Appetitive conditioning Chasmagnathus 4 Habituation 4 Invertebrates 4 Memory 4 animal experiment 4 article 4 controlled study 4 crab 4 male 4 nonhuman 4 reinforcement 4 Adrenergic alpha-Agonists 2 Aging 2 Animals 2 Association Learning 2 Aversive conditioning 2 Biogenic amine 2 Brachyura 2 CS-US interval 2 Chasmagnathus granulata 2 Chasmagnathus granulatus 2 Crab 2 Decapoda (Crustacea) 2 Male 2 Memory reconsolidation 2 Octopamine 2 Trace conditioning 2 adaptation 2 appetite 2