Yes, you are right. Dominatn specimens can kill inferior ones just by stressing them out. Also jewelled lacertas do prefer quite moist resting places and babies do dry out relatively easy.
Ohter they are among the fastest growing and most easy to raise Lacerta species.
Males can reach 20" in their first year and females can breed at 9 monhts.
But its better to feed more sparsely and let them grow more slowly. Aiming at first breeding with 18 months and 20" at the same age.

Ci@o

Ingo