FISHERY BULLETIN: VOL, 69, NO. 4 



 40 60 80 100 120 MO 160 180 200 



FORK LENGTH (AGE I) 



Figure 4. — Walford transformation of length in centi- 

 meters at age t + 1 against length at age ( for Atlantic 

 albacore. 



from his analysis of albacore growth. The 

 growth curve based on my calculations is shown 

 in Figure 5. 



AGE (YEARS) 

 Figure 5. — Growth curve for Atlantic albacore. 



LENGTH-WEIGHT 



De Jaeger (1963), de Jager, Nepgen, and 

 van Wyk (1963), van den Berg and Mat- 



thews (1969), and Nepgen (1970) published in- 

 formation on the length-weight relation of 

 Atlantic albacore. All gave separate equations 

 for males and females although de Jaeger (1963) 

 was unable to detect any significant differences 

 in his samples. I combined data from the long- 

 line fishery and the Bay of Biscay fishery and 

 calculated a length-weight equation for both 

 sexes combined since sex information was not 

 available for most of the samples at the smaller 

 sizes: 



W = 6.303 X 10-« X L328253 



Weight is in kilograms and length is fork length 

 in centimeters (Figure 6). 



Figure 6.- 



FORK LENGTH (CM) 



-Length-weight relation of Atlantic albacore, 

 both se.xes combined. 



SEX RATIO 



Five hundred ninety-eight albacore were 

 measured and sexed at canneries located in 

 Puerto Rico from December 1969 to September 



848 



