Comparative sensitivity of sea urchin sperm bioassays to metals and pesticides
β Scribed by Paul A. Dinnel; Jeanne M. Link; Q. J. Stober; M. W. Letourneau; W. E. Roberts
- Book ID
- 105126129
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 842 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0090-4341
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## FOUR FIGURES Recent studies on the effect of ultraviolet radiations upon division rate of sea urchin eggs have demonstrated that less energy is needed at h2804A than at A2654A for equivalent retardation (Giese, '38a). The first wavelength is near the absorption maximum of cytoplasmic proteins (
## Abstract A variety of heavy metal chelating agents is known to prolong the fertilizing capacity and motility of sea urchin sperm. We report here that these agents maintain fertilizing capacity by preventing acrosome reactions which occur spontaneously after dilution of sperm into seawater. These
Bioassays were developed using sperm of a sea urchin (Echinometra mathaei), and sperm, embryos, and larvae of a bivalve species (Isognomon californicum). Sea urchin spawning was restricted to only a few months of the year and viability of sperm throughout the year varied from 5 to 75%. Sea urchin fe