FISHERY BULLETIN: VOL. 81. NO. 4 



SOUTH TEXAS 



6 13 C 



■15- 



13 



Brown shrimp 

 Oct. 1978 



-19 



17- 



6 13 c 



■15- 



13- 



-11 



—i 1 1 1 



10 20 30 L0 



Brown shrimp 

 May I 980 



Pink shrimp 

 Oct. I 978 t 



• • • 9 



B 



— i — i — i 



10 20 30 



x Brown shrimp 

 Oct. I 980 



6 13 c 



-21 



-19- 



17- 



•15 



-13- 



— i 1 1 1 1 



10 20 30 LO 50 



Pink shrimp 

 Oct. I 980 



x 

 x 



X 



/ 



X 

 X 



* 



-M — 



D 



* 9 



-i 1 1 1 



10 20 30 LO 



Spot 



May and 



Oct. I 980 



-11 



FLORIDA 



i i — i — i 



10 20 30 



1 r 



100 



Wet weight (g) 



FIGURE 3.— 8" C variation with size for collections made along the south Texas 

 coast (transects 1-4, Fig. 1 A). Symbol to the right of each figure indicates 1) 

 mean ( O ) of 5- 1 5 composite samples of benthic shrimps and stomatopods that 

 reside offshore, and 2) confidence limits (vertical bar) beyond which single 

 samples differ from the offshore mean at the 957c confidence level (Sokal and 

 Rohlf 1981). x = individual; • = composite sample. 



5 13 C 



17 



15 



13 



■11 





•. 



20 L0 



Wet weight (g) 



FIGURE 4.— 5"C variation of pink 

 shrimp with size for the October 

 1978, 1979, and 1980 collections in 

 the Tortugas fishing area, Florida 

 (transect 10, Fig. 1A). Symbols as 

 in Figure 3. 



792 



