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Diversity of Skates (Batoidea: Rajoidei) and the Spatial Structure of NW Atlantic Communities

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dc.contributor.advisor Frisk, Michael G en_US
dc.contributor.author Martinez, Christopher Michael en_US
dc.contributor.other Department of Marine and Atmospheric Science. en_US
dc.date.accessioned 2017-09-20T16:49:38Z
dc.date.available 2017-09-20T16:49:38Z
dc.date.issued 2014-12-01 en_US
dc.identifier.uri http://hdl.handle.net/11401/76197 en_US
dc.description 157 pg. en_US
dc.description.abstract Trait diversity often underlies complexity observed in biological systems. Whether it is behavior, life history, form or function, variation imparts differential performance on the organism, which may influence processes at higher levels of organization. Using two approaches, my dissertation research concerns the appraisal of diversity in fishes and its consequences for their ecology and evolution. The first two chapters focus on variety of spatial behaviors in northwest Atlantic marine communities. Temporal changes in community habitat utilization, as quantified by the interspecific abundance-occupancy (A-O) relationship, were the focus of chapter one. Trends in the A-O relationship indicated large-scale reorganization in some communities, with assemblage structure shifting towards organisms with shorter life histories and rapid colonization potential. For chapter two, I developed a Monte Carlo simulation to investigate the role of spatial distribution in the realization of temporal A-O trends. This work showed that the empirical results obtained in chapter one may be recreated from a collection of negative binomial-distributed catches derived from natural communities. Changes in spatial behaviors of species were implicated in a notable example of rapid community change in the Gulf of Maine. The second half of my dissertation examines the morphological diversity of Batoid fishes (skates, rays and allies) and its relation to factors associated with ecology and life history. In chapter three, I used geometric morphometrics to provide an initial assessment of pectoral fin diversity among many of the existing Batoid families. A majority of shape variation corresponded with taxa having rounded versus triangular fins. This was highly correlated with aspect ratio, a characteristic related to swimming mode and lifestyle. In my final chapter, I examined developmental shape trajectories in three species of northwest Atlantic skate. Divergence of body shapes in these fishes appears to be related to the development of sexual organs at maturity. Patterns of variation between the species are discussed relative to the evolution of disparate reproductive strategies and life histories. en_US
dc.description.sponsorship This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree. en_US
dc.format Monograph en_US
dc.format.medium Electronic Resource en_US
dc.language.iso en_US en_US
dc.publisher The Graduate School, Stony Brook University: Stony Brook, NY. en_US
dc.subject.lcsh Ecology en_US
dc.subject.other abundance-occupancy, batoid, community, geometric morphometrics, northwest Atlantic, Rajoidei en_US
dc.title Diversity of Skates (Batoidea: Rajoidei) and the Spatial Structure of NW Atlantic Communities en_US
dc.type Dissertation en_US
dc.mimetype Application/PDF en_US
dc.contributor.committeemember Levinton, Jeffrey en_US
dc.contributor.committeemember Chapman, Demian en_US
dc.contributor.committeemember Rohlf, F. en_US
dc.contributor.committeemember Duplisea, Daniel. en_US


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