were made in an upstream or easterly 

 direction but trawling was undertaken 

 specifically during flood tide condi- 

 tions. During the two survey peri- 

 ods, October /November 1978 and May 

 1979, there were five trawJ sets and 

 five purse seine hauls made at each 

 site. An exception occurred at Jetty 

 A where hazardous wave action and 

 tidal currents prevented the purse 

 seine effort. 



Finfish were identified to spe- 

 cies, anesthetized, examined, mea- 

 sured in millimeters and weighed in 

 grams either' aboard the vessel or at 

 the Hammond Laboratory. In each sam- 

 ple up to 50 randomly selected indi- 

 viduals of each species were selected 

 for length/weight frequency measure- 

 ment and up to ten were sacrificed 

 for stomach content determination. 

 Decapod crustaceans such as crab and 

 shrimp were weighed and measured. 



Specimens retained for food- 

 utilization studies were injected 

 with Formalin (Reference to trade 

 names does not imply endorsement 

 by the National Marine Fisheries 

 Service, NOAA.) into the stomach 

 immediately after capture. The 

 stomach was later removed between 

 the esophagus and pyloric sphinct- 

 er, contents placed in 70 percent 

 alcohol and examined with a 10- 

 power microscope. Food items were 

 identified to the lowest possible 

 taxon, air dried, and weighed to 

 the nearest 0.0001 gm. 



Benthi c infauna, captured with 

 a 0.05-m Ponar sampler, were wash- 

 ed free ol sediments, retained on 

 a 0.595-mm sieve, and fixed in a 

 10 percent Formalin-rose bengal 

 stain solution. A series of 10 



samples taken at each of four 

 sites during both survey periods 

 resulted in 80 samples. All inver- 

 tebrates were identified, sorted 

 into groups, counted and weighed. 

 Similar groups were air dried for 

 10 minutes, weighed to the nearest 

 0.0001 gm and preserved in an al- 

 cohol-glycerin solution. 



Sediment samples were gathered 

 during each benthic invertebrate 

 survey. Ten substrate samples were 

 collected at each site during each 

 survey, for a total of 80 samples. 

 Temperatures and salinities were 

 taken on the bottom and surface at 

 each site and survey with a Beckman 

 RS5-3 salinometer. Sediment samples 

 were refrigerated and transferred to 

 a private analytical laboratory for 

 determination of particle texture 

 components and total volatile solids. 

 Particle-size categories followed 

 the Wentworth scale described by 

 Twenhofel and Tyler (1941) and 

 were listed in percentage weight 

 of the total sample. 



RESULTS 



FINFISH AND DECAPOD 



CRUSTACEAN EVALUATION 



The various species of fish 

 and decapod shellfish captured 

 during trawl and purse seine sam- 

 pling are presented in Table 1 . 

 The list includes 47 species with 

 37 appearing in trawl catches and 

 22 in purse seine catches. The fall 

 1978 trawling survey averaged 56.3 

 finfish and 78.5 shellfish per 

 minute of sampling effort whereas 

 the May 1979 survey yielded 

 considerably less with an average 

 7.5 finfish and 34.7 shellfish for 



439 



