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Full-Text Articles in Life Sciences
Chemical Leaf Repellency To An Attine Ant: Seasonal Distribution Among Potential Host Plant Species, Jerome J. Howard
Chemical Leaf Repellency To An Attine Ant: Seasonal Distribution Among Potential Host Plant Species, Jerome J. Howard
Biological Sciences Faculty Publications
The chemical repellency of leaves to the leaf-cutting, fungus-growing ant Atta cephalotes was surveyed for 42 plant species randomly selected from the dry forest of Santa Rosa National Park, Guanacaste, Costa Rica. The sample represents about one-sixth of the potential host plant species available to the ants in the secondary, semideciduous forest at Santa Rosa. Repellencies of leaf extracts were measured by bioassay. A laboratory colony of A. cephalotes collected from Santa Rosa was used. Three-quarters of the species exhibited significantly repellent nonpolar (lipid-soluble) extractables (e.g., terpenoids, steroids, and waxes), and half of the species exhibited repellent polar extractables (e.g., …
Factors Affecting Nest Site Location In Gila Woodpeckers, Jerome J. Korol, Richard L. Hutto
Factors Affecting Nest Site Location In Gila Woodpeckers, Jerome J. Korol, Richard L. Hutto
Biological Sciences Faculty Publications
We investigated the locations of Gila Woodpecker (Melanerpes uropygialis) nest sites in Organ Pipe Cactus National Monument, Arizona. A significantly greater proportion of saguaro cacti in arroyos had woodpecker holes than did those on hillsides, ridgetops or desert flats. Saguaros used for nest-hole excavation were taller and more likely to have branches than randomly chosen saguaros. Both active and inactive nest holes were nonrandomly oriented, with the mean vectors of orientation being in northwesterly directions. Variation in nest-hole orientation probably is not due to seasonal differences in excavations because the orientation of spring active (late March) nest holes was not …
Crystallization Of The Gene 45 Protein From The Dna Replication Fork Of Bacteriophage T4, C. Thaller, B. Alberts, E. Goldsmith, S. Sprang, R. Fletterick
Crystallization Of The Gene 45 Protein From The Dna Replication Fork Of Bacteriophage T4, C. Thaller, B. Alberts, E. Goldsmith, S. Sprang, R. Fletterick
Biological Sciences Faculty Publications
The gene 45 protein from bacteriophage T4 has been purified and is crystallized. This protein is part of the T4 DNA replication complex. The crystallized protein is active in complementation assays. X-ray diffraction analysis is in progress; data are measured for the native and several heavy atom derivatives. The crystals diffract to about 3.5-Å resolution.
Superior Developmental Stability Of Heterozygotes At Enzyme Loci In Salmonid Fishes, Robb F. Leary, Fred W. Allendorf, Kathy L. Knudsen
Superior Developmental Stability Of Heterozygotes At Enzyme Loci In Salmonid Fishes, Robb F. Leary, Fred W. Allendorf, Kathy L. Knudsen
Biological Sciences Faculty Publications
No abstract provided.
The Pan American Shorebird Program: A Progress Report, J. P. Myers, Gonzalo Castro, Brian Harrington, Marshall Howe, John L. Maron, Enrique Ortiz, Michel Sallaberry A., C. T. Schick, Elier Tablio
The Pan American Shorebird Program: A Progress Report, J. P. Myers, Gonzalo Castro, Brian Harrington, Marshall Howe, John L. Maron, Enrique Ortiz, Michel Sallaberry A., C. T. Schick, Elier Tablio
Biological Sciences Faculty Publications
No abstract provided.