{"id":943,"date":"2020-06-13T04:28:19","date_gmt":"2020-06-13T07:28:19","guid":{"rendered":"https:\/\/www.ufrgs.br\/ictio\/?p=943"},"modified":"2020-06-13T04:28:19","modified_gmt":"2020-06-13T07:28:19","slug":"zygoparity-in-characidae-the-first-case-of-internal-fertilization-in-the-teleost-cohort-otomorpha","status":"publish","type":"post","link":"https:\/\/www.ufrgs.br\/ictio\/2020\/06\/13\/zygoparity-in-characidae-the-first-case-of-internal-fertilization-in-the-teleost-cohort-otomorpha\/","title":{"rendered":"Zygoparity in Characidae – the first case of internal fertilization in the teleost cohort Otomorpha"},"content":{"rendered":"

Clayton Kunio Fukakusa , Talita Sarah Mazzoni and Luiz Roberto Malabarba<\/p>\n

RESUMO<\/strong><\/p>\n

A maioria dos tele\u00f3steos s\u00e3o esp\u00e9cies com fecunda\u00e7\u00e3o externa, sendo a fecunda\u00e7\u00e3o interna um evento relativamente raro. At\u00e9 o momento, Euteleosteomorpha \u00e9 a \u00fanica coorte de tele\u00f3steos conhecida com esp\u00e9cies de fecunda\u00e7\u00e3o interna. Na coorte de tele\u00f3steos Otomorpha, tem sido registrada a presen\u00e7a de esperma nos ov\u00e1rios de algumas esp\u00e9cies de Characiformes e Siluriformes, por\u00e9m nenhum ovo fecundado foi encontrado at\u00e9 agora no trato reprodutor feminino. Presume-se que os o\u00f3citos possam ser liberados na \u00e1gua associados aos espermatozoides e que somente l\u00e1 s\u00e3o fecundados, e o termo insemina\u00e7\u00e3o tem sido empregado para caracterizar a estrat\u00e9gia adotada por esses peixes. Apresentamos aqui a descoberta do primeiro caso de fecunda\u00e7\u00e3o interna na coorte de tele\u00f3steos Otomorpha, em\u00a0Compsura heterura<\/em>\u00a0(Characiformes: Characidae). Durante a desova, os ovos formam o espa\u00e7o perivitelino e os polos animal e vegetal dentro dos ov\u00e1rios, evidenciando a fecunda\u00e7\u00e3o interna. Os ovos rec\u00e9m-desovados continuam a forma\u00e7\u00e3o dos polos animal e vegetal e aumentam o espa\u00e7o perivitelino. Esses ovos est\u00e3o na fase zig\u00f3tica. Estes dados indicam que os ovos fertilizados s\u00e3o retidos por um curto per\u00edodo, fornecendo evid\u00eancias de que\u00a0C. heterura<\/em>\u00a0\u00e9 um peixe zig\u00f3paro.<\/p>\n

Link:\u00a0https:\/\/www.scielo.br\/scielo.php?script=sci_arttext&pid=S1679-62252020000100209&lng=en&nrm=iso&tlng=en<\/a><\/p>\n

\"\"<\/a>

Phylogeny of Teleostei (modified from Betancur-R et al., 2017), showing clades previously known to include species with internal fertilization (dark blue) and the present record in the teleost cohort Otomorpha (light blue). Remaining clades (black) do not contain internally fertilized species.<\/p><\/div>\n

 <\/p>\n

\"\"<\/a>

Oocyte and fertilized eggs of Compsura heterura. A. Unfertilized oocyte in ovary (follicle); B. fertilized egg in ovary (ovarian lumen) and C. gonoduct (Od); D. fertilized spawned egg. Yg, yolk granules; Ca, cortical alveoli; asterisk, chorion; Fe, follicular epithelium; N, nucleus; n, nucleoli; Y, yolk; Cc, cortical cytoplasm; Ps, perivitelline space; arrow, micropyle; Vp, vegetative poles; Ap, animal poles; In, intestine; M, muscle tissue.<\/p><\/div><\/p>","protected":false},"excerpt":{"rendered":"

Clayton Kunio Fukakusa , Talita Sarah Mazzoni and Luiz Roberto Malabarba RESUMO A maioria dos tele\u00f3steos s\u00e3o esp\u00e9cies com fecunda\u00e7\u00e3o externa, sendo a fecunda\u00e7\u00e3o interna um evento relativamente raro. At\u00e9 o momento, Euteleosteomorpha \u00e9 a \u00fanica coorte de tele\u00f3steos conhecida com esp\u00e9cies de fecunda\u00e7\u00e3o interna. Na coorte de tele\u00f3steos Otomorpha, tem sido registrada a presen\u00e7a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-943","post","type-post","status-publish","format-standard","hentry","category-sem-categoria"],"_links":{"self":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/comments?post=943"}],"version-history":[{"count":1,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/943\/revisions"}],"predecessor-version":[{"id":946,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/posts\/943\/revisions\/946"}],"wp:attachment":[{"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/media?parent=943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/categories?post=943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ufrgs.br\/ictio\/wp-json\/wp\/v2\/tags?post=943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}