EDWARDS and KLEIBER: NONRANDOMNESS ON LINE TRANSECT ESTIMATES OF DOLPHINS 



REPLICATE SIMULATIONS 



STATIC DYNAMIC 



Simple, Gentle :(2, 1) 



mmm^r^i 



> 



CO 



z 



lU 



o 



_l 



o 

 o 



X 



o 



CO 



o 



LU 



I- 

 < 



I- 



co 



LU 



320 



600 



320 



Complex, Steep:(4, 5) 



TIME (hours 'lO) 



Figure 3. — Time course of total school abundance estimates derived from unstratified 

 TVOD. Estimates were derived during each of 600 time steps for 4 replicated runs of 8 

 different starting conditions. The cases differed in environmental topogi-aphy (simple, 

 gentle vs. comple.x, steep), in whether the topogi-aphy was static or dviiamic (sliding left 

 at 1 knot), and in underlying abundance of dolphin schools (1,250 or 2,500). Numbers in 

 parentheses (2. 1; 4, 5) are paiameters used in the equations generating the topog- 

 raphies. 



levels for each of three factors. The factors and 

 levels inchided 1) complexity of the environ- 

 mental topography (simple, with 4 gently sloping 

 peaks vs. complex, with 16 steeply sloping 



peaks), 2) topography dynamics (static vs. 

 moving at 1 knot) and 3) dolphin school abun- 

 dance (2,500 vs. 1,250 schools). Topography 

 movement was implemented by causing the grid 



865 



