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Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam, Timothy C. Williams , '64, J. M. Williams
Radar And Visual Observations Of Autumnal (Southward) Shorebird Migration On Guam, Timothy C. Williams , '64, J. M. Williams
Biology Faculty Works
Several species of shorebirds migrate between eastern Asia and the southern Pacific islands, Australia, and New Zealand. Observations made from Guam (13°25′N, 144°45′E) during autumn 1983 indicate that a significant number of birds take a direct route over the western Pacific Ocean. Radar observations and ground counts of migrants on Guam showed two periods of autumnal migratory activity. The first, largely adult birds, was in August and September. The second, largely juveniles, was in late September and October. Radar indicated that large numbers of birds passed over the island to the south with no evidence of compensation for drift by …
Phenotypic Assortment In Tetrahymena Thermophila: Assortment Kinetics Of Antibiotic-Resistance Markers, Tsa, Death, And The Highly Amplified Rdna Locus., E. Virginia Merriam, P.J. Bruns
Phenotypic Assortment In Tetrahymena Thermophila: Assortment Kinetics Of Antibiotic-Resistance Markers, Tsa, Death, And The Highly Amplified Rdna Locus., E. Virginia Merriam, P.J. Bruns
Biology Faculty Works
Phenotypic assortment in Tetrahymena thermophila results from random distribution of alleles during amitotic division of the macronucleus. The rate of assortment is dependent on input ratio and the number of assorting units. The assortment of the antibiotic resistance markers Chx, Mpr and gal was determined and is consistent for each with the model of 45 assorting chromosomes. The gene tsA (previously ts-1) shows normal assortment, in contrast to previous reports. A mutation in the highly amplified ribosomal locus (rdnA2) assorts as if present at only 45 copies. Death of clones occurred at a rate consistent with assortment for a single …
Cellular Politics: Ernest Everett Just, Richard B. Goldschmidt, And The Attempt To Reconcile Embryology And Genetics, Scott F. Gilbert
Cellular Politics: Ernest Everett Just, Richard B. Goldschmidt, And The Attempt To Reconcile Embryology And Genetics, Scott F. Gilbert
Biology Faculty Works
No abstract provided.