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 “"ovarian development"”.
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A Standardized Ultrasonography Classification for Channel Catfish Ovarian Development
… Center Aquaculture Research Station. The development of a standardized and systematic approach to interpretation of ultrasound images emphasized the interplay of technical and biological aspects of ultrasonography assessments. This showed the importance of the control settings and …
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Effects of Diet on Ovarian Development in Largemouth Bass, Micropterus Salmoides
… energy than forage diet required for enhanced ovarian development.
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GATA Like Protein-1: A Somatic Cell Factor Required for Normal Ovarian Development and Function
… tissues. Deviations in the cross talk between ovarian cells, or aberrant gene expression within one of the cell populations, can lead to germ cell loss and infertility in the adult female. Expression of Glp-1 in the somatic cells of the ovary is required for normal fertility in female mice, as …
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Neuroendocrine Mechanisms Involved in the Control of Ovarian Development and Vitellogenesis in the Rainbow Trout
… mechanisms that control vitellogenesis and ovarian development in the female rainbow trout. Fluorometric, electrophoretic and chromatographic techniques and radioimmunoassay were used to determine serum levels of oestrone, oestradiol-17B, testosterone, vitellogenin and calcium and these …
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Desert Hedgehog is a Mammal-Specific Gene Expressed During Testicular and Ovarian Development in a Marsupial
… is an essential morphogen for normal testicular development and function in both mice and humans but is not present in the avian lineage. Like other hedgehog proteins, DHH signals through the patched (PTCH) receptors 1 and 2. Here we examine the expression and protein distribution of DHH, PTCH1 …
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The Environmental Control of Reproduction in the Female Dace, Leuciscus leuciscus
… 3) the effect of artificial light treatments on ovarian development and 4) the measurement of serum melatonin levels under different photoperiod regimes. Ovarian development was monitored by endocrinological data, notably serum cycles of 17-oestradiol (E2), testosterone (T), and calcium (as an …
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Adamts9 is critical for the development of primary ovarian follicles
… highly evolutionarily conserved and critical for development in vertebrates. Knockouts of ADAMTS9 in mice and AdamTS-A in Drosophila melanogaster are embryonic lethal; and abnormal ADAMTS9 activity has also been linked to various human disorders including ovarian and uterine disease. Our previous …
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Characteristics of dominance: behaviours and hormones in a facultatively social bee species (Xylocopa virginica)
… methoprene, to determine whether it increases ovarian development in this species, as it does in other Hymenoptera. Increased dose of methoprene lead to increased ovarian development in X. virginica, making treated individuals better able to lay eggs and therefore to take advantage of being in …
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The role of beta-catenin in the development of fetal ovary and female germ cells
Ovarian development in mammals is considered as a default process, arising only in the absence of Sry, a testis-determining gene. However, current evidence has suggested the presence of an active pathway in fetal ovary. In particular, gene screening experiments have shown that many genes are …
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RNA interference of worker sterility genes: Testing mechanisms of reproductive regulation in Apis mellifera
… treatments caused a significant impact on the ovarian development of the worker bees. Future studies would need to confirm that this is due to that fact that the gene was knocked down.
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Sex Determination And Differentiation In The Common Snapping Turtle - A Reptile With Temperature-Dependent Sex Determination
… that transduces a signal for ovary or testis development is not known in any species. Furthermore, it is well established that sex steroid hormones, androgens and estrogens, are important for sex determination and differentiation in TSD species. Yet, the role of androgens in these processes is …
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Morphogenesis and Female Fate Determination in Vertebrates
… determination in vertebrates, the intricacies of ovarian morphogenesis are not well understood. A key event in ovarian development occurs around birth, when meiotic germ cells and somatic granulosa cells organize into primordial follicles, the structures that generate mature oocytes for ovulation …
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CHARACTERIZING ECDYSTEROID TITER PROFILES AND THE FUNCTIONAL ROLE OF ECDYSTEROIDS IN ADULT WORKER HONEY BEES (APIS MELLIFERA)
… in the absence of morphological signs of ovarian development, and that queen mandibular pheromone (QMP) regulation of ecdysteroid production is dependent upon social context. Additionally I explored novel roles of ecdysteroids in behavior and physiology. Comparison of observations in the …
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Exotic Armored Catfishes in Texas: Reproductive Biology, and Effects of Foraging on Egg Survival of Native Fishes (Etheostoma fonticola, Endangered and Dionda diaboli, Threatened)
… suggesting a modified group-synchronous mode of ovarian development. Potentially deleterious effects of Hypostomus foraging on Devils River minnow and fountain darter eggs were assessed experimentally to evaluate the threat to these native species. The survival rate for fountain darter eggs was …
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Prevalence of Premature Ovarian Failure In Women With Tuberous Sclerosis
… cause most cases of TSC. Recently, the use of ovarian specific conditional knock-out mouse models has demonstrated a crucial role of the TSC genes in ovarian function. Mice with complete deletion of <em>Tsc1</em> or <em>Tsc2</em> showed accelerated ovarian follicle activation and subsequent …
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A Re-examination of Reproductive Arrest in the Monarch Butterfly, Danaus plexippus.
… controlled growth chambers. Oocyte presence and ovarian development score were used to determine reproductive status. The mean number of mature oocytes was dependent on temperature. Females exposed to a mean temperature of 15°C failed to develop mature oocytes during the course of the experiment. …
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Endocrine control of fat body composition and effects of the insect growth regulators methoprene and pyriproxyfen on the development and reproduction of the Argentinian cockroach, Blaptica dubia Serville (Blattaria: Blaberidae)
… related with the reproductive processes of ovarian growth, ootheca formation, ootheca deposition, and hatching of the nymphs. The biochemical composition of the fat body was analyzed and revealed the storage lipids as main constituents, followed by glycogen, proteins and free carbohydrates. …
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Molecular Mechanisms Regulating Neonatal Oocyte Survival and Primordial Follicle Formation in the Mouse Ovary
… nor abrogation significantly altered ovarian histology. Another BCL2 family protein, MCL1, is expressed in human oocytes during ovarian development, suggesting a role for MCL1 in oocyte survival. We found that MCL1 was localized to both oocytes and somatic cells during cyst breakdown. …
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Reproduction management in female Lynx (Lynx lynx)
Lynxes undergo a non-cat like ovarian cycle. Before conducting the studies contained in this thesis, hardly anything of the cycle was fully understood. Concerning conservation aspects, it was important to understand how luteogenesis functions and if it could be manipulated artificially to increase …
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Management and nutrition of the replacement gilt.
… (acute) term moderate dietary restriction on ovarian development and oocyte developmental competence in 161- and 175- day old, pre-pubertal gilts. Both chronic and acute periods of moderate feed restriction reduced the number of medium follicles present on the ovaries of 161- and 175-day old …
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