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Showing 1 to 20 of 52 for “"Lamprey"”.
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Transcriptome Analysis of Sea Lamprey Embryogenesis
<p>The sea lamprey (<em>Petromyzon marinus</em>) has survived throughout evolution for hundreds of millions of years. It is considered an invasive species to the Great Lakes that has caused dramatic changes in the ecosystem for fish communities resulting in the collapse of a fishing industry that …
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A Lamprey Gonadotropin-releasing Hormone in the Bovine Brain
… been isolated in various animals; of these, the lamprey-gonadotropin-releasing hormone-IH (lampreyGnRH-IH) analog seems the most likely candidate as a possible independent FSHRF in the mammalian system. On the basis of these studies, I hypothesized that lamprey-GhRH-III may be a FSHRF in mammals, …
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Behavioral Response of Pacific Lamprey (Entosphenus tridentatus) to Predator Odors
Pacific lamprey (<em>Entosphenus tridentatus</em>), a species facing serious threats to their existence, experience a number of challenges in reaching their desired spawning grounds during the adult migratory phase, and predators are suspected to be one of these challenges. Understanding if Pacific …
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Organization of brain and spinal cord locomotor networks in larval lamprey
… study, in semi-intact preparations from larval lamprey, stimulation in brain locomotor areas evokes swimming. In in vitro preparations, brain locomotor areas are confined to discrete areas of the brain and their pharmacology is similar to that of other vertebrates. These results suggest that the …
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Volumetric analysis of lamprey hydrodynamics using synthetic aperture particle image velocimetry
An experimental procedure to study lamprey hydrodynamics using Synthetic Aperture Particle Image Velocimetry (SAPIV) was developed and applied in this thesis. Volumetric, time-resolved flow field analysis of freely swimming lamprey, Petromyzon marinus, are presented from SAPIV experiments. As the …
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Glutamate regulates neurite outgrowth of descending neurons in culture from larval lamprey
In spinal cord-transected larval lamprey, descending brain neurons, most of which are reticulospinal (RS) neurons, regenerate their axons across a transection site and contribute to behavioral recovery. In the present study, DiI-labeled descending brain neurons in larval lamprey were dissociated …
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On the neuroendocrine regulation of reproduction: Functional characterization and kinetic studies of the lamprey gonadotropin -releasing hormone receptor and cloning and analysis of the cDNA encoding lamprey gonadotropin-releasing hormone-III
… physiology has led scientists to study the lamprey, a member of the oldest extant class of vertebrates, the agnathans. The studies presented herein contribute to the field of reproductive neuroendocrinology through developing our understanding of ancestral, or ancestral-like characteristics …
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Topological organization of the trigeminal system in the lamprey and restoration following axonal regeneration
… systems of lower vertebrates, such as the lamprey, share many of the basic features of the brain and spinal cord of higher vertebrates. However, unlike humans and other higher vertebrates, the lamprey displays robust axonal regeneration in the central nervous system following neural …
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Distribution and Ecological Function of Pacific Lamprey in the San Luis Obispo Creek Watershed
<p>Pacific lamprey (<em>Entosphenus tridentatus</em>) is an endemic species to coastal watersheds along the Pacific Rim in North America and Asia. The species' geographic distribution is retracting and has not been mapped precisely, and the ability for the species to provide ecosystem services, …
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An Ecological Comparison Between Resource Subsidies: Pacific Lamprey (<i>Entosphenus tridentatus</i>) and Pacific Salmon (<i>Oncorhynchus</i> spp.)
… other anadromous fish species such as Pacific lamprey (<em>Entosphenus tridentatus</em>). Both Pacific salmon and Pacific lamprey are culturally important to PNW tribes for ceremonial, medicinal, and subsistence purposes, and have been since time immemorial. Unfortunately, both salmon and …
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Understanding the impacts of exploitation and fragmentation on the upstream migrating, adult river lamprey (Lampetra fluviatilis [L.]): implications for conservation
… there is a dearth of knowledge of river lamprey migration in the Humber catchment, one of the UKs largest river lamprey populations and home to the main English lamprey fishery. Consequently, this study aimed to improve our understanding of the impact of fragmentation and exploitation on …
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Gonadotropin releasing hormone in agnathans
<p>Hagfish and lampreys are the only two representatives of Agnathans among extant vertebrates. The regulatory hypothalamic neurohormone, gonadotropin-releasing hormone (GnRH), regulates reproduction in all vertebrates through the hypothalamic-pituitary-gonadal axis. Most vertebrates have at least …
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Biology and peculiarities of the population-genetic structure of Lithuanian Cephalaspidomorphs (Cephalaspidomorphi) /
… life cycle. Therefore, researches into lampreys in Lithuania are fragmented and knowledge on species diversity, distribution, abundance and status of lamprey populations in Lithuania is poor. The present thesis reviews the distribution and abundance of Lampetra fluviatilis (Linnaeus, …
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Lietuvos apskritažiomenių (Cephalaspidomorphi) biologija ir populiacinės-genetinės struktūros ypatumai /
… life cycle. Therefore, researches into lampreys in Lithuania are fragmented and knowledge on species diversity, distribution, abundance and status of lamprey populations in Lithuania is poor. The present thesis reviews the distribution and abundance of Lampetra fluviatilis (Linnaeus, …
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Spatial and Temporal Patterns of Anadromous Fish Passage at Boshers Dam Vertical Slot Fishway on the James River, Richmond, Virginia
… of American shad (Alosa sapidissima) and sea lamprey (Petromyzon marinus) passage. The ecological effects of restoring connectivity to upstream habitat for gizzard shad (Dorosoma cepedianum) and blue catfish (Ictalurus furcatus) are also discussed. Regression analysis determined that the best …
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Deciphering the regulatory code driving neural crest evolution and development
… structures including peripheral neurons. The sea lamprey, Petromyzon marinus, is at the base of the vertebrate lineage and offers an ideal model for the ancestral neural crest. Comparisons to the modern neural crest gene regulatory network (GRN) such as that of the chicken can elucidate essential …
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