FISHERY BULLETIN: VOL. 74, NO. 1 





0.5 



5 7.6 10 



15 20 25 



SALINITY (%.) 



30 35 



Figure l. — The effects of temperature and salinity on the percent viable hatch of winter flounder embryos. 



Table 2. — Mean percent total and viable ( ) hatch at the various temperature- 

 salinity combinations. 



Table 3. — Means and ranges for percent total and viable 

 hatches and mean abnormal hatches for each salinity at all 

 temperatures, and each temperature at all salinities. 



'Mean abnormal hatch 

 viable hatches. 



mean percent total hatches - mean percent 



no trend with temperature, but a high percentage 

 of abnormal larvae for salinities of lO'L and be- 

 low. Lowest percentages for abnormal larvae 

 were for salinities between 15 and 35%. The low 

 percentage for 40.0% reflects low hatching rates 

 and mortality during embryonic stages and does 

 not reflect values which can be compared with 

 salinities of 37.5%o and below. 



Analysis of variance performed on the survival 

 data indicate that salinity and temperature are 

 both significant factors (Table 4). Because of miss- 

 ing data (Table 1), it was not possible to test for 

 interaction between the two factors; however, by 

 examining the data, especially as it is expressed 

 in Figure 1, it is reasonable to conclude that an 

 interaction does occur. The multiple comparison 

 of means indicates significant differences be- 

 tween hatch means at various temperatures and 



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