Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 7 of 7
Full-Text Articles in Entire DC Network
Multi-Ideal-Adic Completions Of Noetherian Rings, William J. Heinzer, Christel Rotthaus, Sylvia Wiegand
Multi-Ideal-Adic Completions Of Noetherian Rings, William J. Heinzer, Christel Rotthaus, Sylvia Wiegand
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Let R be a commutative ring with identity. A filtration on R is a decreasing sequence {In}∞ n=0 of ideals of R. Associated to a filtration is a well-defined completion R ∗ = l←i−mn R/In and a canonical homomorphism ψ : R → R ∗ [13, Chap. 9]. If ∞ n=0 In = (0), then ψ is injective and R may be regarded as a subring of R ∗ [13, p. 401]. In the terminology of Northcott, a filtration {In}∞ n=0 is multiplicative if I0 = R and InIm ⊆ In+m for all m ≥ 0 and n ≥ 0 …
Flower Power: Tree Flowering Phenology As A Settlement Cue For Migrating Birds, Laura J. Mcgrath, Charles Van Riper Iii, Joseph J. Fontaine
Flower Power: Tree Flowering Phenology As A Settlement Cue For Migrating Birds, Laura J. Mcgrath, Charles Van Riper Iii, Joseph J. Fontaine
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
1.Neotropical migrant birds show a clear preference for stopover habitats with ample food supplies; yet, the proximate cues underlying these decisions remain unclear. 2.For insectivorous migrants, cues associated with vegetative phenology (e.g. flowering, leaf flush, and leaf loss) may reliably predict the availability of herbivorous arthropods. Here we examined whether migrants use the phenology of five tree species to choose stopover locations, and whether phenology accurately predicts food availability. 3.Using a combination of experimental and observational evidence, we show migrant populations closely track tree phenology, particularly the flowering phenology of honey mesquite (Prosopis glandulosa), and preferentially forage in …
The Role Of Protected Areas As Bird Stop-Over Habitat: Ecology And Habitat Utilization By Migrating Land Birds Within Colorado River Riparian Forests Of Southwestern North America, Charles Van Riper Iii, Kristina L. Paxton, Carena J. Van Riper, Kimberly A. Van Riper, Laura Mcgrath, J. J. Fontaine
The Role Of Protected Areas As Bird Stop-Over Habitat: Ecology And Habitat Utilization By Migrating Land Birds Within Colorado River Riparian Forests Of Southwestern North America, Charles Van Riper Iii, Kristina L. Paxton, Carena J. Van Riper, Kimberly A. Van Riper, Laura Mcgrath, J. J. Fontaine
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
In southwestern North America, riparian habitats have declined precipitously in the last century both within and outside protected areas such as national parks,U.S. Fish and Wildlife Service refuges, and Bureau of Land Management and biosphere reserve lands. These declines are primarily due to anthropogenic perturbations such as alterations in river flow regimes, agricultural conversion, livestock grazing, and urban expansion (Webb et al. 2003). In the southwestern United States and northwestern Mexico the decline of riparian habitat and loss of native cottonwood (Populus fremontii), willow (Salix gooddingii) gallery forests, and adjacent mesquite (Prosopis sp.) bosques has …
A Simple Model For Predicting Survival Of Angler-Caught And Released Largemouth Bass, Gene R. Wilde, Kevin L. Pope
A Simple Model For Predicting Survival Of Angler-Caught And Released Largemouth Bass, Gene R. Wilde, Kevin L. Pope
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
We conducted a controlled experiment in the laboratory to assess the influence of anatomical hooking location and water temperature on survival of angler-caught and released largemouth bass Micropterus salmoides. Survival was 98% (58 of 59 fish) among fish that were hand-hooked within the oral cavity (including the gills), whereas survival was 66% (33 of 50 fish) among fish that were hand-hooked in the esophagus. Survival of hooked fish was not significantly influenced by water temperature (7–27 °C) or the hooking location × water temperature interaction. We combined our results with prior research to develop a predictive model of largemouth bass …
Lure-Size Restrictions In Recreational Fisheries, Gene R. Wilde, Kevin L. Pope, Bart W. Durham
Lure-Size Restrictions In Recreational Fisheries, Gene R. Wilde, Kevin L. Pope, Bart W. Durham
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
We conducted angling experiments to examine the potential use of lure-size restrictions to effect or reinforce length limits. We used four sizes of lures and five color patterns to assess effects of lure size and color on the number and length of largemouth bass (Micropterus salmoides) captured by angling. There was a significant (F = 12.03; df = 1, 177; P = 0.0007) lure-size effect on the total length (TL) of captured largemouth bass. Catch rates of fish ≥305-mm TL ranged from 0 to 0.5 fish per hour and were unrelated to lure size. Lure color pattern had …
Development And Evaluation Of A Bioenergetics Model For The Inland Silverside In Freshwater Systems, Christopher J. Chizinski, Caleb G. Huber, Kevin L. Pope
Development And Evaluation Of A Bioenergetics Model For The Inland Silverside In Freshwater Systems, Christopher J. Chizinski, Caleb G. Huber, Kevin L. Pope
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Consumption and respiration parameters were fit for inclusion in a bioenergetics model developed to predict the growth of the inland silverside Menidia beryllina. Although this model accurately predicted inland silverside growth through the initiation of spawning, it failed to predict the growth of reproductively active inland silversides. Model simulations provided initial evidence that a single model cannot predict the lifetime growth patterns of this species. Instead, a two-stage model is probably necessary to account for the physiological differences between the prespawning and active-spawning stages. In addition, the bioenergetics models of short-lived (life span,< 2 years) fishes may need to include a better means for assessing the direct energy expenditure for reproduction.
Power Laws, Discontinuities And Regional City Size Distributions, Ahjond S. Garmestani, Craig R. Allen, Colin M. Gallagher
Power Laws, Discontinuities And Regional City Size Distributions, Ahjond S. Garmestani, Craig R. Allen, Colin M. Gallagher
Nebraska Cooperative Fish and Wildlife Research Unit: Staff Publications
Urban systems are manifestations of human adaptation to the natural environment. City size distributions are the expression of hierarchical processes acting upon urban systems. In this paper, we test the entire city size distributions for the southeastern and southwestern United States (1990), as well as the size classes in these regions for power law behavior. We interpret the differences in the size of the regional city size distributions as the manifestation of variable growth dynamics dependent upon city size. Size classes in the city size distributions are snapshots of stable states within urban systems in flux.