{"id":14719,"date":"2019-01-18T19:51:39","date_gmt":"2019-01-18T17:51:39","guid":{"rendered":"http:\/\/fishconsult.org\/?p=14719"},"modified":"2020-02-07T15:50:42","modified_gmt":"2020-02-07T13:50:42","slug":"grading-of-tilapia-fry-for-sex-reversal-process-video","status":"publish","type":"post","link":"https:\/\/fishconsult.org\/?p=14719","title":{"rendered":"Grading of tilapia fry for sex-reversal process &#8211; Video"},"content":{"rendered":"\n<p>Video credit: Charles Bernard Makuya       Description: Abdel Rahman El Gamal (Founder of the video channel) <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"312\" height=\"256\" data-attachment-id=\"14720\" data-permalink=\"https:\/\/fishconsult.org\/?attachment_id=14720\" data-orig-file=\"https:\/\/i0.wp.com\/fishconsult.org\/wp-content\/uploads\/2019\/01\/Grading-of-tilapia-fry-for-sex-reversal-process.png?fit=312%2C256&amp;ssl=1\" data-orig-size=\"312,256\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Grading of tilapia fry for sex reversal process\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/fishconsult.org\/wp-content\/uploads\/2019\/01\/Grading-of-tilapia-fry-for-sex-reversal-process.png?fit=312%2C256&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/fishconsult.org\/wp-content\/uploads\/2019\/01\/Grading-of-tilapia-fry-for-sex-reversal-process.png?resize=312%2C256\" alt=\"\" class=\"wp-image-14720\" srcset=\"https:\/\/i0.wp.com\/fishconsult.org\/wp-content\/uploads\/2019\/01\/Grading-of-tilapia-fry-for-sex-reversal-process.png?w=312&amp;ssl=1 312w, https:\/\/i0.wp.com\/fishconsult.org\/wp-content\/uploads\/2019\/01\/Grading-of-tilapia-fry-for-sex-reversal-process.png?resize=300%2C246&amp;ssl=1 300w\" sizes=\"auto, (max-width: 312px) 100vw, 312px\" \/><\/figure>\n\n\n\n<p>Because of\nthe superiority of tilapia males over females in regard to growth rate, several\nscenarios are adopted towards the culture of all-male tilapia. Whether the use\nof male hormone (17-alpha methyl testosterone) is permitted or banned, its use\nis widely practiced in the sex reversal process.<\/p>\n\n\n\n<p>In order for the hormonal treatment\nto be highly effective, the treated fry should be at a very young age and hence\nthe hormonal treatment covers the period of sexual un-differentiation that\nlasts 22 days for tilapia ending by all-male tilapia seeds that are targeted\nfor the use in farming operations.<\/p>\n\n\n\n<p>While controlled reproduction through\nthe collection and incubation of fertilized eggs allows knowing the age of\nhatched fry, and so the hormonal treatment is applied to known age of tilapia\nfry and so, if all elements of the sex reversal process are properly applied, a\nvery high ratio of produced males is expected.\n\nIn regard to the mass spawning that depends on\nthe collection of fry, the age of fry cannot guarantee to be the optimum.\nInstead, the size of fry is used to indicate its age. Based on the scientific\nfindings, the fry with a total length of 11-12 mm are suitable for the\nsex-reversal process. On the other hand, the effectiveness of the hormonal\ntreatment on larger sizes produces questionable results. In order to have the\noptimum results of the grading of collected tilapia fry, a grader with a 2.5 mm\nopening (mesh) is recommended; the passed fry undergoes the hormonal treatment while\nretained fry could be used in different farming systems.\n\n\n\n<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"750\" height=\"422\" src=\"https:\/\/www.youtube.com\/embed\/sAP3XTx0H80?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Video credit: Charles Bernard Makuya Description: Abdel Rahman El Gamal (Founder of the video channel) Because of the superiority of tilapia males over females in regard to growth rate, several scenarios are adopted towards the culture of all-male tilapia. Whether the use of male hormone (17-alpha methyl testosterone) is permitted or banned, its use is &hellip; <\/p>\n<p><a class=\"more-link btn\" href=\"https:\/\/fishconsult.org\/?p=14719\">Continue reading<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[359,5226,291,5225],"tags":[2413,7009,4685,6850,1162,6849,363],"class_list":["post-14719","post","type-post","status-publish","format-standard","hentry","category-aquaculture-and-artisanal-fishery-global-information-sharing","category-farmed-species-aquaculture-and-artisanal-fishery-global-information-sharing","category-gallery-2","category-tilapia-aquaculture-and-artisanal-fishery-global-information-sharing","tag-all-male-tilapia","tag-grading-tilapia-fry","tag-hormonal-treatment","tag-mass-spawning-of-tilapia","tag-sex-reversal","tag-sexual-un-differentiation","tag-tilapia","item-wrap"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1NIq6-3Pp","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"jetpack_likes_enabled":true,"_links":{"self":[{"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/posts\/14719","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/fishconsult.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14719"}],"version-history":[{"count":1,"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/posts\/14719\/revisions"}],"predecessor-version":[{"id":14721,"href":"https:\/\/fishconsult.org\/index.php?rest_route=\/wp\/v2\/posts\/14719\/revisions\/14721"}],"wp:attachment":[{"href":"https:\/\/fishconsult.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14719"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fishconsult.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14719"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fishconsult.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14719"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}