| argas (argas) monolakensis, new species (acari: ixodoidea: argasidae), a parasite of california gulls on islands in mono lake, california: description, biology, and life cycle. | argas (argas) monolakensis, n. sp., is described from adults, nymphs, and larvae collected from under and around nests of california gulls, larus californicus lawrence, on islands in mono lake, mono county, calif., and from specimens reared in the laboratory. this species is closely related to a. cooleyi kohls & hoogstraal, a parasite of cliff swallows, hirundo pyrrhonota vieillot, but is easily distinguished by hypostome dentition and roof of haller's organ in all stages and chaetotaxy of the l ... | 1992 | 1552533 |
| probable epizootic chlamydiosis in wild california (larus californicus) and ring-billed (larus delawarensis) gulls in north dakota. | during the summer of 1986, more than 400 california gulls (larus californicus) and ring-billed gulls (larvus delawarensis), primarily fledglings, died on an island in lake sakakawea near new town, north dakota (usa). mortality was attributed largely to chlamydiosis. necropsy findings in nine carcasses included splenomegaly (n = 9), hepatomegaly (n = 4), and pericarditis (n = 1). livers from three california gulls and two ring-billed gulls, and spleens from the same five birds plus a third ring-b ... | 1995 | 8592370 |
| selenium and mercury concentrations in california gulls breeding on the great salt lake, utah, usa. | we examined selenium (se) and mercury (hg) concentrations in adult california gulls (larus californicus) nesting on the great salt lake, utah, usa, during 2006 and 2007. during 2006, the mean se concentration (+/- standard error) was 18.1 +/- 1.5 microg/g in blood on a dry-weight basis and 8.1 +/- 0.4 microg/g in liver. during 2007, se concentrations were 15.7 +/- 1.5 microg/g in blood and 8.3 +/- 0.4 microg/g in liver; hg concentrations were 2.4 +/- 0.3 microg/g in blood and 4.1 +/- 0.5 microg/ ... | 2009 | 18767915 |
| some internal parasites of the california gull larus californicus lawrence, in wyoming. | | 1973 | 4699872 |
| cestodes of california gulls. | | 1950 | 15402949 |
| mono lake virus infecting argas ticks (acari: argasidae) associated with california gulls breeding on islands in mono lake, california. | | 1988 | 2848128 |
| california gull chicks raised near colony edges have elevated stress levels. | coloniality in nesting birds represents an important life history strategy for maximizing reproductive success. birds nesting near the edge of colonies tend to have lower reproductive success than individuals nesting near colony centers, and offspring of edge-nesting parents may be impaired relative to those of central-nesting parents. we used fecal corticosterone metabolites in california gull chicks (larus californicus) to examine whether colony size or location within the colony influenced a ... | 2011 | 21596043 |
| unintended consequences of management actions in salt pond restoration: cascading effects in trophic interactions. | salt evaporation ponds have played an important role as habitat for migratory waterbirds across the world, however, efforts to restore and manage these habitats to maximize their conservation value has proven to be challenging. for example, salinity reduction has been a goal for restoring and managing former salt evaporation ponds to support waterbirds in the south bay salt pond restoration project in san francisco bay, california, usa. here, we describe a case study of unexpected consequences o ... | 2015 | 26030415 |