Download factors determining eggs` quality in different fish species (a review)

UDC 639.2/3.034
Factors Determining Eggs’ Quality in Different Fish Species (a Review) / N.
Yu. Yevtushenko, A. G. Sherelo // Gidrobiol. Zhurn. – 2016. – Vol. 52, N 1. – P.
78–91.
On the basis of the literature data information is generalized on indexes of eggs’
quality in different fish species. Analysis of literature showed that the eggs’ quality
directly and indirectly depends on individual features of breeders (physiological
state, age, fatness, number of spawning), and on food quality, fattening and
spawning conditions and other factors. Investigation of these regularities is needed
for development of theoretical aspects of fish development biology, for
establishment of reasons of their populations’ density fluctuations in natural water
bodies, causes of different viability and fertility of breeders, and for search of
means of increase of the reproductive products quality and obtaining of viable
juveniles. The effect of the food quality, age of breeders, chemical composition of
their body and metabolic processes in the female organisms, fattening conditions
and breeders’ keeping, and well as environmental factors on the eggs’ quality was
considered. Fertility and regularities of forming of the reproductive products in
different fish species are formed as adaptation to environmental conditions and
changes under impact of these conditions.
KEYWORDS: fishes, fattening conditions, breeders’, breeders’ keeping, food
quality, age, chemical composition of a body, environmental factors.
69 references.