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Report of the Fifteenth Session of the IOTC Working Party on Tropical Tunas









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    Report of the Ninth Session of the IOTC Working Party on Data Collection and Statistics 2013
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    The Ninth Session of the Indian Ocean Tu Commission’s (IOTC) Working Party on Data Collection and Statistics (WPDCS) was held in Busan, Rep. of Korea, from 29 to 30 November 2013. A total of 23 participants attended the Session. The following are a subset of the complete recommendations from the WPDCS09 to the Scientific Committee, which are provided at Appendix VI. The WPDCS RECOMMENDED that the IOTC Scientific Committee considers to propose amendments to IOTC Resolution 10/02 to the Commission . (WPDCS09.01 (para. 14)) The WPDCS RECOMMENDED that the total number of days-at-sea covered by observers versus the total number of days-at-sea for each fleet over a year is used to estimate levels of coverage by observers under the Regiol Observer Scheme, instead of the number of trips. (WPDCS09.02 (para. 15)) The WPDCS RECOMMENDED that India reports a revised time-series of catch and effort for its longline fleet to the IOTC. (WPDCS09.04 (para. 25)) The WPDCS RECOMMENDED that Iran reports the available series of catch and effort data for its fisheries as a matter of priority. (WPDCS09.05 (para. 29)) The WPDCS RECOMMENDED that the IOTC Secretariat considers funding scientists and statistical officers from non IOC countries to the IOC-SmartFish funded regiol Workshop to understand the IOTC Data Requirements, in particular scientists and statistical officers from Iran, Indonesia, and Sri Lanka. (WPDCS09.06 (para. 31) The WPDCS RECOMMENDED that joint work on the documentation of procedu res for the collection, processing and reporting of size frequency data continues, based on a template produced by the IOTC Secretariat. (WPDCS09.07 (para. 41)) The WPDCS RECOMMENDED that the Commission considers funding of future activities under the Regiol Observer Scheme, by allocating specific funds to the implementation of capacity building activities in developing coastal countries of the IOTC Region. (WPDCS09.08 (para. 54)) The WPDCS NOTED that Maldives is working with the IOTC Secretaria t in the estimation of ratios of catch yellowfin tu:bigeye tu for its fisheries, and RECOMMENDED that Maldives filizes this work as soon as possible and reports a new series of catch to the IOTC and the results of this alysis to the next Meeting of the WPDCS and WPTT. (WPDCS09.09 (para. 59)) The WPDCS AGREED on the need to select a set of official equations to be used in the preparation of input files for the assessments of stocks of IOTC species and sharks, or other procedures used on those ass essments and RECOMMENDED that document IOTC–2013–WPDCS09–13 Rev_1 is forwarded to the Working Parties concerned for further consideration. The WPDCS further RECOMMENDED that, where possible, the Working Parties contemplate the use of keys to convert from non-standard measurements to standard measurements over deterministic methods. (WPDCS09.10 (para. 67)) The WPDCS RECOMMENDED that the IOTC Secretariat creates a template, preferably using MS Excel, to facilitate reporting of the Observer Trip Re ports, and makes it available through the IOTC Web Page. (WPDCS09.11 (para. 68)) The WPDCS NOTED the plans from the IOTC Secretariat to resume publication of the IOTC Data Summary in electronic form and RECOMMENDED that the IOTC Secretariat carries out this work during 2014 and presents the new Web based system to the next meeting of the WPDCS. (WPDCS09.12 (para. 69)) The WPDCS RECOMMENDED that the Scientific Committee note the new Chairperson, Dr Emmanuel Chassot (EU-France), of the WPDCS for t he next biennium. (WPDCS09.13 (para. 72))
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    Report of the Ninth Session of the IOTC Working Party on Data Collection and Statistics 2013
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    The Ninth Session of the Indian Ocean Tu Commission’s (IOTC) Working Party on Data Collection and Statistics (WPDCS) was held in Busan, Rep. of Korea, from 29 to 30 November 2013. A total of 23 participants attended the Session. The following are a subset of the complete recommendations from the WPDCS09 to the Scientific Committee, which are provided at Appendix VI. The WPDCS RECOMMENDED that the IOTC Scientific Committee considers to propose amendments to IOTC Resolution 10/02 to the Commission . (WPDCS09.01 (para. 14)) The WPDCS RECOMMENDED that the total number of days-at-sea covered by observers versus the total number of days-at-sea for each fleet over a year is used to estimate levels of coverage by observers under the Regiol Observer Scheme, instead of the number of trips. (WPDCS09.02 (para. 15)) The WPDCS RECOMMENDED that India reports a revised time-series of catch and effort for its longline fleet to the IOTC. (WPDCS09.04 (para. 25)) The WPDCS RECOMMENDED that Iran reports the available series of catch and effort data for its fisheries as a matter of priority. (WPDCS09.05 (para. 29)) The WPDCS RECOMMENDED that the IOTC Secretariat considers funding scientists and statistical officers from non IOC countries to the IOC-SmartFish funded regiol Workshop to understand the IOTC Data Requirements, in particular scientists and statistical officers from Iran, Indonesia, and Sri Lanka. (WPDCS09.06 (para. 31) The WPDCS RECOMMENDED that joint work on the documentation of procedu res for the collection, processing and reporting of size frequency data continues, based on a template produced by the IOTC Secretariat. (WPDCS09.07 (para. 41)) The WPDCS RECOMMENDED that the Commission considers funding of future