下関市蓋井島における定置網漁獲物の分類学的多様度 (Δ+)

Taxonomic Diversity (Δ+) of Fishes Caught by Set Net Fishery on Futaoi-jima island, Shimonoseki, Japan

Creators Tanoue Hideaki

Creators Imachi Hiroaki

Creators Nozoe Akira

Creators Mohri Masahiko

This study attempted to show the diversity of fish caught by set net fishing on Futaoi-jima island, Japan by the taxonomic diversity (Δ+). Futaoi-jima island is located in Japan Sea in the western part of Shimonoseki, Yamaguchi Prefecture (lat. 34˚06' 13.5” N. and long. 130˚47’ 12.5” E). We read the fish species for each day stated in the catch slips in 2002 (No. operations: 249 days) and 2003 (241 days) and in 2012 (242 days) and 2013 (234 days), ten yeas after, and prepared a landed database. The numbers of species caught for four research years were 80, 79, 82, and 82, respectively. Diversity indices of fishes caught, as measured by Δ+, were 0.70, 0.71, 0.68, and 0.69, respectively.

[ISSN]0370-9361