Power Plant Entrainment: A Biological Assessment by J. R. Schubel

By J. R. Schubel

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Used Fig. S . The envelope of time-temperature exposure histories Schubel and Koo (1976) and Schubel et al. (1976). Koo e t a l . ) c o n tin u e d th e e x p e rim e n ts o f S c h u b e l They s u b je c te d a l e w i f e , A m e rica n sh a d , and and c o lle a g u e s . 0 and 14. 5 °C u s in g tim e - e x c e s s te m p e ra tu re e x p o su re h i s t o r i e s r e p o r te d by S c h u b e l (1974) and S c h u b e l e t a l . te m p e ra tu re s used by Koo e t a l . T a b le 3. ) (1 9 7 6 ).

2 °C above th e r e a r in g te m p e ra ­ F o r b a se te m p e ra tu re s o f 17 and 2 0 °C , and a ΔΤ o f 8 °C , no m o r t a l i t i e s w ere o b s e rv e d o v e r th e 6 h r p e r io d o f o b s e r v a t io n . A t a b a se te m p e ra tu re o f 25°C and a ΔΤ o f 8 °C , th e m o r t a l it y a t th e end o f 6 h r was 19%. A t a b a se te m p e ra tu re o f 30°C and a ΔΤ o f 8 °C th e m o r t a l it y a t th e end o f 6 h r was 11%, A t a ΔΤ o f 1 4 °C , 0% th e m o r t a l i t i e s w ere 3% (b ase te m p e ra tu re 2 0 °C ) , 100% 100% (b a se te m p e ra tu re 3 0 °C ) .

S t r ip e d b a ss la r v a e w ere th e m ost te m p e ra tu re t o l e r a n t o f th e th r e e s p e c ie s and c o u ld w ith s ta n d e x p o su re to e x c e s s te m p e ra tu re s o f up to 10°C 30 m in —th e lo n g e s t e x p o su re p e r io d t e s t e d — w it h no f o r up to s i g n i f i c a n t in c r e a s e in m o r t a l it y . The th e rm a l re s p o n s e p a t t e r n s o f th e o th e r two s p e c ie s w ere more c o m p lic a te d . Koo and h is c o lle a g u e s a r e c o n tin u in g e x p e rim e n ts w it h la r v a e o f th e s e same th re e s p e c ie s in an a tte m p t to r e s o lv e some o f th e a p p a re n t a n o m a lie s .

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