Abstract
In Japan’s aquaculture industry, production statistics for marine fisheries using bottom trawls, boat seine nets, set seine nets, and purse seine nets are given great importance. According to data for 2022, small bottom trawls were particularly noteworthy among bottom trawlers, with production reaching 411 kt. Past trends in marine fisheries have seen technological advances and efforts towards sustainability. In particular, with bottom trawl fishing, emphasis is being placed on diversifying the fisheries and taking into consideration the ecosystem, and there is a tendency for the production of agricultural bottom trawl to increase. Similarly, improvements are being made to fishing methods and gear, as well as management of fishing resources, for boat seine nets, set nets, and purse seine nets. These efforts are contributing to the sustainable use of marine resources and the stabilization of the fishing industry, and further efforts from the perspective of technological innovation and environmental protection are expected to continue in the future.
Catch volume using bottom trawl nets
Fishery production statistics for bottom trawl in Japan’s marine fisheries are available from 1956 to 2022. The highest production volume was 1.39Mt from one net (offshore bottom trawl) recorded in 1976, but has now fallen to about 14.1% of the peak. Characteristics so far include a decline in fishing resources and increased fishing pressure. In addition, environmental changes and strengthening regulations are also having an impact. Under these circumstances, sustainable fisheries management and technological innovation are required.
The maximum is 1.39Mt[1976] of 1 Soubiki (Offshore bottom trawling), and the current value is about 14.1%
Catch volume using boat seine nets
Japan’s marine fisheries production statistics for boat trawl include data from 1956 to 2022. The peak production volume was recorded in 2008 at 255kt and is currently down to around 49% of the peak volume. Several factors are influencing this trend. For example, there is a decline in fishing resources, increased fishing pressure, and stricter regulations. In addition, technological innovation and sustainable fisheries management efforts across the fishing industry are also important. Addressing these challenges requires scientific fisheries resource management, effective regulation, and cooperation between fishers and governments.
The maximum is 255kt[2008] of Boat net gauge, and the current value is about 49%
Catch volume using set nets
The latest data available on set net fishing production statistics for Japan’s marine fisheries is from 1956. The maximum overall production at this point was 558kt from the Sanma pole net, the average was 347kt, and the total was 672kt. Set nets are known to be an effective method for fishing in shallow waters. A notable feature so far has been that saury pole-hold nets have shown significantly higher catches. In addition, fishing using set nets can have an impact on marine ecosystems, so sustainable fisheries management is required. Going forward, it will be important to strengthen fishing policies that take into account environmental considerations and to implement technological innovation.
The maximum is 558kt[1958] of Pacific saury stick receiving net, and the current value is about 3.29%
Purse seine catch
Japan’s marine fisheries production statistics for purse seine include data from 1956 to 2022. The highest production volume was 4.06Mt from one purse seine (large to medium-sized purse seine) recorded in 1988, and has now fallen to about 16.7% of the peak. Purse seine fishing is known as an efficient method that can catch large amounts of fish over a wide area of the ocean. A notable feature of the past is the large-scale fishing that took place at the peak in 1988. However, since then, the catch has been on a downward trend due to factors such as increased fishing pressure and a decline in fishing resources. Under these circumstances, sustainable fisheries management and resource conservation are becoming increasingly important.
The maximum is 4.06Mt[1988] of 1 somaki (Large and medium-sized purse seine), and the current value is about 16.7%
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