MORPHO-FUNCTIONAL CHARACTERISTICS OF GAMETES AND PRODUCING POSSIBILITIES OF MARINE ORGANISMS FOR THEIR REPRODUCTION IN MONO- AND POLYCULTURE

Abstract

Reproduction of the sea urchins Strongylocentrotus intermedius, Mesocentrotus nudus, and the scallop Mizuhopecten yessoensis is considered in natural communities with various algae: red (Gracilaria verrucusa and Tichocarpus crinitus), brown (Sacharina cichorioides), and green (Vulva fenistrata). In these environments, their reproduction is influenced by exometabolites released by macrophytes, so the gametes with different production capacity could be formed and products of metabolism could impede their growth and development. To avoid these negative effects in polyculture, the cultured community should include species of different trophic levels forming a single food chain in which their exometabolites are utilized. The polyculture could be controlled by changing the number of species or influence on them by change of abiotic factors. In artificial polyculture, optimal conditions for reproduction and growth of cultivated species could be created, that provides the maximum production from a limited area.

Keywords

• reproduction
• exometabolite
• sea urchin
• scallop
• seaweed