FISHERY BULLETIN: VOL. 81, NO. 4 



Offshore Species 

 (xiS.D.) 



•♦$ 



o <3 3 'S o 



X (J15 N 



X 



B. Florida 



o 



X 



C. North Texas 



16- 



14- 



12 



10 



'• ""•■ 



d 15 N 



x 



vX^ 



-A13 



(5 13 C 



c^ 



d 34 S 



CX 



X 



10 



— i — 

 30 



20 30 40 



Wet Weight (g) 



50 



Figure 7. — Isotopic variations with size for migratory 

 penaeid shrimp in three regions of northern Gulf of 

 Mexico. All samples are composites of 5-25 in- 

 dividuals. Enlarged symbols at the right of each figure 

 give the mean and standard deviation for samples of 

 co-collected offshore resident shrimp. A, Brown 

 shrimp, May 1980, transect 1 (Fig. 1A). B, Pink 

 shrimp, October 1980, transect 10 (Fig. 1 A). (Symbols 

 for 5 34 S and 5"N of offshore residents lack error bars 

 because only one species was available for analysis). C, 

 Brown (smallest four samples) and white (largest two 

 samples) shrimp, October 1978, transect 5 (Fig. 

 1A). 



796 



