Table 21. — Chl-square analyses of total catch by kind of bait 

 and sea condition, John R. Mannlni^ cruise 14 (based 

 on data In table 32l 



cfiin be assumed that the silvery saixiine would be seen at a greater distance than 

 the colorless, nearly translucent squid at the depths fished by the longllne gear, 

 particularly when the sea causes the baits to move. 



The selection of sardines over herring was based solely on the necessity 

 of double hooking the latter to attain comparable catching efficiency. That double 

 hooking is unnecessary for sardines was shown in the single- vs. double-hooked 

 sardine experiment. The double-hooked sardines were retrieved in greater numbers 

 but did not have a higher catch than the single-hooked sardine baits. On the other 

 hand, one experiment on single- and double-booked herring showed a higher catch 

 with double-hooked baits. Further evidence of the superiority of the sardine was 

 shown in the sardine vs. herring experiment in which both baits were single hooked. 

 Relatively more sardines were retrieved when the seas were greater than force 2, 

 and at the same time the catch on sardines was higher. 



In the above discussion visibility and availability have been considered 

 to be the principal reasons for the superiority of sardines over squid and herring. 

 However, several peculiarities were noted in the results of the experiments. In 



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