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Fertilization Success without Anterior Pleopods in Lysmata Wurdemanni (Decapoda: Caridea), a Protandric Simultaneous Hermaphrodite

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Abstract The modifications of the first two pleopods in male shrimp have long been considered to serve in insemination of the female. The role of pleopods 1 and 2 in mating in a protandric simultaneous hermaphroditic shrimp, Lysmata wurdemanni, were investigated. Results indicate that the modified endopod of pleopod 1 is not needed to transfer sperm in both male-phase (MP) and euhermaphrodite-phase (EP) shrimp. Absence of pleopod 2 does not affect the sperm-transfer success in both MP and EP shrimp. Removal of pleopod 1 also has no impact on fertilization in the MP shrimp; however, sperm transfer is affected by removal of pleopod 1 in some EP shrimp. Even when both pleopods 1 and 2 are completely ablated, about 20% of the shrimp can still fertilize successfully and another 20% partially successfully.

Affiliations: 1: (DZ, correspondence) Vero Beach Marine Laboratory, Florida Institute of Technology, 805 E. 46th Place, Vero Beach, Florida 32963, U.S.A. (; (JL) Department of Biological Sciences, Florida Institute of Technology, 150 University Boulevard, Melbourne, Florida 32901, U.S.A. (


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