activities under the Regiol Observer Scheme, by allocating specific funds to the implementation of capacity building activities in developing coastal countries of the IOTC Region. (WPDCS09.08 (para. 54)) The WPDCS NOTED that Maldives is working with the IOTC Secretaria t in the estimation of ratios of catch yellowfin tu:bigeye tu for its fisheries, and RECOMMENDED that Maldives filizes this work as soon as possible and reports a new series of catch to the IOTC and the results of this alysis to the next Meeting of the WPDCS and WPTT. (WPDCS09.09 (para. 59)) The WPDCS AGREED on the need to select a set of official equations to be used in the preparation of input files for the assessments of stocks of IOTC species and sharks, or other procedures used on those ass essments and RECOMMENDED that document IOTC–2013–WPDCS09–13 Rev_1 is forwarded to the Working Parties concerned for further consideration. The WPDCS further RECOMMENDED that, where possible, the Working Parties contemplate the use of keys to convert from non-standard measurements to standard measurements over deterministic methods. (WPDCS09.10 (para. 67)) The WPDCS RECOMMENDED that the IOTC Secretariat creates a template, preferably using MS Excel, to facilitate reporting of the Observer Trip Re ports, and makes it available through the IOTC Web Page. (WPDCS09.11 (para. 68)) The WPDCS NOTED the plans from the IOTC Secretariat to resume publication of the IOTC Data Summary in electronic form and RECOMMENDED that the IOTC Secretariat carries out this work during 2014 and presents the new Web based system to the next meeting of the WPDCS. (WPDCS09.12 (para. 69)) The WPDCS RECOMMENDED that the Scientific Committee note the new Chairperson, Dr Emmanuel Chassot (EU-France), of the WPDCS for t he next biennium. (WPDCS09.13 (para. 72))
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    Report of the Eleventh Session of the IOTC Working Party on Billfish 2013
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    The Eleventh Session of the Indian Ocean Tu Commission?s (IOTC) Working Party on Billfish (WPB) was held in La Réunion, France, from 18 to 22 September 2013. A total of 24 (23 in 2012) participants attended the Session, including one invited expert, Dr. Humber Andrade, from the Universidade Federal Rural de Permbuco, Brazil. The meeting was opened on 18 September, 2013 by the Chair, Dr Jérôme Bourjea (La Réunion, France), who welcomed participants to La Réunion, France. Catch, Catch-and-effort, Size data The WPB RECOMMENDED that all CPCs assess and improve the status of catch-and-effort data for marlins (by species) and sailfish, noting that improvements to the data for the EU fleets and its provision to the IOTC Secretariat, would be most beneficial to the work of the WPB. (para. 25) Effect of piracy on billfish fisheries The WPB NOTED that, although no specific alysis of the impacts of piracy on fisheries in the Indian Ocean were presented at this meeting, paper IOTC–2013–WPB11–07 Re v_1 indicated that there has been a substantial displacement of catch (Fig. 1) and effort eastward (Fig. 2). Since 2004, annual catches have declined steadily, largely due to the continued decline in the number of active Taiwan,Chi longliners in the Indian Ocean (Fig. 3). In recent years, the proportion of fishing effort of the Japanese longline fleet sharply decreased in the north-western Indian Ocean (off the Somalia coastline), while fishing effort increased in the area south of 25°S, especia lly off western Australia. (para. 40) The WPB NOTED that the relative number of active longline vessels in the IOTC area of competence have declined substantially since 2008 (Fig. 3), and AGREED that this was likely due to the impact of piracy activities in the western Indian Ocean. Since 2011, there has been an increase in the relative number of active longline vessels in the Indian Ocean for Japan (68 in 2011 to 98 in 2012), Chi (10 in 2011 to 32 in 2012) and the Philippines (2 in 2011 to 14 i n 2012) (Fig. 3). (Para. 41) Pakistan gillnet fishery RECALLING IOTC Resolution 12/12 to prohibit the use of large-scale driftnets on the high seas in the IOTC area, paragraph 1, which states: “1. The use of large-scale driftnets on the high seas within the IOTC area of competence shall be prohibited.” “Large-scale driftnets” are defined as gillnets or other nets or a combition of nets that are more than 2.5 kilometers in length whose purpose is to enmesh, entrap, or entangle fish by drifting on the surface of, or in, the water column.”, the WPB RECOMMENDED that the SC note the findings of the study that gillnets in excess of the 2.5 km limit are being used by the gillnet fleets of Pakistan on the high seas, in contravention of Resolution 12/12. (para. 44) Revision of the WPB workplan The WPB RECOMMENDED that the SC consider and endorse the workplan and assessment schedule for the WPB for 2014, and tentatively for future years, as provided at Appendix XII and Appendix XIII, respectivel y. (para 192) Consolidated recommendations of the Eleventh Session of the Working Party on Billfish The WPB RECOMMENDED that the Scientific Committee consider the consolidated set of recommendations arising from WPB11, provided at Appendix XIV, as well as the magement advice provided in the draft resource stock status summary for each of the billfish species under the IOTC mandate: (para 205) o Black marlin (Makaira indica) – Appendix VII o Blue marlin (Makaira nigricans) – Appendix VIII o Strip ed marlin (Tetrapturus audax) – Appendix IX o Indo-Pacific sailfish (Istiophorus platypterus) – Appendix X o Swordfish (Xiphias gladius) – Appendix XI ???????????????????A summary of the stock status for billfish species under the IOTC mandate is provided in Table 1.

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