Life Sciences Commons^™

'Eve' In Africa: Human Evolution Meets Molecular Biology, Robert D. Seager

Faculty Publications

Recent advances in the study of human origins have increased our understanding of our ancestors. There have been new, major fossil finds. WT 17000, a 2.5 million-year-old robust Australopithecus found in Kenya (Walker et al. 1986), led to a revision of early hominid phylogeny (Delson 1986; 1987). Existing fossil materials have been reassessed. For example, Tattersall (1986) maintains that at least two unrecog­- nized hominid species (Homo neanderthalensis, H. hei­ delbergensis and possibly H. steinheimensis ) existed be­ tween the times of H . erectus and fully modern H . sapiens.

Mississippi’S Furniture Industry Provides A Market For Forest Products, Steven H. Bullard

Faculty Publications

If you own timberland in Mississippi that has a hardwood component, you definitely should be interested in the furniture industry and the outlook for the use of wood in this market. The furniture industry provides a ready market for high quality hardwoods, as well as for lower quality hardwood timber; the outlook for the use of wood of both types is very favorable - particularly in the production of upholstered and non-upholstered furniture for household use.

Thinning And Harvesting Regimesf Or Yellow-Poplar, Gary D. Kronrad, C. Franklin, D. Hazel, R. Rucker

Faculty Publications

Grade I yellow-popular logos were recently selling for $150/mbf, three times the price for grade 2 logs in North Carolina. A computerized stand development model was used to examine the profitability of thinning and holding yellow poplar stands for increased diameter and grade. Analyses were done over wide ranges in stand age, site quality, and stocking, at 5% and 10% discount rates. At a 5% discount rate, the maximum net present stumpage value was obtained by thinning in most regimes. Lower stand age, higher initial stocking, and higher site indices favored thin-clearcut regimes over regimes with no initial thinning. At …

Red-Cockaded Woodpeckers Vs Rat Snakes: The Effectiveness Of The Resin Barrier, D. Craig Rudolph, Howard Kyle, Richard N. Conner

Faculty Publications

Red-cockaded Woodpeckers (Picoides borealis) excavate resin wells in the immediate vicinity of roost and nest cavity entrances. Resin wells are worked regularly, resulting in a copious and persistent resin flow that coats the tree trunk, especially below cavity entrances. Red-cockaded Woodpeckers also scale loose bark from cavity trees and closely adjacent trees. These two behaviors result in smooth, sticky surfaces surrounding cavity entrances. Climbing experiments on cavity, scaled, and control trees using rat snakes (Elaphe obsoleta) demonstrate that these behaviors produce a resinous barrier that is highly effective in preventing predatory snakes from gaining access to active Red-cockaded Woodpecker cavities.

Experimental Reintroduction Of Red-Cockaded Woodpeckers, D. Craig Rudolph, Howard Kyle, Richard N. Conner

Faculty Publications

The Red-cockaded Woodpecker (Picoides borealis) is an endangered species endemic to the pine forests of the southeastern United States (Jackson 1971). Deforestation and habitat alteration have severely affected Red-cockaded Woodpecker populations; current populations are isolated and most are declining (Jackson 1971, Lennartz et al. 1983, Conner and Rudolph 1989, Costa and Escano 1989). The species has been extirpated from significant areas of suitable or potentially suitable habitat.

Trends Of Hardwood Lumber Use In Making Household Furniture., Steven H. Bullard

Faculty Publications

Hardwood lumber has long been a "mainstay" raw material for U.S. furniture makers. Its importance relative to other raw materials, however, has changed significantly during the past 40 to 50 years.

The Geography Of Home Furnishings Sales In The U.S., Steven H. Bullard

Faculty Publications

Sales by U.S. "furniture and home furnishings" stores were nearly $75 billion in 1987, the year of the most recent Census of Retail Trade. The sales total includes $26 billion for "furniture" stores, $16 billion for "homefurnishings" stores, $8 billion for "household appliance" stores, and $24 billion for "radio, television, computer, and music" stores.

The 1987 Census of Retail Trade reports sales for the combined category, furniture and home furnishings, for all U.S. states, counties, and metropolitan areas. In this article, therefore, the term "furniture and home furnishings" refers to combined sales for all of the store types in Table …

Resistance-Training Techniques, L Kravitz, C J. Cisar

Faculty Publications

No abstract provided.

Adaptive Coloration In Texas Fiddler Crabs (Uca), Carl L. Thurman

Faculty Publications

Five species of fiddler crabs occupy a variety of intertidal niches along the Texas coast. Each Uca is adapted to a specific array of physical factors in the environment. Some aspects of their adaptations are reflected by body color. Interspecific differences in morphological coloration are correlated with camouflage and substrate characteristics. Intraspecific color variation is expressed through neurosecretion-mediated physiological change in cellular pigment distribution. Adaptation to a dark or light colored background reveals different "secondary" chromomotor capabilities for each species. In addition, pigments in melanophores, leucophores and erythrophores exhibit circadian rhythms of dispersion and aggregation.

During a "primary" chromomotor response …