{"id":5870,"date":"2026-03-04T10:18:05","date_gmt":"2026-03-04T02:18:05","guid":{"rendered":"https:\/\/transactions.nast.ph\/?p=5870"},"modified":"2026-03-28T17:20:50","modified_gmt":"2026-03-28T09:20:50","slug":"mass-culture-of-the-sea-urchin-tripnuests-gratilla","status":"publish","type":"post","link":"https:\/\/transactions.nast.ph\/?p=5870","title":{"rendered":"Mass Culture of the Sea Urchin Tripnuests gratilla"},"content":{"rendered":"\n<p class=\"has-text-align-center\">Marie Antonette Juinio-Me\u00f1ez and Rizza Marline B. Hapitan<br>Marine Science Institute, College of Science, University of the Philippines Diliman<\/p>\n\n\n\n<p class=\"has-text-align-center\"><a href=\"http:\/\/doi.org\/10.57043\/transnastphl.1998.5870\" data-type=\"link\" data-id=\"doi.org\/10.57043\/transnastphl.1998.5870\">doi.org\/10.57043\/transnastphl.1998.5870<\/a><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p><strong>Abstract<\/strong><\/p>\n\n\n\n<p>The sea urchin, Tripnuestes gratilla, is an important fishery resource. Its roe or gonad is a high value local and export product. Overexploitation has led to the decimation of viable spawning populations. This species has been cultured locally for the first time, through its entire life cycle, at the U.P. Marine Science Institute Bolinao Marine Laboratory. Laboratory experiments to determine optimal rearing and feeding regimes were conducted to improve the production of pre-settlement larvae and juveniles for grow-out culture and reseeding. Preliminary studies on the gonad yield of sea urchins in grow-out culture indicate considerable intra-annual and inter-annual variation in gonad weight to test diameter ratio. Likewise, young adults (6.0-6.4 em) in high stocking density cages had significant lower gonad yield than those in low stocking density cages. Development and further optimization of mass culture techniques provide an opportunity to utilize mariculture as a resource management tool in the form of sea pen\/cage grow-out culture which can enhance the recovery of depleted natural populations and at the same time provide a supplemental source of livelihood for fisherfolk.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<h5 class=\"wp-block-heading\">Keywords<\/h5>\n\n\n<div class=\"taxonomy-post_tag wp-block-post-terms\"><a href=\"https:\/\/transactions.nast.ph\/?tag=grow-out-culture\" rel=\"tag\">grow-out culture<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/transactions.nast.ph\/?tag=mariculture\" rel=\"tag\">mariculture<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/transactions.nast.ph\/?tag=sea-urchin\" rel=\"tag\">sea urchin<\/a><span class=\"wp-block-post-terms__separator\">, <\/span><a href=\"https:\/\/transactions.nast.ph\/?tag=tripnuestes-gratilla\" rel=\"tag\">Tripnuestes gratilla<\/a><\/div><\/div>\n<\/div>\n\n\n\n<div data-wp-interactive=\"core\/file\" class=\"wp-block-file\"><object data-wp-bind--hidden=\"!state.hasPdfPreview\"  class=\"wp-block-file__embed\" data=\"https:\/\/transactions.nast.ph\/wp-content\/uploads\/2026\/03\/TNP-1998-20_20_Mass-Culture-of-the-Sea-Urchin.pdf\" type=\"application\/pdf\" style=\"width:100%;height:1090px\" aria-label=\"Embed of TNP 1998 (20)_20_Mass Culture of the Sea Urchin.\"><\/object><a id=\"wp-block-file--media-33700242-7640-4c3f-b1ad-17901618d4b1\" href=\"https:\/\/transactions.nast.ph\/wp-content\/uploads\/2026\/03\/TNP-1998-20_20_Mass-Culture-of-the-Sea-Urchin.pdf\">TNP 1998 (20)_20_Mass Culture of the Sea Urchin<\/a><a href=\"https:\/\/transactions.nast.ph\/wp-content\/uploads\/2026\/03\/TNP-1998-20_20_Mass-Culture-of-the-Sea-Urchin.pdf\" class=\"wp-block-file__button wp-element-button\" download aria-describedby=\"wp-block-file--media-33700242-7640-4c3f-b1ad-17901618d4b1\">Download<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Marie Antonette Juinio-Me\u00f1ez and Rizza Marline B. Hapitan<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[831],"tags":[1035,118,1033,1034],"class_list":{"0":"post-5870","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-1998-technical-papers","7":"tag-grow-out-culture","8":"tag-mariculture","9":"tag-sea-urchin","10":"tag-tripnuestes-gratilla","11":"czr-hentry"},"_links":{"self":[{"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/posts\/5870"}],"collection":[{"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5870"}],"version-history":[{"count":2,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/posts\/5870\/revisions"}],"predecessor-version":[{"id":6140,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=\/wp\/v2\/posts\/5870\/revisions\/6140"}],"wp:attachment":[{"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5870"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5870"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/transactions.nast.ph\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5870"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}