"World fishery map" which nobody knows until now is completed
Fishery is also one of the oldest industries, not only in Japan, but also in the world. However, it is said that it is impossible to monitor the fishery, and no one knew where the ship worldwide was active on the earth. Announced in ScienceGlobal Fishing WatchAccording to the survey results of David Kursma and others,Automatic ship identification device (AIS)By collecting the signals of the world's fishery map, we succeeded in building the "fishery map of the world".
Tracking the global footprint of fisheries | Science
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This survey was conducted by Global Fishing Watch,Oceana,SkyTruth,Google, And they are attached to about 70,000 vessels in preparing the "fishery map"Automatic ship identification device (AIS)Billions of signal data transmitted and received were gathered and analyzed. As a result, until nowQuantificationThe actual condition which was not done became clear. In 2016, it is shown that the fishery is conducted in 55% or more of the world's ocean area and is about four times the area occupied by agricultural activities on land. In addition, the time spent on fishing activities revealed that it reached over 40 million hours or more.
The findings seem to be a glimpse of the problem of excessive catch in the high seas where it is not strictly regulated,United Nations Food and Agriculture Organization (FAO)Issuing(PDF file)World fisheries and aquaculture white paper 2016According to 2013, 31.4% of the world's fishery resources are in the state of so-called overfishing and 58.4% of the relevant fishery remains.
Most of the fishery countries are mainly in their own economic zones, but it is better to occupy more than 85% of the fishery conducted in the high seas by the five countries of Spain, Taiwan, Japan, Korea and China Data indicated.
ByFuk Ying Tse
Scripps Oceanographic Research InstituteJeremy Jackson, a marine science specialist, said: "The data presented in this survey is nothing different than the traditionally used catch data, but the data we have been using It is wonderful to be sure that we are accurate. "
It is a fishery expert, also known worldwideUniversity of British ColumbiaofDaniel Paulie"This survey adds a new perspective as a tool kit for scientists and fishery managers," and said, "This survey is to promote the opinion that all fishing vessels should oblige AIS to be obliged In the future, it will also lead to the prevention of overfishing by small vessels that are currently not obliged to install AIS. "We highly appreciate the results of this survey being announced.
According to Kurzza et al. Research team, fishing activity tends to increase or decrease depending on politics and culture rather than fish movement and season. Although it seems that there is no decline in fishing activity at the time when the fuel price soared, for example,The spring seasonThe fishing activity by the Chinese fishing boat almost disappeared, and it turned out that it fell to the level comparable to the fishery prohibition period forced by the government.
ByKyle, Liana, Isabella & Xavier
The data obtained in this survey says that governments, management organizations and researchers will help fishery conservation and sustainability goals be achieved by better regulating fisheries.