Filters: Tags: migration (organisms) (X) > partyWithName: Craig A Stricker (X)

Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Craig A Stricker Southwest Region Fort Collins Science Center Ecosystems U.S. Geological Survey - ScienceBase U.S. Geological Survey U.S. Geological Survey - ScienceBase Categories Data (2) Tag Types Theme (2) Place (2) Harvest Set (2) Tag Schemes Common geographic areas (2) ISO 19115 Topic Category (2) USGS Thesaurus (2) Marine Realms Information Bank (MRIB) keywords (1) View Results as: JSON ATOM CSV

Hydrogen stable isotope data for: 'Mechanisms associated with an advance in the timing of seasonal reproduction in an urban songbird'. This dataset includes stable hydrogen isotope values of the nonexchangeable hydrogen contained in the outer most secondary feathers of dark-eyed juncos (Junco hyemalis thurberi) collected from the University of California San Diego campus in La Jolla, California in 2014. Hydrogen isotope values in feathers have become a powerful tool for inferring the breeding grounds of a wide variety of avian species. In most of these migratory species, feathers are molted prior to departing the breeding grounds for more overwintering regions to the south. These data were used in tandem with morphological and genetic data for the classification of resident and migrant birds. There are two files in this dataset: 1) A tab delimitated... Categories: Data; Tags: California, La Jolla, USGS Science Data Catalog (SDC), United States, biota, All tags... isotope geochemistry, migration (organisms), Fewer tags Ovary mass and stable hydrogen isotope data for resident and migratory female dark-eyed juncos This dataset includes ovary mass and stable hydrogen isotope compositions of feathers and claws from resident and migratory female dark-eyed juncos (Junco hyemalis) collected during early spring at Mountain Lake Biological Station, Pembroke, Virginia. A total of 18 migrant and 15 resident female dark-eyed juncos, a songbird that exhibits seasonal sympatry, were caught during March-April. Stable hydrogen isotopes were used to infer relative breeding and wintering latitude of migrants. Ovary mass served as a proxy for reproductive development. These data were used to explore whether seasonal sympatry fosters or inhibits genetic divergence between migrants and residents and to the extent that this depends on their... Categories: Data; Tags: USGS Science Data Catalog (SDC), Virginia, biota, migration (organisms)