Global ETD Search

1	BIOACCUMULATION OF POLYCHLORINATED BIPHENYLS IN THE NORTHERN DIAMONDBACK TERRAPIN (Malaclemys terrapin terrapin) Ismail, Niveen January 2010 (has links) Polychlorinated biphenyls (PCBs) are persistent organic pollutants that can bioaccumulate in organisms. PCBs are documented endocrine disrupting chemicals and are known to cause developmental, reproductive, and neurobiological disorders. This study examines the bioaccumulation of PCBs in the northern diamondback terrapin (Malaclemys terrapin terrapin), a species that is endemic to the brackish waters of the East Coast salt marshes of the United States. The two populations studied are located in Cape May County, NJ, a site with low levels of contamination and Jamaica Bay, NY, which is a highly contaminated site. While PCBs bioaccumulation has been extensively researched, many studies involve lethal sampling techniques. Such techniques can be detrimental to populations and may not be viable for long-term studies. This study examined the utility of the chorioallantoic membrane (CAM) as a non-lethal sampling technique for PCB analysis. In order to determine the viability of the CAM, maternal transfer of contaminants was also analyzed. Ten terrapin samples from each field location were analyzed. Egg and CAM samples were obtained from both field sites and liver samples were also collected from Cape May County terrapins. PCB levels and congener profiles were similar in both field locations. While PCB congeners were detected in liver, egg, and CAM samples, less chlorinated congeners preferentially partitioned in the CAM. Liver and egg sample PCB concentrations were strongly correlated, but the CAM concentrations were weakly correlated to liver and egg samples. Examination of homolog groups indicated a strong correlation between hexachlorinated biphenyls in all three sample types. Preliminary study results indicated that maternal transfer of PCB contaminants does occur with selective partitioning of congeners into the CAM. / Biology Biology, Ecology Diamondback Terrapin Ecotoxicology Malaclemys Terrapin Terrapin Polychlorinated Biphenyls
2	The Population Ecology of a Headstart Supplemented Population of Diamondback Terrapins (Malaclemys terrapin) at the Poplar Island Environmental Restoration Project in the Middle Chesapeake Bay Smeenk, Nicholas A. 05 August 2010 (has links) No description available. Animals Biology Ecology Environmental Science headstarting diamondback terrapin Malaclemys terrapin mark-recapture population ecology
3	The Influences and Consequences of Nest Site Choice by the Diamondback Terrapin (Malaclemys terrapin) on a Man-made Island Leger, Daniel J. 11 June 2019 (has links) No description available. Animals Biology Conservation Ecology Diamondback terrapin Malaclemys terrapin Poplar Island Conservation Habitat construction Island Nest site Nest site choice Nesting Habitat degradation
4	The Population Ecology, Molecular Ecology, and Phylogeography of the Diamondback Terrapin (Malaclemys terrapin) Converse, Paul E. 19 September 2016 (has links) No description available. Genetics Biology population genetics Malaclemys terrapin conservation genetics phylogeography turtle gene flow population structure approximate Bayesian computation mutation rate population divergence Chesapeake Bay coalescent theory
5	Assessment of Cranial Morphology and Function Underlying Dietary Diversity inCryptodires Croghan, Jasmine A. January 2022 (has links) No description available. Anatomy and Physiology Animals Biology Biomechanics Comparative Evolution and Development Ecology Morphology Organismal Biology testudines turtle feeding morphology cryptodire functional morphology feeding morphology diet auto3DGM diceCT geometric morphometrics bite force PCSA specific tension dimorphism sexual dimorphism Malaclemys terrapin Trachemys scripta Chelydra serpentina turtle feeding jaw muscle testudine feeding turtle morphology, turtle diet

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