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Showing 1 to 20 of 99 for “"Crustacean"”.
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Crustacean phylogenetic systematics and opsin evolution
… evolution. Second, in order to place studies of crustacean opsin evolution in context, phylogenetic studies of two crustacean groups (Mysidae and Decapoda) were completed. Studies of Mysidae utilized 16S mtDNA, and 18S and 28S rDNA to reconstruct phylogenetic relationships and assess newly …
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Functional implications of the neuromuscular transform in decapod crustacean locomotion
All animals face the same basic challenges in controling movement through their environment. The central nervous system must activate and effectively control muscle fibers capable of accomplishing the behavior. For multi functional muscles, an array of muscle fiber types must be selectively …
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Molecular Studies on Head Development of the Amphipod Crustacean Parhyale hawaiensis
Der adulte Kopf bilateralsymmetrischer Tiere ist eine anteriore, meist tagmatisierte morphologische Einheit. In segmentierten Spezies liegen der Entwicklung der anterioren Kopfsegmente andere genetische und molekulare Mechanismen zugrunde als der der posterioren Segmente, die auf gruppen- und …
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Observations and experiments on the blind crustacean Asellus Stygius (Packard) Forbes
Made available in DSpace on 2017-11-30T22:11:21Z (GMT). No. of bitstreams: 2 5956106.pdf: 1175022 bytes, checksum: 3d98e1f9da2af6157956be77c9a0fe77 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1893
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STUDIES ON THE ECOLOGY OF HYALE NILSSONI (RATHKE) 1843, AN ALGAL-INHABITING AMPHIPOD CRUSTACEAN
… tolerances of the talitroidean amphipod crustacean, Hyale nilssoni were studied at open coastal and estuarine rocky intertidal shores of New Hampshire. Microhabitat distribution and mouthpart morphology of the sympatric H. nilssoni and H. plumulosa were also compared at Nobska Point, …
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The crustacean zooplankton communities of three prairie lakes subject to varying degrees of anoxia
The crustacean zooplankton communities in three small prairie lakes subject to varying degrees of anoxia were studied for 14 months from February 1976 to April 1977. Ten or twelve samples were collected with a tube in both the deep and shallow zones of each lake once weekly during summer, biweekly …
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Breaking the MF curse: the regulatory role of the Methyl farnesoate – MEKRE93 pathway in crustacean molting
… development, respectively. On the other hand, crustacean molting is primarily regulated through the endocrine crosstalk between 20-E and the neuropeptide molt-inhibiting hormone (MIH). MIH secretion by the X-organ, sinus gland complex (XO) inhibits Y-organ (YO) synthesis of 20-E. Molting is …
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Comparative analysis of gene expression in two sexually dimorphic crustacean species Euphilomedes carcharodonta and Euphilomedes morini
<p>Sexual dimorphism is the phenotypic difference between males and females of the same species, but how these phenotypic differences arise is largely unstudied at the molecular level. It is understood that sexual selection, or competition for mates, drives sexual dimorphism, but more recently it …
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Motor neuron output in the crustacean cardiac ganglion is organized and maintained by homeostatic conductance relationships
Generating appropriate and functional neuronal output is a matter of fundamental importance to nervous systems across species and phyla. Potential perturbations to a neurons intrinsic excitability alone include Hebbian style plasticity, ion channel turnover and neuromodulation. With these dynamic …
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Studies on the biology of Cyathocephalus truncatus (Pallas, 1781) (Cestoda : Spathebothridea) in its fish and crustacean hosts
… the procercoids of C.truncatus in the amphipod crustacean Gammarus pulex in the same habitat. Other helminth parasites recorded in both fish and gammarid hosts include Echinorhynchus truttae, Echinorhynchus salmonis, Neoechinorhynchus rutili, Cystidicola farionis, Cucullanus truttae and …
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Transcriptomics to gene expres[s]ion : analysis of the ontogeny of sexual dimorphism in a crustacean, Euphilomedes carcharodonta
… image-forming eyes typical to those of other pancrustaceans (Hexapoda+Crustacea) while females do not. This sexual dimorphism is of particular interest because it allows me to study the genetic underpinnings of a regained trait using individuals of near-identical genetic backgrounds, as these …
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The Developmental and Genetic Basis of Differences in Cave and Surface-dwelling Forms of the Crustacean, Asellus aquaticus
… invertebrate model system the freshwater isopod crustacean <em>Asellus aquaticus</em>, which contains both surface-dwelling and blind cave-dwelling forms. Our goal was to investigate how and when during embryonic development all of these morphologically differences came about. In addition, we …
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A Comparison of Recruitment Strategies Among Brachyuran Crustacean Megalopae of the York River, Lower Chesapeake Bay and Adjacent Shelf Waters
<p>Twenty-one stations forming a transect of the Pamunkey River, York River, lower Chesapeake Bay and adjacent coastal waters were sampled from July through September 1980. The megalopa stages of 11 brachyuran species were sampled. Vertical and horizontal distributions are described for each …
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Larval ecology and synchronous reproduction of two crustacean species : Semibalanus balanoides in New England, USA and Gecarcinus quadratus in Veraguas, Panama
… for two highly abundant, ecologically important crustacean species: the temperate acorn barnacle, Semibalanus balanoides, and the tropical terrestrial crab, Gecarcinus quadratus. Larval ecology of these two species was also studied to determine potential sources of larval mortality and …
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Larval ecology and synchronous reproduction of two crustacean species : Semibalanus balanoides in New England, USA and Gecarcinus quadratus in Veraguas, Panama
… for two highly abundant, ecologically important crustacean species: the temperate acorn barnacle, Semibalanus balanoides, and the tropical terrestrial crab, Gecarcinus quadratus. Larval ecology of these two species was also studied to determine potential sources of larval mortality and …
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Analysis of Hydric Pine Flatwood Ephemeral Pool Macroinvertebrate and Crustacean Assemblages Along a Temporal and Spatial Gradient From a Hypothesized Colonial Source
<p>A survey of the macroinvertebrate and crustacean assemblages in hydric pine flatwood wetlands during fill and drawdown periods was conducted from September to November 1998, in Lee County, Florida. Physical and chemical information, relationships between community composition and physical and …
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Patterns of Diurnal Vertical Distribution and Dispersal-Recruitment Mechanisms of Decapod Crustacean Larvae and Postlarvae in the Chesapeake Bay, Virginia and Adjacent Offshore Waters
… economically important populations of decapod crustaceans. Vertical positioning in the water column plays a major role in the particular strategies of retention or expulsion with immigration.</p> <p>The present study was undertaken to investigate variations in vertical distribution according to …
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