Catch rate standardization for yellowfin tuna (Thunnus albacares) in Taiwan's distant-water longline fishery in the Western and Central Pacific Ocean,with consideration of target change |
| |
| Authors: | Shui-Kai Chang Simon Hoyle Hung-I Liu |
| |
| Institution: | 1. College of Marine Sciences, National Sun Yat-sen University, 70 Lien-hai Road, Kaohsiung 804, Taiwan;2. Secretariat of the Pacific Community, BP D5, 98848 Noumea, New Caledonia;3. Fisheries Information Department, The Overseas Fisheries Development Council, 19, Lane 113, Roosevelt Road, Sec. 4, Taipei, Taiwan;1. Pelagic Fisheries Research Program, Department of Oceanography, University of Hawaii at Manoa, Honolulu, HI, USA;2. Virginia Institute of Marine Science, College of William & Mary, Gloucester Point, VA, USA;1. Yale University, School of Forestry & Environmental Studies, 195 Prospect Street, New Haven, CT 06511, United States;2. Arizona State University, Global Institute of Sustainability, School of Sustainability, and Center for Environmental Economics and Sustainability Policy, PO Box 875502, Tempe, AZ 85287, United States;1. Faculty of Political and Social Sciences, University of Santiago de Compostela, Av Angel Echevarry s/n, 15782, Santiago de Compostela, A Coruña, Spain;2. Campus Do* Mar - International Campus of Excellence, Spain;1. Department of Biology and Ecology of Fishes, Leibniz-Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 310, 12587 Berlin, Germany;2. Institute of Inland Fisheries e.V. Potsdam-Sacrow, Im Königswald 2, 14469 Potsdam, Germany;3. Chair for Integrative Fisheries Management, Faculty of Agriculture and Horticulture, Humboldt-Universität zu Berlin, Invalidenstrasse 42, 10115 Berlin, Germany |
| |
| Abstract: | Catch per unit of effort (CPUE) needs to be standardized to remove the effects of factors such as fishing time and location, before it can be used as an index of abundance in fish stock assessments. One of the most substantial effects arises from a change of target species. This is particularly important for the Taiwanese distant-water longline fishery, which has a long history of fishery data from two fleets that target various tuna species across three oceans. We review the development of the Taiwanese distant-water longline fishery and compare five designs for standardizing the catch rate of yellowfin tuna (Thunnus albacares) in the western and central Pacific Ocean, using generalized linear models with lognormal and delta-lognormal error assumptions. Two approaches to address targeting effects were tested: separating fishing fleet data based on observer records, and including four target indicators calculated from catch data. Four statistical regions (relating to major fishing grounds) were treated as a single factor in the first three cases and were treated separately for the last two (one independent run for each region). The last case, which involved independent analyses for each fishing fleet for each region, and using the delta-lognormal approach, was considered to provide the most informative standardized CPUE trends for yellowfin tuna. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
