×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

  • 11 January, 2024

  • 3 Min Read

Elasmobranch Species

Shark & ray meat (elasmobranch meat) consumption no longer restricted to India’s tribal & coastal peoples.

  • Elasmobranch is a subclass of the Class Chondrichthyes: Cartilaginous Fishes, which consists of sharks, rays, skates, and chimaeras.

The rise in demand for elasmobranch meat could lead to more unsustainable fishing of shark species.

Difference - The other subclass of cartilaginous fish, the Holocephali, consists of Chimaeras, ratfish (Genus Chimaera) and elephantfish (Genus Callorhynchus).

  • The main differences between these two subclasses are the structure of their gills and how they grow in the embryo.
  • Holocephali has four-gill slits with a gill cover (an operculum); while Elasmobranchs have five to seven, external gill slits with no gill cover.
  • The term Elasmobranch actually means naked gill.
  • In addition, in the Holocephali the upper jaw is fused to the skull, unlike in the Elasmobranchii.

Features - A skeleton made of cartilage; No swim bladders; Five to seven pairs of gills opening individually to the exterior; Rigid dorsal fins; Rough skin made up of small dermal denticles.

  • Elasmobranch skin is made of tiny, hard, tooth-like placoid scales called denticles.
  • Elasmobranchs are renowned for their highly tuned senses, which make them incredibly successful in their environment.
  • Many Elasmobranchs can sense electrical impulses of other animals but not generate their own special fields, as they possess sensory organs called the Ampullae of Lorenzini.
  • Females have no obvious external reproductive structures, whilst males have two extensions of the pelvic fin known as claspers.

India has banned the live finning of sharks and the export of fins of all shark and ray species and ten species are completely protected from any fishing and trade.

Source: downtoearth


Pradhan Mantri Suryodaya Yojana

Recently, Prime Minister announced Pradhan Mantri Suryodaya Yojana under which 1 crore households will get rooftop solar power systems. India’s Status of Current Solar Capacity India currently stands at 4th place globally in solar power capacity. As per Ministry of New an

Foreign Contribution Regulation Act (FCRA)- NGO 

The Foreign Contribution Regulation Act, 2010 (FCRA) registration of two prominent non-governmental organisations (NGOs) — Centre for Policy Research (CPR) and World Vision India (WVI) have been cancelled this month. What is FCRA? Key provisions of FCRA, 2010 Key aspects Description

Voice clone-AI

Voice clone fraud has been on the rise in India. AI voice cloning – It is the process of creating a synthetic replica of a person’s voice through machine learning and speech synthesis technology.It is called as voice deepfakesor audio deepfakes. Objective – To achieve a high level of na

Science communication- how to promote

Steps taken by India to promote Science Communication Publications and Information Directorate (PID) - An organisation under Council of Science and Industrial Research (CSIR) established in 1951 for publishing and disseminating scientific information in India. National science magazines- The PI

Universal Basic Income (UBI)- Analysis

Universal Basic Income (UBI) can strengthen welfare architecture and unlock the nation’s latent demographic potential. UBI - It is an income support mechanism typically intended to reach all or a very large portion of the population regardless of their earnings or employment status. Objective- To provide enough to co

Toppers

Search By Date

Newsletter Subscription
SMS Alerts

Important Links