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Observations On Sound Production By Two Species of Crabs From Panama (Decapoda, Gecarcinidae and Pseudothelphusidae) 1)

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image of Crustaceana

Gecarcinus quadratus Saussure, 1853 (Gecarcinidae) und Potamocarcinus richmondi (Rathbun 1893) (Pseudothelphusidae) produzieren jeweils zwei verschiedene Typen von Geräuschen. Der erste Geräuschtyp ist ein sprudelnder ("bubbling'') Ton, der hervorgerufen wird durch Flüssigkeit, welche aus und über den 3. Maxillipeden hervorgebracht wird; der zweite Geräuschtyp ist ein zirpender Ton. Der zirpende Ton von G. quadratus wird ausgelöst durch Friktionen von Merus und Cheliped gegen die subhepatische Region des Karapax. Das zirpende Geräusch von P. richmondi entsteht durch Friktionen zwischen dem Propodus des zweiten Maxillipeden und dem Merus des dritten Maxillipeden.

Affiliations: 1: Smithsonian Tropical Research Institute, Balboa, Canal Zone


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