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Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
Influence Of Habitat Use-Patterns On Cooperative Breeding In The Brown-Headed Nuthatch., Brent Burt, Albert Herb
Influence Of Habitat Use-Patterns On Cooperative Breeding In The Brown-Headed Nuthatch., Brent Burt, Albert Herb
Faculty Publications
Documenting the habitat use patterns of the Brown-headed Nuthatch, we describe how its habitat use patterns contribute to ecological constraints that may maintain cooperative breeding in this species.
Effect Of Harvest And Effective Population Size On Genetic Diversity In A Striped Bass Population, Marilyn Diaz, David S. Wethey, James Bulak, Bert Ely
Effect Of Harvest And Effective Population Size On Genetic Diversity In A Striped Bass Population, Marilyn Diaz, David S. Wethey, James Bulak, Bert Ely
Faculty Publications
A major factor that contributes to loss of genetic variation in natural populations is a small effective population size. In species with a complex life history that involves overlapping generations and delayed maturity, the impact of infrequent annual reproductive bottlenecks is likely to be small because effective population size is defined by the number of individuals contributing to a generation and not to a single year-class. The striped bass Morone saxatilis is a longlived species with overlapping generations and age structure, whose recreational and commercial importance has made it a target of intense harvest.We analyzed allele frequency fluctuation among juvenile …
Dna Binding Properties Of The Arabidopsis Floral Development Protein Aintegumenta, Staci Nole-Wilson, Beth A. Krizek
Dna Binding Properties Of The Arabidopsis Floral Development Protein Aintegumenta, Staci Nole-Wilson, Beth A. Krizek
Faculty Publications
The Arabidopsis protein AINTEGUMENTA (ANT) is a member of a plant-specific family of transcription factors (AP2/EREBP) that share either one or two copies of an approximately 70 amino acid region called the AP2 repeat. DNA binding activity has been demonstrated previously for members of this family containing a single AP2 repeat. Using an in vitro selection procedure, the DNA binding specificity of the two AP2 repeat containing protein ANT was found to be 5'-gCAC(A/G)N(A/T)TcCC(a/g)ANG(c/t)-3'. This consensus site is much longer than sites recognized by proteins containing a single AP2 repeat and neither AP2 repeat of ANT was alone capable of …
Does A Rigid Body Limit Maneuverability?, Jeffrey A. Walker Phd
Does A Rigid Body Limit Maneuverability?, Jeffrey A. Walker Phd
Faculty Publications
Whether a rigid body limits maneuverability depends on how maneuverability is defined. By the current definition, the minimum radius of the turn, a rigid-bodied, spotted boxfish Ostracion meleagris approaches maximum maneuverability, i.e. it can spin around with minimum turning radii near zero. The radius of the minimum space required to turn is an alternative measure of maneuverability. By this definition, O. meleagris is not very maneuverable. The observed space required by O. meleagris to turn is slightly greater than its theoretical minimum but much greater than that of highly flexible fish. Agility, the rate of turning, is related to maneuverability. …
Regulation Of Sup Expression Identifies Multiple Regulators Involved In Arabidopsis Floral Meristem Development, Hajime Sakai, Beth A. Krizek, Steven E. Jacobsen, Elliot M. Meyerowitz
Regulation Of Sup Expression Identifies Multiple Regulators Involved In Arabidopsis Floral Meristem Development, Hajime Sakai, Beth A. Krizek, Steven E. Jacobsen, Elliot M. Meyerowitz
Faculty Publications
During the course of flower development, floral homeotic genes are expressed in defined concentric regions of floral meristems called whorls. The SUPERMAN ( SUP, also called FLO10 ) gene, which encodes a C2H2-type zinc finger protein, is involved in maintenance of the stamen/carpel whorl boundary (the boundary between whorl 3 and whorl 4) in Arabidopsis. Here, we show that the regulation of SUP expression in floral meristems is complex, consisting of two distinct phases, initiation and maintenance. The floral meristem identity gene LEAFY ( LFY ) plays a role in the initiation phase through at least two pathways, which …
Aintegumenta Promotes Petal Identity And Acts As A Negative Regulator Of Agamous, Beth A. Krizek, Valerie Prost, Anthony Macias
Aintegumenta Promotes Petal Identity And Acts As A Negative Regulator Of Agamous, Beth A. Krizek, Valerie Prost, Anthony Macias
Faculty Publications
The Arabidopsis AINTEGUMENTA (ANT) gene has been shown previously to be involved in ovule development and in the initiation and growth of floral organs. Here, we show that ANT acts in additional processes during flower development, including repression of AGAMOUS (AG) in second whorl cells, promotion of petal epidermal cell identity, and gynoecium development. Analyses of ap2-1 ant-6 double mutants reveal that ANT acts redundantly with AP2 to repress AG in second whorl cells. The abaxial surface of ant petals contains features such as stomata and elongated, interdigitated cells that are not present on wild-type petals. …
An Est-Enriched Comparative Map Of Brassica Oleracea And Arabidopsis Thaliana, Tien-Hung Lan, Terrye A. Delmonte, Kim P. Reischmann, Joel Hyman, Stanley P. Kowalski, Jim Mcferson, Stephen Kresovich, Andrew H. Paterson
An Est-Enriched Comparative Map Of Brassica Oleracea And Arabidopsis Thaliana, Tien-Hung Lan, Terrye A. Delmonte, Kim P. Reischmann, Joel Hyman, Stanley P. Kowalski, Jim Mcferson, Stephen Kresovich, Andrew H. Paterson
Faculty Publications
A detailed comparative map of Brassica oleracea and Arabidopsis thaliana has been established based largely on mapping of Arabidopsis ESTs in two Arabidopsis and four Brassica populations. Based on conservative criteria for inferring synteny, “one to one correspondence” between Brassica and Arabidopsis chromosomes accounted for 57% of comparative loci. Based on 186 corresponding loci detected in B. oleracea and A. thaliana, at least 19 chromosome structural rearrangements differentiate B. oleracea and A. thaliana orthologs. Chromosomal duplication in the B. oleracea genome was strongly suggested by parallel arrangements of duplicated loci on different chromosomes, which accounted for 41% of loci …
Teaching The Ethics Of Biology, David Harris Phd, Carol K. Johansen
Teaching The Ethics Of Biology, David Harris Phd, Carol K. Johansen
Faculty Publications
Discusses the basic principles of ethics and ethical decision making as applied to biology. Ethical issues associated with biology; Theoretical basis of ethical decision-making; Models of ethical decision-making; Social implications of scientific experimentation and discovery.
