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Research Topics

Overall Objective 1: Study on ecological succession of fishery grounds

  • Mid-range Research Subject 1

    Environmental monitoring in coastal sea areas of Miyagi Prefecture

    The coastal sea areas of Miyagi Prefecture include a vast number of fisheries and culture farms. Due to the earthquake and tsunami the environment of these coastal sea areas has witnessed a dramatic change. To assess the impact we use survey ships and buoys in order to continuously collect physical, chemical and biological data on water and sediment quality, water temperature, salinity, dissolved oxygen and abundance and species composition of plankton. These data are used to understand the environment of the fisheries in the coastal sea areas of Miyagi Prefecture after the March 2011 earthquake and tsunami catastrophe.

    A survey buoy deployed in Onagawa Bay

    Offshore survey

  • Mid-range Research Subject 2

    Ecosystems and genetic research to conserve and restore the coastal fisheries areas in Miyagi Prefecture

    The tsunami and subsidence caused by the mega-earthquake had changed the environment on a large-scale in the Sanriku coastal area where is known as one of the world's richest fishing grounds. To conserve the coastal ecosystem, we have been monitoring the dynamics and recovery processes of seaweed bed communities such as the kelp "Arame" (Eisenia bicyclis) bed and animals. Furthermore, we survey the genetic diversity of benthic invertebrates and demersal fishes distributed along the Sanriku coast.

    SCUBA survey

    A kelp bed of Arame

  • Mid-range Research Subject 3

    Researches on the coastal fisheries resources and the tidal flat fauna in Miyagi Prefecture

    Sandy beach and tidal flat areas received huge disturbance. Beside that, subsidence and remained debris are still obstructing the recover of ecosystem and the fisheries activity. To know the status and recovering process of the coastal ecosystem, we continue monitoring of fisheries resources (fishes and bivalves) , benthos, planktons, and fauna in the coastal shallow sea areas, tidal flats, and lower rivers in Miyagi Prefecture.

    Benthos

    Estuary corbiculidae survey

  • Mid-range Research Subject 4

    Aquaculture environment in the coastal water of Miyagi Prefecture and innovation of aquaculture systems

    The tsunami caused by the mega-earthquake has caused great damage to cultivation facilities for fish and shell cultures along the Sanriku coast. Aiming for the rebuilding of the cultivation system, we investigate the efficient production of, for example, oysters, clams, scallops fishes and the conditions of the cultures' growth. We also survey the harm caused by chemical materials and the degree of pollution as an impact of the March 2011 disaster and investigate responses for aquaculture production.

    Production of oysters

    Measuring the growth of oysters

  • Mid-range Research Subject 5

    Studies on the coastal environment and marine resources in the southern part of Iwate Prefecture

    With the aim of impact statement of the tsunami and ground subsidence, we conduct monthly investigations of nutrients, water temperature, salinity as seawater properties, phytoplankton including toxic micro-algae, zooplankton including jelly fish, intertidal organisms, and fish larvae and juveniles as biological components in Okirai bay and Ofunato bay in southern Iwate Prefecture. Furthermore, we investigate the gentic structures of the Ezo abalone, sea cucumber and northern sea urchin from the aspect of genetics of natural populations. Through these studies we contribute to the recovery of fisheries and coastal areas.

    Survey at Okirai bay

    Intertidal organisms