Table 2. — Continued. 



Never fished* 



First quarter** Second quarter 

 not fished not fished 



Third quarter 

 not fished 



Fourth quarter 

 not fished 



05 °N 



- 



10°E 



25 °S 



- 



00° 



40' 



'S 



- 45' 



'W 



25 °N 



- 40°W 



00° 



- 



50°W 



25 °S 



- 



05 °E 



40" 



'S 



- 40' 



3 W 



25 °N 



- 35 °W 



20°S 



- 



00° 



30°S 



- 



45 °W 



40' 



>s 



- 35' 



'W 



20°N 



- 75°W 



25 °S 



- 



00° 



30°S 



- 



35 °W 



40' 



's 



- 30' 



J W 



20°N 



- 50°W 



30°S 



- 



30°W 



30°S 



- 



30°W 



40' 



's 



- 20' 



J w 



20°N 



- 40°W 



30°S 



- 



25 °W 



30°S 



- 



25 °W 



40' 



"s 



- 15' 



>W 



15°N 



- 95 °W 



30°S 



- 



00° 



30°S 



- 



20°W 



40' 



•s 



- 05' 



3 E 



15°N 



- 90°W 



30°S 



- 



20°E 



35 °S 



- 



50°W 











05 °N 



- 10°E 



35 °S 



- 



35 °W 



35 °S. 



- 



35 °W 











35 °S 



- 50°W 



35 °S 



- 



30°W 



35 °S 



- 



30°W 











40°S 



- 50°W 



35 °S 



- 



25 °W 



35 °S 



- 



25 °W 















35 °S 



- 



20°W 



35 °S 



- 



20°W 















35°S 



- 



10°W 



40°S 



- 



35 °W 















35 °S 



- 



05 °W 



40°S 



- 



30°W 















35°S 



- 



00° 



40°S 



- 



20°W 















40°S 



- 



45 °W 



40°S 



- 



15 °W 















40°S 



- 



20°W 



40°S 



- 



05 °E 















40°S 



- 



15 °W 





















40°S 



- 



05 °E 





















*These squares not included in listing by quarter. 

 **No fishing north of 40°N in this quarter. 



since we felt that with certain limitations 

 values in surrounding squares could be taken 

 as estimators. The four adjacent squares and 

 the four squares at the corners of each un- 

 fished square were considered. An unfished 

 square was filled if there were data in at 

 least: two adjacent squares, one adjacent 

 square and two opposing corner squares, or 



four corner squares. Adjacent squares were 

 assigned a weight of two, the corner squares 

 a weight of one. 



The catch per unit of effort of an unfished 

 square was calculated by multiplying values 

 in the adjoining squares by the appropriate 

 weighting factors, summing the products, 

 and dividing by the sum of the factors. The 



