{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,10]],"date-time":"2026-04-10T17:29:03Z","timestamp":1775842143417,"version":"3.50.1"},"reference-count":68,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2022,10,10]],"date-time":"2022-10-10T00:00:00Z","timestamp":1665360000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001664","name":"Leibniz-Gemeinschaft","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100001664","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal of Morphology"],"published-print":{"date-parts":[[2022,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Teleost fishes show an enormous diversity of parental care, ranging from no care to viviparity with maternal provisioning of embryos. External brooders carry their developing eggs attached to their bodies. This requires the formation of novel morphological structures to support attachment. The pelvic brooding ricefish\n                    <jats:italic>Oryzias eversi<\/jats:italic>\n                    evolved such a structure, called the \u201cplug.\u201d\u00a0The plug anchors attaching filaments from the fertilized eggs inside the female reproductive system, allowing the female to carry the embryos until hatching. Using histological sections and \u00b5\u2010computed tomography scanning, we show that the plug is formed by several types of interstitial cells, blood capillaries, and collagen fibrils that encapsulate the end of the attaching filaments in the anterior part of the gonoduct. Even 15 days after the loss of the protruding attaching filaments, the plug remains. In addition, the developed plug contains multinucleated giant cells that are derived from fusing macrophages. We thus hypothesize that the ricefish plug, which is vital for egg attachment in\n                    <jats:italic>O. eversi<\/jats:italic>\n                    , evolved due to an inflammatory reaction. We assume that it forms similar to a foreign body granuloma, as a reaction to irritation or injury of the gonoduct epithelium by the attaching filaments. Our study further corroborates that pelvic brooding entails a complex set of adaptations to prolonged egg\u2010carrying in the female reproductive system. During brooding, for instance, ovulation in the ovary is suppressed and the anterior part of the gonoduct is characterized by an intricate, recessed folding.\n                  <\/jats:p>","DOI":"10.1002\/jmor.21518","type":"journal-article","created":{"date-parts":[[2022,9,28]],"date-time":"2022-09-28T06:24:32Z","timestamp":1664346272000},"page":"1451-1463","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["How to stay attached\u2014Formation of the ricefish plug and changes of internal reproductive structures in the pelvic brooding ricefish,\n                    <i>Oryzias eversi<\/i>\n                    Herder et al.\u00a0(2012) (Beloniformes: Adrianichthyidae)"],"prefix":"10.1002","volume":"283","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7887-2915","authenticated-orcid":false,"given":"Alina","family":"Sch\u00fcller","sequence":"first","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Juliane","family":"Vehof","sequence":"additional","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Leon","family":"Hilgers","sequence":"additional","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn Germany"},{"name":"LOEWE\u2010Zentrum f\u00fcr Translationale Biodiversit\u00e4tsgenomik Frankfurt Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tobias","family":"Spanke","sequence":"additional","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn 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Institute for the Analysis of Biodiversity Change (LIB) Bonn Germany"},{"name":"Faculty of Fisheries and Marine Science Sam Ratulangi University Manado Indonesia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fabian","family":"Herder","sequence":"additional","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3279-7689","authenticated-orcid":false,"given":"Lynne R.","family":"Parenti","sequence":"additional","affiliation":[{"name":"Divison of Fishes, Department of Vertebrate Zoology, National Museum of Natural History Smithsonian Institution Washington District of Columbia USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Takashi","family":"Iwamatsu","sequence":"additional","affiliation":[{"name":"Department of Biology Aichi University of Education Karia City Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Julia","family":"Schwarzer","sequence":"additional","affiliation":[{"name":"Museum Koenig \u2013 Leibniz Institute for the Analysis of Biodiversity Change (LIB) Bonn 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