Estimation of tuna fishing capacity from stock assessment related information.
These Proceedings include (i) the Report of and (ii) the paper presented at the Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-Related Information. The Workshop was hosted by the Inter-American Tropical Tuna Commission (IATTC) in La Jolla, California, USA, from 14 to16 May 2007. It was organized by FAO’s Japan-funded Project on the “Management of Tuna Fishing Capacity: Conservation and Socio-Economics” in collaboration with and with in-kind support of several international and national fisheries institutions involved tuna fisheries research and management. The paper presented at the Workshop describes peak-to-peak (PP) and general additive modeling (GAM) approaches to estimate fishing capacity and related quantities from stock assessment information. The PP and GAM methods were applied to seven stocks of bigeye, yellowfin and skipjack tuna of the Pacific, Indian and Atlantic Oceans. The estimated trends in overca pacity with both methods were consistent across most of the stocks, showing increasing trends at the beginning of the time series and reaching maximum values during the late 1990s, followed by decreasing trends after that. For most of the stocks analyzed, overcapacity was positive during a part of the time series. Sensitivity tests revealed greater estimates of capacity output when the stock assessment data were most disaggregated. Further tests revealed that the estimates of overcapacity were l ower when low variability in effort deviations was permitted in the stock assessment. The Report of the Workshop outlines the discussions carried out at the Workshop, some proposals for further research, recommendations and conclusions of the Workshops.
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dig-fao-it-20.500.14283-I1212E2024-03-16T15:30:08Z Estimation of tuna fishing capacity from stock assessment related information. Estimation of tuna fishing capacity from stock assessment related information. Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-related Information. La Jolla, California, United States of America, 14–16 May 2007. Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-related Information. La Jolla, California, United States of America, 14–16 May 2007. Majkowski, J.;Fishery and Aquaculture Economics and Policy Division These Proceedings include (i) the Report of and (ii) the paper presented at the Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-Related Information. The Workshop was hosted by the Inter-American Tropical Tuna Commission (IATTC) in La Jolla, California, USA, from 14 to16 May 2007. It was organized by FAO’s Japan-funded Project on the “Management of Tuna Fishing Capacity: Conservation and Socio-Economics” in collaboration with and with in-kind support of several international and national fisheries institutions involved tuna fisheries research and management. The paper presented at the Workshop describes peak-to-peak (PP) and general additive modeling (GAM) approaches to estimate fishing capacity and related quantities from stock assessment information. The PP and GAM methods were applied to seven stocks of bigeye, yellowfin and skipjack tuna of the Pacific, Indian and Atlantic Oceans. The estimated trends in overca pacity with both methods were consistent across most of the stocks, showing increasing trends at the beginning of the time series and reaching maximum values during the late 1990s, followed by decreasing trends after that. For most of the stocks analyzed, overcapacity was positive during a part of the time series. Sensitivity tests revealed greater estimates of capacity output when the stock assessment data were most disaggregated. Further tests revealed that the estimates of overcapacity were l ower when low variability in effort deviations was permitted in the stock assessment. The Report of the Workshop outlines the discussions carried out at the Workshop, some proposals for further research, recommendations and conclusions of the Workshops. 2023-10-05T10:41:42Z 2023-10-05T10:41:42Z 2009 2020-11-10T12:31:02.0000000Z Book (series) 9789251064344 1813-3940 https://openknowledge.fao.org/handle/20.500.14283/I1212E http://www.fao.org/3/a-i1212e.pdf English FAO Fisheries Proceedings 2070-6103 - P16 FAO application/pdf |
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These Proceedings include (i) the Report of and (ii) the paper presented at the Workshop to Further Develop, Test and Apply a Method for the Estimation of Tuna Fishing Capacity from Stock Assessment-Related Information. The Workshop was hosted by the Inter-American Tropical Tuna Commission (IATTC) in La Jolla, California, USA, from 14 to16 May 2007. It was organized by FAO’s Japan-funded Project on the “Management of Tuna Fishing Capacity: Conservation and Socio-Economics” in collaboration with and with in-kind support of several international and national fisheries institutions involved tuna fisheries research and management. The paper presented at the Workshop describes peak-to-peak (PP) and general additive modeling (GAM) approaches to estimate fishing capacity and related quantities from stock assessment information. The PP and GAM methods were applied to seven stocks of bigeye, yellowfin and skipjack tuna of the Pacific, Indian and Atlantic Oceans. The estimated trends in overca pacity with both methods were consistent across most of the stocks, showing increasing trends at the beginning of the time series and reaching maximum values during the late 1990s, followed by decreasing trends after that. For most of the stocks analyzed, overcapacity was positive during a part of the time series. Sensitivity tests revealed greater estimates of capacity output when the stock assessment data were most disaggregated. Further tests revealed that the estimates of overcapacity were l ower when low variability in effort deviations was permitted in the stock assessment. The Report of the Workshop outlines the discussions carried out at the Workshop, some proposals for further research, recommendations and conclusions of the Workshops. |
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Book (series) |
author |
Majkowski, J.;Fishery and Aquaculture Economics and Policy Division |
spellingShingle |
Majkowski, J.;Fishery and Aquaculture Economics and Policy Division Estimation of tuna fishing capacity from stock assessment related information. |
author_facet |
Majkowski, J.;Fishery and Aquaculture Economics and Policy Division |
author_sort |
Majkowski, J.;Fishery and Aquaculture Economics and Policy Division |
title |
Estimation of tuna fishing capacity from stock assessment related information. |
title_short |
Estimation of tuna fishing capacity from stock assessment related information. |
title_full |
Estimation of tuna fishing capacity from stock assessment related information. |
title_fullStr |
Estimation of tuna fishing capacity from stock assessment related information. |
title_full_unstemmed |
Estimation of tuna fishing capacity from stock assessment related information. |
title_sort |
estimation of tuna fishing capacity from stock assessment related information. |
publishDate |
2009 |
url |
https://openknowledge.fao.org/handle/20.500.14283/I1212E http://www.fao.org/3/a-i1212e.pdf |
work_keys_str_mv |
AT majkowskijfisheryandaquacultureeconomicsandpolicydivision estimationoftunafishingcapacityfromstockassessmentrelatedinformation AT majkowskijfisheryandaquacultureeconomicsandpolicydivision workshoptofurtherdeveloptestandapplyamethodfortheestimationoftunafishingcapacityfromstockassessmentrelatedinformationlajollacaliforniaunitedstatesofamerica1416may2007 |
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