{"id":22027,"date":"2024-03-31T08:57:33","date_gmt":"2024-03-31T03:27:33","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=22027"},"modified":"2025-04-06T16:56:55","modified_gmt":"2025-04-06T11:26:55","slug":"fish-otolith","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/fish-otolith\/","title":{"rendered":"Fish Otolith"},"content":{"rendered":"<h2>About Fish Otolith<\/h2>\n<ul>\n<li>Otoliths are biomineralised ear stones that help fish hear and provide it a sense of balance<\/li>\n<li>These are important in fish studies as they have species-specific shapes and <strong>grow throughout their life.<\/strong><\/li>\n<li>They are commonly known as &#8220;earstones,&#8221; are hard, calcium carbonate structures located directly <strong>behind the brain of bony fishes.<\/strong>\u00a0<\/li>\n<li>There are <strong>three types of otoliths<\/strong>, all of which aid fish in balance and hearing:\n<ul>\n<li><strong>Sagitta:<\/strong> The largest of the 3 pairs of otoliths, sagitta is involved in the <strong>detection of sound<\/strong> and the <strong>process of hearing<\/strong>, or converting sound waves into electrical signals.<\/li>\n<li><strong>Asteriscus:<\/strong> This type of otolith is involved in the detection of sound and the process of hearing.<\/li>\n<li><strong>Lapillus:<\/strong> This type of otolith is involved in the detection of gravitational force and sound.<\/li>\n<\/ul>\n<\/li>\n<li>Different species have otoliths of different shapes and sizes; and cartilaginous fishes, such as sharks, skates, and rays, have none.\u00a0<\/li>\n<\/ul>\n<h2>Significance<\/h2>\n<ul>\n<li>These otoliths can be used to <strong>identify<\/strong> the species, <strong>size, age, growth rate, <\/strong>and season of death of an individual fish.<\/li>\n<li>Analysis of the oxygen isotope values of fish otoliths can provide information on the temperature of the water in which the fish lived.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1: What is Biomineralization?<\/h3>\n<p>It is the process by which living organism manufactures minerals for different functional purposes, such as mechanical stiffening of tissue, magnetic or gravitational sensing, and element storage.<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/epaper.thehindu.com\/reader?utm_source=Hindu&amp;utm_medium=Menu&amp;utm_campaign=Header\" target=\"_blank\" rel=\"nofollow noopener\"><u>Fish otolith ornaments make market debut<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fish otolith are biomineralised ear stones that help fish hear and provide it a sense of balance<\/p>\n","protected":false},"author":5,"featured_media":22028,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-22027","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/22027","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=22027"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/22027\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/22028"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=22027"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=22027"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=22027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}