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dc.contributor.authorTORATI, L. S.
dc.contributor.authorLOPES, J. T.
dc.contributor.authorLIMA, A. F.
dc.contributor.authorPUVANENDRAN, V.
dc.contributor.authorBATLOUNI, S. R.
dc.contributor.authorKIRSCHNIK, L. N. G.eng
dc.date.accessioned2024-01-17T11:32:32Z-
dc.date.available2024-01-17T11:32:32Z-
dc.date.created2024-01-17
dc.date.issued2024
dc.identifier.citationFishes, v. 9, 24, 2024.
dc.identifier.issn2410-3888eng
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1160896-
dc.descriptionThe pirarucu, Arapaima gigas, is an emblematic endangered Amazon osteoglossid with high potential for aquaculture development. In this study, we report the in vivo collection of semen from pirarucu for the first-time and a complete description of the spermatozoa ultrastructure using scanning and transmission electron microscopy (SEM and TEM). The spermatozoon of pirarucu is biflagellate with no acrosomal cell, comprising a spherical head (8.26 ± 2.19 μm2), a short intermediate piece region and two long flagella (68.34 ± 5.69 μm). The nucleus is spherical and electron-dense, and at its base, there are two nuclear fossae where the centrioles are found. The anterior part of the flagellum is positioned at the lateral base of the nucleus, forming an intermediate piece. Lateral to the intermediate piece, an abundant number of mitochondria are present and occupy most of the cytoplasmic volume. The two flagella were found with a 9 + 2 axonemal structure (nine peripheral doublets and two central microtubules). The central microtubules are aligned with two side fins formed laterally by the axoneme plasma membrane. Side fins were observed from the anterior region to the posterior end. The results show that the spermatozoa of A. gigas are biflagellate, mitochondria-rich and robust, corroborating the external fertilization characteristic of the species. The novel description of sperm morphology presented herein will contribute to advancing the knowledge of and aiding future research on the reproductive biology of this species.
dc.language.isoeng
dc.rightsopenAccess
dc.titleFeasibility of In Vivo semen collection and description of the morphology and ultrastructure of the spermatozoa of Arapaima gigas (Schinz, 1822).
dc.typeArtigo de periódico
dc.subject.thesagroPirarucu
dc.subject.thesagroPeixe
dc.subject.thesagroReprodução Animal
dc.subject.thesagroMorfologia Animal
dc.subject.thesagroEspermatozóide
dc.subject.nalthesaurusSpermatozoa
dc.subject.nalthesaurusOsteoglossidae
dc.subject.nalthesaurusArapaima gigas
dc.subject.nalthesaurusReproduction
dc.subject.nalthesaurusUltrastructure
riaa.ainfo.id1160896
riaa.ainfo.lastupdate2024-01-17
dc.identifier.doihttps://doi.org/10.3390/fishes9010024
dc.contributor.institutionLUCAS SIMON TORATI, CNPASAeng
dc.contributor.institutionJULIA T. LOPES, IFTO, Pedro Afonso-TOeng
dc.contributor.institutionADRIANA FERREIRA LIMA, CNPASAeng
dc.contributor.institutionVELMURUGU PUVANENDRAN, CENTER FOR MARINE AQUACULTURE & PRODUCTION BIOLOGY, Norwayeng
dc.contributor.institutionSERGIO R. BATLOUNI, UNESP, Jaboticabal-SPeng
dc.contributor.institutionLUCIANA NAKAGHI GANECO KIRSCHNIK, CNPASA.eng
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