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Articles 1 - 13 of 13
Full-Text Articles in Life Sciences
Materials Collected By The Southern Branch Of The Uc Africa Expedition With A Report On Previously Unpublished Plio-Pleistocene Fossil Localities, Tesla A. Monson, Marianne F. Brasil, Leslea J. Hlusko
Materials Collected By The Southern Branch Of The Uc Africa Expedition With A Report On Previously Unpublished Plio-Pleistocene Fossil Localities, Tesla A. Monson, Marianne F. Brasil, Leslea J. Hlusko
Anthropology Faculty and Staff Publications
From 1947 to 1948, paleontologists from the University of California Museum of Paleontology (UCMP), Charles Camp and Frank Peabody, led the southern branch of the University of California’s Africa Expedition. While in South Africa, Camp and Peabody collected thousands of specimens excavated from more than 70 sites, 40 of which make up the Plio-Pleistocene South African assemblage at the UCMP. Materials collected by researchers accompanying the expedition are held at numerous repositories on the University of California Berkeley campus including the UCMP, the Museum of Vertebrate Zoology (MVZ), the Phoebe A. Hearst Museum of Anthropology and the University of California’s …
Hybridization And The Spread Of The Apple Maggot Fly, Rhagoletis Pomonella (Diptera: Tephritidae), In The Northwestern United States, Tracy Arcella, Glen R. Hood, Thomas H.Q. Powell, Sheina B. Sim, Wee L. Yee, Dietmar Schwarz, Scott P. Egan, Robert B. Goughnour, James J. Smith, Jeffery L. Feder
Hybridization And The Spread Of The Apple Maggot Fly, Rhagoletis Pomonella (Diptera: Tephritidae), In The Northwestern United States, Tracy Arcella, Glen R. Hood, Thomas H.Q. Powell, Sheina B. Sim, Wee L. Yee, Dietmar Schwarz, Scott P. Egan, Robert B. Goughnour, James J. Smith, Jeffery L. Feder
Biology Faculty and Staff Publications
Hybridization may be an important process interjecting variation into insect populations enabling host plant shifts and the origin of new economic pests. Here, we examine whether hybridization between the native snowberry-infesting fruit fly Rhagoletis zephyria (Snow) and the introduced quarantine pest R. pomonella (Walsh) is occurring and may aid the spread of the latter into more arid commercial apple-growing regions of central Washington state, USA. Results for 19 microsatellites implied hybridization occurring at a rate of 1.44% per generation between the species. However, there was no evidence for increased hybridization in central Washington. Allele frequencies for seven microsatellites in R. …
Importance Of Ubiquitin-Mediated Degradation On Diacetyl Chemosensation In C. Elegans, Ellen Zocher, Nelson Ruth
Importance Of Ubiquitin-Mediated Degradation On Diacetyl Chemosensation In C. Elegans, Ellen Zocher, Nelson Ruth
Scholars Week
Ubiquitin is a small regulatory protein that can be attached to other proteins in a cell, tagging them for destruction. Ubiquitin plays a critical role in regulating the abundance and activity of many proteins. We examined the role of ubiquitin and the cellular pathway it follows in olfactory neurons in the model organism C. elegans. C. elegans senses and moves towards sources of diacetyl, a volatile compound generated by the bacteria it consumes. This behavior is dependent on the diacetyl receptor, ODR-10. We hypothesized that the ubiquitin-mediated degradation system is involved in the regulation of this sensory receptor. Using transgenic …
Can Collection Specimen Data Reveal Temporal Shifts Due To Climate Change?, Julie Maurer
Can Collection Specimen Data Reveal Temporal Shifts Due To Climate Change?, Julie Maurer
Scholars Week
Climate change is altering the distribution, behavior, and migration patterns of many species. Typically, these responses are documented studies in which standardized methods are used to collect population or behavioral data over several years. Multi-decade studies are rare and few predate the recent dramatic increase in global temperatures, limiting our ability to understand long-term consequences of climate change. Natural history (NH) collections offer a potential solution; they hold a wealth of species occurrence documentation spanning from decades to centuries. However, because the sampling of natural history collectors is spatially and temporally haphazard, it remains unclear whether NH data is useful …
Organic Content And Silt To Sand Ratio In Correlation With Porewater Sulfide Concentrations Found In Eel Grass (Zostera Marina) Beds, Clarissa Felling
Organic Content And Silt To Sand Ratio In Correlation With Porewater Sulfide Concentrations Found In Eel Grass (Zostera Marina) Beds, Clarissa Felling
Scholars Week
Eel grass, Zostera marina, beds are a vital habitat for both economically valuable species and nutrient cycling. Populations of Z. marina in Washington State have either stayed consistent or dwindled slightly. To increase the distribution of eel grass in Washington State knowing the organic content and silt to sand ratio is important for these plants survival. If this data correlates to sulfide concentrations, which can inhibit the abundance of eelgrass, department officials can locate viable places for new beds. Sediment samples were taken from four different eelgrass sites around Skagit County. Each sample was divided in two; one heated at …
The Effect Of Ribosomal Protein Inhibition On Lifespan In Drosophila Melanogaster, Ella Lamont
The Effect Of Ribosomal Protein Inhibition On Lifespan In Drosophila Melanogaster, Ella Lamont
WWU Honors College Senior Projects
No abstract provided.
