×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

GS-III :
  • 03 August, 2020

  • 2 Min Read

Density Dependent dispersals

Density Dependent dispersals

Context

  • Scientists at the Pune-based Indian Institute of Science Education and Research (IISER) carried out experiments to study the phenomenon of ‘density-dependent dispersal’ by observing around 29,000 fruit flies to see if evolution had modified their tendency to move towards or away from crowded regions.

Study findings:

  • While females had been dispersing more than the males initially, the males overtook females in movement after evolution.
  • This finding is perhaps the first evidence for an evolutionary reversal in the dispersal of the two sexes.

Significance:

  • The study of biological dispersal finds applications in epidemiology, conservation of biodiversity as well as control of agricultural pests.
  • ‘Density-dependent dispersal’ is central to our understanding of which life forms occur where.
  • Some species live in large groups while others are solitary.
  • Similarly, movement occurs away from a crowd in some species and towards it in some others. This pattern is termed as ‘density-dependent dispersal’.
  • The study highlights the need to frequently assess movement patterns of ecologically relevant species.

Source: TH


THE ABSURDITY OF THE ANTI-DEFECTION LAW

THE ABSURDITY OF THE ANTI-DEFECTION LAW Uddhav Thackeray’s government facing internal dissent from a block of 22 MLA led by Eknath Shinde, has brought the anti-defection law again into the spotlight. Such events were also witnessed in Puducherry, Madhya Pradesh, and Karnataka. ANTI-DEFECTION LAW The anti-defection law was included in

12TH WTO MINISTERIAL CONFERENCE

12TH WTO MINISTERIAL CONFERENCE The 12th Ministerial Conference of the World Trade Organization (WTO) concluded, recently in Geneva. The main areas of discussion were: WTO’s response to the pandemic.  Fisheries subsidies negotiations. Agriculture issues including Public Stockholding for Food Security. WTO Reforms and M

Bangladesh’s Rohingya Problem

Bangladesh’s Rohingya Problem What is the issue? The population of Rohingyas in Bangladesh as of now is 8,85,000 and the refugee population is increasing rapidly by 35,000 every year, which is a serious security implication for countries mainly in South Asia. What is the Rohingya issue? Rohingya are an

FINANCIAL ACTION TASK FORCE

FINANCIAL ACTION TASK FORCE  Pakistan got a respite from the Financial Action Task Force (FATF) as FATF announced that the country could be removed from the grey list. FATF is going to decide whether to take Pakistan off the ‘grey’ list at the end of its plenary session in Berlin in October. Pakistan has been on the Financia

The Situation of Government Jobs

The Situation of Government Jobs PM has ordered, million central government posts to be filled in a mission mode over the next one and a half years.  The Current Picture of Employment in India  The unemployment rate is defined as the percentage of unemployed persons in the labor force. Suffered by demonetization, pandemic,

Toppers

Search By Date

Newsletter Subscription
SMS Alerts