FISHERY BULLETIN: VOL. 82, NO. 3 



estuary with an extensive littoral zone and a wide 

 variety of substrate types (Fig. 1). Sampling sta- 

 tions were established primarily along the exist- 

 ing navigation channel in accord with a concur- 

 rent study to assess the impact of dredging on 

 Dungeness crabs (Armstrong et al. 1982). Habitats 

 represented include deeper sandy channels (sta- 

 tions 1-3), shallow sand (station 4), sand-mud (sta- 

 tions 6 and 7), mud (stations 8-12), and those adja- 

 cent to eelgrass (Zostera marina and Z. noltii) 



beds (station 5) (Table 1; Fig. 1). Fifteen sublittoral 

 strata were established for the purpose of estimat- 

 ing population abundance, and sampling stations 

 were located approximately at the center of each 

 (Fig. 1). However, strata 14 and 15 contained no 

 regularly sampled stations because these areas 

 were outside the primary focus of our contract. The 

 boundaries of each stratum were defined by the 

 midpoint between sampling stations, or the bot- 

 tom contours at -5.5 m or 0.0 m (for detailed 



50° N 



4 0° N 



3(T N — 



FIGURE 1. — A. West coast of North America. Arrow indicates site of Grays Harbor, Wash.; B. Map of Grays Harbor, showing sites of 

 Cancer magister collection (1-13). Stations 14 and 15 represent unsampled strata. Lines separating strata were defined arbitrarily for 

 use in determining crab population size. 



TABLE 1. — Location and description of sampling sites for Cancer magister in Grays Harbor, Wash. 



'T = otter trawl; RN = ring net. 



470 