"What Is Love?" The Sounds Of Love From William S. Burroughs, Kathryn Cronin
"What Is Love?" The Sounds Of Love From William S. Burroughs, Kathryn Cronin
Occam's Razor
William Burroughs, his life and works, have a set beginning and end, but the biological and spiritual connections he draws between language, sound, and the human body appear to have undefined points of origin. Sound has always been. Language has always been. To exist outside of language and sound is to exist outside of time and space and thus outside the body. Burroughs’ theories on language, the word, and their connection to the body are woven through texts filled with structural and narrative convolutions. Nova Trilogy, especially The Ticket that Exploded, as well as the early novel …
Occam's Razor Vol. 5 - Full (2015)
Non-Invasive Genetic Tracking Of Harbor Seals (Phoca Vitulina), Andrew P. (Andrew Peter) Rothstein
Non-Invasive Genetic Tracking Of Harbor Seals (Phoca Vitulina), Andrew P. (Andrew Peter) Rothstein
WWU Graduate School Collection
Understanding the effect of individual differences on trophic interactions of upper-level predators, which can have disproportionate effects on an ecosystem, is imperative for successful management of populations. Marine mammals that prey on fish species of commercial and conservation importance are thus of particular interest. However, quantitatively monitoring and evaluating the impact of marine mammals on the environment is challenging because it is difficult to observe, capture, and collect repeated samples of individuals. Molecular genetic analysis of scat provides an inexpensive and feasible option to address these challenges. I developed an innovative non-invasive method for re-sampling individual marine mammals by collecting …
The Effect Of Maternal Traits On Rearing Success In Pacific Harbor Seals (Phoca Vitulina Richardsii), Erin Rose D'Agnese
The Effect Of Maternal Traits On Rearing Success In Pacific Harbor Seals (Phoca Vitulina Richardsii), Erin Rose D'Agnese
WWU Graduate School Collection
Reproductive success in species that care for their young is affected by the rearing strategy utilized. Otariids are known as income breeders, because they continue to forage during a rearing time of about a year while leaving pups on land; their rearing success is related to attendance patterns. On the other end of the continuum, large phocids are described as capital breeders, fasting on shore during a rearing time from 4 to 50 days. Their rearing success is based on maternal body mass. Harbor seals (Phoca vitulina) don’t appear to follow either of these two strategies fully and …
Physiological And Behavioral Responses To Changes In Salinity In The Invasive Bivalve Nuttallia Obscurata Compared To The Native Bivalve Leukoma Staminea, Tori B. Talkington
Physiological And Behavioral Responses To Changes In Salinity In The Invasive Bivalve Nuttallia Obscurata Compared To The Native Bivalve Leukoma Staminea, Tori B. Talkington
WWU Graduate School Collection
Nuttallia obscurata is a euryhaline invasive clam with populations that are rapidly spreading along the northeast Pacific coast. It inhabits areas of changing salinity such as the high intertidal and areas of freshwater seepages, areas uninhabited by local clam species. N. obscurata’s euryhalinity, salinity tolerance, and ability to survive in uniquely stressful areas likely facilitated its settlement and rapid spread into these distinctive microclimates. Previous research on N. obscurata is minimal, however favorable physiological and behavioral responses likely allow N. obscurata to live in these environments. The physiological response of osmolyte production and the behavioral responses of filtration rate …
Trajectories Of Functional And Species Change During Plant Community Assembly In A California Serpentine Grassland, Melissa N. Habenicht
Trajectories Of Functional And Species Change During Plant Community Assembly In A California Serpentine Grassland, Melissa N. Habenicht
WWU Graduate School Collection
Elucidating the mechanisms that underlie species coexistence and community assembly is central for understanding basic ecological patterns of species’ abundances, how global change may alter those patterns, and how to effectively manage ecosystems. Niche and neutral theory represent two opposite sides on a continuum of potential drivers of community composition and coexistence. Niche theory poses that species’ differences facilitate coexistence by causing intraspecific competition to be stronger than interspecific competition. In contrast, neutral theory assumes that species are similar in fitness and their effects on one another, and that stochastic variation in births, deaths, immigration, and extinction allow coexistence. Rather …
The Vocal Breeding Behaviour Of Harbour Seals (Phoca Vitulina) In Georgia Strait, Canada: Temporal Patterns And Vocal Repertoire, Katrina A. (Katrina Anne) Nikolich
The Vocal Breeding Behaviour Of Harbour Seals (Phoca Vitulina) In Georgia Strait, Canada: Temporal Patterns And Vocal Repertoire, Katrina A. (Katrina Anne) Nikolich
WWU Graduate School Collection
During the breeding season, male harbour seals (Phoca vitulina) produce underwater calls used in intra-sexual competition and advertisement. One call type, called a roar, has been documented in every population of this species that has been studied. Because calls vary in structure and temporal patterns among populations, it can be inferred that regional vocal dialects may exist, and that the influence of local environmental and biological conditions may affect the timing of calls. Breeding calls have only been studied in relatively few locations worldwide; however, the effect of ambient noise on the underwater vocal behaviour of harbour seals …