Aquatic mammals - Characteristics and examples

All living beings on the planet have their origin in the aquatic environment .Throughout evolutionary history, mammals have been changing and adapting to conditions on the surface of the earth until, several million years ago, some submerged themselves in the oceans and rivers, adapting to life under these conditions.

In this article of Animals and Pets Online we will talk about aquatic mammals, better known as marine mammals, since it is in the seas where a greater number of species of this type They inhabit.Discover the characteristics of these animals and some examples.

Characteristics of aquatic mammals

The life of mammals in water is very different from that of terrestrial mammals.In order to survive in this environment, they have had to acquire special characteristics during their evolution.

Water is a much denser environment than air and, in addition, offers greater resistance, so aquatic mammals have an extremely aerodynamic body that allows them to cope easily.Develop fins similar to those of fish has been a significant morphological change.It allows them to increase speed, direct swimming and communicate.

Water is a medium that absorbs much more heat than air, for This, the aquatic mammals have a thick layer of fat under a hard and robust skin , which keep them isolated from these heat losses.when they live in very cold areas of the planet.Some marine mammals have hair, because certain vital functions are carried out outside the water, such as reproduction.

Those marine mammals that, in certain periods of their lives, inhabit the great depths, have developed other organs to be able to live in the darkness, like the sonar .The sense of sight in these ecosystems is not subtle, because sunlight does not reach that depth.

Like all mammals, these aquatic animals have mammary glands that produce milk for their offspring, sweat glands and gestate on their progeny inside their body.

Breathing of aquatic mammals

Aquatic mammals need air to breathe .Therefore, they take large amounts of air and keep it inside their lungs for long periods of time, when they submerge after taking air, are able to redirect blood to the brain, heart and skeletal muscle.Their muscles have a large concentration of a protein called myoglobin , capable of accumulating large amounts of oxygen.

In this way, aquatic animals are able to remain considerable periods of time without taking air.The young and newborn babies do not have this capacity developed, so they will need to take air more times than the rest of the group.

Types of aquatic mammals

Most species of aquatic mammals live in the marine environment.There are three orders of aquatic mammals: cetacea, carnivora and sirenia.

Order cetacea

Inside of the cetacea order, the most representative species are whales, dolphins, sperm whales, killer whales and porpoises .The cetaceans evolved from a species of terrestrial carnivorous ungulate more than 50 million years ago.The cetacea order Divide into three suborders (one of them extinct):

Archaeoceti : predecessor terrestrial quadruped animals of the current (extinct) cetaceans.
Mysticeti : they are whales with beards.They are carnivorous animals without teeth that take large puffs of water, then filter it through their beards and with the tongue collect the trapped fish.
Odontoceti : Dolphins, killer whales, porpoises and zifios are included here.It is a very diverse group, although its main characteristic l is that they have teeth.In this group we can find the pink dolphin ( Inia geoffrensis ), a kind of mammal aquatic river.

Carnival order

In the carnival order, we include seals, sea lions and walruses , although they could also include to the sea otter and polar bears.This group of animals appeared about 15 million years ago and are believed to be closely related to mustelids and asses (bears).

Order sirenia

Elultimo order, sirenia, includes dugongs and manatees .These animals have evolved from the tetiteriums, animals very similar to the elephants that appeared about 66 million years ago.The dugongs inhabit Australia and, manatees, in Africa and America.

List of examples of aquatic mammals and their names

Cetacea order

Mysticeti:

Greenland Whale ( Balaena mysticetus )
Whale Southern right ( Eubalaena australis )
Glacial free whale ( Eubalaena glacialis )
Pacific free whale ( Eubalaena japonica )
Common Rorcual ( Balaenoptera physalus )
Rorcual sei or borealis (Balaenoptera borealis)
Rorcual de Bryde (Balaenoptera brydei)
Tropical whale (Balaenoptera edeni)
Great blue whale or blue whale (Balaenoptera musculus)
Aliblanco, dwarf or common minke ( Balaenoptera acutorostrata)
Rorcual austral or Antarctic minke (Balaenoptera bonaerensis)
Rorcual of Omura (Balaenoptera omurai)
Yubarta or humpback whale ( Megaptera novaeangliae )
Gray whale ( Eschrichtius robustus )
Pygmy whale ( Caperea marginata )

Odontoceti:

Tonina overa ( Cephalorhynchus commersonii )
Heaviside dolphin ( Cephalorhynchus heavisidii )
Coastal common dolphin ( Delphinus capensis )
Pygmy killer whale ( Feresa attenuata )
Calderon common ( Globicephala melas )
Risso's dolphin ( Grampus griseus )
Fraser dolphin ( Lagenodelphis hosei )
Atlantic dolphin ( Lagenorhynchus acutus )
Northern dolphin without fin ( Lissodelphis borealis )
Common killer whale ( Orcinus orca )
Hong Kong pink dolphin ( Sousa chinensis )
Delfin listed ( Stenella coeruleoalba )
Bottlenose or bottlenose dolphin ( Tursiops truncatus )
Boto, Amazon dolphin, pink dolphin ( Inia geoffrensis )
Baiji, Chinese river dolphin ( Lipotes vexillifer )
Silver Dolphin ( Pontoporia blainvillei )
Beluga ( Delphinapterus leucas )
Narval ( Monodon monoceros )

