Floating worm eggs?

Bruno Pernet pernetb at hotmail.com
Thu Feb 7 22:34:37 EST 2002

Hello all,

I’m working on a comparative study of egg energy provisioning in 
polychaetes, and am wondering about an esoteric but interesting topic that 
some of you can undoubtedly help me with.  Do any of you know of 
polychaetes that spawn positively buoyant eggs?  I know of only one 
reference to floating polychaete eggs – those of the syllid Typosyllis 
pulchra from the NE Pacific, described by Heacox (1980, Pacific Science 
34:245-258).  Stolons of this species spawned at the surface in his 
cultures, though, and it’s not clear to me that the eggs were actually 
positively buoyant – maybe they were just stuck in the surface tension.  Do 
other worms spawn positively buoyant eggs? I'd appreciate any insights.  

Thanks much,

Dr. Bruno Pernet
Friday Harbor Laboratories
University of Washington
620 University Road
Friday Harbor, WA 98250
tel 206 543 1484
fax 206 543 1273
email pernetb at hotmail.com

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