Support and reconstruction of fishery in the estuary and coastal area

Fiscal Year

2018

Title

Support and reconstruction of fishery in the estuary and coastal area

Project and Theme

Project 1. Study on ecological succession of fisheries ground
Representative Organization: Tohoku University
Theme2. Towards sustainable fisheries reconstruction along the shores of Miyagi Prefecture
Representative personMakoto Osada
OrganizationTohoku University
DepartmentGraduate School of Agricultural Science
Theme2. Towards sustainable fisheries reconstruction along the shores of Miyagi Prefecture
Representative personMotoyuki Hara
OrganizationTohoku University
DepartmentGraduate School of Agricultural Science

Research Information

Period and Interval
2018/04/01 - 2019/03/31
Monthly
Research Area
The Natori River Estuary, Sendai Bay and Ishinomaki Bay
Category
Field survey
Overview
1. Survey on the environmental conditions of fishery ground of bivalves. Continuous observation of salinity and water temperature. Analyses of grain size distribution and silt -clay % of bottom sediment. Analyze the topographical change of river mouth using aerial photos. 2. Survey on the resources of the bivalves. Collection of Clams at 18 stations in the Natori river estuary. Calculation of Population density and size composition. 3. Study on primary production in the estuary. Development of new device on suction to collect water within 1cm layer on the bottom. Analyses of salinity, nutrients and stable isotope ratios of bottom water. Analyses of C, N- stable isotope ratios of bivalves. 4. Survey on the Ayu population. Collection of Ayu using casting net at 3 stations in the Natori and Hirose River. Analyses of size composition and carbon and nitrogen stable isotope ratios of Ayu. 5. Estimation of the present stock of the Surf clam. Collection of the Surf clams in Sendai Bay, off Yamamoto. Analyses of Population density and shell length composition. 6. Estimation of the stock of the Ark shell. Estimation of population status in the release and restocking are Simulation of fisheries management.

Investigation Item and Data Acquisition

Investigation ItemData Acquisition
Survey on the distribution of bivalves in the estuaryPopulation density, shell length composition, wet weight composition
Survey on the environmental conditionswater temperature, salinity
survey on the environmental conditions on the bottomGrain size composition, silt-clay contents, Toal organic carbon and nitrogen
Survey on upstreaming Ayu populationCPUE(Catch Per Unit Effort)
Survey on the Surf clam populationPopulation density of the Surf clam and size composition

Reference

Related Observation Result
FY2018 Support and reconstruction of fishery in the estuary and coastal area

Person in charge of Investigation

Representative personKinuko Ito
OrganizationTohoku University
DepartmentGraduate School of Agricultural Science

Keywords

Fiscal Year2018
OrganizationTohoku University
CategoryField survey
Research AreaSouth Sanriku
DisciplineOcean physics -> Water temperature
Ocean physics -> Salinity
Ocean chemistry -> Salinity
Ocean chemistry -> Nutrients
Ocean environment -> Nutrients
Ocean biology / Ocean ecology -> Ecology
Ocean biology / Ocean ecology -> Fishes
Ocean biology / Ocean ecology -> Protists
Ocean biology / Ocean ecology -> Plankton
Topography / Geology / Geophysics -> Bathymetry
Topography / Geology / Geophysics -> Topography