EFFECT OF WATER ON THE FISH OVUM OF DIFFERENT ECOLOGICAL GROUPS
Journal Title: Вестник Астраханского государственного технического университета. Серия: Рыбное хозяйство - Year 2013, Vol 0, Issue 3
Abstract
The researches of the authors about the structure of female sexual products of the fishes belonging to different ecological groups (lithophile, phytophile, and pelagophile) are generalized. The analysis of influence of water on ova of fishes and also its role in their vital activity is given. It is established that an ovum of fishes of different ecological groups significantly differ among themselves in the external structure. However, their internal structure is in many respects similar. So all three types of eggs have fatty vacuoles on the periphery and there are ovular vacuoles in the center. It is shown that during the contact with water impregnated ova start changing the structure. Externally these changes are shown differently in different types of fishes: some eggs (beluga, carp) have glutinosity, and others become swelled and increased in size in several times (silver carp). Occurring internal reorganizations of organoids and further crushing in all cases are similar. Thus, it is possible to take for granted that water at contact with ova of the studied species of fish is a source of activation of internal reorganizations, as a result of which fatty vacuoles are displaced to a micropyle, and ovular vacuoles, merging, are integrated.
Authors and Affiliations
Tikhomirov Mikhailovich , Firsova Valerievna
Keywords
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