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 300 for “"life stages"”.
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Bone health and physical activity through the various life stages
… activity and bone health through various life stages, in order to better understand the determinants of adult bone mass and consequently, osteoporosis. All the studies have been carried out on the various ethnic groups that make up the population of South Africa, with widely divergent …
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EFFECTS OF ANTIMICROBIAL COMPOUNDS ON EARLY LIFE STAGES OF CANADIAN FISH SPECIES
… MIT) antimicrobial compounds to early-life stages (ELS) of three freshwater fish species: rainbow trout (Oncorhynchus mykiss), lake trout (Salvelinus namaycush), and white sucker (Catostomus commersonii). The overarching goal was to characterize species-specific responses to these …
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EFFECTS OF ANTIMICROBIAL COMPOUNDS ON EARLY LIFE STAGES OF CANADIAN FISH SPECIES
… MIT) antimicrobial compounds to early-life stages (ELS) of three freshwater fish species: rainbow trout (Oncorhynchus mykiss), lake trout (Salvelinus namaycush), and white sucker (Catostomus commersonii). The overarching goal was to characterize species-specific responses to these …
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Sensitivity of early life stages of freshwater mussels (Bivalvia: Unionidae) to copper
Four life stages of freshwater mussels were tested for their sensitivity to copper and a metal-containing effluent. This permitted an assessment of the variability in sensitivity among the life stages in order to identify those stages most threatened in the wild from copper exposure. Glochidia, …
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Population dynamics of overwintering life stages of the alfalfa weevil, Hypera postica (Gyllenhal)
… on population dynamics of overwintering stages of this insect. Sixteen commercial alfalfa fields in Montgomery Co. (elevation 610 m) and Bedford Co. (elevation 300 m) were used in the study. Approximately half the fields each year were either harvested or grazed to remove fall regrowth. …
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Recruitment of Bluegill and Yellow Perch in Nebraska Sandhills Lakes: Integrating Multiple Life Stages
… the fish communities. I conducted a multiple life-stage investigation of bluegill and yellow perch recruitment in Nebraska Sandhills lakes. I focused on four topics, 1) the effect of climate on year-class strength of multiple populations broadly across a series of Nebraska Sandhills lakes, 2) …
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Predictors Of Sexual Assertiveness In Women: A Comparative Study Of Women During Different Life-Stages
… that could be used for women across the adult life span, 2) to better understand the predictors of specific dimensions of sexual assertiveness, 3) to investigate differences in the dimensions of sexual assertiveness across age groups, and 4) to examine how the predictors of sexual assertiveness …
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Assessing the impact of domoic acid exposure on the zebrafish (Danio rerio) brain across life stages
… and can affect the health of humans and wildlife. DA is a structural analog of glutamate - an excitatory neurotransmitter - that activates ionotropic glutamate receptors leading to excitotoxicity and ultimately neurobehavioral defects. While current seafood regulations prevent acute toxicity …
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Native New Zealand fish: lethal and sublethal effects of pentachlorophenol on early and adult life stages
… studied. For one part of the study, four early life stages of smelt (Retropinna retropinna), inanga (Galaxias maculatus), koaro (Galaxias brevipinnis), and common bully (Gobiomorphus cotidianus) were exposed to pentachlorophenol, and the acute and sublethal responses were compared to those of …
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The Effects of Amphetamine Exposure on Neurodevelopment and Behavior in Early Life Stages of Danio Rerio
<p>Amphetamines are frequently prescribed to young children for attention deficit hyperactivity disorder (ADHD). Due to the recent rise in ADHD diagnoses and the resulting increase in amphetamine intake in children, we investigated how amphetamine exposure impacts the development of stereotyped …
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Evaluating Restoration Potential of an Endangered Legume, Baptisia Arachnifera: Shade & Litter Effects on Early Life Stages
… past 20 years. Therefore I examined the early life stages of the species for weevil predation, fungus infection, and germination; information used to help prevent the species extinction. Seed pods of Baptisia arachnifera from six sites were examined for weevil predation and fungal infestation. …
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Gender Differences and Similarities in the Work-family Interface: The Importance of Considering Family Life Stages
… the interaction between gender and family life stages to properly understand gender similarities and differences in the work and family interface. Data for this study come from the IBM 2004 Global Work and Life Issues Survey representing 79 countries (N=41,813). This study is a first step …
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The assessment of the contamination of soil-transmitted helminth life stages in the environment and under fingernails
… are transmitted through contact with infectious stages in the environment (often soil, which refers to their common name). The STH species that predominantly infect humans are Ascaris lumbricoides Trichuris trichiura and the hookworms (Necator americanus and Ancylostoma duodenale). STHs pose an …
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Investigating the trophic ecologies of early life stages of small pelagic fishes in the Benguela upwelling ecosystem
… mortality rates. Therefore, examining early life traits that may explain a fraction of this mortality could be fundamental to understanding the underlying mechanics of recruitment. This study seeks to investigate the ontogenetic development in morphology and trophic ecology of early life …
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The effects of periodic environmental enrichment at different life stages on the welfare and production of growing pigs
… the interaction between enrichment and different life stages is largely understudied. The current study evaluated the influence of periodic enrichment during different life stages on welfare and production in growing pigs. A total of 240 pigs were housed in either Control (C) or Enriched (E) …
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Creation of family capital through life stages for middle income families in the context of the Irish holiday.
… in the creation of family capital through life stages for middle income families, in the context of the Irish holiday was investigated. Within a social constructivist paradigm, a whole-family research methodology was adopted to investigate the family holiday. Semi-structured interviews were …
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Ontogenetic Changes and Environmental Hypoxia: Responses of Two Fish Species to Low Oxygen Concentrations at Early Life Stages
… more tolerant of hypoxic conditions than larval stages, there is little information to support this assumption. To determine whether reduced concentrations of dissolved oxygen (DO) affect fishes differently during various early life stages, I examined the responses of two species of fish (fathead …
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Toxicity of zinc, copper, and sediments to early life stages of freshwater mussels in the Powell River, Virginia
… temperature, length of exposure, species, and lifestage were determined. Additionally, the effects of Powell River sediment on survival and growth of juvenile mussels were evaluated. The Cumberland moccasin shell (Wedionidus conradicus) was the most sensitive species tested, with 24-hr and …
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Predicting how the juvenile life-stages of anadromous Atlantic salmon Salmo salar influence their migration phenology and marine survival.
… as well as other important aspects of their life cycle, such as growth rates and migration phenology, is crucially important. Salmon are an anadromous species that undertake a marine migration from freshwater to oceanic feeding grounds, returning as mature adults to their natal river to …
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