
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Effects of Gestational and Lactational Exposure to 2,3,7,8-Tetrachlorodibenzo-P-Dioxin or Coplanar PCBs on Reproductive Development and Sexually Dimorphic Behaviors in Rats
In contrast sexually dimorphic non-reproductive behaviors were affected in TCDD and coplanar PCB exposed rats. In the initial study, the play behavior in TCDD exposed rats was suppressed. However in the follow-up study, when play behavior was tested with a different protocol than in the initial …
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Effects of urbanization on the physiology, behavior, and fitness of a wild songbird
… this aggressive signaling is constraining other reproductive behaviors such as maternal care. Indeed, female song sparrows, like males, expressed increased aggressive signaling compared to rural, suggesting urban habitats may favor a more aggressive phenotype. Finally, in Chapter 3, I …
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Analysis of courtship behaviors of the desert tortoise, Gopherus agassizii
… 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 females. I calculated duration of three courtship phases (trailing, subduing, and mounting) and quantified the number …
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The Effect of Centrally Administered D-Alanine-Methionine-Enkephalinamide (Dala) on the Copulatory Behavior of Male Hamsters
… suppressed the DALA inhibitory effect on these reproductive behaviors.
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Age Effects on Social and Investigative Behaviors in a Closed Population of African Elephants
… to explain the development of social and reproductive behaviors. The reproductive hypothesis states that behaviors change around the time when an individual begins successfully reproducing, while the social dominance hypothesis states that behaviors change throughout the life of an …
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Information Interventions to Reduce Maternal Mortality in Indonesia
… risk of death in childbirth can change women’s reproductive behaviors. In the first two chapters, I use the Maternal Mortality Module from the Demographic and Health Survey (DHS) in Indonesia to examine fertility and reproductive behavior responses to a sister’s death in childbirth. Fertility …
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Malthus travels: A cultural history of the population crisis, 1945-1995
… technology"" dedicated to policing reproductive behaviors. As a cultural history, this study will analyze how the population crisis, as a policy formation, problematized and publicized the habits, morals and manners of specific populations in order to regulate population growth. This …
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Factors influencing the space use of a nonhunted population of eastern wild turkeys
… the contiguous United States hunted during their reproductive season, however, there are many aspects of male reproductive ecology that are not well understand. Because male wild turkeys use a polygynous-promiscuous mating system and do not participate in nesting or brood-rearing, wild turkey …
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Estudo da evolução dos padrões de comportamento reprodutivo de Cynolebiatini (Cyprinodontiformes - Rivulidae)
The reproductive behaviors of nineteen species of the Cynolebiatini are described in this study. The obtained data added to the literature data plus personal communications provided some ethological patterns. These patterns were optimized through strong phylogenetic trees based principally on …
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NUCLEAR PROGESTIN RECEPTOR REGULATES FERTILITY AND SPAWNING IN FEMALE CICHLID ASTATOTILAPIA BURTONI
… and how to behave is important for maximizing reproductive fitness. In the cyclical female reproductive system, reproductive state and behaviors are synchronized through hormones. However, the mechanisms underlying this synchronization are not well understood. I utilize gene editing in the …
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Assessing anthropogenic noise impacts and relevant soundscape cues for marine invertebrates: leveraging squid and coral reefs as model systems
… noise exposure had no significant effects on reproductive behaviors of groups of D. pealeii, indicating high motivation of these squid to reproduce during this stressor. Collectively, these experiments revealed the importance of considering behavioral context in studies and regulatory …
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Ultrasonic Communication and the Hormonal Modulation of Aggressive Behavior in the Female Hamster
… signals for the initiation and coordination of reproductive behavior. In this regard, the studies detailed here show that hamsters of both sexes emit ultrasonic calls of 16-64 kHz and roughly 50 dB SPL. Ultrasounds by females encode information regarding reproductive state as well as location. …
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Assessing anthropogenic noise impacts and relevant soundscape cues for marine invertebrates: leveraging squid and coral reefs as model systems
… noise exposure had no significant effects on reproductive behaviors of groups of D. pealeii, indicating high motivation of these squid to reproduce during this stressor. Collectively, these experiments revealed the importance of considering behavioral context in studies and regulatory …
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An integrative analysis of the multi- and transgenerational effects of endocrine-disrupting chemicals on behavior and neurobiology
… and involved in the regulation of reproductive behaviors. These results did not parallel our behavioral findings from the previous chapter, since F2 males descended from the paternal lineage were most vulnerable to VIN exposure. Finally, we investigated whether ancestral EDC …
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Reproductive Resilience of Aedes Aegypti Mosquitoes
… molecular adaptations have evolved to ensure the reproductive flexibility and resilience of this species when they are faced with intense droughts and changing climates? Here we show that the reproductive behaviors of adult Aedes aegypti females are tightly interconnected and centered on precise …
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