Filters: Tags: Forster's tern (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Contacts Sarah H Peterson Western Ecological Research Center U.S. Geological Survey Josh T Ackerman U.S. Geological Survey - ScienceBase More... Categories Data (1) Tag Types Theme (1) USGS Scientific Topic Keyword (1) Harvest Set (1) Tag Schemes None (1) ISO 19115 Topic Category (1) USGS Thesaurus (1) View Results as: JSON ATOM CSV

Egg Membrane Thickness in 13 Waterbird Species Eggshells of 13 waterbird species were divided in half longitudinally and the outer eggshell membrane was removed from one of the halves. Eggshell thickness was measured for both eggshell halves, both with and without the outer eggshell membrane. The eggshell membrane thickness was calculated by taking the difference between the two thickness measurements. Categories: Data; Tags: American avocet, American coot, Black skimmer, Black-necked stilt, California gull, All tags... Caspian tern, Double-crested cormorant, Ecology, Forster's tern, Green heron, Killdeer, Pied-billed grebe, Snowy plover, USGS Science Data Catalog (SDC), Western grebe, Wildlife Biology, biota, egg, egg masses, morphology (biological), Fewer tags