100 



Fishery Bulletin 90(1), 1992 



reliably scored. The Tpi-3(106) allele was observed in 

 California coastal samples and samples from the Eel 

 River. 



The newly discovered alleles, Ldh-1(800), Mpdh-2(78), 

 and Tpi-3(106), could be visualized only in their 

 homozygous form. If these alleles occur at low frequen- 



cies in samples of chinook salmon, they may not be 

 detected because of the low probabOity of sampling the 

 rare homozygote. This may account for the discon- 

 tinuous distribution observed for some of these alleles 

 (Appendix A). Consequently, Ldh-1(800) may be pres- 

 ent at low frequency in more than just four samples. 



