Morphological Evidence for Protandric Simultaneous Hermaphroditism in the Caridean Exhippolysmata Oplophoroides
Open Access
- 1 January 2009
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Crustacean Biology
- Vol. 29 (1), 34-41
- https://doi.org/10.1651/08.3015.1
Abstract
This study analyzed and described the sexual system of Exhippolysmata oplophoroides through the study of primary and secondary sexual characters at macroscopic and microscopic levels, to address the question of the existence of gonochorism or hermaphroditism in this species. The shrimps were collected in the Ubatuba region, São Paulo, Brazil. A total of 487 individuals were examined, sexed, and measured. They were dissected and their gonads were fixed, sectioned, and stained. All individuals had ovotestes, oviducts, ejaculatory ducts, appendices masculinae, and gonopores on the coxae of the fifth pereiopods. Female gonopores were found only in shrimp above $$6.0\,\,{\text{mm}}$$ carapace length (CL). According to the characters studied, E. oplophoroides is a protandric simultaneous hermaphrodite with a male phase and a simultaneous hermaphrodite phase and these findings confirm some recent experimental evidence from mating pairs. The gonad of the male phase consisted of paired ovotestes with an undeveloped ovarian portion. In the hermaphroditic stage, most individuals had small appendices masculinae, both male and female gonopores, and ovotestes with vitellogenic oöcytes and spermatozoa. The present study is the first detailed morphological description of the sexual system of Exhippolysmata oplophoroides. Our results are discussed in the light of new findings.
Keywords
This publication has 31 references indexed in Scilit:
- Experimental confirmation of protandric simultaneous hermaphroditism in a Caridean shrimp outside of the genus LysmataJournal of the Marine Biological Association of the United Kingdom, 2008
- Minimization of precocious sexual phase change during culture of juvenile ornamental shrimps Lysmata seticaudata (Decapoda: Hippolytidae)Aquaculture, 2007
- TESTING THREE MODELS ON THE ADAPTIVE SIGNIFICANCE OF PROTANDRIC SIMULTANEOUS HERMAPHRODITISM IN A MARINE SHRIMPEvolution, 2006
- Same sexual system but variable sociobiology: evolution of protandric simultaneous hermaphroditism in Lysmata shrimpsIntegrative and Comparative Biology, 2006
- Insights on the female reproductive system in Hippolyte inermis (Decapoda, Caridea): is this species really hermaphroditic?Invertebrate Biology, 2005
- Population biology of spine shrimp Exhippolysmata oplophoroides (Holthuis) (Caridea, Hippolytidae) in a subtropical region, São Paulo, BrazilRevista Brasileira de Zoologia, 2005
- Mating systems in caridean shrimp (Decapoda: Caridea) and their evolutionary consequences for sexual dimorphism and reproductive biologyRevista chilena de historia natural, 2003
- Aspectos biológicos do camarão-espinho Exhippolysmata oplophoroides (Holthuis, 1948) (Crustacea, Caridea, Hippolytidae)Brazilian Journal of Biology, 1999
- Comparative Studies of Reproductive Behavior in Mantis Shrimps and Fiddler CrabsAmerican Zoologist, 1991
- The Genetical Evolution of Patterns of Sexuality: Darwinian FitnessThe American Naturalist, 1979