How are fish fertilized?
There are various ways of fertilization in fish, and the fertilization process has its own characteristics according to different species and living environments. This article will introduce the fertilization method of fish in detail, and present you with a structured data report based on the hot topics and hot content on the Internet in the past 10 days.
1. Fertilization method of fish
The fertilization methods of fish are mainly divided intoin vitro fertilizationandinternal fertilizationTwo kinds. The following is a detailed comparison of the two methods:
| fertilization method | Features | Represent fish |
|---|---|---|
| in vitro fertilization | Female fish and male fish discharge eggs and sperm into the water respectively, and the fertilization process is completed in the water | carp, salmon, goldfish |
| internal fertilization | The male fish delivers sperm into the female fish through the copulatory organ, and the fertilization process is completed inside the female fish. | Sharks, rays, guppies |
2. Detailed process of in vitro fertilization
In vitro fertilization is how most fish are fertilized and the process is as follows:
1.lay eggs: Female fish lay eggs in a suitable environment, and the eggs are usually attached to aquatic plants or rocks.
2.ejaculation: The male fish follows closely behind and releases the sperm near the egg.
3.fertilization: Sperm and eggs combine in water to form a fertilized egg.
4.hatch: The fertilized eggs hatch over a period of time and eventually develop into juvenile fish.
3. Detailed process of internal fertilization
Internal fertilization is more common in cartilaginous fish and some special bony fish. The process is as follows:
1.Mating: The male fish delivers sperm into the female fish through its mating apparatus (such as fins and feet).
2.fertilization: Sperm and eggs combine in the female fish body to form fertilized eggs.
3.development: The fertilized eggs develop inside or outside the female fish, and some species will directly give birth to juvenile fish.
4. The relationship between hot topics on the Internet in the past 10 days and fish fertilization
The following are hot topics and hot content related to fish fertilization on the Internet in the past 10 days:
| hot topics | Related content | heat index |
|---|---|---|
| Marine ecological protection | Discuss the impact of fish reproduction on marine ecology | ★★★★☆ |
| aquaculture technology | Application of artificial insemination technology in breeding industry | ★★★★★ |
| Endangered fish protection | How to save endangered species through artificial insemination | ★★★☆☆ |
5. Progress in scientific research on fish fertilization
In recent years, scientists have made a number of important advances in the field of fish fertilization:
1.artificial insemination technology: Sperm and eggs are extracted by artificial means to improve the fertilization rate and are widely used in aquaculture.
2.gene editing: Use CRISPR technology to improve fish genes to improve reproductive capacity and disease resistance.
3.environmental factors: Study the effects of environmental factors such as water temperature and water quality on the fertilization rate of fish.
6. Interesting facts about fish fertilization
1.carp: Female carps can lay hundreds of thousands of eggs at a time, but only a handful can be successfully fertilized and hatched.
2.seahorse: The male seahorse is responsible for gestating offspring. The female lays eggs in the male’s pouch, and the male completes fertilization.
3.Guppy: A representative of internal fertilization, the male fish sends sperm into the female fish through the mating organ, and the female fish can store the sperm for multiple uses.
7. Summary
There are various methods of fertilization in fish, ranging from simple and efficient external fertilization to complex and precise internal fertilization. With the development of science and technology, mankind's understanding of the fertilization mechanism of fish has continued to deepen, providing important support for aquaculture and ecological protection. I hope this article helps you better understand the secrets of fish reproduction.
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