RAI-AP-08/2004RAI-AP-08/2004

Pilot Action, of Experimental

Fishing, with Surface Long Line gear, in

Waters of Southwest Indian Ocean

Date: 12 Dec 2004 – 12 Dec 2005Date: 12 Dec 2004 – 12 Dec 2005

Having caught Having caught 2810628106 specimens, 25 were sea turtles, 3 were specimens, 25 were sea turtles, 3 were sea mammals and another 3 were sea birds. This ByCatch sea mammals and another 3 were sea birds. This ByCatch suppose 0,1% of the whole specimens caught by two Spanish suppose 0,1% of the whole specimens caught by two Spanish longliners during 2005 in Soutwest Indian Ocean.longliners during 2005 in Soutwest Indian Ocean.

RAI-AP-08/2004RAI-AP-08/2004

Number of turtles per species(n=25 specimens)

DCC Dermochelys coriacea

68%

TOE Non-identifyed12%

LOL Lepidochelys olivacea

4%

CCC Caretta caretta8%

CMM Chelonia mydas8%

Data collected are Data collected are totally insufficient to totally insufficient to get any conclusions. get any conclusions. However, there is an However, there is an important detail which important detail which is worthwhile to be is worthwhile to be taken into account: taken into account: most of sea turtlesmost of sea turtles (19) (19) were caught owing to were caught owing to one of the parts of their one of the parts of their body, mainly front body, mainly front tips, tips, were hookedwere hooked o had any o had any kind of tangle with long kind of tangle with long line. Only the caught of line. Only the caught of four of them has to be four of them has to be directly related to the directly related to the bite of hook. bite of hook.

RAI-AP-08/2004RAI-AP-08/2004

SPECIES Scientific name Maximum Depth (Head) Maximum Depth (End) Comments

CCC Caretta caretta 32,5   Tangled

      105,8 Tangled

CMM Chelonia mydas 36,1   Type of caught unknown

    36,2   Bit the hook

DCC Dermochelys coriacea 27,5 41,2 Tangled

    27,7 31,5 Tangled

    29,0 41,2 Tangled

    32,5   Tangled

    37,0 70,0 Tangled

    37,2   Tangled

    43,4   Tangled

    44,5 90,7 Tangled

    115,4   Tangled

    125,2   Bit the hook

    128,5 46,3 Tangled

    185,6   Tangled

      23,7 Tangled

      56,0 Tangled

      102,7 Tangled

      155,4 Bit the hook

        Type of caught unknown

LOL Lepidochelys olivacea   26,0 Tangled

TOE Tortuga de placas no identificada 35,6   Tangled

    96,3 39,1 Bit the hook

      54,1 Tangled

RAI-AP-08/2004RAI-AP-08/2004

Percentages of sea turtles depending on the type of caught (n=25 specimens)

Type of caught unknown

8%

Tangled76%

Bit the hook16%