The authors also indicated that the increase of the size of the vessels in the fleet has allowed this segment of the fleet to operate year-round even during the strong wind season and that shifts in the seasonal fishing effort and spatial distribution may contribute to observed changes in the size distribution of the catch. [...] Following the decisions of the Group during the meeting, it has been agreed to the following: - 2019 will be the terminal year for the assessment input data; - CPCs will submit fisheries statistics up to the 2019 calendar year on the catch, catch-effort, size, CAS, and CAA to the Secretariat by 30 April 2021; - The Secretariat will provide to the Group updated estimates of catch, catch-effort, siz. [...] The authors demonstrated that the influence of these variables in explaining the model was significant and allowed the model to respond to the heterogeneity of the Brazilian fleets. [...] This work was originally a part of the joint index but the development of the VAST model had faced a convergence problem for the size aggregated index, thus the results of the VAST model were not included in the paper of the Joint LL index. [...] The Group discussed the differences in the approach used to construct the joint LL dataset (e.g., aggregated versus set-by-set data), but also noted the similarity of the index for region 2 (tropical Atlantic) in the recent period (Figure 13), for which the majority of information from CPCs involved in the 2018 bigeye tuna joint index was available.
- Pages
- 56
- Published in
- Spain
