Larva: Immature life stage of animals that undergo metamorphosis
Overview of larva, the immature life stage in animals undergoing metamorphosis; covers larval forms, feeding and growth, successive instars, examples (tadpoles, caterpillars, maggots) and dispersal mechanisms.
Many animals develop through distinct phases rather than growing directly into their adult form. A larva (plural: larvae) is the immature stage that emerges from the egg in some animals. The larval phase is separate from the sexually mature adult: larvae commonly have different shapes, structures and habits, and they usually transform into the adult body by a process known as metamorphosis. In many species there are several successive larval stages before the organism becomes an adult.
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Common examples
Larvae are found in a wide range of groups. Familiar examples include:
- Tadpoles — the larval form of many amphibians;
- Maggots — the larvae of flies;
- Caterpillars — the feeding stage of butterflies and moths.
During the larval period an animal often focuses on feeding and growth, and may moult several times between successive larval instars.
Marine larvae and dispersal
Many marine species release large numbers of eggs and sperms into the water, where fertilisation produces tiny larvae. A large proportion of marine invertebrates and a number of fish have either pelagic larvae or pelagic eggs. These forms live in the plankton for a period of time and can be carried by currents, which helps the species disperse over long distances before settling and completing metamorphosis.
See also
- Larvicide
Questions and answers
Q: What is a larva?
A: A larva is a separate life stage from the adult reproductive stage that develops from the egg in certain animals.
Q: Does a larva look like the adult animal?
A: No, it does not. A larva goes through metamorphosis and changes shape as it grows up.
Q: What are some examples of animals that have a larval stage?
A: Tadpoles, maggots, and caterpillars are some examples of animals that have a larval stage.
Q: How many larval stages can an animal go through before becoming an adult?
A: An animal can go through several larval stages before it reaches its adult form.
Q: What is the difference between the larval stage and the adult reproductive stage in animals?
A: The larval stage is a separate life stage from the adult reproductive stage, and the two stages look different and have distinct characteristics.
Q: What is the significance of releasing large numbers of eggs and sperms into the water column for marine organisms with a larval stage?
A: Marine organisms with a larval stage may release large numbers of eggs and sperms into the water column to increase their chances of fertilization and successful development.
Q: What is a pelagic larval stage or pelagic eggs?
A: A pelagic larval stage or pelagic eggs refer to the development of larvae in the plankton and their ability to be transported over long distances. It is a common characteristic of most marine invertebrates and many fish.
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Author
AlegsaOnline.com Larva: Immature life stage of animals that undergo metamorphosis Leandro Alegsa
URL: https://en.alegsaonline.com/art/56095