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 16 of 16 for “"gonad development"”.
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The role of the Fused toes locus containing Iroquois homeobox gene 3, 5, and 6 and Ftm, Fto, and Fts during ovary and testis development in mice
… genes: Fto, Fts, and Ftm, during male and female gonad development. Ft mutant mice are missing Ft locus genes whose function is unknown during male and female gonad development. These six missing genes show stage and sex specific expression patterns during sex determination and differentiation in …
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Growth and the energy budget of juveniles of the abalone Haliotis tuberculata (L.)
… as a sole food, is not sufficient for successful development and growth of early juvenile abalone. However, marine diatoms such as Skeletonema costatum, Navicula ramosissima and Cylindrotheca closterium were easily ingested and assimilated depending on the size of the animal and conditions of …
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Ecophysiology of the black mussel Choromytilus meridionalis (Krauss)
… Bay, South Africa. The reproductive season and gonad development is described from monthly measurements made over a period of 4 years. Spawning usually extends from July to February and is characterised by peaks of gamete release interspersed with regeneration of the gonad. Individual fecundity …
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The Effects of Temperature on the Physiology of PHATARIA UNIFASCIALIS : and its Implications for the Species' Distribution in the Gulf of California
… had similar indices of pyloric caeca and gonad development, the population at Loreto was distinctly separated by depth into a shallow reproducing population and a deeper feeding population. No such distinct reproducing population was found at the Bay of LA. In addition, the Bay of LA …
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The Evolution of Organ Shape : Distal Tip Cell Migration and Gonadogenesis in Nematodes
… mechanisms involved in the evolution and development of organ morphology. We compare gonad development in two closely related nematode species, Pristionchus pacificus and Caenorhabditis elegans to address how a tube can change shape. The hermaphrodite gonad in each of these species …
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Dietary Influence on Reproductive Development in Female Largemouth Bass, Micropterus Salmoides
Dietary influence on reproductive development in female largemouth bass, Micropterus Salmoides, was investigated. Female bass were raised on either a pelleted diet or a forage diet of goldfish, Carassius auratus. Dietary levels of testosterone (T) and estradiol-178 (E2) were measured to determine …
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The effects of Didemnum vexillum overgrowth on Mytilus edulis biology and ecology
… of the experiment. The pattern of spawning and gonad development was reversed in overgrown male mussels from the control mussels. Predation studies showed a potential positive effect for the mussel, as crabs consumed more control mussels than overgrown mussels in both a choice study and a …
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Fish Ladders Designed for Drop Culverts and Central Stoneroller Ecology Across a Latitudinal Gradient
… lower in the southern latitude. Peak gonad development occurred later in the north than in the south; stoneroller peak gonadal somatic index (GSI) in Mississippi was 21% on day 65, whereas South Dakota GSI peaked at 15% on day 134. These results indicate that Central Stoneroller …
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Establishing the role of RNF4 in the vertebrate DNA damage response
… gene and is highly expressed in the adult gonads. In the ovaries, RNF4 expression was restricted to the early stage oocytes, suggesting a possible role in oocyte development. Loss-of-function studies in Danio rerio were performed using morpholino knockdown and zinc-finger knockout …
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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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What is driving the range extension of Gibbula umbilicalis (Gastropda, Trochidae) in the eastern English Channel?.
… to determine whether: I. reproductive development and spawning was synchronised between different populations, and whether it was correlated to sea temperature; II. there was evidence of recent recruitment at the ―new‖ sites and if there was a difference in population structure at each …
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Effects of exposure to 17α-ethynylestradiol during larval development on the African clawed frog (Xenopus laevis) and the wood frog (Rana sylvatica)
… during the larval period on the sexual development, growth, metamorphosis, and transcriptional profiles of the African clawed frog (Xenopus laevis) and the wood frog (Rana sylvatica). To do so, X. laevis were exposed to 0.09, 0.84, or 8.81 µg EE2/L throughout the larval period and early …
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A Census of Human RNA-Binding Proteins and Characterization of the DEDDh RNA Exonuclease NEF-sp in the 3' End Maturation of 28S Ribosomal RNA
… expression. Coregulated gene expression during developmental processes often gives novel insights into regulatory pathways and components. Furthermore, I showed that by classifying RBPs into their main regulatory RNA pathways we can start to understand the disease phenotypes of proteins involved …
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Morphogenesis and Female Fate Determination in Vertebrates
<p>A unique feature of the fetal gonad is its ability to form two distinct organs, the testis and the ovary, from a single bipotential primordium. The outcome of this decision, which is made by a population of somatic cells known as the bipotential supporting cell precursors, determines whether an …
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Pismo Clams (Tivela stultorum) in Califorina: Population Status, Habitat Associations, Reproduction, and Growth
… within a single study to describe the sex ratio, gonad development stages, body condition index, and length at sexual maturity. Further, we examine age-length relationships across California to provide estimates of age structure and growth rate, which will better inform recovery timelines for the …
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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 …