MARCH 

 - I MALE = 2.i% 



_ 39 FEMALES. 97.5% 



h- 30 



z 



11125 

 U 



CK 

 111 20 



38 43 <B 53 58 43 68 73 78 93 



-I 1 < 1- 



T" 



"T r- 



T" 



APRIL 



17 MALES =11.9% 



126 FEMALES = 88.2 % 



1' 



5 





 35 ■ 

 30 

 25 



20 - 

 15 

 10 - 



1 I ; — I — I — r- 



T 1 1 1 — 



MAY 

 ■ 1 MALE = 2.6% 



38 FEMALES =97.3% 



JUNE 

 -0 MALES 

 -11 FEMALES =100.0% 



"1 I I 1 1 1 1 1 1 T- 



38 ■»3 48 53 58 63 68 73 73 83 



TOTAL LENGTH (MM.) 



33 ^° 43 ^.° 53 '? 63 "? 73 '^ 83 °.° 93 

 1 1 1 1 1 1 ' 1 1 1 '~ 



NOVEMBER 



1 MALE = 5.6% 



17 FEMALES = 94.6% 



' > 



/ 1 



-I — r 



DECEMBER 



3 MALES = 3,0% 



94 FEMALES = 96.9% 



T r- 



T^ 



-> r 



JANUARY 

 8 MALES = 22,3% 

 28 FEMALES = 77.9% 



°l 1 1 1 1 1 ' 1 1 1 1 1 T- 



33 38 43 48 53 58 63 68 '3 78 83 88 93 



TOTAL LENGTH (MM.) 



Figure 15. — Size distribution and sex ratios of Trachypeneus constrlctus on Georgia fishing grounds by month, January 



1933, March to June 1932, and November and December 1931. 



to 344 females taken above this range." My 

 small May 1935 sample from the South 

 Carolina shrimp grounds had 32 females 

 58 to 93 mm. long, with a mode at 63 nnm., 

 and 5 males fronn 43 to 53 mm. (3 were 

 53 mm.); and a sannple of 18 taken off South 

 Carolina in June 1935 contained all females 

 ranging from 73 to 83 mm., with a mode at 

 78 mm. 



Ovary development .-- Table 12 shows ovary 

 development in samples of JT. constrictus . 

 All females taken in Novennber had unde- 

 veloped ovaries. In January all females were 



undeveloped except for one with developing 

 ovaries. Ovary development was not recorded 

 for December, but I assume that nearly all 

 were undeveloped. For March 23.2 percent 

 were undeveloped, 30.6 percent developing, 

 38.5 percent yellow, and 7.7 percent ripe with 

 attached spermatophores. In April 11.2 per- 

 cent were undeveloped, 47.2 percent develop- 

 ing, 15.2 percent yellow, 15.2 percent ripe 

 without attached spernnatophores, and 11.2 

 percent ripe with attached spermatophores. 

 For May 68.5 percent were undeveloped, 21.0 

 percent developing, 7.9 percent yellow, and 

 2.6 percent ripe with attached spermatophores. 



15 



