Kim and Bang Simulation of walleye pollock distribution in Shelikof Strait 



309 



24 



23 



22 



2 1 



20 



1 8 



17 



„ 1.6 



% 1 5 



X 1 4 



g 13 



C 



I 12 



I 1 1 

 !^ 10 



TO 



I 09 

 08 

 07 

 06 

 05 

 04 

 03 

 02 

 



6 7 7 8 8-9 



Larval size (millimeters) 



11-12 



Figure 3 



Simulated larval abundance from the second 

 computer simulation using a revised mortality 

 rate of 0.070/day, and observed larval abundance 

 rn Table 3. Notice the difference in the simulated 

 abundances from the sampling area and the total 

 area. 



are calculated from oceanic current data, wind speed, 

 temperature distribution, or results of dye experiments 

 (Talbot 1974, Talbot 1977, Power and McCleave 1983, 

 Sundby 1983), even though they do not represent the 

 actual diffusion and advection of dispersing organisms. 

 The collection of diffusion coefficients and advection 

 rates from several sources is very important to under- 

 stand the characteristics of the oceanic situation. Aside 



from measuring the dispersion using inert tracers, the 

 use of plankton sampling data to derive these param- 

 eters has been limited because of the complexity of bio- 

 logical systems in the sea. The mobility and mortality of 

 larvae may bias in estimating such parameters. The em- 

 phasis of this paper is how biological sampling data can 

 be used for estimating physical properties, when the 

 swimming ability of the larvae is not significant. 



