External Fertilization Examples
Many aquatic species follow the external fertilization process. Some of them are:
External Fertilization in Sea Urchins
The external fertilization in sea urchins use chemotaxis to attract the sperm towards the eggs, their spawning is synchronized to prevent the eggs and sperms from drifting away.
External Fertilization in Frogs
The female frogs release the eggs into the water and the male releases the sperm in the water to fertilize them, the tadpole-larval stage of the frog lives in water and the adult frog lives on land.
External Fertilization in Coy Coral
These animals release a large number of gametes in water during spawning and after fertilization, the coral larvae move up to the surface of the water for maturation.
External Fertilization in Salmon
Salmon reproduces through external fertilization, where eggs and sperm are released into water simultaneously during spawning. The salmon fishes have an opening right in front of the anal fin from which the gametes are released and then they are fertilized.
External Fertilization in Starfish
These species use chemical signals to other members to inform that they are ready to spawn, this synchronizing method of spawning increases the chances of fertilization.
External Fertilization – An Overview
External fertilization occurs in fish, frogs, and certain invertebrates like sponges. External fertilization is the process of reproduction where the fusion of the male gamete and female gamete takes place outside the body in an external environment. This type of reproduction has various benefits as it has great biodiversity and the chances of survival are also higher. In this article, we will study the process of external fertilisation, examples, features and more.
Table of Content
- What is External Fertilization?
- Characteristics of External Fertilization
- External Fertilization Examples
- External Fertilization Process
- Advantages of External Fertilization
- Disadvantages of External Fertilization
- External Fertilization in Humans
- External Fertilization in Plants
- External Fertilization in Fish
- Difference Between Internal and External Fertilization
Contact Us