Crustacea 2 Cycloheximide 2 Habituation 2 Learning 2 Massed and spaced training 2 Protein synthesis animal experiment 2 article 2 conditioning 2 controlled study 2 crab 2 cycloheximide 2 drug effect 2 habituation 2 learning 2 long term memory 2 male 2 memory consolidation 2 nonhuman 2 protein synthesis 2 training 2