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Selfing and outcrossing in the brood protecting ophiuroid Amphipholis squamata
Poulin, E.; Féral, J.-P.; Florensa, M.; Cornudella, L.; Alvà, V. (1999). Selfing and outcrossing in the brood protecting ophiuroid Amphipholis squamata, in: Candia Carnevali, M.D. et al. (Ed.) Echinoderm Research 1998: Proceedings of the fifth European conference on echinoderms, Milan, Italy, 7-12 September 1998. pp. 147-150
In: Candia Carnevali, M.D.; Bonasoro, F. (Ed.) (1999). Echinoderm Research 1998: Proceedings of the fifth European conference on echinoderms, Milan, Italy, 7-12 September 1998. A.A. Balkema: Rotterdam. ISBN 90-5809-102-3. 580 pp., more

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Document type: Conference paper

Keywords
    Amphipholis squamata (Delle Chiaje, 1828) [WoRMS]; Marine

Authors  Top 
  • Poulin, E.
  • Féral, J.-P., more
  • Florensa, M.
  • Cornudella, L.
  • Alvà, V.

Abstract
    Amphipholis squamata is regarded as a cosmopolitan hermaphrodite ophiuroid present in all oceans except the polar areas. Paradoxically, the weak potential of dispersion related to the absence of a larval stage is associated with a very vast distribution area. Before investigating genetic structure, it was necessary to test the hypothesis of selfing. Indeed, in this species the testis and ovary, which open into the same pouch mature simultaneously. We have checked this assumption by means of paternity analyses on brooded individuals using RAPDs. Comparison of genetic fingerprints between brooded individuals and adults shows: (1) a variability between adult individuals, (2) a strong similarity between some incubated young and their carrying progenitor (confirmation of the existence of selfing) and (3) differences between some other brooded young and their carrying progenitor (co-existence of out-crossing).

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