were not so susceptible to tagging injury 

 as immature salmon. 



To determine whether a full-twist knot 

 in the pointed end of the tagging pins would 

 result in less loss of tags than a half-twist 

 knot, one tagging crew used a half-twist 

 knot and one a full-twist (fig. 4). The addi- 

 tional time required to make the full-twist 

 knot averaged about 2 seconds. 



To publicize the tagging program to the 

 fishermen, each tag returned was exchanged 

 for a silver dollar. Silver dollars attract 

 attention because very few are in circulation 

 in the areas where tags were expected to 

 be recovered. 



The general tagging locality was from Deer 

 Island off the southwestern shore of the 

 Alaska Peninsula to Cape Lutke on Unimak 

 Island (fig. 1). We spent most effort in cap- 

 turing fish in the area between Cape Pankof 

 and Cape Lutke, and tagged most fish in the 

 vicinity of Cape Lutke between June 15 and 

 25. A few salmon were tagged along the 



mainland shore from Ikatan Bay to Deer 

 Island between July 8 and 14. The fishing 

 locations and the numbers of salmon tagged 

 are listed in table 1. 



iSIMi-dlVH 



isi«i-mnd 



Figure 4. — Tagging pins showing half- and full- 

 twlst knot used in experiments to test tag 

 loss. 



Table 1. --Fishing locations and numbers of salmon tagged in experiments off south shore of 

 Unimak Island and southwestern shore of Alaska Peninsula, 1961 



Fishing location 



Tow 



Salmon tagged 



Date 



Latitude 

 north 



Longitude 

 west 



Vicinity 



Direction 

 net open 



Time Sockeye 



Chum 



Pink 



King 



Coho 



June 

 15 

 15 

 15 

 16 

 16 

 17 

 17 

 17 

 19 

 19 

 19 

 20 

 20 

 21 

 21 

 22 

 22 

 23 

 2-4 

 24. 

 25 

 25 

 25 

 26 

 26 

 26 

 28 

 28 

 28 



5A036 ' 



54°34' 

 54O32 I 



54^28' 



5V8' 

 54 27' 

 54°26 ' 

 54° 34 ' 

 •;4°34' 

 54°29 



163°12' 



163°38' 



164O07 ' 



163°37' 



164°i7' 



164 14' 



164°17 



164°20 



164q00 



164_o9 



164 16 



Cape Pankof 

 Cape Lazaref 

 Unimak Bight 

 Cape Lazaref 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 



Unimak Bight 

 Unimak Bight 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 

 Unimak Pass 

 Cape Pankof 

 Cape Pankof 

 Cape Pankof 

 Cape Pankof 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 

 Cape Lutke 

 Cape Pankof 

 Cape Pankof 

 Cape Pankof 

 Deer Island 

 Deer Island 

 Deer Island 



ESE 

 ESE 



E 



E 



NE 

 NE 

 NE 

 NE 

 NE 

 NE 

 NE 

 NE 

 NE 



E 



E 

 ESE 

 NE 

 NE 

 NE 

 NE 

 NE 

 NE 

 NE 



E 

 NE 



E 



3E 



E 

 ESE 



Min. 



30 

 30 

 40 

 40 

 40 

 50 

 50 

 35 



35 

 35 

 40 

 40 

 50 

 45 

 35 

 45 

 35 

 40 

 30 

 45 

 40 

 35 

 40 

 40 

 40 

 35 

 55 

 30 

 40 



No. 



No. 



No. 



24 



1 



2 



25 



12 



91 



1 



26 



113 



316 



52 



320 



2 



10 



1 



50 



23 



23 



15 



11 



4 

 50 

 11 



6 



19 



14 



12 



2 



7 

 81 

 11 

 59 



4 



31 



83 



46 



346 



2 



2 



44 



37 



22 



19 



3 



7 



1 



6 



22 



1 



3 



1 



3 



10 

 2 



3 

 2 

 6 

 3 

 4 

 7 



12 

 8 



17 



2 

 2 



14 

 10 

 4 

 8 

 1 

 6 

 1 

 2 

 14 

 2 

 1 



No. 



No. 



