Asexual reproduction in animals - Types and examples

Asexual reproduction is a reproductive strategy carried out by certain animals and plants, in which the presence of two adult individuals of different sexes is not necessary.This type of strategy occurs when an individual produces genetically identical descendants to them.Sometimes, we can find the term clonal reproduction, since it gives rise to clone individuals of the parent.

Likewise, in this type of reproduction, germ cells (ovules or sperm cells) are not involved, with two exceptions, parthenogenesis and ginogenesis, which we will see below.Instead, they are somatic cells (those that make up all body tissues) or body structures.

There are many types and types of reproduction asexual in animals and, if we include plants and bacteria, the list is extended even further.Next, we show you the asexual reproductive strategies of more studied animals in the scientific world and, therefore, better known.

1.Vegetative multiplication:

The formulation is the typical asexual reproduction of marine sponges.It occurs when food particles accumulate in a particular type of cell of the sponges.These cells are isolated with a protective cover creating a formula that is subsequently expelled, giving rise to a new sponge.

Another type of vegetative reproduction is sprouting.A group of surface cells of the animal begins to grow to form a new individual that can finally separate or remain united and form a colony.This type of reproduction occurs in hydras.

Some animals can reproduce by fragmentation.In this type of reproduction, an animal can split into one or several pieces and, from each of those pieces a new complete individual develops.The most typical example we can observe in the life cycle of the starfish, because when they lose an arm, besides being able to rege To deny it, from this arm another individual is formed, clone of the original star..Non-fertilized lovulus can become a new complete organism.This type of asexual reproduction was described for the first time, a type of insect.

3.Ginogenesis:

Ginogenesis is another type of uniparental reproduction.Cells need a stimulus to develop an embryo, a sperm, but it does not donate its genome.So the offspring is a clone of the mother.The sperm used does not have to be of the same species as the mother, just a similar species.It is given in amphibians and teleosts.

Here is an example of reproduction by fragmentation in a starfish:

Asexual reproduction in animals - Types and examples

Image: Estrella de ma r in UAPA-Available at: http://uapas1.bunam.unam.mx/

Animals do not use this reproductive strategy as a usual method of reproduction, instead, they only carry it out at the moment adverse effects, such as changes in the environment, extreme temperatures, drought, absence of males, high predation, etc.

Asexual reproduction decreases genetic variability, which could result in the disappearance of a colony, group or population of animals if the abrupt changes in the environment continue.

Many organisms use asexual reproduction to perpetuate the species at a time that is not very suitable.Here are some examples.

Spongilla alba : is a type of freshwater sponge native to the Americas that can be reproduced by gelation when the temperature reaches-10ºC.
Planaria torva : it belongs to the edge of the flatworms or flat worms.They live in fresh water and are distributed throughout Europe.Twice by fragmentation.If it is cut into several pieces, each piece will produce a new individual.
Ambystoma altamirani : the montana stream salamander, like the rest of the salamanders of the Genus Ambystoma , can be reproduced by ginogenesis.They are native to Mexico.
Ramphotyphlops braminus : Blind shingles is native to Asia and Africa, although it was introduced in other continents.It is a very small snake, less than 20 centimeters and reproduces by parthenogenesis.
Hydra oligactis : Hydras are a kind of freshwater jellyfish that can reproduce by sprouting.They live in temperate areas of the northern hemisphere.

In the following video you can see the regeneration after the amputation of a flat worm, specifically of a Planaria torva :

Comments

Animals without central nervous system

What is the function of the nervous system? Any of us could answer this question by saying that the central nervous system serves us primarily to think, have ideas, awareness and we would not be wrong, but the nervous system goes further. The reason for its existence is to give animals the main characteristic that separates it from other groups of living beings, the locomotion .Animals are characterized among other things by our ability to move. Animals without central nervous system are not non-sentient animals , we must differentiate between perception of the environment and its possible threats and the presence or absence of a central nervous system. In this article of Animals and Pets Online we will talk about animals without central nervous system , starting with the definition of the system itself and the adaptations of animals that do not possess it. What is the central nervous system? The central nervous system is one of the two subdivisions of the nervous sy

VIVIPAR ANIMALS - Examples and characteristics

The viviparity is a form of reproduction present in the Most mammals, commonly referred to as viviparous animals, however, there are also other kinds of animals that carry out reproduction based on viviparity, such as certain amphibians, reptiles and fish. In this article from Animals and Pets Online you We will explain everything about viviparous animals , starting with the definition, showing you how embryonic development occurs in animals, the characteristics of viviparous animals and, finally, you will also find a complete list with names and examples of viviparous animals that you will be surprised to discover. What are viviparous animals? To really know what viviparous animals are, we will begin by reviewing the definition provided by the RAE (Royal Spanish Academy), which defines the adjective " viviparo, ra " of the following form: An animal said: Stop children in the well-developed phase of fetuses. Therefore, viviparous animals are those that lead

The best canine hairdressers at home in Barcelona

Don Pelut is a young company, animal lover and dedicated to guarantee your well-being through hygiene, food and fun , all of them fundamental pillars to live with a happy dog or cat.Yes, they are a food store and canine and feline hairdressing in Barcelona that offer a home pick-up and delivery service, so that the owner's hourly availability is not an excuse when keeping the fur and fur of his company animal in perfect condition. Don Pelut's goal is none other than to continue training, attending seminars and courses, to improve their techniques, to be lavish in terms of trends in aesthetics and nutrition, work methods and toys, both for cats and dogs.this way, they are trained to offer a complete ase soramiento in any of the mentioned environments to all those owners who need it.

