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Table 4.

Summary of forward stepwise regression analysis of thread production by Mytilus edulis

Variable (Step)CoefficientStandard coefficientFPΔr2
Temperature (1) 0.15 0.366 13.56 0.014 0.59 
Hs (2) -6.55 0.549 11.34 0.020 0.18 
GI (3) 22.17 -0.500 6.86 0.047 0.13 
Constant 3.70     
Variable (Step)CoefficientStandard coefficientFPΔr2
Temperature (1) 0.15 0.366 13.56 0.014 0.59 
Hs (2) -6.55 0.549 11.34 0.020 0.18 
GI (3) 22.17 -0.500 6.86 0.047 0.13 
Constant 3.70     

The dependent variable was mean thread production rate in nine field assays. Condition index (CI) was not selected for entry as an independent variable because of colinearity with GI (gonadal index).

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