Features of heavy metals accumulation in the geese of different ages
The geese breeding is traditional althrough not very popular in Ukrainian country. It produce valuable fluff, feathers, fat and meat, but is demanding to breeding conditions including the state of environment. It is known that the pollution of the environment esspecially with heavy metals can affect growth and cultivation of waterfowl poultry. The numerous papers consider heavy metal content namely lead and cadmium in the wild geese in many regions of the world as marker of pollution, but few of them consider metal contained in domestic geese that are popular poultry in China, France and other country. This paper is intended to fill the gap in the view of perspectives of geese breeding in Lviv region. The determination of the content of lead and cadmium in the period of five weeks was carried out in juvenile geese aged 5–10 weeks and adult geese 60–65 weeks old, grown in a farm poultry enterprise in Lviv region. With the aid of atomic adsorption spectrophotometry, the weekly dynamics of the content of metal ions in the feathers, as well as the content of cadmium and lead in the muscle tissue and the liver in the beginning and at the end of the observation period were studied. The expressed age features of the metal content in poultry tissues and the slight increase in the content of both metals in the feathers during the experiment were revealed. The growth 3–123% of the content of heavy metals with the age is established. The growth of cadmium content is more pronounced being from 52% to 62% in liver and 114% to 123% up in muscle in the adult geese comparing with the juvenile ones. The amount of metal ions in the liver is about twice as high as in the muscles in all age group. The content of metals in the feathers is characterized by a significant spread within each observation group and accordingly the known data is heavy influenced by molting. In general, a high correlation between the content of lead and cadmium with the age during the first two years was established for geese of gray obroshyn breed.
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