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http://hdl.handle.net/1834/971
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| Title: | New Sampling and Data Processing Strategy for Estimating the Composition of Catches by Species and Sizes in the European Purse Seine Tropical Tuna Fisheries |
| Authors: | Pianet, R.
Pallares, P.
Petit, Ch. |
| ASFA Terms: | Purse seines
Tuna fisheries |
| Issue Date: | 2000 |
| Publisher: | IOTC |
| Citation: | IOTC Proceedings no. 3 (2000) p. 104-139. WPDCS 00 -10 |
| Abstract: | The difficulties associated with tropical tuna sampling strategies, particularly those resulting from
the large-scale adoption of the method of fishing on logs, have caused the Indian Ocean tuna
scientists concern since the beginning of the purse seine fishery, as well as the ICCAT SCRS
(Standing Committee for Research and Statistics of the International Commission for the
Conservation of Atlantic Tunas) in recent years. Upon the recommendation of this Committee, in
1996 Spain and France embarked on a European Union project aiming to study the consequences
of this new fishing tactic on the estimated catch by species and by size, and to implement a new
sampling strategy so as to improve the accuracy of the statistics.
Many specific analyses have been necessary because of the complexity of the problem. In this
regard, close attention has been given to the influence of different factors (place, time, fishing
associations, flags, vessel class, etc.) on the breakdown of catches by species and sizes, the
sampling coverage rate, the sample size, the unit of sampling, etc. In this document the results of
the different analyses conducted are described and discussed, and a new sampling system for both
east Atlantic and Indian Ocean tropical tuna purse seine catch sampling is proposed. This
document is mainly focussed on Indian Ocean, while another document (SCRS/97/28) - presented
at the last year’s ICCAT meeting – was aimed to the Atlantic Ocean. |
| URI: | http://hdl.handle.net/1834/971 |
| Appears in Collections: | Miscellaneous
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