(e) Unassociated school / sunamur a 7°° This type of school is discovered 

 by sighting the particular signs caused by the presence of the school 

 itselfo 



(5) Times when schools can be spotted with the greatest certainty 



With the fishing methods in use today it is impossible to fish after 

 the sun goes down. The time in which it is possible to fish is.limited to 

 the hours from dawn to dusk„ There has not yet been any concrete investi- 

 gation of the movements of skipjack schools during the night and so no 

 conclusions can he reached on that subject„ It is a peculiarity of the 

 skipjack that the schools become most active, and therefore most easily 

 discoverable, at dawn and at dusk ( asamazume , yuma zume ) „ Around sunrise 

 in particular is the best time. Since in general more fish are taken 

 during the forenoon, the particularly experienced old-timers should be 

 put on watch then. There are quite a few of these old-timers who have an 

 astonishing skill in finding schools by the smell of the water and other 

 special signs„ That is where the factor of individual skill comes into 

 play in this fishery. 



More catches are made in cloudy than in clear weather^ and when the 

 weather shows signs of changing, the chances of spotting schools are good,, 



(6) Clues to the discovery of schools which bite well 



Good-biting schools can be found more easily when the water is par- 

 ticularly clear and when the current is swift rather than slacko The 

 current in the open sea should be 5 ■= 6 knots and 7-8 knots near an 

 island. The effect of the stage of the tide is felt only near islands^ 

 Fish living on reefs come to the surface according to the strength of the 

 current. In general the fish bite best at and before and after high 

 and low water. The calmer the sea the more the fish come to the surface 

 and the more opportunities there are for sighting themo The time after a 

 period of low atmospheric pressure is also good, 



(7) Water temperatures and methods of discovering schools 



If the water temperature is not suitable, the schools will not 

 surface even though they may be present, and it is difficult to discover 

 them. Each region has its standard average water temperature for each 

 season; when higher than average temperatures are encountered, even though 

 they m-iybe above the range considered favorable for fishing, the boat 

 Trill change its course and seek suitable temperature Sc In areas where 

 water masses are mingled, with sharp variations in water temperatures 

 clearly indicating a meeting point of currents, many good-biting schools 

 can be sighted even though the temperatures are not in the range usually 

 considered suitable for fishingo 



3., The relationship between schools and the way they bite 



It is not an uncoirriion experience to sight a school only to find that 

 the fish cannot be caught because they will not come to the bait, but it is 



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