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Long-term selection for body weight, which affecting changes in life span and time of puberty, has resulted different reproductive strategy in mice divergently selected for body weight at the 21st day of age. Heavy mice (C) are typically rapidly maturing animals, with a shorter but more intense reproductive period. Light mice (L) are more long-lived so that mature later than C mice, Due to the longer...
In this paper are presented the results of measurements determiny tin concentrations in the muscles, livers, kidneys and lungs taken from 15 cows from the voivodeship of Białystok, where small levels of environmental pollution with heavy metals were recorded and from 15 cows of the Katowice region, where significant environmental pollution with these metals were noted. The averages of these concentrations...
W żywieniu tuczników porównywano efektywność stosowania 3 mieszanek pełnoporcjowych z udziałem różnych komponentów rzepakowych. Badane diety nie zawierały komponentów pochodzenia zwierzęcego. Tucz eksperymentalny przeprowadzono w chlewni doświadczalnej. Doświadczeniem objęto łącznie 36 warchlaków mieszańcowych (polska biała zwisłoucha x wielka biała polska). Utworzono 3 grupy doświadczalne, po 12...
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