the summer recruitment by the continued low 

 level of nninimum sizes, but with the onset of 

 autunnn the nunnbers of adults decrease and 

 recruitment of young ceases. Except for oc- 

 casional individuals (inshore and offshore) no 

 P . aztecus are known to overwinter in North 

 Carolina waters." 



PINK SHRIMP 



I have records of pink shrimp only from a 

 series of hauls made off northeast Florida by the 

 Oregon between about lat. 28°00' and29°30' N. 

 and at 1 5 to 42 m. (8-23 fathoms) in July, Au- 

 gust, and September 1965 and 1966; and in 42 to 

 44 m. (23-24 fathoms) in December 1967. 



Size Distribution 



The size distribution data are limited but 

 do show that all sizes of pink shrimpoccurred 

 from about 15 to 42 m. (8-23 fathoms) during 

 the summer period, July-September (fig. 12). 



123 133 143 



1 I lie I 13fl I 138 J Ua I 158 I 166 I 178 | 186 | 198 i JOS | 

 I I I I I I I M I M I I I I I I I I I 



/\ 



\ 



JUIY- AUGUST 1965-66 

 BETWEEN tS AND IB METERS 

 (a TO 10 FATHOMS) 



35 MAIES =J5.5% 



42 fEMAlfS=S4.5% 



A-/' 



I ■ I ' I < I ■ I I I 



I ■ I 



T" 



AUGUST-SfPIEMBEH IV65-66 

 BETWEEN IB AND37 METERS . 

 (10 TO 20 FATHOMS) 



— 29 MALES =52.0%. 



27FEMAlES = 4e.0% 



I < I I I ■ I < 1 > I ■ I ' I 

 JUIY 1966 

 BETWEEN 37 AND 42 METEBS 

 (20 TO 23 FATHOMS) 



34 MALES '54.0% . 



29 FEMALES = 46.0% 



iJ... n_ v.... 



I I M I I I I I I I I I I I I I I I ' I 



0KEM8EII 1967 



<v BETWEEN 42 AND 44 MEIERS < 



(23 TO 24 FATHOMS) 



\ 46 MALES =44.2%. 



*l 58 FEMAL£S = 55.6% 



._ ' 118 ' 128 ' 138 148 ' 158 ' 16B ' 178 ' 188 ' 198 ' 208 ' 

 113 12i 133 143 153 163 173 183 193 203 213 



TOTAL LENGTH (MM.) 



Figure 12. — Size distribution and sex ratios of pink 

 shrimp off northeast Florida, between 15 and 42 m. 

 (8-23 fathoms), July to September, 1965-66; and between 

 42 and 44 m. (23-24 fathoms), December 1967. 



Pink shrimp taken in December in 42 to 44 m. 

 (23-24 fathonas) were of similar size to those 

 captured in July-September in 15 to 37 m. 

 (8-20 fathoms). 



Ovary Development 



Females taken in 15 to 18 m. (8-10 fathoms) 

 in July and August of 1965-66 were 2.4 percent 

 undeveloped, 85.6 percent developing, and 12.0 

 percent yellow; between 18 and 37 m. (10-20 

 fathoms) in August and September 1965-66, 

 7.4 percent were undeveloped, 63.0 percent 

 developing, and 29.6 percent yellow; and be- 

 tween 37 and 42 m. (20-23 fathoms) in July 

 1966, 13.8 percent were undeveloped, 82.7 

 percent developing, and 3.5 percent yellow 

 (table 8). No ripe ovaries were found. The 

 snnallest female with developing ovaries was 

 123 mm. long, and with yellow- stage ovaries, 

 148 mm. 



Ovaries of fennales in the December 1967 

 sample from 42 to 44 m. (23-24 fathoms) were 

 5.1 percent undeveloped, 83.0 percent develop- 

 ing, and 11.9 percent yellow (table 9). No ripe 

 shrimp were found. The smallest female with 

 developing ovaries was 138 mm., and with 

 yellow-stage ovaries, 153 nnm. The percentage 

 with yellow ovaries was smaller in the Decem- 

 ber 1967 sample than in the July to September 

 1965-66 samples. As no ripe females were 

 captured it is not possible to estimate time or 

 place of spawning. 



Joyce (1965), in discussing results of his 

 survey in northeast Florida, said for pink 

 shrimp with regard to ovary development, 

 "There was a total of 52 females taken off- 

 shore in the following stages of developnnent; 

 34 beginning development, 26 developing, and 

 2 developed. No ripe or spent P. duorarum 

 were taken." Since my sannples of pink shrimp, 

 which were from deeper water than Joyce's, 

 included a higher percentage of females with 

 yellow- stage ovaries, there is an indication 

 that as pink shrimp mature they move into 

 deeper water beyond the shallow coastal fish- 

 ing grounds. 



SEA BOB 



The sea bob -- a relatively small shrimp 

 as compared to white, brown, or pink 

 shrimps -- is of commercial importance in 

 the United States only in the Louisiana shrimp 

 fishery, where it makes up about 1 percent of 

 the catch. Williams (1965) gave the known 

 range of the species as Cape Hatteras, N.C., 

 south through the Gulf of Mexico and Caribbean 

 Sea to near Santos, Sao Paulo, Brazil. 



Records on sea bobs were taken only inter- 

 mittently, but those from the Georgia fishery 

 are sufficient to make a significant contribu- 

 tion. 1 have length frequency and ovary de- 

 velopment data for sea bobs from the Georgia 



10 



