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Traditional methods such as histology often require killing of fish, making them unsuitable for monitoring reproductive dynamics at fish level. This study evaluates ultrasonography as a non\u2010invasive tool for describing ovary size dynamics in European seabass (\n                    <jats:italic>Dicentrarchus labrax<\/jats:italic>\n                    ). We monitored 48 females fed with different feed amounts with ultrasounds along an entire reproductive cycle, to assess the effect of feed intake on ovarian development. The ovary volume estimated with ultrasounds has been found to be highly correlated with ovary weight (\n                    <jats:italic>r<\/jats:italic>\n                    <jats:sup>2<\/jats:sup>\n                    \u2009=\u20090.94,\n                    <jats:italic>n<\/jats:italic>\n                    \u2009=\u200936). The temporal dynamics of ovary size were modelled using a Bayesian approach, revealing relevant between\u2010individual variability in maximum ovary weight, timing and duration of ovarian development. Results indicate that individual, but not cage\u2010level, food intake significantly affects maximum ovary size [slope\u2009=\u200911.12 ovary g\/pellets per meal; 95% confidence interval (CI) between 5.29 and 16.81], although it has negligible effects on the date at which the maximum is reached and on the duration of the ovarian cycle. These findings evidence that ultrasonography can be used for an effective monitoring of ovary size dynamics in European seabass, providing real\u2010time insights for broodstock management with minimal harming to fish. Precise estimates of the maximum ovary size, the date in which this maximum is reached and the ovarian cycle duration may help to identify the best candidate females for covering farm larval demand at any moment, thus enhancing welfare and broodstock management efficiency.\n                  <\/jats:p>","DOI":"10.1111\/jfb.70406","type":"journal-article","created":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T23:35:39Z","timestamp":1776296139000},"page":"531-541","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Ultrasonography as a non\u2010invasive technique to assess the effects of diet on the ovaries of female European seabass (\n                    <i>Dicentrarchus labrax<\/i>\n                    )"],"prefix":"10.1111","volume":"109","author":[{"given":"Joaquim","family":"Tom\u00e0s\u2010Ferrer","sequence":"first","affiliation":[{"name":"LIMIA\u2010IRFAP, IRFAP, CAIB Unitat Associada al CSIC per l'IMEDEA  Port d'Andratx Spain"},{"name":"Institut Mediterrani d'Estudis Avan\u00e7ats (IMEDEA), UIB\u2010CSIC  Esporles Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Irene","family":"Moro\u2010Mart\u00ednez","sequence":"additional","affiliation":[{"name":"LIMIA\u2010IRFAP, IRFAP, CAIB Unitat Associada al CSIC per l'IMEDEA  Port d'Andratx Spain"},{"name":"Institut Mediterrani d'Estudis Avan\u00e7ats (IMEDEA), UIB\u2010CSIC  Esporles Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Enrique","family":"Massut\u00ed\u2010Pascual","sequence":"additional","affiliation":[{"name":"LIMIA\u2010IRFAP, IRFAP, CAIB Unitat Associada al CSIC per l'IMEDEA  Port d'Andratx Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Am\u00e0lia","family":"Grau","sequence":"additional","affiliation":[{"name":"LIMIA\u2010IRFAP, IRFAP, CAIB Unitat Associada al CSIC per l'IMEDEA  Port d'Andratx Spain"},{"name":"Institut d'Investigacions Agroambientals i d'Economia de l'Aigua (INAGEA), UIB\u2010INIA\u2010CAIB  Palma Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7875-3673","authenticated-orcid":false,"given":"Miquel","family":"Palmer","sequence":"additional","affiliation":[{"name":"Institut Mediterrani d'Estudis Avan\u00e7ats (IMEDEA), UIB\u2010CSIC  Esporles Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,4,15]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2109.2001.00570.x"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1006\/jfbi.2000.1237"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.3989\/scimar.2002.66n3273"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.1017\/S1751731113001493"},{"key":"e_1_2_10_6_1","doi-asserted-by":"publisher","DOI":"10.1016\/0044-8486(76)90117-4"},{"key":"e_1_2_10_7_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.applanim.2020.104963"},{"key":"e_1_2_10_8_1","volume-title":"Fish physiology","author":"Berlinsky D. 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