Carnival order

Seal Mediterranean monk ( Monachus monachus )
Northern sea elephant ( Mirounga angustirostris )
Leopard seal ( Hydrurga leptonyx )
Common or harbor seal ( Phoca vitulina )
Australian and South African sea lion ( Arctocephalus pusillus )
Guadeloupe sea bear ( Arctophoca philippii townsendi )
Steller's sea lion ( Eumetopias jubatus )
California sea lion ( Zalophus californianus )
Sea otter ( Enhydra lutris )
Polar bear ( Ursus maritimus )

Sirenia order

Dugongo ( Dugong dugon )
Caribbean Manati ( Trichechus manatus )
Amazonian Manati ( Trichechus inunguis )
African Manati ( Trichechus senegalensis )

If you want to read more articles similar to Aquatic mammals-Features and examples , we recommend that you enter our Curiosity section It's from the animal world.

References

https://basicbiology.net/animal/mammals/marine

Bibliography

Irving, L.1973.Comparative Physiology of Thermoregulation.ACADEMIC PRESS, INC.2: 47-96.

Kramer, DL1988.The behavioral ecology of air breathing by aquatic animals.Canadian Journal of Zoology, 66 (1 ): 89-94.

Comments

All about the zeal in cats

Do you think your cat is in heat period ? It is important that you know how to recognize when the animal is in this moment so that you can understand its attitude and take care of it with the attention it requires.Keep in mind that a cat's zeal is different from that of a cat , that is why, below we differentiate the different characteristics according to the gender so that you get a better understanding with your pet. In this article of Animals and Pets Online we want you to learn everything about the zeal of cats : the characteristics, symptoms and care required. The zeal in female cats We will start talking about zeal in cats since it is the most complex.The first thing you should know is that the periods of heat occur at certain times of the year, times when the cat is predisposed to be fertilized by the male to procreate, but not all year they will allow the sexual encounter: only when they are with the zeal. A cat begins to have the first zeal towards at 6 or 9...

10 reasons to walk your dog

The dog is an animal that needs to walk 2 to 3 times a day, But do you know why that is so? In this article of Animals and Pets Online we will explain why it is so important to walk with your dog, why the garden does not replace the walk and many other things that, perhaps you do not know. Do not forget This is a very important habit that you must carry out on a daily basis.Not doing so can be very harmful for your pet, do not forget it.Keep reading and discover 10 reasons to walk with your dog . 1.They must make their needs The first reason, and the most important , to take a dog for a walk, is to allow him to do his needs until he is satisfied. Apart from puppies that are not yet able to go outside or who are learning to urinate, it is very negative to allow our dog to urinate and defecate at home.In addition to causing a bad smell, we will be creating an unhealthy environment important that can lead to serious health problems in dogs and humans. 2.It allows them to ...

Poodle dog or medium poodle: features

The poodle or poodle is one of the best known dogs in worldwide, due to their elegance, intelligence and balanced character .According to the International Cinological Federation (FCI), poodle dogs are classified into four varieties according to their size: toy, dwarf, medium ( or standard) and giant.However, other cynological associations may have different criteria.For example, the American Kennel Club (AKC) only recognizes three varieties of poodle dogs according to their size: miniature standard and toy. If you are thinking of adopting a poodle or poodle dog, it is very important that you properly inform yourself about the character, temperament with other dogs, the characteristics and the care that this breed requires.In addition, we will also talk about training and education , very important details to have e No matter if we want a sociable and happy adult dog. Keep reading this breed form and find out all about the medium poodle or poodle : Poodle History This is one...

How much an anaconda can measure

Many people have a snake as a pet.If you like snakes, and Above all, if you like big snakes, the anaconda is an animal that interests you.This type of snake is considered the largest in the world, but be careful, not heavy, not long. If you It has stung curiosity, do not forget to read this new article of Animals and Pets Online, and we will reveal you until how much an anaconda can measure . Do not forget to comment and share your photographs so other users can see them too! Anaconda types Four types of anaconda are known : Green or common anaconda Yellow anaconda Anaconda Beni or Barbour Anaconda de Deschauensee The green anaconda (Eunectes murinus) Of the four is the most common .It can be found in different countries of South America: Guyana Trinidad Island Venezuela Colombia Brazil Ecuador Peru Bolivia Northeast of Paraguay Its color is a dark green with black spots rounded along its entire body, also on the flanks The belly is lighter,...

