NEW DATA ON BREEDING AND EARLY ONTOGENESIS OF THREE-SPINED STICKLEBACK (Gasterosteus aculeatus L.)
Keywords:
Gasterosteus aculeatus, EGGS, PERIVITELLINE SPACE, GERMINAL DISK, OIL
Abstract
Studies were carried out on the content of stickleback (Gasterosteus aculeatus L.) nests, spatial (in vertical and horizontal light beam) distribution of developing embryo, size and shape of perivitelline space.
Number of eggs in one nest was up to 1810, laid by several females for several days.
Germinal disk, thus also the embryo, was always placed laterally in the equatorial zone. Oil drops, which cause superior position of the germinal disk in other freshwater fishes, do not play such a role in the stickleback because they are not integrated with the disk.