Responses Of Phytoplankton And Pfiesteria-Like Dinoflagellate Zoospores To Nutrient Enrichment In The Neuse River Estuary, North Carolina, Usa, James L. Pinckney, Hans W. Paerl, Elin Haugen, Patricia A. Tester
Responses Of Phytoplankton And Pfiesteria-Like Dinoflagellate Zoospores To Nutrient Enrichment In The Neuse River Estuary, North Carolina, Usa, James L. Pinckney, Hans W. Paerl, Elin Haugen, Patricia A. Tester
Faculty Publications
The recently described toxic dinoflagellate Pfiestena piscicida and morphologically similar Pfiesteria-like dinoflagellates have become a major water quality issue with possible fish mortality and reported human health implications. The linkages between accelerated nutrient loading, eutrophication, and the proliferation of this group of dinoflagellates, however, are not well established for natural Systems. Phytoplankton pnmary production may provide a key link between nutrient inputs and potential outbreaks of Pfiesteria-like biflagellated zoospores in the Neuse River Estuary, North Carolina. The impacts of nutrient (NO3- -nitrogen and PO43- -phosphorus) supply rates, sediment-water column exchange, water column mixing, and phytoplankton prey …
A Scanning Electron Microscopic Study Of The Infection Of Water Oak (Quercus Nigra) By Taphrina Caerulescens, Josephine Taylor, Dale O. Birdwell
A Scanning Electron Microscopic Study Of The Infection Of Water Oak (Quercus Nigra) By Taphrina Caerulescens, Josephine Taylor, Dale O. Birdwell
Faculty Publications
The fungal pathogen Taphrina caerulescens was isolated from leaves of water oak (Quercus nigra) exhibiting symptoms of oak leaf blister. Healthy leaves were inoculated with a suspension of cells from pure culture in order to examine the infection process. Scanning electron microscopy was used to monitor budding of T. caerulescens cells, formation of germ tubes, and indirect penetration of leaf tissue through stomata, which occurred within 48 h post-inoculation. Direct penetration was not observed.
Home Ranges Of Rat Snakes (Colubridae: Elaphe) In Different Habitats, Stephen J. Mullin, William H. N. Gutzke, Gary D. Zenitsky, Robert J. Cooper
Home Ranges Of Rat Snakes (Colubridae: Elaphe) In Different Habitats, Stephen J. Mullin, William H. N. Gutzke, Gary D. Zenitsky, Robert J. Cooper
Faculty Publications
Based on our findings, we suggest that rat snakes represent not only a major predator of kites, but also of other canopy and mid-story nesting species in the southeastern United States. For example, rat snakes are the most dominant snake nest predator of bird nests throughout the Southeast (DeGregorio et al. 2014) and are skilled tree climbers that often occupy arboreal habitats (Jackson 1976, Keller and Heske 2000, Sperry et al. 2009), particularly in bottomland forests (Mullin et al. 2000, Carfagno and Weatherhead 2009). Thus, the role of rat snakes as predators of nests above the understory is likely underappreciated …
Diet Of Gambelia Wislizenii From Chihuahua, Mexico, J. A. Lemos-Espinal, Geoffrey R. Smith, H. M. Smith, R. E. Ballinger
Diet Of Gambelia Wislizenii From Chihuahua, Mexico, J. A. Lemos-Espinal, Geoffrey R. Smith, H. M. Smith, R. E. Ballinger
Faculty Publications
No abstract provided.
Threatened Fishes Of The World: Chasmistes Liorus Jordan, 1878 (Catostomidae), Mike Whitney, Mark C. Belk
Threatened Fishes Of The World: Chasmistes Liorus Jordan, 1878 (Catostomidae), Mike Whitney, Mark C. Belk
Faculty Publications
Common name: June sucker.
Effects Of Age And Group Size On Habitat Selection And Activity Level In Xenopus Laevis Tadpoles, D. R. Golden, Geoffrey R. Smith, Jessica E. Rettig
Effects Of Age And Group Size On Habitat Selection And Activity Level In Xenopus Laevis Tadpoles, D. R. Golden, Geoffrey R. Smith, Jessica E. Rettig
Faculty Publications
No abstract provided.