{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T03:52:11Z","timestamp":1785210731453,"version":"3.55.0"},"reference-count":23,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2019,8,9]],"date-time":"2019-08-09T00:00:00Z","timestamp":1565308800000},"content-version":"unspecified","delay-in-days":8,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Zygote"],"published-print":{"date-parts":[[2019,8]]},"abstract":"<jats:title>Summary<\/jats:title><jats:p>This study aimed to describe the morphology and sperm quality of free-living adult males of cururu stingray<jats:italic>Potamotrygon wallacei<\/jats:italic>, endemic from the Rio Negro basin, Brazilian Amazon. The sperm was collected<jats:italic>in loco<\/jats:italic>from the seminal vesicle region and fixed in buffered saline formaldehyde solution for further evaluation of morphometry, sperm plasma membrane integrity and sperm concentration. The spermatozoa presented a total length of 138.25 \u00b1 1.82 \u03bcm with a helical shape and a long head. A high percentage of cells with intact membrane (98 \u00b1 2%) and normal spermatozoa (92 \u00b1 1%) were observed. The cell concentration was 0.34 \u00b1 0.05 \u00d7 10<jats:sup>10<\/jats:sup>spermatozoa\/ml of semen. These observations are unprecedented for potamotrygonid species and will serve as a basis for future management and conservation strategies.<\/jats:p>","DOI":"10.1017\/s096719941900039x","type":"journal-article","created":{"date-parts":[[2019,8,9]],"date-time":"2019-08-09T08:45:42Z","timestamp":1565340342000},"page":"259-261","source":"Crossref","is-referenced-by-count":14,"title":["Sperm characterization of the Amazonian freshwater cururu stingray<i>Potamotrygon wallacei<\/i>(Potamotryogonidae): basic knowledge for reproduction and conservation plans"],"prefix":"10.1017","volume":"27","author":[{"given":"Ruben Dario","family":"Morales-Gamba","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J\u00f4sie Schwartz","family":"Caldas","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leandro","family":"Godoy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5141-7816","authenticated-orcid":false,"given":"Jaydione Luiz","family":"Marcon","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2019,8,9]]},"reference":[{"key":"S096719941900039X_ref22","doi-asserted-by":"publisher","DOI":"10.1016\/j.theriogenology.2012.02.015"},{"key":"S096719941900039X_ref20","doi-asserted-by":"publisher","DOI":"10.1016\/S0022-5320(71)80091-6"},{"key":"S096719941900039X_ref15","doi-asserted-by":"publisher","DOI":"10.1017\/S0967199410000559"},{"key":"S096719941900039X_ref14","first-page":"110","article-title":"The flood pulse concept in river-floodplain systems","volume":"106","author":"Junk","year":"1989","journal-title":"Can J Fish Aquat Sci"},{"key":"S096719941900039X_ref13","first-page":"201","volume-title":"Reproductive Biology and Phylogeny of Chondrichthyes","author":"Jamieson","year":"2005"},{"key":"S096719941900039X_ref12","unstructured":"ICES (2013) Report of the workshop on Sexual Maturity Staging of Elasmobranchs (WKMSEL). ICES CM 2013\/ACOM:17. Available at: http:\/\/www.ices.dk\/sites\/pub\/Publication%20Reports\/Expert%20Group%20Report\/acom\/2013\/WGDEEP\/01%20WGDEEP%20%20Report%20of%20the%20Biology%20and%20Assessment%20of%20Deepsea%20Fisheries%20Resources%20Working%20Group.pdf"},{"key":"S096719941900039X_ref10","doi-asserted-by":"crossref","first-page":"398","DOI":"10.56021\/9780801860485","volume-title":"Sharks, Skates, and Rays: The Biology of Elasmobranch Fishes","author":"Hamlett","year":"1999"},{"key":"S096719941900039X_ref7","unstructured":"CITES (2016) Decisions of the Conference of the Parties to CITES in effect after its 17th meeting (CoP17 \u2013 Johannesburg, 2016). Available at: https:\/\/cites.org\/sites\/default\/files\/eng\/dec\/valid17\/E17-Dec.pdf."},{"key":"S096719941900039X_ref3","doi-asserted-by":"publisher","DOI":"10.1016\/j.ygcen.2009.02.011"},{"key":"S096719941900039X_ref2","first-page":"1","article-title":"Freshwater stingrays (Potamotrygonidae): status, conservation and challenges","volume":"8","author":"Ara\u00fajo","year":"2004","journal-title":"AC 20 Informative"},{"key":"S096719941900039X_ref1","unstructured":"Ara\u00fajo MLG (1998) Biologia reprodutiva e pesca de Potamotrygon sp. C (Chondrichthyes, Potamotrygonidae), no m\u00e9dio rio Negro, Amazonas. Master Tesis, Instituto Nacional de Pesquisas da Amaz\u00f4nia."},{"key":"S096719941900039X_ref17","doi-asserted-by":"publisher","DOI":"10.1016\/B978-0-12-372568-4.00003-3"},{"key":"S096719941900039X_ref6","doi-asserted-by":"publisher","DOI":"10.1007\/s10228-004-0262-2"},{"key":"S096719941900039X_ref21","first-page":"313","volume-title":"Advances in Spermatozoal Phylogeny and Taxonomy","author":"Tanaka","year":"1995"},{"key":"S096719941900039X_ref16","unstructured":"Morales-Gamba RD (2018) Perfil plasm\u00e1tico dos horm\u00f4nios esteroides e morfologia das g\u00f4nadas em machos e f\u00eameas adultas da arraia cururu Potamotrygon wallacei (Chondrichthyes \u2013 Potamotryogonidae) no per\u00edodo de enchente do m\u00e9dio Rio Negro. Masther Tesis. Universidade Nilton Lins\/Instituto Nacional de Pesquisas da Amaz\u00f4nia."},{"key":"S096719941900039X_ref5","doi-asserted-by":"publisher","DOI":"10.2960\/J.v35.m502"},{"key":"S096719941900039X_ref11","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2818.1956.tb00443.x"},{"key":"S096719941900039X_ref18","unstructured":"Ramos HAC (2017) Commercial species of freshwater stingrays in Brazil. Department of Sustainable Use of Biodiversity and Forests. Brazilian Institute of Environment and Renewable Resources (IBAMA). Ministry of Environment. 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