Thumbnail Image

Review of the statistical data and fishery trends for billfish









Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Meeting
    Review of the statistical data and fishery trends for tropical tunas (2013) 2013
    Also available in:
    No results found.

    PURPOSE To provide the Working Party on Tropical Tus (WPTT) with a review of the status of the information available on tropical tu species in the databases at the IOTC Secretariat as of September 2013, as well as a range of fishery indicators, including catch and effort trends, for fisheries catching tropical tus in the IOTC area of competence. It covers data on nomil catches, catch-and-effort, size-frequency and other data, in particular release and recapture (tagging).
  • Thumbnail Image
    Meeting
    Report of the Eleventh Session of the IOTC Working Party on Billfish 2013
    Also available in:
    No results found.

    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.
  • Thumbnail Image
    Document
    Comprehensive Report IOTC-OFCF Project Phase II (June 2007 ~ March 2010) 2014
    Also available in:
    No results found.

    Since April 2002, in the framework of the IOTC-OFCF Project, the Indian Ocean Tu Commission (IOTC) and the Overseas Fishery Cooperation Foundation of Japan (OFCF) have been devoting a considerable amount of time and resources to enhancing data collection and processing systems for tu fisheries in the developing countries of the IOTC region. For this purpose, the Project initiated a broad range of activities involving cooperation with institutions in the recipient countries, including:   strength ening of data collection through extension of field activities; capacity-building activities in the areas of data collection and magement, including database support; documentation of fisheries in the IOTC region; and recovery of historical data on fisheries targeting tu or tu-like species. Phase I of the Project was implemented during five years, from April 2002 to March 2007. The activities initiated during Phase I contributed substantially to improving the quality of the data in the IOTC data bases, in particular the quality of nomil catches and size-frequency data for the fleets involved. Following the success of Phase I of the Project, the OFCF agreed to support the implementation of a new phase which would extend the activities of the Project for a maximum of three years, from 2007 to 2010. The present report covers the activities of the IOTC-OFCF Project during Phase II, and also includes an overview of the activities implemented through Phase I and the current status of implemen tation of the recommendations issuing from those activities. The following activities were implemented by the Project during Phase II: Comoros: The Project sent a mission to assess the status of data collection in that country. Indonesia: The Project provided equipment and materials for enhancing effort data collection for the Indonesian fresh tu longline vessels. A workshop on the Indonesia logbook programme was held in May 2009, with the collaboration of the Indonesian Directorate General of C apture Fisheries and other tiol and intertiol organizations, including the Western and Central Pacific Fisheries Commission (WCPFC) and the Commission for the Conservation of Southern Bluefin Tu (CCSBT), in order to assist in initiating Indonesia’s own programme. Kenya: The Project carried out verification of the data collected from the sport fisheries of Kenya that were compiled during Phase I of the Project. Mauritius: The Project sent a mission to assess the importance of foreign fresh-tu lon gline fisheries in the Southwest Indian Ocean region. Oman: Sampling programmes were carried out in Oman for collecting size data for three species caught by the artisal fisheries in the Arabian Sea from January 2009 to December 2009. Thailand: The Project contributed to the establishment of a data-processing system for industrial tu purse seiners registered in Thailand. Yemen: The Project sent missions in order to assess the status of data collection in that country and propose further actions to improve the quality of the statistics available from Yemen. The Project agreed to provide support for the compilation and computerization of historical data from the artisal fisheries in Yemen; unfortutely, the Project was uble to filize the agreement for these activities to be initiated within Phase II of the Project. The Project contributed substantially to improving the quality of the statistics available at the IOTC, including better catch, effort and, in particular, size-frequency data. In addition, the Project addressed recommendations concerning the fisheries under study which, if implemented by the institutions concerned, may lead to significant improvements in the area of data collection, processing and reporting. On numerous occasions, the IOTC Scientific Committee and other IOTC technical bodies stressed the importance of the activities initiated by the Project, noting that the information collected is of key importance for the assessments of some of the main IOTC stocks.

Users also downloaded

Showing related downloaded files

No results found.