Document Number:
WG-SAM-2019/09
Submitted By:
Dr Kota Sawada (Japan)
Approved By:
Dr Taro Ichii
Abstract
We report a preliminary result of statistical modeling of grenadier bycatch pattern by bottom longline research fisheries in CCAMLR Subarea 48.6, using generalized linear mixed models with zero-inflation. The result contains several issues including the failure of estimation in considerable number of candidate models, overdispersion and insufficient prediction of zero-catch, suggesting that further improvement is required.