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Articles 1 - 4 of 4
Full-Text Articles in Ecology and Evolutionary Biology
A Cytochrome-B Perspective On Passerina Bunting Relationships, John Klicka, Adam J. Fry, Robert M. Zink, Christopher W. Thompson
A Cytochrome-B Perspective On Passerina Bunting Relationships, John Klicka, Adam J. Fry, Robert M. Zink, Christopher W. Thompson
Ornithology Program (HRC)
We sequenced the complete mitochondrial cytochrome-b gene (1,143 nucleotides) for representatives of each species in the cardinalid genera Passerina (6 species), Guiraca (1 species), and Cyanocompsa (3 species), and used a variety of phylogenetic methods to address relationships within and among genera. We determined that Passerina, as presently recognized, is paraphyletic. Lazuli Bunting (P. amoena) is sister to the much larger Blue Grosbeak (Guiraca caerulea). Indigo Bunting (P. cyanea) and Lazuli Bunting are not sister taxa as generally thought. In all weighted parsimony trees and for the gamma-corrected HKY tree, Indigo Bunting is …
An Ethical Framework For Interpreting The United States Endangered Species Act, Cathryn M. Elgin
An Ethical Framework For Interpreting The United States Endangered Species Act, Cathryn M. Elgin
UNLV Theses, Dissertations, Professional Papers, and Capstones
In this study I argue that a holistic approach is better than an individualistic approach for interpreting the United States Endangered Species Act (ESA). I propose that the use of a holistic ethical framework, based on fundamental environmental philosophy, is better in that it more effectively fulfills the ESA's goals of species and ecosystem conservation. Holistic ethics is based on concern for a community as a whole, while individualistic ethics is based on concern for the individual. A holistic approach, I argue, is more beneficial to nature than is an individualistic approach or other non-holistic approaches. I set up basic …
The Taxonomic Rank Of Spizella Taverneri: A Response To Mayr And Johnson, John Klicka, Robert M. Zink, Jon C. Barlow, W. Bruce Mcgillivray, Terry J. Doyle
The Taxonomic Rank Of Spizella Taverneri: A Response To Mayr And Johnson, John Klicka, Robert M. Zink, Jon C. Barlow, W. Bruce Mcgillivray, Terry J. Doyle
Ornithology Program (HRC)
Mayr and Johnson suggest that Spizella taverneri should be a subspecies of the biological species S. breweri, because it is possibly not reproductively isolated. We originally concluded that evidence from mitochondrial DNA sequences, habitat preferences, timing of breeding, vocalizations, and morphology supported the recognition of S. taverneri as a phylogenetic and biological species. Nothing in the commentary by Mayr and Johnson causes us to change that conclusion. We believe that it is probable that these two allopatric taxa are isolated. Contrary to Mayr and Johnson, we believe that more information is given by ranking S. taverneri as a species, because …
Recolonization Of The Flicker And Other Notes From Isla Guadalupe, Mexico, Paul R. Sweet, George F. Barrrowclough, John Klicka, Liliana Montanez-Godoy, Patricia Escalante
Recolonization Of The Flicker And Other Notes From Isla Guadalupe, Mexico, Paul R. Sweet, George F. Barrrowclough, John Klicka, Liliana Montanez-Godoy, Patricia Escalante
Ornithology Program (HRC)
During a visit to Isla Guadalupe from 31 May to 3 June 1996, we documented three species new to the island, the Barn Owl, Swainson's Thrush, and Hooded Oriole, and established first breeding records for the European Starling and Western Meadowlark. Red-shafted Flickers are now breeding on the island, representing a recent recolonization from the mainland following the extinction of the endemic population. We investigated the validity of Colaptes auratus rufipileus and concluded that it doesn’t meet the standard for phylogenetic species but differs from C. a. collaris at the 75% level usually associated with subspecific rank. Damage to the …