Migration in Animals, Birds, and Fishes

Migration, in biology, is the movement of animals from one location to another. Animals migrate looking for resources such as food, water, or favorable reproductive grounds. It is a common behavior seen in many species, including fish, birds, insects, and mammals.

There are many types of migration like seasonal migration and nomadic migration. In this article, we will cover the various types of migration and migration in different animals including birds and fishes.

Migration Definition

Migration is the movement of animals from one place to another in search of better resources or environmental conditions.

Migration Meaning

Animals move from one place to another in search of food, shelter, or a mate. This behaviour of animals is called ‘migration’. An example of migration is seen in the Monarch butterfly which migrates thousands of miles from North America to Mexico to avoid the winter. Wildebeests and zebras also travel distances during the African wildebeest migration looking for grass and water. These migrations support environmental balance and are necessary for the survival of these species.

Why do Animals Migrate?

Animals migrate for various reasons such as:

• Food and Resources: Animals migrate looking for areas with abundant food and resources. They often migrate during dry seasons to find lush grazing lands and water.
• Climate and Weather: During winter months, animals migrate to warmer areas to escape the harsh weather conditions. For example, Siberian cranes migrate to India to avoid the winter in Siberia.
• Breeding: Animals and fishes migrate to breed and ensure the survival of their young ones. For example, Salmon fishes move from oceans to freshwater to spawn.

Types of Migration in Animals

The types of migration in animals depends on the season, food and resource availability, and reproductive cycles. The different types of migration are given below:

• Seasonal Migration: This involves regular movements between breeding and non-breeding areas in response to changes in seasons.
• Altitudinal Migration: Species migrate to higher or lower altituedes in mountainous regions to find suitable climatic conditions or food sources.
• Long-Distance Migration: Some species travel for great distances spanning continents or oceans, to reach breeding or feeding grounds.
• Nomadic Migration: Certain species exhibit irregular migration patterns, moving unpredictably in search of resources.
• Breeding Migration: Animals migrate to breed and reproduce in areas with suitable conditions for raising offspring. Example seen in Salmon fishes.
• Short-Term Migration: Seasonal or periodic movements over relatively short distances, often driven by factors like food availability, mating, or environmental conditions. They return to their original place after some time.

Migration in Animals

Many terrestrial and aquatic animals undergo migration as a survival technique. Some examples of migratory animals are given below:

• Wildebeest Migration: Every year, millions of wildebeest migrate across the Serengeti plains in Africa in search of fresh grazing grounds and water sources.
• Monarch Butterfly Migration: Monarch butterflies travel from North America to Mexico, where they gather in large numbers to escape winters their breeding areas and to find suitable overwintering sites.
• Humpback Whale Migration: They migrate annually in the summers towards the polar ice to feed on small fishes, and travel back to warmer waters during winters.

Migration in Birds

Bird migration is a remarkable natural phenomenon observed particularly among birds native to the Northern Hemisphere. During the spring season, these birds migrate northwards to feed on abundant food resources. However, as winter approaches and food availability diminishes, they journey southwards, often covering vast distances to reach warmer climates. Some examples of migratory birds are as follows:

• Arctic Tern: They are known to have the longest migration route of any bird, traveling from the Arctic to the Antarctic and back annually.
• Swallows: These birds migrate from their breeding grounds in North America and Europe to warmer regions in Central and South America during the winter.
• Bar-headed Goose: Flies over the Himalayas between its breeding grounds in Central Asia and wintering areas in India.

Migration in Fishes

Migration in fishes involves the seasonal movement of fish populations for various reasons, including reproduction, feeding, and escaping unfavorable environmental conditions. These migrations often occur along specific routes or pathways.

Examples of migration in fishes include:

• Salmon: Salmon migrate from the ocean to freshwater rivers and streams to spawn. After hatching, the young salmon migrate back to the ocean, where they mature before returning to freshwater to spawn again.
• Eels: Eels undertake long-distance migrations from freshwater rivers to the ocean to spawn. After spawning, their larvae drift with ocean currents back to freshwater habitats, where they mature.
• Anadromous species: Several species, such as shad, sturgeon, and striped bass, migrate from the ocean to freshwater rivers to reproduce. They then return to the ocean after spawning.

Conclusion – Migration in Animals, Birds, and Fishes

In conclusion, migration in biology is animal behaviour where they move from one location to another in search of resources and favorable conditions for survival and reproduction. It includes various types of movements, such as seasonal, altitudinal, long-distance, nomadic, and breeding migrations. Some examples of migratory animals are wildebeest, monarch butterflies, and humpback whales. Birds and fishes undertake migration as well. Understanding migration is crucial for conserving biodiversity and preserving ecosystems worldwide.

FAQs on Migration in Animals, Birds, and Fishes

What is Migration in Science Class 7?

Migration refers to the seasonal movement of animals from one place to another due to reasons such as food unavailability, harsh weather conditions, or unsafe breeding grounds.

What is the Migration of Fish?

Fish migration involves the movement of fish populations between different habitats for various reasons such as reproduction, feeding, or avoiding predators.

Why do Birds and Fish Migrate?

Birds and fish migrate for reasons including breeding, finding food, escaping harsh weather conditions, and accessing suitable habitats for survival.

What is Migration of Animals Class 8?

Migration of animals refers to the movement of different animal species from one region to another, often influenced by seasonal changes or environmental factors.

List some Animals that Migrate?

Some examples of animals that migrate include birds like swallows and geese, mammals like wildebeest and caribou, and marine species like whales and sea turtles.

What are the Different Types of Migration of Species?

Different types of species migration include seasonal, altitudinal, diurnal/nocturnal, and irruptive migrations, each driven by various factors like climate, food availability, or breeding needs

What is an Example of Migratory Species?

An example of a migratory species is the Arctic tern, which undertakes one of the longest migrations. They travel from its breeding grounds in the Arctic to its wintering grounds in Antarctica and back each year.