×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

  • 28 January, 2024

  • 2 Min Read

Isopod 

An international team of marine biologists recently discovered a unique isopod, a form of crustacean, that has been formally identified as a new species of the genus Booralana.

  • Isopods are an order of invertebrates (animals without backbones) that belong to the greater crustacean group of animals, which includes crabs and shrimp.
  • Scientists estimate that there are around 10,000 species of isopods (all belonging to the order “Isopoda”).
  • They also live in many different types of habitats, from mountains and deserts to the deep sea, and they are distributed worldwide.
  • Features:
    • They are one of the most morphologically diverse of all the crustacean groups, coming in many different shapes and sizes and ranging from micrometers to a half-meter in length.
    • Isopods often do not look alike, but they do have common features. For example, all isopods have two pairs of antennae, compound eyes, and four sets of jaws.
    • The body of all isopods consists of seven segments, each with its own pair of walking legs.
    • Isopods have a short abdominal section composed of six segments, called “pleons,” and one or more of these segments is fused into a tail section.
    • Each pleon has a set of biramous (branching in two) limbs called “pleopods” that are used for swimming and respiration.
    • About half of the known species of isopods live in the ocean. Others live in coastal and shelf waters, moving around on the seafloor or living in plants.
    • Most are free-living, but a number of marine species are parasitic on other animals.

Crustaceans?

Crustaceans (make up a very large group of the Arthropods which include the crabs, lobsters, crayfish, shrimp, krill, barnacles, brine shrimp, copepods, ostracods and mantis shrimp. They are invertebrates with a hard exoskeleton (carapace), a segmented body that is bilaterally symmetrical, more than four pairs of jointed appendages. Crustaceans are found in a wide range of habitats - most are free-living freshwater or marine animals, but some are terrestrial (e.g. woodlice), some are parasitic (e.g. fish lice) and some do not move (e.g. barnacles)

Source:


Oceanic Anoxic Event 1a and MASS EXTINCTION

Oceanic Anoxic Event 1a from the Paris Basin (Environment) Paper-3 PMP OAE 1a refers to a period during the Cretaceous Period (145 million years ago and ended 66 million years ago) when Earth's oceans became depleted of oxygen, causing a significant disruption in marine life.  Cause: The event is believed to have been

Viksit Panchayat Karmayogi (Good governance)

Viksit Panchayat Karmayogi (Good governance) Governance GS PAPER-2 PMP Dr. Jitendra Singh launched the ‘Viksit Panchayat Karmayogi’ initiative on Good Governance Day, celebrated to mark the 100th birth anniversary of former Prime Minister Atal Bihari Vajpayee. The initiative, which is part of the broader ‘Prashasan Gaon

Major programmes to control Air Pollution

Major programmes to control Air Pollution National Clean Air Programme? It was launched by the Ministry of Environment, Forests and Climate Change (MoEFCC) in January 2019. It is the first-ever effort in the country to frame a national framework for air quality management with a time-bound reduction target. The

Air pollution and Air quality Measures in India

Air pollution and Air quality Measures in India (Environment) GS Paper-3 P-M-P Air pollution may be defined as the presence of any solid, liquid or gaseous substance including noise and radioactive radiation in the atmosphere in such concentration that may be directly and/or indirectly injurious to humans or other l

Geopolitical Significance of Ports

Geopolitical Significance of Ports (IR)  Act as geopolitical assets: Ports enhance the projection of strategic reach, which helps strengthen the country’s control over important sea and energy supply routes.  E.g. Indian Navy’s staging base at Agalega Islands will enable marine patrols

Toppers

Search By Date

Newsletter Subscription
SMS Alerts

Important Links

UPSC GS Mains Crash Course - RAW Prelims Answer Key 2024