CHESSON, P. 1978. Predator-prey theory and variability. Ann. Rev. Ecol. Syst. 9:323-347. CURIO, E. 1976. The ethology of predation. Springer-Verlag, New York. DILL, L. M. 1983. Adaptive flexibility in the foraging behavior of fishes. Can. J. Fish. Aq. Sci. 40:398408. DUNBRACK, R. L., AND L. M. DILL.

Research Article| April 01, 1965 Genesis of the White Cloud and Related Pegmatites, South Platte Area, Jefferson County, Colorado C VANCE HAYNES, JR. C VANCE HAYNES, JR. Dept. Geology, University of Arizona, Tucson, Ariz. Search for other works by this author on: GSW Google Scholar GSA Bulletin (196

Individuals sometimes exhibit striking constancy to a single behaviour even when they are capable of short-term behavioural flexibility. Constancy enables animals to avoid costs such as memory constraints, but can also inflict significant opportunity costs through behaviour–environment mismatch. It

Two new species of harpellid gut fungi (Zygomycota: Trichomycetes) are described from the hindguts of mayfly nymphs inhabiting high altitude Rocky Mountain streams: the new genus and species Legeriosimilis tricaudata living in Ameletus sp. (Siphlonuridae), and the new species Glotzia coloradense fro

Wintertime supercooled liquid water (SLW) observations have been made over the Grand Mesa of Colorado from early 1983 through March 1985. Measurements were made with aircraft, microwave radiometers, and tower-mounted icing meters. Results of analyses of this large data set are summarized. It was fou

Abstract Nine serologic types of Clostridium tetani have been differentiated by means of the agglutination reaction as a result of the studies of Tulloch (1), Bauer (2), Fildes (3), Bauer and Meyer (4), Coleman and Meyer (5) and Coleman and Gunnison (6). As Felix and Robertson (7) have pointed out,

Ever since Yuma points were recognized as being particularly ancient, Yuma County, Colorado has been a logical area of interest. Nevertheless, until 1941 the county had received scant attention from professional archaeologists, with the sole exception of a partial surface survey by Dr. E. B. Renaud.

Water supply in the Colorado River could drop so far in the next decade that the ability of the Upper Colorado River Basin states – Colorado, Utah, Wyoming, and New Mexico – to meet their legal obligations to downstream users in Nevada, Arizona, California, and Mexico would be in grave jeopardy. Leg

The Colorado pikeminnow (Ptychocheilus lucius) is a federally endangered fish, which was once abundant and widespread in the Colorado River basin. During exotic fish removal sampling in the spring of 2003, 2004, and 2005, 2 Colorado pikeminnow were collected upstream of critical habitat in the Yampa

The loss of aboveground plant diversity alters belowground ecosystem function; yet, the mechanisms underpinning this relationship and the degree to which plant community structure and climate mediate the effects of plant species loss remain unclear. Here, we explored how plant species loss through e

Representativeness and quality of collected meteorological data impact accuracy and precision of climate, hydrological, and biogeochemical analyses and predictions. We developed a comprehensive Quality Assurance (QA) and Quality Control (QC) statistical framework, consisting of three major phases: P

Journal Article Vocalizations of the Long-Tailed Weasel (Mustela frenata) Get access Gerald E. Svendsen Gerald E. Svendsen Department of Zoology, Ohio University, Athens, Ohio 45701The Rocky Mountain Biological Laboratory, Gothic-Crested Butte, Colorado 81224 Search for other works by this author on

AbstractHuman activities have substantially increased atmospheric nitrogen (N) deposition in ecosystems worldwide, often leading to higher plant quality for herbivores and greater herbivory. Predators frequently suppress herbivores and indirectly benefit plants via “trophic cascades”, and the streng

An important, long-lasting role of the natal environment on reproductive site selection is suggested, and the conditions experienced in early development can strongly affect reproductive behaviors across the life cycle, as well as differences in philopatry based on natal pond.

Geographic and ecologic relationships among the four species of pocket gophers that occur in Colorado have stimulated considerable interest (see, for example, Miller, 1964), but much remains to be learned about their distribution and natural history. The purposes of this note are to report new distr

Owing to sex-specific reproductive strategies, the mean and variance in annual offspring production may differ between the sexes. In addition, there may be sex-specific changes in reproductive performance with age (e.g. senescence). We used 20 and 50 years of longitudinal data on male and female yel

Feeding in the Perlodidae and Chloroperlidae may, therefore, be important for survival and possibly for the final stages of egg development in the population dynarnics of aquatic insects.

Spatiotemporal patterns of phenology may be affected by mosaics of environmental and genetic variation. Environmental drivers may have temporally lagged impacts, but patterns and mechanisms remain poorly known. We combine multiple genomic, remotely sensed, and physically modeled datasets to determin