{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T20:10:18Z","timestamp":1792267818838,"version":"4.4.0"},"reference-count":84,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2024,12,22]],"date-time":"2024-12-22T00:00:00Z","timestamp":1734825600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100003093","name":"Ministry of Higher Education, Malaysia","doi-asserted-by":"publisher","award":["FRGS\/1\/2020\/STG03\/UMT\/03\/2"],"award-info":[{"award-number":["FRGS\/1\/2020\/STG03\/UMT\/03\/2"]}],"id":[{"id":"10.13039\/501100003093","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["analyticalsciencejournals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Microscopy Res &amp; Technique"],"published-print":{"date-parts":[[2025,4]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>The Y\u2010organs (YOs) synthesize and secrete molting hormones, and thus regulate crustacean growth and reproduction. However, the YOs of the orange mud crab <jats:italic>Scylla olivacea<\/jats:italic> is yet to be described due to its minute size and ambiguous feature. This study describes the location, morphological characteristics, histology, and the changes of YOs at different molt stages, and examines in\u00a0vitro ecdysteroid secreted by the YOs of <jats:styled-content style=\"fixed-case\"><jats:italic>S. olivacea<\/jats:italic><\/jats:styled-content>. Mature male crabs (&gt;\u200990\u2009mm carapace width, CW) were used to identify the location of the YOs while male juveniles (50\u201365\u2009mm CW) at three molt stages (intermoult, premoult, postmoult) were dissected for the characterization of 20\u2010Hydroxyecdysone (20E) levels. The yellowish\u2010white, compact, and oval\u2010shaped YOs are located in pairs at the anterior cephalothorax region, beneath the mandibular external adductor muscle, anterior to the branchial chamber space, and around the end of the nerve tract. The YOs index and YO's cell diameter increased from postmoult to premoult; YO's diameter increased only during premoult stage. Under electron microscopy, the YO's surface morphology is rough, bumpy, network\u2010like, and porous, with several lacunar system tubules. High concentrations of haemolymph 20E during premoult correlated with the changes in the characteristics of YOs at this stage. The presence of ecdysteroid in YOs was confirmed by high performance liquid chromatography (HPLC). The characteristics of the YOs of <jats:styled-content style=\"fixed-case\"><jats:italic>S. olivacea<\/jats:italic><\/jats:styled-content> are similar to the YO descriptions of other brachyurans. The successful identification and characterization of YOs will spearhead future research on understanding its role in molt regulation of mud crabs, consequently contributing to the development and progress of crab culture and soft\u2010shell crab industries.<\/jats:p>","DOI":"10.1002\/jemt.24777","type":"journal-article","created":{"date-parts":[[2024,12,23]],"date-time":"2024-12-23T01:14:59Z","timestamp":1734916499000},"page":"1155-1166","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Identification and Characterization of the Y\u2010Organ of Orange Mud Crab <i>Scylla Olivacea<\/i>"],"prefix":"10.1002","volume":"88","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-1668-9503","authenticated-orcid":false,"given":"Muhammad","family":"Achdiat","sequence":"first","affiliation":[{"name":"Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries Universiti Malaysia Terengganu  Kuala Nerus Terengganu Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yushinta","family":"Fujaya","sequence":"additional","affiliation":[{"name":"Faculty of Marine Science and Fisheries Hasanuddin University  Makassar Indonesia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hanafiah","family":"Fazhan","sequence":"additional","affiliation":[{"name":"Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries Universiti Malaysia Terengganu  Kuala Nerus Terengganu Malaysia"},{"name":"Center for Chemical Biology Universiti Sains Malaysia  Bayan Lepas Penang Malaysia"},{"name":"Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity and Conservation, College of Marine Sciences Beibu Gulf University  Guangxi China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rusydi","family":"Rozaimi","sequence":"additional","affiliation":[{"name":"Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries Universiti Malaysia Terengganu  Kuala Nerus Terengganu Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. Sook","family":"Chung","sequence":"additional","affiliation":[{"name":"Institute of Marine and Environmental Technology University of Maryland Center for Environmental Science  Baltimore Maryland USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youji","family":"Wang","sequence":"additional","affiliation":[{"name":"International Research Center for Marine Biosciences, Ministry of Science and Technology Shanghai Ocean University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"KianAnn","family":"Tan","sequence":"additional","affiliation":[{"name":"Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity and Conservation, College of Marine Sciences Beibu Gulf University  Guangxi China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexander Chong","family":"Shu\u2010Chien","sequence":"additional","affiliation":[{"name":"Center for Chemical Biology Universiti Sains Malaysia  Bayan Lepas Penang Malaysia"},{"name":"School of Biological Sciences Universiti Sains Malaysia  Bayan Lepas Penang Malaysia"},{"name":"Northland Aquaculture Centre National Institute of Water and Atmospheric Research  Ruakaka New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M.","family":"Maulidiani","sequence":"additional","affiliation":[{"name":"Faculty of Science and Marine Environment Universiti Malaysia Terengganu  Kuala Nerus Terengganu Malaysia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2632-3612","authenticated-orcid":false,"given":"Khor","family":"Waiho","sequence":"additional","affiliation":[{"name":"Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries Universiti Malaysia Terengganu  Kuala Nerus Terengganu Malaysia"},{"name":"Center for Chemical Biology Universiti Sains Malaysia  Bayan Lepas Penang Malaysia"},{"name":"Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity and Conservation, College of Marine Sciences Beibu Gulf University  Guangxi China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2024,12,22]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/raq.12552"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1242\/jeb.093385"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cbpa.2016.03.018"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cbpb.2021.110678"},{"key":"e_1_2_9_6_1","first-page":"15","article-title":"Cytological Changes of Y Organ in Portunussanguinolentus (Herbst) During Moult Cycle and in de Eyestalked Crabs","volume":"55","author":"Babu B. 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