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544859 
Journal Article 
Zawartosc olowiu w tkankach i piorach smieszek Larus ridibundus gniazdujacych na Zbiorniku Mietkowskim. [Lead contents in tissues and feathers of the black-headed gulls Larus ridibundus breeding on the Mietkowski Reservoir.] 
Orlowski, G; Polechonski, R; Dobicki, W; Zawada, Z 
2005 
46 
4 
231-240 
An analysis of lead (Pb) content in six types of tissue (pectoral muscle, liver, kidneys, lungs, femur, cerebrum) and feathers of the Black-headed Gull Larus ridibundus breeding on the Mietkowski Reservoir (an area of 980 ha, Lower Silesia), based on samples taken from 14 individuals (9 adults and 5 fledglings), showed the highest concentrations of this metal in the brain tissue of fledglings having the smallest body mass (83.00 and 55.20 pg g' Pb dry weight). The ratio of minimum to maximum lead concentrations in brain tissue was 1:6.82 in fledglings and 1:1.42 in adults. In general, of all analyzed tissues, statistically significant differences in mean lead concentrations ([plus or minus] SD) between fledglings and adult birds (P=0.03) were noted only for bones (fledglings:17.61 [plus or minus] 6.35 vs. adults: 56.06 [plus or minus] 31.48 pg g' dry weight). The hones of adult birds were characterized by very high diversification of the lead content (extreme values: 28.60 and 121.88 pg g' dry weight). In fledglings, increased contents of the metal were found in lungs (fledglings: 13.14 [plus or minus] 2.40 vs. adults: 11.24 [plus or minus] 1.04 pg g' dry weight) and feathers (fledglings: 10.40 [plus or minus] 5.36 vs. adults: 8.22 [plus or minus] 2.43 pg g' dry weight). The level of lead contamination of Black-headed Gulls from the Mietkowski Reservoir was decidedly lower when compared with the population inhabiting the strongly industrialized region of Upper Silesia (Copyright applies to all Abstracts.) 
AGING; BIOCHEMISTRY; BIOGEOGRAPHY; BIOMETRY; BODY size; BUSINESS enterprises; ENVIRONMENTAL aspects; FEATHERS; HABITAT (Ecology) -- Modification; HEAVY metals; INDUSTRIALIZATION; HIDES & skins; LEAD; LIVER; MORPHOLOGY; PALEARCTIC; PESTICIDES; POLLUTION; SKIN; TOXICOLOGY; HUMAN-animal relationships; CHARADRIIFORMES; LARIDAE; BLACK-headed gull; EURASIA; EUROPE; POLAND; Alteraciones del hábitat; Aves; Biométricos; Bioquímica; Cerebro; Crianza; Determinación de edad; Disturbios; Empresas comerciales; Factores ambientales; Guacharros; Hígado; Industrialización; Metales pesados; Morfología; Pajaritos; Pesticidas/contaminación; Piel; Plomo; Plumaje; Plumas; Procreando; Pulmones; Relaciones fauna/humano; Riñones; Tamaño del cuerpo; Disturbances; Internal organs; Land zones; Lead accumulation; Lead content; Lead pollution; Mietkowski Reservoir; Pesticides/pollution