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Articles 4261 - 4290 of 8069
Full-Text Articles in Entire DC Network
Elevated Levels Of Trace Elements In Cores Of Otoliths And Their Potential For Use As Natural Tags, Benjamin I. Ruttenberg, Scott L. Hamilton, Michael J.H. Hickford, Georges L. Paradis, Michael S. Sheehy, Julie D. Standish, Ofer Ben-Tzvi, Robert R. Warner
Elevated Levels Of Trace Elements In Cores Of Otoliths And Their Potential For Use As Natural Tags, Benjamin I. Ruttenberg, Scott L. Hamilton, Michael J.H. Hickford, Georges L. Paradis, Michael S. Sheehy, Julie D. Standish, Ofer Ben-Tzvi, Robert R. Warner
Biological Sciences
Variation in the chemical composition of fish otoliths has been used in recent years to address a range of ecological questions, including levels of stock mixing, variation in habitat use, and rates of larval exchange. While some of these questions have been answered with varying success, the degree to which discrete populations are connected via larval exchange remains unknown. To identify larval sources using natural variation in otolith chemistry, we must distinguish and measure the chemical composition of the otolith core, the portion of the otolith formed at the spawning site. Using laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS), …
Habits Of Magnetosome Crystals In Coccoid Magnetotactic Bacteria, Ulysses Lins, Martha R. Mccartney, Marcos Farina, Richard B. Frankel, Peter R. Buseck
Habits Of Magnetosome Crystals In Coccoid Magnetotactic Bacteria, Ulysses Lins, Martha R. Mccartney, Marcos Farina, Richard B. Frankel, Peter R. Buseck
Physics
High-resolution transmission electron microscopy and electron holography were used to study the habits of exceptionally large magnetite crystals in coccoid magnetotactic bacteria. In addition to the crystal habits, the crystallographic positioning of successive crystals in the magnetosome chain appears to be under strict biological control.
Patterns, Causes And Consequences Of Regional Variation In The Ecology And Life History Of A Reef Fish, Benjamin I. Ruttenberg, Alison J. Haupt, Angel I. Chiriboga, Robert R. Warner
Patterns, Causes And Consequences Of Regional Variation In The Ecology And Life History Of A Reef Fish, Benjamin I. Ruttenberg, Alison J. Haupt, Angel I. Chiriboga, Robert R. Warner
Biological Sciences
Many species vary in their ecology across their geographic ranges in response to gradients in environmental conditions. Such variation, which can influence life history traits and subsequent demography of populations, usually occurs over large spatial scales. However, describing and understanding the causes of such variation is difficult precisely because it occurs over such large spatial scales. In this study, we document spatial variation in the ecology of a common reef fish, Stegastes beebei, in the Gala´pagos Islands and test a number of potential causal mechanisms. The pattern resembles that seen in latitudinal variation: individuals are larger, occur in higher densities, …
Summer Mustang, July 21, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
July 20, 2005 Cal Poly Report, Public Affairs Office
July 20, 2005 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Settlement Brings $500,000 To Cal Poly For Animal Nutrition Research, Public Affairs Office
Settlement Brings $500,000 To Cal Poly For Animal Nutrition Research, Public Affairs Office
Press Releases
No abstract provided.
July 20, 2005 Cal Poly Report, Public Affairs Office
July 20, 2005 Cal Poly Report, Public Affairs Office
Cal Poly Report
No abstract provided.
Adaptive Sampling Of Phytoplankton Responses To Episodic Physical Forcing In The Nearshore Coastal Ocean, Mark A. Moline
Adaptive Sampling Of Phytoplankton Responses To Episodic Physical Forcing In The Nearshore Coastal Ocean, Mark A. Moline
Biological Sciences
The original proposal focused on the linkages between in-water physical, biological and optical dynamics and to assess the degree to which remote sensing could be applied. These areas were approached during the 2001 sampling season and with follow on studies, as part of the extension of the grant through the PECASE award, there are three specific areas of work that have evolved from these original efforts. The first is a further examination of the coherence between convergence zones, general current patterns and spatial distribution of in-water biological signals (phytoplankton). The second is a remote sensing focus, attempting to define the …
Proliferation Zones In The Salmon Telencephalon And Evidence For Environmental Influence On Proliferation Rate, Sean C. Lema, Mark J. Hodges, Michael P. Marchetti, Gabrielle A. Nevitt
Proliferation Zones In The Salmon Telencephalon And Evidence For Environmental Influence On Proliferation Rate, Sean C. Lema, Mark J. Hodges, Michael P. Marchetti, Gabrielle A. Nevitt
Biological Sciences
Cell proliferation occurs in the brain of fish throughout life. This mitotic activity contributes new neurons to some brain subdivisions, suggesting potential for plasticity in neural development. Recently we found that the telencephalon in salmonids (salmon, trout) is significantly reduced in fish reared in hatcheries compared to wild fish, and that these differences resulted in part from rearing conditions. Here, we describe localized areas of cell proliferation in the telencephalon of juvenile coho salmon (Oncorhynchus kisutch) and begin to explore whether mitotic activity in these areas is sensitive to environmental conditions. Using the 5-bromo-2'-deoxyuridine (BrdU) cell birthdating technique, …
Faculty Tenure And Promotion Awards Announced, Public Affairs Office
Faculty Tenure And Promotion Awards Announced, Public Affairs Office
Press Releases
No abstract provided.
