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First report of intersex in the signal crayfish Pacifastacus leniusculus (Dana, 1852)

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The reproductive strategies of species of non-indigenous crayfish make an important issue in astacological research. Although crayfish reproduction has been well studied, there is little information available on the occurrence of intersexuality. We report the first evidence of intersex in the signal crayfish, Pacifastacus leniusculus (Dana, 1852). An intersexual specimen was found among five tested signal crayfish. Morphology revealed both male and female genital openings, as well as male gonopods. The specimen superficially appeared male but contained both testes and ovaries, with an atypical dispersed structure. Sperm was obtained from this crayfish. Histology showed both spermatocytes and oocytes. The gonadosomatic index (GSI = 3.79) was considered as a morphometric parameter of the intersexual crayfish. The ova present in the intersex male raised its GSI to the three-fold of that of normal males.

Affiliations: 1: University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zátiší 728/II, 389 25 Vodňany, Czech Republic


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1. Almeida A. O. , Buckup L. , 2000. "Occurrence of protandric hermaphroditism in a population of the neotropical freshwater crayfish Parastacus brasiliensis(Parastacidae)". Journal of Crustacean Biology, Vol 20: 224- 230.
2. Hajslova J. , Pulkrabova J. , Poustka J. , Cajka T. , Randak T. , 2007. "Brominated flame retardants and related chlorinated persistent organic pollutants in fish from river Elbe and its main tributary Vltava". Chemosphere, Vol 69: 1195- 1203.
3. Havelkova M. , Randak T. , Zlabek V. , Krijt J. , Kroupova H. , Pulkrabova J. , Svobodova Z. , 2007. "Biochemical markers for assessing aquatic contamination". Sensors, Vol 7: 2599- 2611.
4. Horwitz P. , 1988. "Secondary sexual characteristics of females of the freshwater crayfish genus Engaeus(Decapoda, Parastacidae)". Crustaceana, Vol 54: 25- 32.
5. Johnsen S. I. , Taugbol T. , 2010. Invasive Alien Species Fact Sheet Pacifastacus leniusculus. Online Database of the European Network on Invasive Alien Species (NOBANIS), available online at ( accessed 6 September 2013).
6. Lewis S. D. , 2002. " Pacifastacus ". In: Holdich D. M. (ed.), Biology of freshwater crayfish: 511- 540. ( Blackwell Science, Oxford).
7. Medley P. B. , Rouse D. B. , 1993. "Intersex Australian red claw crayfish ( Cherax quadricarinatus)". Journal of Shellfish Research, Vol 12: 93- 94.
8. Medley P. , Camus A. , Tiersch T. , Avault J. W. , 1994. Hermaphroditic Australian redclaw crayfish ( Cherax quadricarinatus). International Association Astacology, 10 thSymposium, p. 50 (abstract).
9. Niksirat H. , Kouba A. , Pšenicka M. , Kuklina I. , Kozák P. , 2013a. "Ultrastructure of spermatozoa from three genera of crayfish Orconectes, Procambarusand Astacus(Decapoda: Astacoidea): new findings and comparisons". Zoologischer Anzeiger, Vol 252: 226- 233.
10. Niksirat H. , Kouba A. , Rodina M. , Kozák P. , 2013b. "Comparative ultrastructure of the spermatozoa of three crayfish species: Austropotamobius torrentium, Pacifastacus leniusculus, and Astacus astacus(Decapoda: Astacidae)". Journal of Morphology, Vol 274: 750- 758.
11. Niksirat H. , Kouba A. , Kozák P. , 2014. "Post-mating morphological changes in the spermatozoon and spermatophore wall of the crayfish Astacus leptodactylus: insight into a non-motile spermatozoon". Animal Reproduction Science, Vol 149: 325- 334.
12. Noro C. K. , Lopez-Greco L. S. , Buckup L. , 2008. "Gonad morphology and type of sexuality in Parastacus defossus, a burrowing, intersexed crayfish from southern Brazil (Decapoda: Parastacidae)". Acta Zoologica (Stockholm), Vol 89: 59- 67.
13. Rudolph E. H. , 1995. "Partial protandric hermaphroditism in the burrowing crayfish Parastacus nicoleti(Philippi, 1882) (Decapoda, Parastacidae)". Journal of Crustacean Biology, Vol 15: 720- 732.
14. Rudolph E. H. , 1999. "Intersexuality in the freshwater crayfish Samastacus spinifrons(Philippi, 1882) (Decapoda, Parastacidae)". Crustaceana, Vol 72: 325- 337.
15. Rudolph E. H. , 2002. "New records of intersexuality in the freshwater crayfish Samastacus spinifrons(Decapoda, Parastacidae)". Journal of Crustacean Biology, Vol 22: 377- 389.
16. Rudolph E. , Almeida A. , 2000. "On the sexuality of South American Parastacidae (Crustacea, Parastacidae)". Invertebrate Reproduction and Development, Vol 37: 249- 257.
17. Rudolph E. , Crandall K. , 2005. "A new species of burrowing crayfish Virilastacus rucapihuelensis(Crustacea, Decapoda, Parastacidae) from southern Chile". Proceedings of the Biological Society of Washington, Vol 118: 765- 776.[765:ANSOBC]2.0.CO;2
18. Rudolph E. , Verdi A. , Tapia J. , 2001. "Intersexuality in the burrowing crayfish Parastacus varicosusFaxon, 1898 (Decapoda, Parastacidae)". Crustaceana, Vol 74: 27- 37.
19. Rudolph E. , Retamal F. A. , Martinez A. W. , 2007. "Partial protandric hermaphroditism in the burrowing crayfish Virilastacus rucapihuelensisRudolph and Crandall, 2005 (Decapoda, Parastacidae)". Journal of Crustacean Biology, Vol 27: 229- 241.
20. Sagi A. , Khalaila I. , Barki A. , Hulata G. , Karplus I. , 1996. "Intersex red claw crayfish Cherax quadricarinatus(von Martens): functional males with previtellogenic ovaries". Biological Bulletin, Vol 190: 16- 23.
21. Silva-Castiglioni D. , Lopez-Greco L. , Oliveira G. T. , Bond-Buckup G. , 2008. "Characterization of the sexual pattern of Parastacus variosus(Crustacea: Decapoda: Parastacidae)". Invertebrate Biology, Vol 127: 426- 432.
22. Sokol A. , 1988. "The Australian yabby". In: Holdich D. M. , Lowery R. S. (eds.), Freshwater crayfish: biology, management and exploitation: 401- 425. ( Croom-Helm, London).
23. Velisek J. , Kouba A. , Stara A. , 2013. "Acute toxicity of triazine pesticides to juvenile signal crayfish ( Pasifastacus leniusculus)". Neuoendocrinol. Lett., Vol 34( Suppl. 2): 31- 36.
24. Vogt V. , 2002. "Functional anatomy". In: Holdich D. M. (ed.), Biology of freshwater crayfish: 53- 151. ( Blackwell Science, Oxford).

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