506 



BENNETT AND GOODYEAR 



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LENGTH, mm 



48 



Fig. 3 (a) Relationship between number of eyed embryos and 



length of Gamhusia affinis. , thermally affected samples. 



, unaffected samples, (b) Proportion of females reproducing as 



a function of length. Curve in part b is based on data from thermally 

 affected populations. 



The relationship between number of eyed embryos and body 

 length was not significantly different (t = 1.74, 103 df, a = 0.05) in 

 thermally affected and unaffected areas (Fig. 3a). These data indicate 

 that female mosquitofish from both areas had similar numbers of 

 eyed embryos per unit body length. 



The proportion of females reproducing in thermally affected 

 areas increased linearly (Y = -0.82 + 0.04X, r = 0.92) from 23 to 

 40 mm (Fig. 3b). An average of 65% of the females longer than 

 40 mm were reproductively active in the thermally affected areas. All 

 females collected from unaffected areas in June were reproductively 

 active. 



