RICHARDSON: PELAGIC EGGS AND LARVAE OF DEEPSEA SOLE 



ridge (Pearcy et al. 1977). These patterns have not 

 been investigated fully in the other species and 

 genera in the group although our limited E. 

 bathybius series indicates eye migration may 

 begin with notochord flexion. Larvae of G. 

 zachirus appear to maintain symmetry until they 

 are ready to settle and then transform rapidly, 

 w^hile asymmetry begins earlier and persists 

 longer in the pelagic phase in M. pacificus and 

 possibly the other genera. Perhaps the delay in eye 

 migration in Glyptocephalus is a specialization 

 associated with the prolonged pelagic period of all 

 species in this genus. 



ACKNOWLEDGMENTS 



The 16.2 mm larva was made available from W. 

 G. Pearcy's midwater trawl collections. Unpub- 

 lished data on incubation time of M. pacificus eggs 

 were compiled from experiments by Stephen Wil- 

 liams (formerly Oregon State University) and pro- 

 vided by Michael Hosie (Oregon Department of 

 Fish and Wildlife). Betsy B. Washington illus- 

 trated the egg and larvae. 



This work is a result of research sponsored by 

 the Oregon State University Sea Grant College 

 Program, supported by NOAA Office of Sea Grant, 

 Department of Commerce, under Grant No. 04-6- 

 158-44094. 



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