The influence of low concentrations of ions of zinc on the average daily ration of lymnaeidae (Mollusca: Pulmonata: Lymnaeidae)
Ivan Franko State University of Zhytomyr
40, V. Berdychivska St., Zhytomyr 10008, Ukraine
Here is researched an influence of concentrations of ions of zinc is set from maximum concentrations limits are from 0,5–1 on the size of average daily ration 10 types of shellfishes of sort of Lymnaea for a consumption by them leaves of Alisma. It is discovered that low concentrations of ions of Zn2+ are in all, without an exception, investigational shellfishes marked an stimulate activity of vital functions. To it the growth registered by us testifies in relation to the norm of values of size of average daily ration for the consumption of Lymnaeidae leaves of Alisma.
Keywords: Lymnaea, the zinc ions, the average daily ration