10 20 30 40 50 60 



■ : - ! V J -i " ,: 1 ' .:!.:!, 1 ',.:.:...^ ..,.'. 1 , l,.i u ,!■! illii.j L i LnL ,,,,!,, 



70 80 90 100 110 120 130 140 150 160 170 180 190 200 



Photo frame Number 



Figure 3. Distribution of sea pens along a submersible dive transect in Georges 

 Basin. The x- axis represents the photo frame number for a series of 200 

 random 35 mm color photographs taken over the dive. The y-axis is the 

 number of sea pens per photograph. Note the reduction in total numbers 

 of sea pens over the course of the dive as well as variation from photograph 

 to photograph. The area of sea floor per photograph is approximately 6.7 m 2 . 



40 



35 



30 - 



10 



o -* 



JSL Dive #1414 August 6, 1983 Georges Basin 

 ( 6.7 m 2 per photo frame ) 



J_ 



I I I I I I I I I I I I I I I I I I I I I I I I II 



2 4 6 8 10 12 1416 1820 22 24 2628 30 32 3436 38 40 42 44 46 48 50 52 54 



Sea Pens / Photograph 



Figure 4. Frequency distribution plot of the numbers of sea 

 pens per photograph for the same submehsible dive 

 shown in figure 3. 



126 



