2014年山口県阿武町奈古定置網の伝票をもとにした水揚げ個体数の推定に関する予備的調査

Preliminary Study on Estimation of Abundance based on the Slips regarding the Catches Landed by Set Net off Nago, Abu Town, Yamaguchi Prefecture, Japan in 2014

Creators Tanoue Hideaki

Creators Imachi Hiroaki

Creators Suizu Takanori

Creators Yokota Shun

Creators Nagai Setsuko

Creators Fukumura Naoto

Creators Kajikawa Yoritake

Creators Mohri Masahiko

Most of the slips for catches landed by set net fishery describe the number of boxes every catch shipped in Japan. The number of the catches contained in each box (“irisū”) depends on the species. Furthermore, even among the same species, the “irisū” may change depending on the season. In this study,　under the cooperation of fishermen, with reference to their catch slips, the abundance by species of the catches landed was estimated by researching the contents of the boxes in Nago, Abu Town, Yamaguchi Prefecture, Japan, 2014. The number of operation days was 206, which amounted to the monthly average number of operation days of 17.2 ± 3.4 (average ± SD). The number of species shipped in the same year amounted to 61 with the monthly average of 22.8 ± 5.8. We interviewed fishermen to get the relationship between the species or fishes whose brand names may change depending on the season and the respective “irisū”. Based on the results of the interview, the total abundance of catches landed (exclude “iromono” boxes to be shipped with some different fish species) was estimated to 218,543 and the average abundance shipped per operation day amounted to 943.3 ± 1297.9.

[ISSN]0370-9361