SEX RECOGNITION AND THE ROLE OF URINARY CUES IN THE LOBSTER, HOMARUS-AMERICANUS

Components of sex recognition by American lobsters, Homarus americanus , have been characterized by detailed study of videotaped recordings o f both intra- and intersexual interactions in temporarily blinded lobs ters. These analyses have permitted us to describe behaviors typically displayed by lobsters in agonistic intrasexual interactions in the ab sence of visual cues. The results suggest that sex recognition occurri ng over short distances may not rely on visual information. A method o f antennal gland cannulation was developed that allowed for continuous collection of voided urine from individual lobsters in paired interac tions away from contact with the seawater. Normal behavior patterns we re observed in all intra- and intersexual pairings of lobsters. Courts hip and mating also occurred when either or both intermolt male and po stmolt female were cannulated indicating that urine is not a source of factors required for lobster sex recognition.