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Articles 1 - 7 of 7
Full-Text Articles in Life Sciences
The Inheritance Of Morphological And Behavioral Differences In The Mating Signals Of Sailfin And Shortfin Mollies, Stephanie Loveless
The Inheritance Of Morphological And Behavioral Differences In The Mating Signals Of Sailfin And Shortfin Mollies, Stephanie Loveless
All Theses
Changes in mating signals often result in the development of new species, thus, understanding the genetic basis of traits that confer pre-mating reproductive isolation can shed light on the speciation process. This study used interspecific hybridization between poeciliid fish, a sailfin molly (Poecilia velifera) and a shortfin molly (P. mexicana), to generate reciprocal F1 and backcross hybrids to investigate patterns of inheritance of traits that contribute to mating signal differences between these two groups of mollies. The first part of my study focused on behavioral differences in the mating system of sailfin and shortfin mollies. I observed mating behaviors of …
Changes In Brain Biochemistry And Feeding Behavior In Hybrid Striped Bass Exposed To Environmental Contaminants, Kristen Gaworecki
Changes In Brain Biochemistry And Feeding Behavior In Hybrid Striped Bass Exposed To Environmental Contaminants, Kristen Gaworecki
All Dissertations
Biochemical endpoints are useful when determining contaminant exposure in aquatic organisms. However, behaviors can also be impaired by environmental contaminants. Links between changes in brain biochemistry and behavior have been made, and understanding these relationships could increase the utility of these endpoints in ecological risk assessments. The overall goal of this research was to determine relationships between an ecologically relevant fish behavior and brain biochemistry. To accomplish this goal, I developed a behavioral bioassay that quantified the time it took exposed hybrid striped bass (Morone saxatilis x M. chrysops) to capture unexposed prey, fathead minnows (Pimephales promelas). Chemically targeted brain …
The Effects Of Circular And Linear Exercise On Articular Cartilage In Sheep, Kristine Vernon
The Effects Of Circular And Linear Exercise On Articular Cartilage In Sheep, Kristine Vernon
All Dissertations
Excessive exercise may induce osteoarthritis (OA), or degeneration, of articular cartilage, which is a leading cause of lameness and decreased use in horses. The purposes of this study were to utilize a sheep model to determine the effects of circular and linear exercise on the macroscopic and microscopic characteristics of articular cartilage in the metacarpal-phalangeal (MCP) joint and to evaluate biochemical changes in serum and synovial fluid compared to non-exercised control lambs.
Twenty lambs were randomly assigned to three groups: circular exercise (C, 8.5m diameter; n = 8), straight-line exercise (S, treadmill; n = 8) and non-exercised control (CON, n …
Endocrine And Follicular Dynamics During The Perideviation Period In Cattle, Morgan Krause
Endocrine And Follicular Dynamics During The Perideviation Period In Cattle, Morgan Krause
All Theses
Ovarian hyperstimulation used in conjunction with embryo transfer techniques is an assisted reproductive technology that aids cattle producers in reaching their reproductive, genetic, and financial goals; however, viable embryo recovery results are inconsistent, possibly because the reproductive endocrine profile is poorly understood. The objective of these experiments was to evaluate the endocrinological and ovarian dynamics surrounding follicular deviation in hyperstimulated cows.
In Experiment 1, the perideviation period (PDP; largest follicle diameter from 8 - 10- mm) was examined in Hyperstimulated (50 mg FSH) or Control (saline) dry Holstein cows (n = 4 / group). Daily blood samples began at the …
Characterization Of Soluble Matrix From Molluscan Shell With An Emphasis On Two Major Phosphoproteins From The Eastern Oyster, Crassostrea Virginica, Mary Johnstone
All Dissertations
The soluble organic matrix (SM) extracted from the shell of the Eastern oyster, Crassostrea virginica was analyzed to identify the constituent proteins and their structures. Two acidic proteins with estimated molecular weights of 48 and 55 kD were isolated and determined to have highly related structures. Both proteins are comprised primarily of aspartate, serine, and glycine which represent nearly 90% of the total amino acids. Studies indicate that both proteins are phosphorylated and have estimated isoelectric points in the range of 3 to 5. Evidence suggests that poly-aspartate and poly-serine domains are present in the 48 kD protein. Amino terminal …
Algal And Bacterial Nitrogen Processing In A Zero-Discharge Suspended-Culture Shrimp Production System, Christian-Dominik Henrich
Algal And Bacterial Nitrogen Processing In A Zero-Discharge Suspended-Culture Shrimp Production System, Christian-Dominik Henrich
All Theses
The objective of this research was to further modify and develop the Clemson Partitioned Aquaculture System (PAS) design resulting in a system design capable of yielding economic feasible production rates of marine shrimp, Litopenaeus vannamei, in excess of 45,000[kg/ha] (40,000[lb/ac]) within a 5 month culture period while minimizing impact on the surrounding environment. The operation of the pilot-scale high-rate prototype shrimp culture system showed that it is possible to combine chemoautotrophic and photoautotrophic processing of feed and waste products within the system. A total of 23,400[kg/ha] (20,800[lb/ac]) were harvested at the end of the season (149 days from PL-8/9 shrimp …
Development Of A Novel Fouling Deterrence Strategy By Understanding The Efect Of Noradrenaline On The Cells Of Eastern Oyster, Crassostrea Virginica And Cypris Larve Of The Striped Barnacle Balanus Amphitrite, Neeraj Gohad
All Dissertations
ABSTRACT
The focus of this study was to understand and evaluate the effect of noradrenaline (NA) on two prominent fouling marine invertebrates, the Eastern Oyster, Crassostrea virginica and the Striped Barnacle, Balanus amphitrite for the purpose of developing a novel fouling deterrence strategy.
To understand the effect of NA at a cellular level the immune cells (hemocytes) of C. virginica were chosen as representative molluscan cells. Upon stimulation with 10 micro-molar of noradrenaline ~4% hemocytes of C. virginica labeled positive for the beta-adrenergic receptor (beta-AR). Upon NA stimulation the beta-AR positive cells formed cell-cell synapses and apoptosis was detected in …