Table 3 Yearly and area based results in the East, West, and South Sea during June and August in 1985, 1995, and 2002 for the egg density (log₁₀) by regular GAMs (Gaussian with identity) of the egg density. Location was composed of longitude and latitude for the station

R².(ad)

0.250

0.370

0.444

0.133

0.322

0.456

0.506

0.111

DE(%)

29.9

41.1

51.1

18.5

35.7

53.0

60.2

14.3

GCV scores

0.658

0.781

0.453

0.507

0.689

0.770

0.478

0.949

Covariates (p value)

  10 m depth

Temperature

Salinity

0.019*

DO

0.000***

  Difference between 10m and 50m

Temperature

0.000***

0017**

Salinity

0.003**

0.011*

DO

0.000***

0.045*

0.065’

0.071’

0.034*

  Feeding index

Zooplankton

0.048*

0.042*