| description of a new species of maritrema (digenea:microphallidae) from mar chiquita coastal lagoon (buenos aires, argentina) with notes on its life cycle. | adults of maritrema bonaerensis n. sp. (digenea:microphallidae) were collected from the intestine of the gulls larus maculipennis and larus atlanticus from mar chiquita coastal lagoon, buenos aires province, argentina. the new species differs from m. pulcherrima travassos, 1928 in having smaller sucker ratio, longer intestinal ceca, ovary not lobed, and larger eggs, and from maritrema prosthometra deblock and heard, 1969 it differs in having larger suckers, smaller vitelline follicles, and in th ... | 1997 | 9267416 |
| a survey for avian influenza from gulls on the coasts of the district of pinamar and the lagoon salada grande, general madariaga, argentina. | in the present study, fecal samples obtained from kelp gulls (larus dominicanus), brown-hooded gulls (larus maculipennis), and olrog's gulls (larus atlanticus) on the coast of the district of pinamar, and grey-hooded gulls (larus cirrocephalus) on the coast of the lagoon salada grande and surrounding wetlands, general madariaga, buenos aires province, argentina, were tested for evidence of avian influenza virus over a period of 3 yr. this surveillance in free-living wild birds in the buenos aire ... | 2012 | 23402129 |
| intestinal acanthocephaladiosis in olrog's gulls (larus atlanticus): profilicollis chasmagnathi as possible cause of death. | in 2003 and 2005, mortality events were observed among hatch-year olrog's gulls (larus atlanticus) in a breeding colony in the bahía blanca estuary, argentina. freshly dead chicks were collected for parasitologic and parasite-associated pathologic studies. profilicollis chasmagnathi was found at various intensities in all of the birds examined (n=28). on gross and histopathologic examinations, severe lesions ranging from intestinal obstruction to complete perforation were present in small and la ... | 2007 | 17495312 |
| enteric infections by trematodes and nematodes in olrog's gull, larus atlanticus. | trematodes and nematodes can be pathogenic helminths of birds. every year during the breeding season, there is variable mortality among chicks from the largest olrog's gull (larus atlanticus) colony in argentina. during two consecutive breeding seasons of olrog's gull, we studied epidemiological and pathological aspects of infections by digeneans (microphallidae) and nematodes (acuariidae) in olrog's gull chicks. prevalence of nematode infection was 80.3% in 2005 and 89.2% in 2006, and mean inte ... | 2012 | 23397854 |
| mercury levels and health parameters in the threatened olrog's gull (larus atlanticus) from argentina. | mercury (hg) exposure was investigated through feathers of olrog's gull and related to health parameters in adults (hematocrit, total plasma proteins, morphometric measures, sex) and chicks (hematocrit, total plasma proteins, immunoglobulins g and m) from a colony located in estuary of bahía blanca, argentina. mercury concentrations were 5.50 ± 2.59 μg g⁻¹ (n = 44) in live adults, 1.85 ± 0.45 μg g⁻¹ (n = 45) in live chicks and 1.81 ± 0.41 μg g⁻¹ (n = 41) in dead chicks. large differences were ob ... | 2011 | 21181261 |
| pathology of enteric infections induced by the acanthocephalan profilicollis chasmagnathi in olrog's gull, larus atlanticus, from argentina. | acanthocephalans can be pathogenic helminths of marine birds. every year during the breeding season, there is variable mortality among prefledged chicks from the largest known olrog's gull (larus atlanticus) colony. mortality has been associated with infection by the acanthocephalan profilicollis chasmagnathi. our aim was to study the role of chicks' size as a risk factor for intensity of infection and severe pathology, and to expand upon previous pathological findings reported in acanthocephala ... | 2013 | 22176660 |
| persistent organic pollutants in sediments, intertidal crabs, and the threatened olrog's gull in a northern patagonia salt marsh, argentina. | persistent organic pollutants (pops) are of great concern for the environment. in this study we (a) determine levels and distribution of ocps, pcbs, and pbdes in sediments and two crab species (neohelice granulata and cyrtograpsus altimanus), (b) assess bioaccumulation in crabs, and (c) explore the occurrence of pops in the near threatened olrog's gull (larus atlanticus) chicks and eggs in one of the most important salt marsh environments in the south west atlantic. sediments, crabs, and gull ch ... | 2018 | 30509839 |
| chlorpyrifos and persistent organic pollutants in feathers of the near threatened olrog's gull in southeastern buenos aires province, argentina. | the use of bird feathers to assess environmental contamination has steadily increased in ecotoxicological monitoring programs over the past decade. the olrog's gull (larus atlanticus) is a species endemic to the atlantic coast of southern south america, constituting one of the three threatened gull species listed in the entire american continent. the aim of this study was to assess the exposure to persistent organic pollutants (pops) and chlorpyrifos in the near threatened olrog's gull through t ... | 2020 | 33143978 |
| serum biochemistry values for the olrog's gull (larus atlanticus): a study based on free-living individuals. | analysis of serum parameters provides information about body condition, nutritional state, and health status of individuals/species, and has broad application in ecological research and veterinary diagnosis. this study establishes baseline values for serum chemistries of the olrog's gull (larus atlanticus). glucose, urea, uric acid, total protein, globulin, albumin, cholesterol, triglyceride, calcium, and phosphorus concentrations were determined, as was the activity of the following enzymes: al ... | 2019 | 31260197 |