Estimation of mantle length composition of neon flying squid caught by Chinese Taipei’s squid jigging fishery

This study investigated the relationship between weight category and mantle length (ML) distribution of neon flying squid (Ommastrephes bartramii, NFS) caught by Chinese Taipei’s squid jigging vessels in the North Pacific. A total of 4449 NFS individuals were measured during 1992–2001, although some samples lacked associated date records. Because BW category information was not recorded in the biological data, BW categories were subsequently assigned based on individual body weight. The ML distribution for each BW category can be calculated from the biological samples. The monthly catch in weight was converted to catch in number using the average individual BW of each BW category. The monthly ML composition of NFS catch can be calculated from BW category data for 2022–2024. The results may be useful for stock identification of NFS in the North Pacific.