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Creator:: Dumas, Philip Conrad
Resource Type:: Dissertation
Full Text:: by PHILIP CONRAD DUMAS A ThESIS submitted to OREGON STATE COLLEGE in parti&1 fulfillment of

Creator:: Johnson, Oliver William
Resource Type:: Masters Thesis
Full Text:: ° and 34°, and Dumas (9, p. 488) who recorded time to death at 26°, 28°, 32° and 36° for Plethodon

Creator:: Brodie, Edmund D.
Abstract:: The western Plethodon include vandykei vandykei, v. idahoensis, larselli, dunni,vehiculum, stormi, elongatus, and an undescribed form referred to as the "unstriped" Plethodon. These salamanders have been placed into three species groups: the Vandykei group, the Vehiculum group, and the Elongatus group. Range maps are provided and geographic variation is discussed...
Resource Type:: Dissertation
Full Text:: animals for me, among the most active were: Jeffery Briggs, Thomas Darrow, Thorston Henrich, Conrad Hodson

Creator:: Haertel, John David
Abstract:: Experimental crosses between Rana pretiosa pretiosa Baird and Girard and Rana cascadae Slater, resulted in viable hybrids. Reciprocal differences at the time of fertilization are indicated. A high level of success in producing viable hybrids can be obtained if Rana pretiosa pretiosa is the female of the parent species, The...
Resource Type:: Masters Thesis
Full Text:: . Dumas, Philip C. Studies of the Rana species complex of the Pacific Northwest. Copeia, 1966, p. 60 -74

Creator:: Altig, Ronald Gail
Abstract:: Developmental series of Rana pretiosa (110 specimens), R. cascadae (100 specimens) and R. aurora (115 specimens) were bone stained and cleared in glycerin. The growth and developmental patterns of the skull and selected bones were followed from the first appearance of bone through adult stages. The sequential appearance of the...
Resource Type:: Dissertation
Full Text:: pretiosa (Dunlap, 1955; Dumas, 1966) Johnson (ibid. ) examined external development and physiological

Creator:: Haertel, John David
Abstract:: The karyotypes of five species of ranid frogs were determined from metaphase plates of bone marrow cells. The colchicine, hypotonic- citrate, blaze-dry technique was used to obtain the plates. Morphometric datawere obtained from the karyotypes and compared with other species of the genus Rana. Like most other members of the...
Resource Type:: Dissertation
Full Text:: . Systematic Zoology 16:38 -43. 28 Dumas, Philip C. 1966. Studies of the Rana species complex in the

Creator:: Sype, William E.
Abstract:: The breeding habits and embryonic thermal requirements of the Cascade frog of Oregon, Rana cascadae Slater, are described. The limits of temperature tolerance of the pre-feeding stages are from 6° to 27°C for embryos held at constant temperatures. However, for pre-feeding embryos exposed at different developmental stages for short durations...
Resource Type:: Dissertation
Full Text:: Barbour (63) in reducing cascadae to a subspecies of Rana aurora. Altig (3), Dunlap (13) and Dumas (12

Creator:: Nussbaum, Ronald A.
Abstract:: Dicamptodon is the single, extant genus of the ambystomatid subfamily Dicamptodontinae. Two species, D. ensatus (Eschscholtz) and D. copei Nussbaum are recognized. D. ensatus is found in the forested, mountain regions of northwestern California and western Oregon, in the Willapa Hills and Cascade Mountains of Washington, in extreme southwestern British...
Resource Type:: Dissertation
Full Text:: during the past three years. I am indebted to Dr. Philip C. Dumas for the loan of electrophoretic

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