Mercury Concentrations in Double-Crested Cormorant Chicks Across Canada
نویسندگان
چکیده
منابع مشابه
Isotopic Discrimination in the Double-Crested Cormorant (Phalacrocorax auritus)
The diet-tissue discrimination factor is the amount by which a consumer's tissue varies isotopically from its diet, and is therefore a key element in models that use stable isotopes to estimate diet composition. In this study we measured discrimination factors in blood (whole blood, red blood cells and plasma), liver, muscle and feathers of Double-crested Cormorants (Phalacrocorax auritus) for ...
متن کاملMercury in parasitic nematodes and trematodes and their double-crested cormorant hosts: bioaccumulation in the face of sequestration by nematodes.
Endoparasites can alter their host's heavy metal concentrations by sequestering metals in their own tissues. Contracaecum spp. (a nematode), but not Drepanocephalus spathans (a trematode), were bioaccumulating mercury to concentrations 1.5 times above cormorant hosts. Nematodes did not have significantly greater stable nitrogen isotope values (δ(15)N) than their hosts, which is contradictory to...
متن کاملBacterial flora of free-living double-crested cormorant (Phalacrocorax auritus) chicks on Prince Edward Island, Canada, with reference to enteric bacteria and antibiotic resistance.
Cloacal and pharyngeal swabs from 100 tree-nesting Double-crested cormorant (DCC) chicks were examined by culture for commensal and potentially pathogenic bacteria. No Salmonella or Erysipelothrix were isolated from the cloacal swabs. Twenty-two cloacal swabs were positive for Campylobacter, of which 14 were C. jejuni, C. coli, and 1 C. lari. None belonged to common serotypes isolated from huma...
متن کاملDouble-crested Cormorant Movements in Relation to Aquaculture in Eastern Mississippi and Western Alabama
—Concomitant with increasing numbers of the Double-crested Cormorant ( Phalacrocorax auritus ), catfish producers in eastern Mississippi and western Alabama have reported damage caused by cormorant predation. VHF telemetry was used to document movements of 25 cormorants from all known night roosts in the aquaculture producing areas of eastern Mississippi and western Alabama, January-April 1998....
متن کاملDouble-Crested Cormorant Distribution on Catfish Aquaculture in the Yazoo River Basin of Mississippi
Estimating the catfish aquaculture production losses that can be attributed to double-crested cormorants (Phalacrocorax auritus) has proved problematic because knowledge of the distribution of cormorants on catfish aquaculture is lacking. We evaluated use versus availability of various production pond types and landscape-scale factors affecting the distribution of cormorants on channel catfish ...
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ژورنال
عنوان ژورنال: Archives of Environmental Contamination and Toxicology
سال: 2018
ISSN: 0090-4341,1432-0703
DOI: 10.1007/s00244-018-0533-y