380 



Fishery Bulletin 98(2) 



Larval abundance at each station was taken into 

 account when calculating the contribution of each 

 genotype. The contribution for the entire sampling 

 area was estimated by the sum of the relative contri- 

 bution of each genotype at each station calculated by 

 the formula: 



TC = S{{Nn,,D[j' / n)x larval, abundance), 



where TC = the total contribution of a genotype to 

 the sampled larval population; 

 ^MDH' - ^^^ number of individuals of a genotype 

 at the MDH* locus for a given station; 

 and 

 n = the total number of individuals ana- 

 lyzed for MDH variation for a given 

 station. 



