Download Learnerz IAS app from the Play Store now! Download



Fish Otolith UPSC NOTE

 Why in news

  • Ornaments from fish otoliths, named ‘Sea gems’, have made a market debut.

  • Thanks to efforts of a group of enthusiastic fisherwomen in Vizhinjam.

  • Trained by scientists from Central Marine Fisheries Research Institute (CMFRI).

  • The otolith ornaments crafted by fisherwomen under self-help group Sea Gems Mahila Sahrudam Group recently went on display at Kerala Arts and Crafts Village showroom in Kovalam, Thiruvananthapuram.

  • Fish otoliths are biomineralised ear stones that help fish hear and provide it a sense of balance. Otoliths are important in fish studies as they have species-specific shapes and grow throughout their life.

What is Fish otolith

  • A fish otolith, also known as an earstone, is a hard structure made of calcium carbonate found inside the head of bony fish. 

  • It's located behind the brain and plays a vital role in two key senses for fish:

  1. Balance: Otoliths help fish maintain their balance and sense of orientation in the water.

  2. Hearing: They contribute to the hearing process by detecting vibrations and sound waves.

  • There are three pairs of otoliths in a fish, each with a slightly different shape and size

  • The largest and most commonly studied one for age determination is called the sagitta.

Here's an interesting fact about otoliths:

  • They grow throughout the fish's life in layers, similar to tree rings. 

  • By examining these layers under a microscope, scientists can estimate the age of the fish

  • The wider, translucent zones indicate periods of fast growth, while the thinner, opaque zones represent slower growth periods. 

  • This technique is a valuable tool for fisheries management and understanding fish populations.



Amritsar,1,April 2024,171,Art & Culture,1,August 2023,251,Courses,7,Daily Current Affairs,48,December 2023,189,Disaster Management,2,Environment and Ecology,54,February 2024,228,Foundation Course,1,GDP,1,GEMS Club,1,GEMS Plus,1,Geography,67,Govt Schemes,2,GST,1,History,2,Home,3,IAS Booklist,1,Important News,71,Indian Economy,46,Indian History,2,Indian Polity,56,International Organisation,12,International Relations,58,Invasive Plant,1,January 2024,240,July 2023,281,June 2022,6,June 2023,268,March 2024,238,May 2022,17,Mentorship,2,November 2023,169,October 2023,203,Places in News,2,Science & Technology,66,September 2023,205,UPSC CSE,111,
Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Fish Otolith UPSC NOTE
Fish Otolith UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS PREMIUM CONTENT IS LOCKED STEP 1: Share to a social network STEP 2: Click the link on your social network Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy Table of Content