Home
Class 12
BIOLOGY
Introduction of Nile Perch in lake Victo...

Introduction of Nile Perch in lake Victoria of South Africa resulted in
(a) Excessive growith of water weeds
(b) Eliminations of water weeds
(c) Elimination of many species of cichild fish
(d) Excessive growth of cichild fish.

A

excessive growith of water weeds

B

eliminations of water weeds

C

elimination of many species of cichild fish

D

excessive growth of cichild fish.

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Context**: The question refers to the introduction of Nile Perch (scientific name: Lates niloticus) into Lake Victoria, which is located in East Africa, not South Africa. This introduction occurred in the late 1950s to early 1960s. 2. **Identifying the Impact of Nile Perch**: The Nile Perch was introduced as a means to boost fisheries, but it turned out to be an invasive species. Invasive species often disrupt local ecosystems by outcompeting native species for resources. 3. **Effects on Native Species**: The Nile Perch is a predator that feeds on the native cichlid fish, which are indigenous to Lake Victoria. There were approximately 200 species of cichlid fish in the lake before the introduction of Nile Perch. 4. **Consequences of Predation**: Due to the predatory nature of the Nile Perch, many species of cichlid fish have been eliminated from Lake Victoria. The introduction of this non-native species led to significant declines in cichlid populations, which are crucial for the local ecosystem and economy. 5. **Conclusion**: Based on the information gathered, the introduction of Nile Perch resulted in the elimination of many species of cichlid fish in Lake Victoria. Therefore, the correct answer is **(c) Elimination of many species of cichlid fish**. ---
Promotional Banner

Topper's Solved these Questions

  • BIODIVERSITY & CONSERVATION

    NCERT FINGERTIPS ENGLISH|Exercise HOTS|5 Videos
  • BIODIVERSITY & CONSERVATION

    NCERT FINGERTIPS ENGLISH|Exercise NCERT (EXEMPLAR PROBLEMS|20 Videos
  • BIOTECHNOLOGY - PRINCIPLES AND PROCESSES

    NCERT FINGERTIPS ENGLISH|Exercise Biotechnology - Principles And Processes|139 Videos

Similar Questions

Explore conceptually related problems

The elimination of around 200 species of cichlid fish from Lake Victoria of East Africa is an example of

Assertion : The Nile perch introduced into lake Victoria in east Africa led to the extinction of an ecologically unique assemblage of more than 200 species of cichlid fish in the lake. Reason : When alien species are introduced deliberately for economic or other uses, they often become invasive and cause extinction of indigenous species. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Consider the following six statements (a-e) about causes of biodiversity losses. a. Tropical rain forests once covering more than 14% of the earth's land surface, these forests now cover no more than 0.6%. b. Biological system should not be exploited beyond the degree of their renewability. c. Nile perch, a large predator fish was introduced into Lake Victoria of East Australia. d. Lantana is an indigenous plant of our country. e. Recent illegal introduction of the American catfish for aquaculture purpose is posing a threat to the indigenous catfishes in our rivers. Which of the above statement(s) is/are correct?

A white amorphous powder (A) when heated gives a colourless gas (B), which turns lime water milky and the residue (C) which is yellow when hot but white when cold. The residue (C) dissolves in dilute HCl and the resulting solution gives a white precipitate on addition of potassium ferrocyanide solution. (A) dissolves in dilute HCl with the evolution of a gas which is identical in all respects with (B). The solution of (A) as obtained above gives a white precipitate (D) on addition of excess of NH_(4)OH and on passing H_(2)S . Another portion of this solution gives initially a white precipitate (E) on addition of NaOH which dissolves in excess of it. Compounds (A) to (E) are identified as:

Select the species which are extincted due to over exploitation. Nile perch, water hyacinth, african catfish, passenger pigeon, lantana, cichild fish, steller's sea cow, quagga, dodo.

In a village in Karnatka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the waterbody was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.

Which pair is essential for the growth of fish in water? (a) Nitrates and sulphates (b) Sulphates and carbonates (c) Phosphates and carbonates (d) Calcium and phosphorus

Read the following statements carefully and find the incorrect statements: A. More than 1 percent impurities make domestic sewage unfit for human use. B. Less BOD causes mortality of fish and other aquatic creatures. C. Presence of large amounts of nutrients in water also causes excessive growth of planktonic algae, called an algal bloom. D. Algai bloom causes deterioration of the water quality an decreases fish mortality. E. Some bloom-forming algae are extremely toxic to human beings and animals. F. Eichhornia crassipies is the world's most problematic aquatic weed.

Find out correct statements - (A)Mammals, amphibia, freshwater fishes are ureotelic. (B) Waste product of bird and insect is same. (C) Fish eliminate ammonia through gill surfaces as NH_(4)^(+) (D) Uric acid is most toxic form and requires large amount of water for its elimination. (E) Excretory structures of most insects are malpighian tubules.

Which of the following fish led to the extinction of an ecologically unique assemblage of more than 200 species of cichild fish in the lake Victoria of E.Africa ? (a) Catla catla (b) Dog fish (c) Nile perch (d) African catfish

NCERT FINGERTIPS ENGLISH-BIODIVERSITY & CONSERVATION-Biodiversity & Conservation
  1. An exotic species that is introduced to a new area, spreads rapidly an...

    Text Solution

    |

  2. Which of the following fish led to the extinction of an ecologically u...

    Text Solution

    |

  3. Introduction of Nile Perch in lake Victoria of South Africa resulted i...

    Text Solution

    |

  4. The exotic species, which when introduced in India became notorious we...

    Text Solution

    |

  5. Which one of the following fish is being illegally introduced for aqua...

    Text Solution

    |

  6. Introduction of alien species into new area poses a threat to extincti...

    Text Solution

    |

  7. There are four major causes of accelerated rates of species extinction...

    Text Solution

    |

  8. Biodiversity loss occurs due to (i) habitat loss and fragmentation ...

    Text Solution

    |

  9. When a species becomes extinct, the plant and animal species associate...

    Text Solution

    |

  10. The reason behind conserving biodiversity have been grouped into which...

    Text Solution

    |

  11. Match column I with column II and select the correct option from the g...

    Text Solution

    |

  12. More than 25% of drugs are derived from plants. What kind of benefit d...

    Text Solution

    |

  13. is the exploration of molecular, genetic and species-level diversity f...

    Text Solution

    |

  14. Amazon rainforests are considered as 'lungs of the planet' as they con...

    Text Solution

    |

  15. The narrowly utilitarian arguments for biodiversity conservation inclu...

    Text Solution

    |

  16. Broadly utilitarian' argument for the conservation of biodiversity do...

    Text Solution

    |

  17. Waking up to a bulbul's song in the morning is related to (a) narrow...

    Text Solution

    |

  18. Read the given statements and select the correct option regarding this...

    Text Solution

    |

  19. Which of the following statements regarding the ethical argument for c...

    Text Solution

    |

  20. Ex situ conservation is used for the conservation of (a) all plants ...

    Text Solution

    |