Mustang Daily, June 2, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Design, Fabrication, And Characterization Of An Electrostatically Actuated Microfluidic Valve, Ryan Dale Rivers
Design, Fabrication, And Characterization Of An Electrostatically Actuated Microfluidic Valve, Ryan Dale Rivers
Master's Theses
Microfluidic device construction uses certain critical structures throughout many different applications. The valve structure remains one of the primary structures that present a barrier to miniaturization and portability. The extensive support devices required to power common microfluidic valves remove a significant amount of freedom from microfluidic device design. Moving to electrostatic methods of actuation could reduce the overall footprint of the microfluidic valve. This thesis covers three concept prototypes. Concept I presents an attempt at inlaying gold electrodes into polydimethylsiloxane substrates. Concept II attempts to use liquid silver injected into channels as electrode materials. Concept III uses aluminum sputtering to …
Xiphiorhynchus Cf. X. Eocaenicus (Woodward, 1901), (Scombroidei: Xiphiidae: Xiphiorhynchinae) From The Middle Eocene Of Mississippi, The First Transatlantic Distribution Of A Species Of Xiphiorhynchus, Harry L. Fierstine, James E. Starnes
Xiphiorhynchus Cf. X. Eocaenicus (Woodward, 1901), (Scombroidei: Xiphiidae: Xiphiorhynchinae) From The Middle Eocene Of Mississippi, The First Transatlantic Distribution Of A Species Of Xiphiorhynchus, Harry L. Fierstine, James E. Starnes
Biological Sciences
An anterior (distal) rostrum (MMNS 2957) from the Moodys Branch Formation (late middle Eocene). Tesheva Creek, Yazoo County, Mississippi, U.S.A., is described and identified as Xiphiorhynchus cf. X. eocaenicus. The specimen is compared to various species of Xiphiorhynchus, especially the holotype of X. eocaenicl.ls (BMNH 25744), Braeklesham Group, early middle Eocene, England. This represents the first record of a species of Xiphiorhynchl.ls in deposits on both sides of the North Atlantic Ocean. Xiphiorhynchus eocaenicus is thought to have had similar environmental prtoferences and habits as the extant swordfish, Xiphias gladius. Since the swordfish prefers oceanic water and makes transatlantic movements, …
A New Aglyptorhynchus (Perciformes: Scombroidei) From The Lincoln Creek Formation (Late Oligocene, Washington, U.S.A.), Harry L. Fierstine
A New Aglyptorhynchus (Perciformes: Scombroidei) From The Lincoln Creek Formation (Late Oligocene, Washington, U.S.A.), Harry L. Fierstine
Biological Sciences
A partial rostrum with an attachcd lower jaw, a posterior neurocranium, and a proximal hyomandibular from the Lincoln Creek Formation (late Oligocene, Washington) arc described and identified as Aglyptorhynchlls coillmhianlls sp, nov. In addition. ten articulated anterior caudal vertebrae presumably from the Lincoln Creek Formation arc described and identified as Aglyptorhyllchlls sp. This is a second record of an Aglyptorhynchus from a deposit bordering the Pacific Ocean, The specimens are compared with other billfishes (Perciformes: Scombroidei), both extant and extinct. Unusual features include a tripartite celous occipital condyle composed equally of the basioccipital and cxoccipitals, a lower jaw that is …
Sexual Size Dimorphism And Growth Plasticity In Snakes: An Experiment On The Western Diamond‐Backed Rattlesnake (Crotalus Atrox), Emily N, Taylor, Dale F. Denardo
Sexual Size Dimorphism And Growth Plasticity In Snakes: An Experiment On The Western Diamond‐Backed Rattlesnake (Crotalus Atrox), Emily N, Taylor, Dale F. Denardo
Biological Sciences
We conducted an experiment to examine the effects of sex and food intake on growth, mass gain, and attainment of sexual maturity in Western Diamond‐backed Rattlesnakes (Crotalus atrox). We also measured testosterone levels to determine whether testosterone might be involved in the male‐biased sexual size dimorphism observed in this species. We collected neonate rattlesnakes and raised them in the laboratory for 2 years on either a high‐intake diet (fed one mouse per week) or a low‐intake diet (fed one mouse every 3 weeks). High‐intake snakes grew and gained mass more rapidly than low‐intake snakes, but males did not …
Effects Of Food Supplementation On The Physiological Ecology Of Female Western Diamond‐Backed Rattlesnakes (Crotalus Atrox), Emily N. Taylor, Michael A. Malawy, Dawn M. Browning, Shea V. Lemar, Dale F. Denardo
Effects Of Food Supplementation On The Physiological Ecology Of Female Western Diamond‐Backed Rattlesnakes (Crotalus Atrox), Emily N. Taylor, Michael A. Malawy, Dawn M. Browning, Shea V. Lemar, Dale F. Denardo
Biological Sciences
