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Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria
Digitaria digitaria, a small astartid usually less than 10 mm in length, has a non-brooding behaviour in spite of its limited space for gonad development. This species lives in highly unstable environments with strong currents, which represent a challenge for fertilization and larval settlement. The...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387346/ https://www.ncbi.nlm.nih.gov/pubmed/32724126 http://dx.doi.org/10.1038/s41598-020-69457-2 |
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author | Marina, Pablo Urra, Javier Bueno, Juan de Dios Rueda, José Luis Gofas, Serge Salas, Carmen |
author_facet | Marina, Pablo Urra, Javier Bueno, Juan de Dios Rueda, José Luis Gofas, Serge Salas, Carmen |
author_sort | Marina, Pablo |
collection | PubMed |
description | Digitaria digitaria, a small astartid usually less than 10 mm in length, has a non-brooding behaviour in spite of its limited space for gonad development. This species lives in highly unstable environments with strong currents, which represent a challenge for fertilization and larval settlement. The studied population of D. digitaria from the Strait of Gibraltar area was dioecious, with significant predominance of females and sexual dimorphism, where females are larger than males. The reproductive cycle is asynchronous throughout the year, without a resting period, but with successive partial spawning events. The presence of stored sperm in the suprabranchial chamber and inside the gonad of some females, together with the release of eggs along the dorsal axis of both gills, points to internal oocyte fertilization. Bacteriocytes were found in the female and male follicle walls, but no bacteria were observed inside any of the gametes. Digitaria digitaria could represent a “missing link” between spermcast mating bivalves with brooded offspring and bivalves with broadcast release of eggs and sperm. The small size, limiting the oocyte production, together with the unstable environment could represent evolutionary pressures towards sperm uptake in D. digitaria. |
format | Online Article Text |
id | pubmed-7387346 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-73873462020-07-29 Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria Marina, Pablo Urra, Javier Bueno, Juan de Dios Rueda, José Luis Gofas, Serge Salas, Carmen Sci Rep Article Digitaria digitaria, a small astartid usually less than 10 mm in length, has a non-brooding behaviour in spite of its limited space for gonad development. This species lives in highly unstable environments with strong currents, which represent a challenge for fertilization and larval settlement. The studied population of D. digitaria from the Strait of Gibraltar area was dioecious, with significant predominance of females and sexual dimorphism, where females are larger than males. The reproductive cycle is asynchronous throughout the year, without a resting period, but with successive partial spawning events. The presence of stored sperm in the suprabranchial chamber and inside the gonad of some females, together with the release of eggs along the dorsal axis of both gills, points to internal oocyte fertilization. Bacteriocytes were found in the female and male follicle walls, but no bacteria were observed inside any of the gametes. Digitaria digitaria could represent a “missing link” between spermcast mating bivalves with brooded offspring and bivalves with broadcast release of eggs and sperm. The small size, limiting the oocyte production, together with the unstable environment could represent evolutionary pressures towards sperm uptake in D. digitaria. Nature Publishing Group UK 2020-07-28 /pmc/articles/PMC7387346/ /pubmed/32724126 http://dx.doi.org/10.1038/s41598-020-69457-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Marina, Pablo Urra, Javier Bueno, Juan de Dios Rueda, José Luis Gofas, Serge Salas, Carmen Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title | Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title_full | Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title_fullStr | Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title_full_unstemmed | Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title_short | Spermcast mating with release of zygotes in the small dioecious bivalve Digitaria digitaria |
title_sort | spermcast mating with release of zygotes in the small dioecious bivalve digitaria digitaria |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7387346/ https://www.ncbi.nlm.nih.gov/pubmed/32724126 http://dx.doi.org/10.1038/s41598-020-69457-2 |
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