amictic egg

biology

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June 18, 2026

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Amictic eggs are a biological concept related to the reproduction of rotifers, which are small freshwater animals. These eggs are produced by amictic females and develop without fertilization, a process known as parthenogenesis. This means that the amictic egg itself is incapable of being fertilized and will develop into a new female rotifer. This reproductive strategy is observed in many rotifer species, particularly those living in temporary environments like ponds and streams. The amictic females have a relatively short lifespan, typically no longer than two weeks. This contrasts with mictic eggs, which are produced later in the season and can either develop into males or, if fertilized, form dormant eggs that survive harsh conditions.123

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reproductive behaviour
Flatworms and rotifers
One egg type, called amictic, is produced in the early spring. These eggs apparently cannot be fertilized, and the embryo develops without fertilization (parthenogenesis); the result is females with a life-span no longer than two weeks. When the population reaches a peak in the early summer, a second type…
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One egg type, called amictic, is produced in the early spring. These eggs apparently cannot be fertilized, and the embryo develops without fertilization (parthenogenesis); the result is females with a life-span no longer than two weeks. When the population reaches a peak in the early summer, a second type…
Read More