Food availability is an important factor in the life histories of organisms because it is often limiting and thus can affect growth, mass change, reproduction, and behaviors such as thermoregulation, locomotion, and mating. Experimental studies in natural settings allow researchers to examine the effects of food on these parameters while animals are free to behave naturally. The wide variation among organisms in energy demands and among environmental food resources suggest that responses to changes in food availability may vary among organisms. Since most supplemental feeding field experiments have been conducted on species with high energy demands, we conducted a supplemental …
Taxonomic Revision And Stratigraphic Provenance Of Histiophorus Rotundus Woodward 1901 (Teleostei, Perciformes), Kenneth A. Monsch, Harry L. Fierstine, Robert E. Weems
Taxonomic Revision And Stratigraphic Provenance Of Histiophorus Rotundus Woodward 1901 (Teleostei, Perciformes), Kenneth A. Monsch, Harry L. Fierstine, Robert E. Weems
Biological Sciences
Until recently, Histiophorus rotundus Woodward 1901, was known from a single, poorly preserved rostrum from the Tertiary phosphate beds near Charleston, South Carolina, an area from which many fossils have been described. The specimen is relatively featureless externally; its internal anatomy is unknown and the documentation of its geological provenance was poor. In an earlier revision the species was transferred to the fossil billfish genus Xiphiorhynchus Van Beneden, 1871. Here we confirm this designation, supported by new morphological studies of the holotype, recently found specimens of tXiphiorhynchus rotundus (Woodward, 1901), and the stratigraphic record of tXiphiorhynchus. The systematic paleontology we …
A Cartilage Growth Mixture Model For Infinitesimal Strains: Solutions Of Boundary-Value Problems Related To In Vitro Growth Experiments, Stephen M. Klisch, Robert L. Sah, Anne Hoger
A Cartilage Growth Mixture Model For Infinitesimal Strains: Solutions Of Boundary-Value Problems Related To In Vitro Growth Experiments, Stephen M. Klisch, Robert L. Sah, Anne Hoger
Mechanical Engineering
A cartilage growth mixture (CGM) model is linearized for infinitesimal elastic and growth strains. Parametric studies for equilibrium and nonequilibrium boundary-value problems representing the in vitro growth of cylindrical cartilage constructs are solved. The results show that the CGM model is capable of describing the main biomechanical features of cartilage growth. The solutions to the equilibrium problems reveal that tissue composition, constituent pre-stresses, and geometry depend on collagen remodeling activity, growth symmetry, and differential growth. Also, nonhomogeneous growth leads to nonhomogeneous tissue composition and constituent pre-stresses. The solution to the nonequilibrium problem reveals that the tissue is nearly in equilibrium …
As-637-05 Resolution On Intellectual Property Policy, Intellectual Property Review Committee
As-637-05 Resolution On Intellectual Property Policy, Intellectual Property Review Committee
Academic Senate Resolutions
Adopts Intellectual Property Policy.
Academic Senate - Agenda, 5/31/2005, Academic Senate
Academic Senate - Agenda, 5/31/2005, Academic Senate
Academic Senate Agendas
No abstract provided.
Cal Poly Names 2004-2005 Distinguished Teachers, Public Affairs Office
Cal Poly Names 2004-2005 Distinguished Teachers, Public Affairs Office
Press Releases
No abstract provided.
Mustang Daily, May 27, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, May 24, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Academic Senate - Agenda, 5/24/2005, Academic Senate
Academic Senate - Agenda, 5/24/2005, Academic Senate
Academic Senate Agendas
No abstract provided.
Spaces Still Available At Ninth Annual Integrated Pest Management Conference At Cal Poly, Public Affairs Office
Spaces Still Available At Ninth Annual Integrated Pest Management Conference At Cal Poly, Public Affairs Office
Press Releases
No abstract provided.
Cal Poly Students Have Best Year Ever At Statewide Competition, Public Affairs Office
Cal Poly Students Have Best Year Ever At Statewide Competition, Public Affairs Office
Press Releases
No abstract provided.
Mustang Daily, May 11, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Mustang Daily, May 10, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.
Executive Committee - Agenda, 5/10/2005, Academic Senate
Executive Committee - Agenda, 5/10/2005, Academic Senate
Academic Senate Agendas
No abstract provided.
Mustang Daily, May 9, 2005
Cal Poly Student Newspaper
Student newspaper of California Polytechnic State University, San Luis Obispo, CA.