Agonistic Behavior of the Blue Crab, Callinect Us Sapid Us Rathbun

Agonistic Behavior of the Blue Crab, Callinect Us Sapid Us Rathbun AGONISTIC BEHAVIOR OF THE BLUE CRAB, CALLINECT US SAPID US RATHBUN by RICHARD L. JACHOWSKI 1) 2) (Department of Zoology, University of Maryland, College Park, Maryland, U.S.A.) (With 15 Figures) (Rec. 5-VI-1973) INTRODUCTION Specific patterns of aggressive and defensive behavior are known for a variety of brachyuran crabs, but there are few experimental investigations of the external and internal conditions that affect social activities. Several studies concern the behavioral significance of stimulus objects. VoN HAGEN (1961), for example, tested factors that induce waving of male fiddler crabs, Uca tangeri, by presenting them with various objects. Another study utilized artificial sand pyramids to test the responses of crabs, Ocypode saratan, that erect such structures themselves (LINSENMAIR, 1967). S?Ln2ow (1965) tested the role of acoustic stimuli in communication between fiddler crabs, U.pugilator. HazLE?rr (1972) used models to investigate visual stimuli that elicit agonistic responses in the spider crab, 3Iicrophr»s bicornutus. In addition, early studies of the brachyuran nervous system revealed that certain actions, including the defensive spreading of chelipeds, could be elicited as reflex-like responses to visual or tactile stimuli (BETHE, 1897). Members of the families Grapsidae and Ocypodidae have been most thoroughly studied, but some attention has been given Behaviour Brill

Agonistic Behavior of the Blue Crab, Callinect Us Sapid Us Rathbun

Behaviour , Volume 50 (3-4): 232 – Jan 1, 1974

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© 1974 Koninklijke Brill NV, Leiden, The Netherlands
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