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 20 of 143 for “"crustaceans"”.
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Personality in Stomatopod Crustaceans
… or mantis shrimp, are small, predatory crustaceans of tropical and subtropical waters. Mantis shrimp research has focused largely on their agonistic interactions and complex visual systems. Despite their broad behavioral repertoire, stomatopods have not yet been investigated for …
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The decapod crustaceans of Iowa
1 PDF file (x, 149 pages)
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Biodiversity and Biogeography of Amphipod Crustaceans
… biodiversity, and biogeography of amphipod crustaceans and is an attempt to address the significant knowledge gaps in the absence of global assessments of the diversity and biogeography of amphipods and put a regional-scale study in Indonesia into a global context. This thesis first assessed …
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Comparative Systematics of Subterranean Amphipod Crustaceans (Hadzioidea)
<p>The research project presented in this doctoral dissertation is a compilation of six published papers. Therefore, instead of being a single comprehensive project, it is composed of a number of sub-projects. Introductory and summary sections provide structure for the compilation of papers.</p> …
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Dactyls reveal evolutionary patterns in decapod crustaceans
Because of their high preservation potential and uses in foraging and defense, decapod crustacean dactyls (movable fingers of claws) are potentially excellent test subjects for an ongoing debate concerning the relative importance of top-down (predators) and bottom-up (prey) controls on morphologic …
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Physical and chemical correlates of Sacramento County vernal pool crustaceans
… Valley during winter 2012 were sampled for crustaceans and water characteristics every 2 weeks for 14 weeks. Twenty-two species of crustaceans were identified, 13 of which are possibly new species. In this dry, late rainfall year, fairy shrimp and copepods were the first species to emerge in …
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Oxyconformity in Burrow-dwelling Crustaceans : Aerobic Metabolism of HEMISQUILLA ENSIGERA CALIFORNIENSIS
… been examined, is an oxyregulator; and that like crustaceans in general, they have only limited anaerobic capabilities. Contrary to expectations, I found that <em>H. ensigera</em> is an oxyconformer or at best a weak oxyregulator, and that the species has substantial anaerobic capacity. Since it …
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Comparative Systematics of Subterranean Amphipod Crustaceans in the Families Crangonyctidae and Bogidiellidae
<p>The research project presented in this doctoral dissertation deals with the systematics of two different taxonomic groups of subterranean amphipods (Crustacea). Therefore, rather than being a single project, this study is divided into several sub-projects. Altogether, the chapters for the …
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Ecophysiological adaptations to salinity variation in early life-history stages of decapod crustaceans
Decapod crustaceans which successfully invade habitats with hypo-osmotic conditions must show strong hyper-osmoregulatory capacities, stable growth also at reduced salinities, strongly differentiated ion-transporting tissues, high activities of Na+-K+-ATPase, and an enhanced expression of mRNA …
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Effects of high hydrostatic pressure on neuromuscular transmission in shallow-living and deep-living crustaceans
… transmission in shallow- and deep-living crustaceans were compared. Pressure caused depression of the amplitude of excitatory junctional potentials (e.j.p.s) at the neuromuscular junction in the shallow-living crab, Libinia emarginata. A pressure of 100 atm depressed the e.j.p. amplitude …
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Testing The Peninsula Effect: Does It Affect Freshwater Crustaceans Inhabiting Ephemeral Wetlands On Florida's Ridges?
… climate in the south. I studied freshwater crustaceans in isolated wetlands because crustaceans are diverse and disperse passively among these discrete habitats. My study design and statistical analyses controlled for two of the three mechanisms (habitat and history) that may generate a …
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Effects of hypersalinity on the behaviour, physiology and survival of commercially important North Sea crustaceans
Despite the increasing number of hypersaline discharges associated with desalination and, more recently, solute mining activities, there is little existing information relating to the effects such environmental disruptions may have on populations of commercially-important crustacean species. The …
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Aspects of the physiology of decapod crustaceans with particular reference to the live marketing of Cancer pagurus (L) and Necora puber (L)
The crabs Cancer pagurus (L) and Necora puber (L) are exported live, in bulk, from the UK to various continental countries. The success of this relatively new trade is marred by the incidence of mortalities and impaired quality of the delivered product. These studies addressed various causes - …
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Effects of pollution on marine crustaceans in Qatari waters : a baseline survey and a case study on genotoxicity indicators in an endemic shrimp
In this thesis the baseline and seasonal variations of the trace metals (TM) (Arsenic (As), Cadmium (Cd), Cobalt (Co), Chromium (Cr), Copper (Cu), Iron (Fe), Manganese (Mn), Nickel (Ni), Lead (Pb), Vanadium (V) and Zinc (Zn). Methylmercury (CH3Hg), organotins (OT) and polychlorinated biphenyls …
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Chemical communication and its ecological consequence in the Lysmata shrimp
Male crustaceans must find and identify receptive females to mate successfully. Mate recognition depends mainly on sex pheromones, which are detected by antennae and antennules. Distance (soluble)pheromone mediates mating behaviour of some decapod crustaceans. Contact pheromone (an insoluble …
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Molecular biological studies on neuropeptides of the adipokinetic hormone/red pigment-concentrating hormone family and the neuroparsin family in the arthropod sister groups of insects and crustaceans
… of the AKH/RPCH and NP transcripts within crustaceans and insects.
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Bopirídeos do Brasil (Crustacea - Isopoda)
… the Suborder Epicaridea, parasites of the other crustaceans, and makes a detailed study of the Brazilian forms of the Family Bopyridae, the most representative of the group. Some remarks are made on the life cycle of this crustaceans from egg to adult phase, with descriptions of the …
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Multi-component chemical defense in seahares (Gastropoda:Opisthobranchia): antipredator compounds act as both honest and deceptive signals to multiple predator species
… and opaline protected seahares against crustaceans in a different and unusual way---by stimulating them to feed. Opaline was as stimulatory as homogenates of squid and shrimp in behavioral studies and electrophysiological assays of chemosensory neurons of lobsters. The attractiveness of …
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Food, Growth, and Reproduction of White Crappies (Pomixis Annularis) and Black Crappies (P. Nigromaculatus) in Lake Poinsett, South Dakota
… white crappies consisted of 59.0% plankton1o crustaceans, 25.2 % insects, 14.5 % fish, and 1.3 % miscellaneous organisms. The food volume of 39 adult black crappies consisted of 39.0 % planktonic crustaceans, 3.5 % insects, 57.8 % fish, and 0.7 % miscellaneous organisms. Both species selected …
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