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Feeding Interrelations Of Native Fishes In A Sonoran Desert Stream, Donald C. Schreiber, W. L. Minckley
Feeding Interrelations Of Native Fishes In A Sonoran Desert Stream, Donald C. Schreiber, W. L. Minckley
Great Basin Naturalist
Native fishes in Aravaipa Creek, Arizona, cropped foods proportional to abundance of those foods within the system. Ephemeropteran nymphs and adults comprised the major prey of 5 of 7 fishes (Gila robusta, Meda fulgida, Rhinichthys osculus, Tiaroga cobitis, and Catostomus insignis). The omnivorous Agosia chrysogaster ate almost as many nymphal mayflies as did the carnivores. Pantosteus clarki was herbivorous, taking animals only when they were abundant. When ephemeropterans decreased in abundance, a shift by some fish species occurred to other locally or seasonally abundant items. Other fishes continued to feed upon the same foods throughout the year. Abundance …
Summer Food Habits Of Coyotes In Central Wyoming, Joseph Tucker Springer, J. Steven Smith
Summer Food Habits Of Coyotes In Central Wyoming, Joseph Tucker Springer, J. Steven Smith
Great Basin Naturalist
Summer food habits of coyotes (Canis latrans) were investigated on a 3100-km2 area in central Wyoming, divided into one deer-use area and five non-deer areas. Analysis of 404 scats (fecal samples) revealed an overall average of 63 percent occurrence of native ungulates, 63 percent leporids, 46 percent rodents, 14 percent livestock, and 11 percent birds. Pronghorn (Antilocapra Americana) was the ungulate most frequently consumed, occurring in about 87 percent of the scats. Mule deer (Odocoileus hemionus) occurred in only 8 percent, and in 5 percent the native ungulate remains were not identifiable beyond …
Contributions To The Life History Of Sacramento Perch, Archoplites Interruptus, In Pyramid Lake, Nevada, Steven Vigg, Paul A. Kucera
Contributions To The Life History Of Sacramento Perch, Archoplites Interruptus, In Pyramid Lake, Nevada, Steven Vigg, Paul A. Kucera
Great Basin Naturalist
During a two-year period (1976–1977), 180 Sacramento perch (Archoplites interruptus) were sampled from Pyramid Lake, Nevada, on a monthly basis using several capture methods in all lake areas. Age and growth determinations of these fish were inconsistent with previous research on this species. Sacramento perch are entirely carnivorous, adults feeding primarily on tui chub (Gila bicolor). Fish accounted for 6 percent of the diet (by volume) of Sacramento perch less than 300 mm fork length, and 98 percent for those exceeding 300 mm. Amphipods, Odonata, and Chironomidae composed 6.3, 5.7, and 1.8 percent, respectively, of the …
Bird Community Composition In Relation To Habitat And Season In Betatakin Canyon, Navajo National Monument, Arizona, Jack D. Brotherson, Lee A. Szyska, William E. Evenson
Bird Community Composition In Relation To Habitat And Season In Betatakin Canyon, Navajo National Monument, Arizona, Jack D. Brotherson, Lee A. Szyska, William E. Evenson
Great Basin Naturalist
Bird species density, diversity, and species richness in relation to habitat and seasonal variations were studied in the Betatakin Canyon area of Navajo National Monument, Arizona. The two most prominent habitat types are a riparian forest deep in the canyon bottom and a mature pinyon-juniper woodland on the mesas and slopes above the canyon. One hundred thirty-five species of birds were encountered during the study and recorded by season and habitat. The avifauna assemblages demonstrate definite habitat selection into groups associated with the riparian and pinyon-juniper woodland communities. Diversity, density, and species richness were greatest in the riparian habitat during …
The Invertebrate Fauna Of The Caves Of The Uinta Mountains, Northeastern Utah, Stewart B. Peck
The Invertebrate Fauna Of The Caves Of The Uinta Mountains, Northeastern Utah, Stewart B. Peck
Great Basin Naturalist
Seven large caves in the Uinta Mountains, Utah, were surveyed for their invertebrate faunas. Thirty-eight species were found, and 30 of these are typical cave inhabitants. Diptera are the predominant group. Cave-restricted species are an amphipod, two diplurans, and possibly a Rhagidia mite. The caves were probablv uninhabitable in the past glacial because of severe periglacial environmental conditions, and the faunas have moved into the present cave sites since deglaciation of the Uintas.
A Checklist Of The Alpine Vascular Flora Of The Teton Range, Wyoming, With Notes On Biology And Habitat Preferences, John R. Spence, Richard J. Shaw
A Checklist Of The Alpine Vascular Flora Of The Teton Range, Wyoming, With Notes On Biology And Habitat Preferences, John R. Spence, Richard J. Shaw
Great Basin Naturalist
A checklist of the vascular flora of the alpine zone (treeless vegetation above 9500 feet or 2900 m) of the Teton Range is presented. For each of the 216 species, six attributes are listed: flower color and shape, pollination mode, life form, habitat preference, and whether each species is found in the Arctic. White and yellow flowered species are most common, and zoophilous species greatly predominate over anemophilous and apomictic species. Perennial/biennial herbs are the most common life form. Common habitats in the alpine zone include dry and wet meadows, bogs, debris accumulations, and cliffs and rock faces. Arctic species …
Some Spatial And Behavioral Features Of The Thirteen-Lined Ground Squirrel, Tim W. Clark
Some Spatial And Behavioral Features Of The Thirteen-Lined Ground Squirrel, Tim W. Clark
Great Basin Naturalist
Some relationships between home range, agonistic behavior, and reproductive patterns in thirteen-lined ground squirrels were investigated in Laramie Plains, Wyoming (August 1966–April 1969). Population size and densities fluctuated seasonally and annually. Adult male (N = 7) home ranges averaged 0.24 ha and were smaller than those of the female (N = 9), which averaged 0.35 ha. Agonistic interactions were more frequent during the natal period (late May–June) than during the breeding-gestation period (mid April–May). Most squirrels (86 percent) shared capture sites and had overlapping home ranges. However, a certain degree of spacing existed because of agonistic behavior.
Compositional Similarity Within The Oakbrush Type In Central And Northern Utah, L. M. Kunzler, K. T. Harper, D. B. Kunzler
Compositional Similarity Within The Oakbrush Type In Central And Northern Utah, L. M. Kunzler, K. T. Harper, D. B. Kunzler
Great Basin Naturalist
Indices of similarity were used to evaluate the similarity of oakbrush stands throughout the Uinta National Forest and to compare oak communities in central and northern Utah. Results show that Gambel oak stands in central Utah differ significantly among themselves in respect to quantitative aspects of the vegetation. Those differences can be correlated with elevation, slope exposure, and fire history. Nevertheless, there is currently inadequate justification for recognizing more than one habitat type for the species in the study area. There is a need to develop a model capable of predicting growth rate of oak on specific sites.