Life Sciences Commons^™

Vegetative Study At The Duck Field Research Facility, Duck, North Carolina, Gerald F. Levy

Biological Sciences Faculty Publications

The Duck Field Research Facility is located on the Outer Banks of North Carolina, a series of offshore sandbars extending from the Virginia- North Carolina border southward about 200 miles to Bogue Inlet, North Carolina. These bars lie almost parallel to the mainland and are separated from it by shallow sounds of varying widths.

The study area is included in Currituck Bank (North Bank), which extends from the Virginia-North Carolina boundary southward to the town of Nags Head, a distance of about 45 miles (Fig. 1). The bank was originally demarcated by two inlets; Old Currituck Inlet, which was located …

Genetic Variation In Scandinavian Brown Trout (Salmo Trutta L.): Evidence Of Distinct Sympatric Populations, Fred W. Allendorf, Nils Ryman, A. Stennek, G. Stahl

Biological Sciences Faculty Publications

Large differences in certain morphological traits between populations of brown trout (Salmo trutfa L.) in the lakes of northern Sweden led us to initiate an electrophoretic examination in an effort to understand the genetic structure of these populations. A total of 549 brown trout from four lakes were examined at 10 electrophoretically detected loci. Genetic variation was found at only three loci, coding for lactate dehydrogenase (LDH), alpha-glycerophosphate dehydrogenase (AGP), and creatine phosphokinase (CPK). A total absence of heterozygotes at the LDH-I locus in Lake Bunnersjoarna, coupled with significant correlations between LDH-I type and both CPK-I allele frequencies and …

Gene Duplication In The Family Salmonidae 111. Linkage Between Two Duplicated Loci Coding For Aspartate Aminotransferase In The Cutthroat Trout (Salmo Clarki), Fred W. Allendorf, Fred M. Utter

Biological Sciences Faculty Publications

The genetic control of the supernatant form of aspartate aminotransferase (AAT) was studied in the cutthroat trout (Salmo clarki) through a series of experimental matings. 509 individuals of eight families were examined to determine (1) the number of loci, (2) the mode of inheritance (i.e. disomic or tetrasomic), and (3) the linkage relationship of the loci involved. The variation observed is controlled by a duplicated locus resulting from a presumed tetraploid event of an ancestral salmonid. The inheritance experiments revealed .the presence of two disomic loci rather than a single tetrasomic locus. indicating that disomy has been reestablished …

Population Dynamics Of Microtus Ochrogaster In Eastern Kansas, Michael S. Gaines, Robert K. Rose

Biological Sciences Faculty Publications

Four eastern Kansas populations of the prairie vole, Microtus ochrogaster were live trapped from 1970—73 to gain insight into the population regulation of this species. All four populations exhibited a 2—yr cycle in numbers with peak densities generally occurring in June 1972. Peak densities were followed by a decline in numbers, a recovery, and a population crash in spring 1973. Reproductive parameters changed dramatically as density rose and fell. The summer breeding season in the crash year of 1973 was shortened by at least 3 mo. A reduction in breeding activity occurred during the summer of every year of the …

Delayed-Hypersensitivity Reactions Provoked By Ribosomes From Acid-Fast Bacilli - Physical Characteristics And Immunological Aspects Of Core Ribosomal-Proteins From Mycobacterium-Smegmatis, R. V. Loge, Walter E. Hill, Robert E. Baker, C. L. Larson

Biological Sciences Faculty Publications

No abstract provided.

Ribosomes Of Acid-Fast Bacilli - Immunogenicity, Serology, And In-Vitro Correlates Of Delayed-Hypersensitivity, Robert E. Baker, Walter E. Hill, C. L. Larson

Biological Sciences Faculty Publications

No abstract provided.

Resistance Of Mice To Infection With Friend Disease Virus After Subcutaneous Injection Of Friend Virus And Friend Spleen-Cells, C. L. Larson, R. N. Ushijima, S. K. Kasuga, Robert E. Baker, M. B. Baker

Biological Sciences Faculty Publications

No abstract provided.

Diurnal Distribution Of Phytoplankton From A Single Station At The Mouth Of The James River, Harold G. Marshall

Biological Sciences Faculty Publications

Eight sets of water samples were taken to a depth of 36 ft. during a 24-hr. period. A homogeneity was found in the vertical distribution of the total phytoplankton in samples from 7 of the 8 hydro-casts. Skeletonema costatum and Asterionella japonica were the most numerous phytoplankters in every sample, with the majority of their counts each exceeding 500, 000 cells per liter.

The Annual Distribution And Stratification Of Phytoplankton At Aurora Lake, Portage County, Ohio, Harold G. Marshall

Biological Sciences Faculty Publications

A 13-month study of a hard-water lake in northeast Ohio has provided a quantitative and qualitative record of the seasonal changes of the phytoplankton. Maximum production occurred during the summer and winter periods. The summer pulse was dominated by the cyanophyte species: Microcystis aeruginosa, Anabaena spiroides, A. circinalis, and Aphanizomenon flosaquae. The dominants of the winter pulse were the diatoms Fragilaria crotomensis and Asterionella formosa, which formed separate peaks under an ice cover in December and January, respectively. The January development extended into March with the highest concentrations for the year Being reached at approximately …

The Distribution Of Phytoplankton Along A 140 Mile Transect In The Chesapeake Bay, Harold G. Marshall

Biological Sciences Faculty Publications

The composition of phytoplankton progressively changed in the surface samples taken between Norfolk, Virginia and Cambridge, Maryland. These was an inverse relationship between the numbers of phytoplankters and zooplankters in the transect samples. Vertical stratification of the plankton was studied at two 24-hr, stations at the Great Wicomlco and Patuxent Rivers. The vertical centers of zooplankton and phytoplankton populations fluctuated over the study period and evidence is given to support a grazing phenomenon. Large concentrations of nannoplankters were found in all the plankton samples taken and is attributed to the collection procedure using the Van Dorn sampler.

Succession In A Dune Community At Mentor Headlands, Ohio, Harold G. Marshall

Biological Sciences Faculty Publications

Continual sand deposition on the Lake Erie shore, adjacent to the mouth of the Grand River, has led to the formation of a developing sand dune community and through the years a successional pattern of plant growth. An analysis was made of the general plant composition of the area by means of four transects directed from the bare beach inland. Definite zonation of specific plant species was present throughout the community in parallel formation. Named for the dominant plant types they contained, the major stages were: dune grass, poplar, aspen, and oak.