ROLE OF THE MURMANSK SPAWNING FOR COD POP ULATION MAINTENANCE IN BARENTS SEA

In the Motow bay, the Barents cod spawn when the Atlantic Ocean is int o warm phase and Barents cod populations have a large number of adult fish. When the big fish are foraging along south-east coast of the Mot ow bay, and then prespawning fish migrate near the Murmansk shelf a li kelihood of the successful spawn is highest. The first stage of spawn development is prolonged by the low water temperatures because spawns are staying for a long time away from the Murmansk shelf. As a result, many spawns are dead before the larva's stage, and very few larvae de velop at pelagic or bottom forms. Sub adult fish also has a little cha nce to survive because they are not in time to adapt itself to cold se ason. By these means, slow development spawn on the first stage delay the next ontogenetic stages, and get a little chance for surviving of young cod that was born in the Motow bay.