Role of the petasma and appendices masculinae during copulation and insemination in the penaeoid shrimp,Sicyonia dorsalis(Crustacea: Decapoda: Dendrobranchiata)
- 1 February 1996
- journal article
- research article
- Published by Taylor & Francis Ltd in Invertebrate Reproduction & Development
- Vol. 29 (3), 173-184
- https://doi.org/10.1080/07924259.1996.9672511
Abstract
The role of presumed male gonopods in the insemination of females was investigated in the penaeoid shrimp Sicyonia dorsalis. Males with partially ablated petasmata or with ablated appendices masculinae did not copulate with females, while control males with exopods removed from the third pleopods copulated frequently and successfully inseminated females. However, males with petasmata altered by blockages at the tip or at the base did copulate with females but were unable to inseminate them. The hypothesis that the petasma of Sicyonia is a sperm injection device is rejected. Evidence against this hypothesis includes the structure of the gonopods, the position of the male at right angles below the female during copulation, the brevity of copulation, the frequency of copulation during normal matings, and the ability of males to inseminate only the spermatheca on one side per successful copulation. It is hypothesized that the male uses the petasma, supported by the endopods of the second pleopods, to hook onto the female thelycum, adjusting position so that one erect genital papilla directly injects sperm mass into the aperture of one of the paired spermathecae. It is suggested that female selection on male petasma structure and use has resulted in the complex form of the petasma, rather than a purely mechanical selection for an efficient sperm injection device.Keywords
This publication has 14 references indexed in Scilit:
- Spermatophores and Plug Substance of the Marine Shrimp Trachypenaeus similis (Crustacea: Decapoda: Penaeidae): Formation in the Male Reproductive Tract and Disposition in the Inseminated FemaleThe Biological Bulletin, 1993
- Repetitive Copulation and Variable Success of Insemination in the Marine Shrimp Sicyonia dorsalis (Decapoda: Penaeoidea)Journal of Crustacean Biology, 1992
- COPULATORY COURTSHIP AND CRYPTIC FEMALE CHOICE IN INSECTSBiological Reviews, 1991
- Mating Behavior of the Grass Shrimp Palaemonetes Pugio Holthuis (Decapoda, Caridea)Journal of Crustacean Biology, 1984
- Observations of Spermatophores Attached To Pleopods of Preserved Male EuphausiidsCrustaceana, 1978
- Mating behaviour and spermatophore transfer in the shrimpHeptacarpus pictus(Stimpson) (Decapoda: Caridea: Hippolytidae)Journal of Natural History, 1976
- Mating in the BrachyuraCrustaceana, 1969
- Anatomy and histology of the male reproductive system of Callinectes sapidus RathbunJournal of Morphology, 1947
- Note biologiche sui PeneidiBolletino di zoologia, 1939
- Male organs for sperm-transfer in the cray-fish, Cambarus affinis: Their structure and useJournal of Morphology, 1911