The head, the deputies and the head of the department of fisheries stock assessment of the Caspian Sea Ecology Research Center and Mr. Dehghan from the Mazandaran Department of Fisheries together with Mr. Nikkhoo, the private - sector investor, visited the research ship belonging to the Caspian Sea Ecology Research Center. The capabilities and equipment of the ship were described. Discussions were held on how the private sector should cooperate and participate in research patrols in order to assess Kilka stocks in the deep sea and make an optimum use of resources.