-40°35' 



40°25' 



Figure 3. — Bay study area where finfishes were sampled during an otter trawl survey, June 1974 to June 1975. 



obtained with expendable bathythermographs during 

 ocean cruises and with a portable temperature probe 

 during bay cruises. Surface water temperature was 

 measured at each station with a stem thermometer ac- 

 curate to ±0.1°C for calibration of the expendable bathy- 

 thermograph and the probe. Surface and bottom water 

 samples were taken at almost all stations for salinity 

 determination by induction salinometer. Fathometers 

 recorded depth during each trawl tow. 



Fish collections were made with otter trawls towed at 

 approximately 6.5 km/h for 15 min at bay stations and 30 

 min at ocean stations. The trawl used aboard Xiphias 

 and Rorqual had a 9.1-m footrope, a 7.6-m headrope, and 

 7.6-m legs, a Yankee #36 trawl with a 24.4-m footrope, an 

 18.3-m headrope, and 9.1-m legs was used on Delaware 

 II. The Albatross IV also used the #36 Yankee trawl as 

 well as a #41 trawl with a 30.5-m footrope, a 24.4-m head- 

 rope, and 19.8-m top and 18.3-m bottom legs. The At- 

 lantic Twin used a 3 4 Yankee trawl with a 16.5-m foot- 

 rope, an 11.9-m headrope, 11.6-m legs, and 16.5-m 

 ground cables. All trawls were fitted with 12.7-mm 

 stretch mesh cod end liners. 



At the conclusion of each tow, the trawl was retrieved 

 and emptied onto a sorting table where all fish species 

 were separated and identified. All specimens of each 

 species were weighed to the nearest whole pound and 

 measured from the snout to the middle caudal ray in cen- 

 timeters. All specimens of each species were usually 

 measured except when subsamples of very large catches 

 were measured. In such cases, an expansion factor 



(weight of total catch/weight of subsample) was applied 

 to the number and length frequency of the subsample to 

 estimate the number and length frequency of the total 

 catch. 



Samples of each bony fish species, up to 35 specimens, 

 were frozen from each trawl station for subsequent 

 laboratory study. If the total catch of a species exceeded 

 35 specimens, a size-stratified sample of 25 to 35 

 specimens was frozen. 



Sources of identification and nomenclature used were: 

 Jordan and Evermann (1896-1900), Hildebrand and 

 Schroeder (1928), Ginsburg (1937, 1950, 1951, 1952, 1953, 

 1954), Hildebrand (1943), Breder (1948), Bigelow and 

 Schroeder (1953), Berry and Anderson (1961), Casey 

 (1964), Eschmeyer (1965), Anderson et al. (1966), Green- 

 wood et al. (1966), Leim and Scott (1966), Gutherz 

 (1967), Bohlke and Chaplin (1968), Randall (1968), 

 Bailey et al. (1970), Rosenblatt and McCosker (1970), 

 and Marshall and Iwamoto (1973). 



DATA TABULATIONS 



During this study, 700 trawl stations were occupied in 

 13 mo. Stations were consecutively numbered to aid in 

 cross-referencing location, catch, and associated en- 

 vironmental data. Table 1 lists station numbers, vessel, 

 dates, number of stations, gear type, and study area for 

 each collecting interval. Table 2 provides station infor- 

 mation including date, coordinates to the nearest 0.2 km, 



