TABLE 3. — Upper limit of carapace width range (mm) of 

 Cancer magister in Grays Harbor, Wash., for each age/sex 

 group. Selection method was cumulative probability (P) 

 or interpolation (I). The upper limit for age 2 + crabs 

 (lower limit of 3 + ) was not distinguishable in fall-winter 

 due to low numbers caught, nd = not distinguishable. 



5/4/80 



5/16/80 



6/4/80 



6/16/80 



6/21/80 



7/1/80 



7/15/80 



7/30/80 



8/14/80 



8/29/80 



9/12/80 



9/26/80 



10/13/80 



10/27/80 



11/12/80 



12/15/80 



1/17/81 



2/9/81 



3/11/81 



4/4/81 



4/21/81 



5/21/81 



7/1/81 



P 

 I 



P 

 I 



P 

 I 



P 

 I 



P 

 I 



I 



P 

 P 

 I 



P 

 P 

 P 

 I 



P 

 P 

 I 



P 

 P 



25 

 26 



27 

 29 

 30 

 32 

 34 

 37 

 40 

 43 

 45 

 46 

 46 

 46 

 46 

 46 

 44 

 44 

 45 

 47 

 15 

 26 

 29 



60 



65 



70 



70 



70 



75 



85 



88 



92 



92 



94 



96 



105 



106 



107 



101 



121 



121 



121 



120 



55 



70 



75 



115 

 120 

 124 

 132 

 136 

 136 

 136 

 134 

 132 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 127 

 nd 



P 

 I 



P 

 I 



P 

 I 



P 

 I 



P 

 I 

 I 



P 

 P 

 I 



P 

 P 

 P 

 P 

 P 

 P 

 I 



P 

 P 



30 

 28 

 25 

 27 

 28 

 31 

 37 

 36 

 36 

 41 

 45 

 50 

 50 

 52 

 54 

 52 

 55 

 54 

 61 

 56 

 15 

 29 

 29 



60 



69 



77 



79 



80 



87 



90 



91 



92 



93 



94 



95 



96 



98 



100 



104 



125 



126 



126 



133 



63 



75 



86 



120 

 124 

 127 

 126 

 126 

 127 

 130 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 nd 

 120 

 120 

 nd 



FISHERY BULLETIN: VOL. 82, NO. 3 



abundant at all stations except 3, averaging 268 

 crabs ha" 1 and 54.7% of all crabs over the entire 

 sampling period. Greatest densities occurred at 

 station 1, but these crabs were also abundant at 

 stations 3, 4, 5, and 7 (Fig. 5), i.e., the outer es- 

 tuary. This group was least abundant at stations 6, 

 8, and 9, but comprised the largest proportion 

 (73-78%) at the ring net stations (10-12). 



The average density of the 2+ age group was 121 

 crabs ha" * (stations 1-9) equal to 21.3% of all crabs 

 caught. Greatest densities occurred at stations 1 

 and 3 (Fig. 5). This group was the most abundant 

 at station 3, the only area where the 1 + age group 

 did not predominate. 



The 3+ age group was difficult to separate from 

 the 2+ group because the former were caught in 

 low numbers. Of all samples taken during the 

 study, they represented 3% with an average den- 

 sity of 17 crabs ha" l . This group occurred primarily 

 at stations 1-3, with greatest densities at station 1 



(Fig. 5). 



SITE 



1 1 



7£n 15.4 



12 3 4 



CRABS HECTARE" 1 x 100 





n 



12 p 



2 4 6 8 



CRABS PER RING NET 



10 



FIGURE 5.— Mean number of crabs per hectare (sites 1-9) and 

 crabs per ring net (sites 10-12) in Grays Harbor, Wash., over the 

 entire study period, by age group. 



Age 

 Class 



0+ 



1 + 



9.5 



I n i i i r-r-r 



2+ ESS^J 



^kss^^^S 



3 + 



A 



4 

 2 





 4 



2 





 4 



2 







f 2 

 



r10 

 8 

 6 

 4 

 2 

 



O 

 O 



o 



a> 

 a 



</> 



O 



123456789 

 Trawl Site 



FIGURE 6. — Actual density of crabs caught by trawl at sites 1-9 

 in Grays Harbor, Wash., June 1980, by age class. Sites 2, 5, and 7 

 sampled on 4 June; sites 1, 4, and 9 sampled on 16 June; sites 3, 6, 

 and 8 sampled on both dates and averaged. Note greatest abun- 

 dance of 0+ age group at site 5. 



476 