The best hours to walk a dog

For starters it is important to note that dog walks should always be done at the same times, that is, you should follow a very regular schedule that allows them to anticipate that they will go out Although a priori does not seem relevant, the truth is that dogs are animals of customs, so being able to anticipate will help them to be more balanced . In addition to following a schedule marked, the frequency of the walks can vary from one dog to another: some breeds, such as the border collie, will need between two and four daily walks, but others such as the pug or, for example, a very old dog, will have enough with two It is not always easy to know how many times to take a dog for a walk, but some factors such as age or energy level that we observe can help us. Now that you know these Previous details, we will explain what is the best time to walk a dog and what is more convenient to do in each of the schedules: 1.Tomorrow During the morning the dog should be able to enjoy...

Bach flowers for cats

In the last few years we hear frequent talk of Bach flowers, also applied to our Companion animals.There are more and more numerous cases treated with this therapy, as well as veterinary professionals who are trained in this discipline.In this article of Animals and Pets Online we will focus on cats to discover what Bach flowers are, which These are the benefits and uses they can have for our cats.If you've ever heard of these Bach flowers for cats , you're interested in reading! What are Bach flowers? The 38 extracts of flowers and plants discovered by the English doctor Edward Bach in the early twentieth century are called.This doctor chose plants that acted on different conditions that could experience the human beings, such as fear, sadness, anger or hyperactivity.Prepared these plants in the form of dilutions that conserved with alcohol in a dropper to facilitate their use.Various drops were administered directly several times a day or put in the water or even in t...

My lovebird has diarrhea - Causes and treatment

Lovebird has become one of the most frequently birds they find in our homes.Their color, their beauty, and that nickname of "inseparable" that we like so much, makes them as appreciated as the canaries were once. But the arrival of any bird, exotic or not , puts us in front of new situations that sometimes we are not accustomed to face.Animals and Pets Online will try to help distinguish pathological situations from those that are not, and to handle us in the event that our lovebird has diarrhea , In the following article we explain the possible causes that cause it . It is not always diarrhea, even if it seems We may notice that there are more liquid stools than usual in our lovebird on the floor of the cage and identify it as diarrhea, even if it is not. Evacuations Sewers in birds are made up of a greenish part (they can vary in color if they take feed, they are real feces), a white part (urates, mineral salts), and a liquid part (urine).Everything goes out...

Differences between a Persian cat and an angora

Although both breeds are known and popular, for some lovers of cats the differences between a Persian cat and an angora are not entirely clear, perhaps because they both have a spectacular long coat, but the differences between both races are remarkable and, if we want to adopt any of these cats, it is important that we have them in order for our new cat to adapt as well as possible to our home. This is why in this article of Animals and Pets Online we will expose the differences between a Persian cat and an angora .If you intend to adopt any of these cats, this article of Persian cat vs Angora is essential! Physical differences between Persian and Angora cats We begin this review of the differences between a Persian cat and an angora for the most obvious, that is, those that refer to physical aspects.These are going to be the following: The nose: it is, perhaps, the most important and significant, in addition, at first glance it will allow us to differentiate a Persian cat a...

How to receive a puppy at home?

Knowing how to receive the puppy at home will be essential to perceive our home from For that reason, in Animals and Pets Online, we will explain everything you need for your arrival: the objects and the necessary learning. And we must not forget that the puppy, despite being young , he is learning from everything he sees around him.A relaxed and positive attitude with him will make him a dog with these instilled characteristics in the future. Keep reading and discover how to receive the puppy in Home , with tricks and useful tips to know what to do and what not to do: 1.Prepare your puppy's bed When a family decides to have a baby, they meditate before the whole process that is about to occur.They also prepare with enough time to have everything ready.Well, a puppy also needs all these previous steps.Ideally, upon arrival, everything is ready to receive you with great enthusiasm and love. There are several things that a family must prepare before the puppy arrives ho...

Types of herbivorous reptiles

There are many reptile fans who would like to start adopting and possess some very easy to maintain .However, most of the usual reptiles in pet stores have a common factor that puts these first time fans behind: almost all reptiles for adoption are insectivorous. This displeases these fans for various reasons.One very important thing is that insects cause them to repeat.Another factor to keep in mind is that incessant trips to the store must be made to provide themselves with live food, which often escapes and colonize the house.Crickets escaped inside a home can plunge their inhabitants into an insomniac despair.It is also not pleasant for many people to make a colony of crickets at home. If you are any of these fans, continues reading this p ost as Animals and Pets Online will tell you the different types of herbivorous reptiles. Land turtles Without a doubt, the most frequent herbivorous pet reptiles are the land turtles .In addition, they are also the easiest to maintain ...

Animals and Pets Online

Search This Blog