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EXPLAIN THE LIFE CYCLE OF MOSQUITO

Asked by Nishant Jha(student) , on 24/1/13


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The life cycle of a mosquito consists of 4 distinct stages:

 


 

1) Egg:
Different species of mosquitos lay their eggs differently. For example: Culiseta species lay their eggs stuck together in rafts of up to 200 while Ades lay their eggs singly. Most of the eggs hatch within 48 hours and water is one of the most essential requirement for their survival.

2) Larva:
Eggs hatch into larvae which lives in the water but comes up to the surface of water for breathing. It grows further by shedding their skin for four times. They grow and become large when they shed their skin. They have siphon tubes which is used for the purpose of breathing and are hung upside down on the surface of water. They feed on the organic matter and microorganisms present in the water.

3) Pupa:
The larva on shedding their skin for the fourth time gets converted into pupa. This stage is often referred to as the resting and the non feeding stage of development. They are mobile and responds to certain changes in the environment and posses a tail which helps them to move to a protective area.

4) Adult:
The complete development of the pupa leads to the splitting of the skin of the pupa resulting in the formation of an adult mosquito. This stays on water for a short period of time hardening its body parts. Once it is completely dry and strong enough, it emerges out of water beginning a new life cycle.

Posted by Ritika Goyal(MeritNation Expert)on 27/1/13

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The mosquito goes through four separate and  distinct stages  of its life cycle and they are as follows: Egg, Larva, pupa, and adult. Each of these stages can be easily recognized by their special appearance. There are four common groups of mosquitoes living in the Bay Area. They are  Aedes , Anopheles, Culex, and Culiseta. 

Egg : Eggs are laid one at a time and they float on the surface of the water. In the case of Culex and Culiseta species, the eggs are stuck together in rafts of a hundred or more eggs. Anopheles and Aedes species do not make egg rafts but lay their eggs separately. Culex, Culiseta, and Anopheles lay their eggs on water while Aedes lay their eggs on damp soil that will be flooded by water. Most eggs hatch into larvae within 48 hours. 

Larva : The larva (larvae - plural) live in the water and come to the surface to breathe. They shed their skin four times growing larger after each molting. Most larvae have siphon tubes for breathing and hang from the water surface. Anopheles larvae do not have a siphon and they lay parallel to the water surface. The larva feed on micro-organisms and organic matter in the water. On the fourth molt the larva changes into a pupa.

Pupa: The pupal stage is a resting, non-feeding stage. This is the time the mosquito turns into an adult. It takes about two days before the adult is fully developed. When development is complete, the pupal skin splits and the mosquito emerges as an adult.

Adult: The newly emerged adult rests on the surface of the water for a short time to allow itself to dry and all its parts to harden. Also, the wings have to spread out and dry properly before it can fly.

The egg, larvae and pupae stages depend on temperature and  species characteristics as to how long it takes for development. For instance, Culex tarsalis might go through its life cycle in 14 days at 70 F and take only 10 days at 80 F. Also, some species have naturally adapted to go through their entire life cycle in as little as four days or as long as one month

Posted by Ishan Goyal(student)on 14/2/12

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Posted by Love Chocolates(student)on 14/2/12

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The mosquito goes through four separate and distinct stages of its life cycle and they are as follows: Egg, Larva, pupa, and adult. Each of these stages can be easily recognized by their special appearance. There are four common groups of mosquitoes living in the Bay Area. They are Aedes, Anopheles, Culex, and Culiseta.

Egg : Eggs are laid one at a time and they float on the surface of the water. In the case of Culex and Culiseta species, the eggs are stuck together in rafts of a hundred or more eggs. Anopheles and Aedes species do not make egg rafts but lay their eggs separately. Culex, Culiseta, and Anopheles lay their eggs on water while Aedes lay their eggs on damp soil that will be flooded by water. Most eggs hatch into larvae within 48 hours.

Larva : The larva (larvae - plural) live in the water and come to the surface to breathe. They shed their skin four times growing larger after each molting. Most larvae have siphon tubes for breathing and hang from the water surface. Anopheles larvae do not have a siphon and they lay parallel to the water surface. The larva feed on micro-organisms and organic matter in the water. On the fourth molt the larva changes into a pupa.

Pupa: The pupal stage is a resting, non-feeding stage. This is the time the mosquito turns into an adult. It takes about two days before the adult is fully developed. When development is complete, the pupal skin splits and the mosquito emerges as an adult.

Adult: The newly emerged adult rests on the surface of the water for a short time to allow itself to dry and all its parts to harden. Also, the wings have to spread out and dry properly before it can fly.

The egg, larvae and pupae stages depend on temperature and species characteristics as to how long it takes for development. For instance, Culex tarsalis might go through its life cycle in 14 days at 70 F and take only 10 days at 80 F. Also, some species have naturally adapted to go through their entire life cycle in as little as four days or as long as one month

Posted by Arathi Ramadasa...(student)on 31/5/12

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