Table 4.12 



Embryogenesis and Larval Developmental Effects in 

 Crassostria aiaas Exposed to Tributyltin Acetate. 



TOT Acetate 

 (ucr/1) rppm 



Effects on Reproduction 



100 

 50 

 25 

 10 



3-5 



0.5 



0.2 



0.1 



0.05 



0.02 



Inhibition of Fecundity 



Inhibition of Segmentation 



Partial Reduction of Segmentation 



Absence of the Formation of Trocophores 



Absence of Veligers - Malformation of 



Trocophores 



Abnormal Veligers - Malformation of 



Trocophores 



Numerous Anomalies - Total Mortality in 8 



days 



Perturbation in Pood Assimilation - Total 



Mortality after 12 days 



Normal D-Iarvae: Slow Growth, Almost 



Total Mortality after 12 days 



Slow Growth; High Mortality Rate After 10 



days 



No Observable Effect 



Sources: Alzieu, 1986, and His and Robert, 1985. 



IV-25 



