Table 3.

Effects of Early TCDD Exposure on F1 Generation Survival and Morphology

Group	Mortality	Total abnormalities	Edema	Skeletal abnormalities	Uninflated swim bladder
Control	5.2% ± 2.4	0.9±0.2%	0.7±0.2%	0.2±0.1%	0.8±0.3%
4 hpf	19.2% ± 4.8*	13.1±1.4%*	8.3±0.8%*	3.1±0.6%*	12.0±1.3%*
3 and 7 wpf	8.6% ± 4.3*	3.4±1.0%*	2.2±0.6%*	1.7±0.6%*	3.4±1.0%*

Note. Fish from the control and treated groups were spawned and eggs collected as described in the Materials and Methods section. Mortality was recorded daily, and fish were examined for the indicated malformations at 7 dpf. n = 30 spawns for each experimental group. Numbers indicate the average incidence and the SEM. The asterisk indicates significant difference (p < 0.05) from the control.