gam result

Dear all

for finding the relation between this variable i use gam ( in base of
non-normality)

[1] "temperature" "salinity"    "depth"       "Clupeidae"


model<-gam(Clupeidae~s(temperature)+s(salinity)+s(depth))


the result:

 Parametric coefficients:

                         Estimate        Std. Error       t value
    Pr(>|t|)

(Intercept)          0.40156        0.05467           7.345
2.12e-10 ***

Signif. codes:  0 ?***?    0.001 ?**?    0.01 ?*?  0.05 ?.? 0.1 ? ? 1



Approximate significance of smooth terms:

                               Edf        Ref.df         F           p-value

s(temperature)         4.321     5.326      1.470      0.207

s(salinity)               2.893      3.569      1.540       0.204

s(depth)                  1.000     1.000       0.015       0.903


R-sq.(adj) =    0.1       Deviance explained = 18.9%

GCV score = 0.28203       Scale est. = 0.25109        n = 84


this is my question;in base of R-sq.   or others parameters,is this
model robust ifor analyses?

also in others section this parameter is less than0.1


thanks all