Sperm Evolution In The Family Alestidae With Comparative Data For The Genus Chalceus (ostariophysi: Characiformes)

dc.creatorSantana J.C.O.
dc.creatorCalcagnotto D.
dc.creatorQuagio-Grassiotto I.
dc.date2014
dc.date2015-06-25T17:53:59Z
dc.date2015-11-26T14:28:48Z
dc.date2015-06-25T17:53:59Z
dc.date2015-11-26T14:28:48Z
dc.date.accessioned2018-03-28T21:32:01Z
dc.date.available2018-03-28T21:32:01Z
dc.identifier
dc.identifierNeotropical Ichthyology. Sociedade Brasileira De Ictiologia, v. 12, n. 2, p. 419 - 427, 2014.
dc.identifier16796225
dc.identifier10.1590/1982-0224-20130177
dc.identifierhttp://www.scopus.com/inward/record.url?eid=2-s2.0-84905120478&partnerID=40&md5=ca3191950c79d0d73bc3b3a7b43c98c6
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/86568
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/86568
dc.identifier2-s2.0-84905120478
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1246685
dc.descriptionSpermiogenesis and spermatozoa in six genera of the African family Alestidae plus the Neotropical genus Chalceus are described. Spermiogenesis is quite similar in all Alestidae and is identified as Type I and its variants. In Type I spermiogenesis, the flagellum of earliest spermatids lies lateral to the nucleus, and rotation of the nucleus towards the centriolar complex is observed. Nuclear rotation is complete reaching 90 degrees in Bryconalestes longipinnis, Brachypetersius altus, Brycinus imberi, B. lateralis, and Alestopetersius compressus; and is incomplete reaching 20 degrees in Micralestes acutidens and Rhabdalestes rhodesiensis. Spermatozoa morphology varies from a medial nucleus with fibrillar chromatin in the most basal genus Brycinus to a strongly eccentric nucleus with highly condensed chromatin in the more derived Rhabdalestes and Micralestes. Chalceus has a very similar spermatozoon to that found in Brycinus sharing the fibrillar aspect of the chromatin in the nucleus. This feature is so far only observed in these two genera among African and Neotropical characiform fishes. © 2014 Sociedade Brasileira de Ictiologia.
dc.description12
dc.description2
dc.description419
dc.description427
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dc.languageen
dc.publisherSociedade Brasileira de Ictiologia
dc.relationNeotropical Ichthyology
dc.rightsaberto
dc.sourceScopus
dc.titleSperm Evolution In The Family Alestidae With Comparative Data For The Genus Chalceus (ostariophysi: Characiformes)
dc.typeArtículos de revistas


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