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Full-Text Articles in Life Sciences
Selective Feeding By Phyllostomid Fruit Bats In A Subtropical Montane Cloud Forest, David Herníndez-Conrique, Luis Iñiguez-Dávalos, Jay F. Storz
Selective Feeding By Phyllostomid Fruit Bats In A Subtropical Montane Cloud Forest, David Herníndez-Conrique, Luis Iñiguez-Dávalos, Jay F. Storz
Jay F. Storz Publications
Phyllostomid bats eat the fruits and disperse the seeds of a wide variety of neotropical plant species, particularly those typical of early successional stages (Fleming & Heithaus 1981, Heithaus 1982, Orozco-Segovia et al. 1985). In assessing the effects of frugivorous animals on plant populations and vice-versa, it is important to determine whether the animals are selective in the types of fruit they eat, or whether the proportional abundance of different fruit species in their diets simply reflects availability in the environment. The purpose of this study was to test experimentally the hypothesis that two common phyllostomid species, Sturnira ludovici and …
Relationships Between In Situ Protein Degradability And Grass Developmental Morphology, R. B. Mitchell, D. D. Redfearn, Lowell E. Moser, R. J. Grant, K. J. Moore, B. H. Kirch
Relationships Between In Situ Protein Degradability And Grass Developmental Morphology, R. B. Mitchell, D. D. Redfearn, Lowell E. Moser, R. J. Grant, K. J. Moore, B. H. Kirch
Department of Animal Science: Faculty Publications
The objective of this research was to determine the relationships between the morphological development and in situ ruminally degradable protein (RDP), ruminally undegradable protein (RUP), and microbial protein of two cool season grasses (intermediate wheatgrass and smooth bromegrass) and two warm season grasses (switchgrass and big bluestem). The initial growth of grass tillers grown near Mead, Nebraska was clipped at ground level six times during the 1992 growing season and morphologically classified. Mean stage was calculated. Forage was ground to pass a 2-mm screen and was incubated in ruminally fistulated steers for 16 h. The RUP was adjusted for microbial …
Coming To Terms With Heritability, Scott F. Stoltenberg
Coming To Terms With Heritability, Scott F. Stoltenberg
Department of Psychology: Faculty Publications
The complex mechanisms of heredity are little appreciated by nonspecialists, in some measure, because of misunderstandings that are perpetuated when words used for technical terms have other, more widely understood, folk meanings. When a word has both technical and folk meanings, it is the responsibility of the specialist to avoid promoting confusion by either using extremely cautious and precise language when using the term or, in cases when confusion is inevitable, abandoning the term in favor of one without a widely understood folk meaning. The study of heredity is beset by such confusion, and the term heritability appears to be …
Y-Chromosome Effects On Drosophila Geotaxis Interact With Genetic Or Cytoplasmic Background, Scott F. Stoltenberg, Jerry Hirsch
Y-Chromosome Effects On Drosophila Geotaxis Interact With Genetic Or Cytoplasmic Background, Scott F. Stoltenberg, Jerry Hirsch
Department of Psychology: Faculty Publications
Previously, all of the major fruit fly, Drosophila melanogaster, chromosomes (I, II, and III) have been shown to be associated with geotaxis, but the Y chromosome has not. Using two methods (back-crossing and chromosome substitution), Y chromosomes from lines that have evolved stable, extreme expressions of geotaxis were placed into different genetic and cytoplasmic backgrounds to test the resulting males for geotaxis. The results of the back-crossing do not support the interpretation of Y-chromosome effects on geotaxis. These tests do not have sufficient statistical power, however, to detect small genetic effects. In the chromosome substitution experiment, the geotaxis-line Y …
Parasite Biodiversity And Emerging Pathogens: A Role For Systematics In Limiting Impacts On Genetic Resources, Eric P. Hoberg
Parasite Biodiversity And Emerging Pathogens: A Role For Systematics In Limiting Impacts On Genetic Resources, Eric P. Hoberg
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
Emergence of pathogenic organisms continues as a threat to overall biodiversity and genetic resources. Macroparasites including helminths constitute a potential threat to economically important resources in agriculture and conservation biology. Limitation of this threat can be achieved through survey and inventory for biodiversity and the application of systematics to understand the host range , biogeography and history of faunas. Systematics constitutes the foundation for recognition of endemic and introduced elements of faunas and the basis for predicting the behavior of pathogens introduced to new ecological settings or host groups. The basis for emergence of pathogens has both a deep historical …