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Full-Text Articles in Life Sciences
Repellent Activity Of The Secretion Of Edessa Rufomarginata, A Neotropical Pentamid, Jerome J. Howard
Repellent Activity Of The Secretion Of Edessa Rufomarginata, A Neotropical Pentamid, Jerome J. Howard
Biological Sciences Faculty Publications
No abstract provided.
Going To Extremes: Why Do Sanderlings Migrate To The Neotropics?, J. P. Myers, John L. Maron, Michel Sallaberry A.
Going To Extremes: Why Do Sanderlings Migrate To The Neotropics?, J. P. Myers, John L. Maron, Michel Sallaberry A.
Biological Sciences Faculty Publications
Sanderlings (Calidris alba) breed within a small latitudinal range in the arctic while spreading in winter virtually throughout temperate and tropical marine beaches of the world. This paper examines spatial variation in Sanderlings nonbreeding density across the New World, documents annual cycle differences between populations wintering in California and those wintering in Peru and Chile, and then explores demographic and ecological factors underlying Sanderlings migration to different wintering grounds. Densities during the nonbreeding season are higher on the Pacific coast than on the Atlantic at all censused latitudes in the New World, and reach a peak in southwestern …
Seasonal Changes In Feeding Success, Activity Patterns, And Weights Of Nonbreeding Sanderlings (Calidris Alba), John L. Maron, J. P. Myers
Seasonal Changes In Feeding Success, Activity Patterns, And Weights Of Nonbreeding Sanderlings (Calidris Alba), John L. Maron, J. P. Myers
Biological Sciences Faculty Publications
Seasonal changes in Sanderling (Calidris alba) feeding success, time budgets, and weights were followed throughout the nonbreeding season at Bodega Bay, California. Sanderlings spent more time roosting in fall than in winter, and in fall adults spent more time roosting than juveniles. Sanderling prey capture rates were high in fall and spring and declined through winter. Sanderling weights paralleled seasonal changes in feeding success and activity patterns: birds were heaviest in fall and spring and lightest in winter. These results reflect lowered food availability in winter and imply that birds may have difficulty balancing their energy budgets during …
Structure And Surface Exposure Of Protein-Iis Of Neisseria-Gonorrhoeae Js3, Ralph C. Judd
Structure And Surface Exposure Of Protein-Iis Of Neisseria-Gonorrhoeae Js3, Ralph C. Judd
Biological Sciences Faculty Publications
Colonies of Neisseria gonorrhoeae JS3, each bearing a predominate protein II (PII) type, were derived from a progenitor transparent colony. Five distinct PIIs were identified and isolated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. The PII bands were excised from gels of unlabeled whole cells and from gels containing lysates of surface-radioiodinated bacteria. These were subjected to alpha-chymotrypsin digestion and two-dimensional peptide mapping, which allowed for a comparison of both the primary structures of the PIIs and the identification of surface-exposed regions of the molecules. The results demonstrated that PIIs are unrelated to either Protein I or Protein III in structure …
Seasonal-Changes In The Habitat Distribution Of Transient Insectivorous Birds In Southeastern Arizona: Competition Mediated, Richard L. Hutto
Seasonal-Changes In The Habitat Distribution Of Transient Insectivorous Birds In Southeastern Arizona: Competition Mediated, Richard L. Hutto
Biological Sciences Faculty Publications
The distribution and abundance of 26 migratory insectivorous bird species were recorded over an elevational habitat gradient in the Chiricahua Mountains, Arizona for the spring and fall migratory seasons. Most of the species used this area only during migratory passage, and 54% exhibited significant shifts in the habitats occupied from spring to fall. The majority (69%) of species also exhibited significant changes in density within habitats between seasons. Using pairwise correlations of bird densities from 7 habitat types and 2 seasons, I identified 5 groups that contained species whose seasonal distributional patterns were similar to one another but independent and …
Community Ecology, Robert K. Rose, Elmer C. Birney
Community Ecology, Robert K. Rose, Elmer C. Birney
Biological Sciences Faculty Publications
COMMUNITIES with Microtus tend to be structurally simple, usually grasslands or tundra, and to have no more than two species of Microtus and rarely more than six species of small mammals. Microtus often dominates both numerically and in total small mammal biomass, especially at higher latitudes. The small mammal community is most influenced by Microtus through its fluctuations in density, and thus also in biomass, by its relatively high level of diurnal activity, and by its year-round activity. Other species of small mammals may be adversely affected because Microtus usually is larger and behaviorally dominant and also because the mere …