Table 1.

DNA damage (CPDs per Mb of DNA) measured in natural populations of Antarctic marine macrozooplankton during depleted (October 1994–November 1994) and normal (December 1988) ozone conditions

Collection date	Phylum	Family	n*	CPDs per Mb, mean (SEM)	Percent with measurable damage
Oct./Nov. 1994†	Annelida	Alciopidae	2	4 (4)	50
	Chaetognatha	?	6	10.6 (5.8)	66.6
	Chordata	Channichthyidae-eggs	78	31.0 (9.9)	67.5
		larvae-anterior	35	35.1 (8.8)	80
		larvae-posterior	35	31.0 (8.7)	68.6
Dec. 1988‡	Chordata	Nototheniidae (larvae)	17	0 (0)	0

^*Genomic DNA samples were prepared from 2–4 eggs or from one larvae; n represents the number of DNA samples analyzed by radioimmunoassay. 

^†See Fig. 1 for collection areas. 

^‡Fish larvae were provided by Richard Radtke (University of Hawaii).