Mammals in danger of extinction

At present there are numerous species both animal and plant that are at risk of disappearing.Human pressure on the natural habitats of animals causes serious consequences. The indiscriminate felling of forests, water pollution and farms, fragment the distribution areas of different species.We make their reproduction difficult isolating communities and diminishing their natural hunting. In this article of Animals and Pets Online we will talk about endangered mammals .Mammals are the animals that give birth to their young and they breastfeed them. Red list of endangered mammals The UINC, International Union for the Conservation of Nature, periodically elaborates the red list of endangered species.This list includes all the animal and plant species that are They are at risk of disappearing worldwide. With the data in this list we can observe the loss of biodiversity that occurs globally.Mammals are one of the groups that have the most endangered species.The hunting and destr

Why my dog has dry skin

Sometimes dogs suffer from having dry skin and this can lead to hardships or excessive scratching that causes them injuries.The speed of treatment will allow us to solve it effectively and prevent it from getting worse. It is essential to know some tricks in certain races that are prone to suffer from dry skin such as dogs without hair.Remember that it is important that you visit your veterinarian to make sure that it is not an allergy or other health problem. In this article of Animals and Pets Online we are going to respond to because your dog has dry skin analyzing some causes and the most appropriate treatment for it. Humidity During rainy days our dog usually gets wet.It can also happen when we go with him to the beach or the river.As a result, your animal can suffer the appearance of fungi or irritation of your dermis . Especially those with delicate skin such as shar pei or very long-haired dogs can stay wet for a long time.When you get home you should help the

What is sparring in dogfights?

Dog fights have been carried out in different cultures and populations for centuries, a macabre tradition that is still being carried out illegally in countries around the world.The fight against dog fights is endless. To carry out a dog fight it is essential to train the dog psychologically and physically to harden and show the desired attitude.We can highlight in these training the abuse of blows, punctures, stress and even drugs .A horrible situation to which no dog should undergo. Obviously this whole process has an economic purpose, for this reason it is not convenient for the illegals who carry out this practice to hurt in Too much the dog, that's where the sparring comes in: Sparring consists in using a dog as an entree for the fighting dog . Many of the dogs used for sparring are stolen from shelters and centers d and welcome, others from the same street.That is why the police stress so much the importance of not leaving our pet without supervision on public road

My cat is obsessed with food

Your cat does not eat only everything you put, but also anything do you fall to the ground? Also, does he go crazy every time he gets the scent of a can of food that you've opened and begs for food constantly? The obsession with food is a very common problem for many caregivers of cats that do not know how to avoid or correct it, knowing that it is not a healthy dynamic for the animal.In fact, your cat could have bad behaviors and aggressive attitudes with its surroundings if it is not pleased. In this Animals and Pets Online article we will explain what to do if your cat is obsessed with food , detailing the main causes and some of the treatments that you can apply to solve this problem. Why is your cat obsessed with food? Let's go straight to the source, the food.In this area we could have the first cause.Although your cat is eating all day, is not feeding enough , thing which is very different.Analyze the physical constitution of your cat and see if it is abnorm

Most common diseases of the Persian cat

The Persian cat is one of the oldest and most desired breeds known.to its peculiar physical constitution the Persian cat suffers from some recurring problems of which we will inform you in this article.This I have just commented does not mean that Persian cats are sickly, since if the needs that their precise morphology are properly addressed they do not usually have problems. In this article of Animals and Pets Online we will inform you of the most common diseases of the Persian cat , so that you learn to prevent them. Take note of them and Do not forget to visit the veterinarian on a regular basis to ensure that your cat's health is in perfect condition. Tricobezoares Persian cats are the feline breed whose hair is longer and denser, so they are more prone to suffering tricobezoars than other cats with shorter hair. Tricobezoars are hairballs that form in the stomach and digestive tract of the cat.Cats usually regurgitate hairballs, but sometimes they accumulate in t

Advantages of having a mongrel cat

There are approximately 100 breeds of cats officially recognized by the competent bodies in that matter, no However, they all have the typical characteristics of felines: an independent character, a conservation of the natural hunting instinct, great concerns to explore their surroundings, a great sense of hygiene and an amazing physical agility. Generally people who decide to host a cat in their home know that these are the main characteristics of these companion animals, but sometimes they look for a specific aesthetic that corresponds to a certain breed, which is a completely respectable decision, although in This time we will talk about other types of cats. In this article of Animals and Pets Online we explain what are the advantages of having a mongrel cat . What is a mongrel cat? We can define the concept of a mongrel cat in different ways, perhaps the simplest is to say that a mongrel cat is a cat that does not correspond to a standard of a certain breed , however, yo

Care of the angelfish

The pezangel is a beautiful species of fresh water.It comes from the tropics, so the water temperature is important for a good survival. The pezangel is informed that it is a species without excessive care problems.But this is deceptive.The correct ones Pezangel care take time and a series of previous actions so that the habitat for the pezangel is the right one.If all this is well prepared, then the pezangel will be comfortable and happy in your aquarium. If you continue reading Animals and Pets Online, you will know the correct way to take care of your pezangel. The pezangel aquarium Many aquarium hobbyists acquire an aquarium and some fish angels to enjoy their beauty.Most commonly, after a couple of weeks the fish die. This happens because the aquarium requires some concrete characteristics in its measurements (the pezangel is taller than long), therefore the aquarium must have a high height so that the pezangel roams the aquarium comfortably.Without their ventra

Animals and Pets Online

Search This Blog