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Most of the quality attributes showed a seasonal variation strongly dependent on sea urchin sex. Maximum gonad yield (18%) was observed in March 2017. A single spawning event occurred between May and July. Gonads are rich sources of protein (12\u201318% WW) with low fat content (\u22646% WW), that increase during the gametogenic stages of recovery and growing (November-December). Polyunsaturated fatty acids were the dominant class in both sexes (4.2\u201314.7\u2009mg.g<jats:sup>\u22121<\/jats:sup> WW), being preferentially accumulated in females. Total gonads carotenoid varied seasonally, with the highest level being observed in males during spawning season. Echinenone was the main pigment present in gonads, showing highest concentrations in males during spawning and gonad recovering. During the growing and early maturation period gonads were more reddish, yellowish and brighter, as well as more firm, irrespectively of the sex. Based on all seasonal changes affecting gonad yield and quality, the period between November and February seems the most suitable to harvest high quality gonads in the Atlantic coast of Portugal.<\/jats:p>","DOI":"10.1038\/s41598-019-39912-w","type":"journal-article","created":{"date-parts":[[2019,2,28]],"date-time":"2019-02-28T11:05:03Z","timestamp":1551351903000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":55,"title":["The effect of sex, season and gametogenic cycle on gonad yield, biochemical composition and quality traits of Paracentrotus lividus along the North Atlantic coast of Portugal"],"prefix":"10.1038","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7531-9302","authenticated-orcid":false,"given":"Filipa","family":"Rocha","sequence":"first","affiliation":[]},{"given":"Lu\u00eds F.","family":"Bai\u00e3o","sequence":"additional","affiliation":[]},{"given":"Sara","family":"Moutinho","sequence":"additional","affiliation":[]},{"given":"Bruno","family":"Reis","sequence":"additional","affiliation":[]},{"given":"Ana","family":"Oliveira","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6925-3805","authenticated-orcid":false,"given":"Francisco","family":"Arenas","sequence":"additional","affiliation":[]},{"given":"Margarida R. 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