752 



Fishery Bulletin 102(4) 



Q. 

 CD 

 D 



9/1/02 9/4/02 9/7/02 9/10/02 9/13/02 9/16/02 9/19/02 



B 



9/1/02 9/4/02 9/7/02 9/10/02 9/13/02 9/16/02 9/19/02 



9/1/02 9/4/02 9/7/02 9/10/02 9/13/02 9/16/02 9/19/02 



WM2 



8/3/03 8/6'03 8/9/03 8/12/03 8/15/03 8/18/03 8/21/03 8/24/03 



E 



32 



28- 



24- 

 20- 



8/3/03 8/6/03 8/9/03 8/12/03 8/15/03 8/18/03 8/21/03 8/24/03 



8/3/03 8/6/03 8/9/03 8 12/03 8/15/03 8/18/03 8/21/03 8 24,03 



Figure 1 



Graphs of data on and depth (A and Di. temperature (B and E), and light index iC and Fl for tags WM1 

 and WM2. Lighter lines and points are prior to programmed release date, whereas darker lines and points 

 are "real-time" surface condition measurements transmitted by the tag in addition to the archived data. 



recording by the PSAT (one hour after activation) was 

 11°C (Fig. IB). The temperature remained fairly con- 

 stant at 11°C for a period of approximately ten hours 

 after which there was a rapid rise to 25°C. The temper- 

 ature of the PSAT remained between 22.5° and 26. 5C 

 for the next nine days (until the programmed release 

 date), with the exception of one brief decrease to 20 C 

 on 8 September. When the tag began transmitting on 

 12 September, the real-time surface temperature was 

 23.6°C. 



The pressure data (Fig. IC) indicated that the tag was 

 at a depth of approximately 145 m at one hour following 

 release. The PSAT remained at this depth for a little 

 more than ten hours after which the data suggested 

 that there was a rapid rise to the surface. For the next 

 nine days, the tag reported considerable vertical move- 



ment between the surface and depths to 565 m. The 

 tag was at the surface when it began transmitting both 

 archived and real-time data on 12 September. 



WM2 



The tag reported data as expected on 13 August 2003 

 and transmitted 57.3 r r of the archived data. At the time 

 of first transmission, the PSAT was 600.1 km (324.0 

 nmi) east-southeast of the tagging location. Summary 

 depth and temperature data recorded by the PSAT are 

 included in Table 1. 



From the depth and temperature data, it appears 

 that the fish survived for approximately 24 hours af- 

 ter release, at which point the light readings dropped 

 to zero (see Fig, ID) and remained at that level for 



