TESTER and CAREY: INSTAR IDENTIFICATION OF SPIDER CRABS 



Cruise 1 

 April 1973 

 N=93 



Figure 7.— Size-frequency histograms representing 

 juveniles with carapace widths 10-50 mm wide. The 

 dashed line represents progression of instars through 

 time with instar IV in April, instar V in August and 

 instar VI in October through March. 



c 

 c 

 (0 



•4-+ 



CO 



CO 



o 



<0 



o 



c 

 o 



!E 

 O 



.Q 



E 



3 



Cruise 3 

 October 1973 

 N=143 



Cruise 4 

 November 1973 

 N= 102 



Carapace Width (mm) 



E 



E 



»-* 



X 

 h- 

 Q 



30 -r 



25 



20- 



15 



LU 



o 

 < 



tt 10- 



< 



o 



megalopoa 



«S9» 



n — i — i — i — i — i — i — i — i — i — i — | — i — i — i — i — r 



January January 



TIME (month) 



T 1 1 — I 1 — J 



January 



Figure 8.— Growth rate of Chionoecetes tanneri from egg to seventh instar is estimated to be 

 at least 20 mo. Dotted lines indicate standard deviation. 



979 



