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

Common salamanquesa: characteristics

The common salamanquesa ( Tarentola Mauritanica ) is a reptile belonging to the family of geconides ( Gekkonidae ) popularly known as "geckos".They are present in the Iberian Peninsula, Italy and many other countries.Due to their curious morphology, Some people wonder, is salamanquesa poisonous? The truth is that no, it is a totally harmless animal . In this Animals and Pets Online file we will show you everything you need to know about the common salamanquesa: origin, characteristics, habitat , food or reproduction.Read more, you'll be surprised to learn more about this little reptile! Origin of the common salamanquesa The salamanquesa is native to the western Mediterranean , although it is currently scattered around the world, mainly due to commercial activities, which have moved it to places as far away and exotic as Africa or America.Also by human mediation I reach the Balearic Islands and the Azores.But in addition, the salamanquesa has been able to adap...

Can I bathe my dog if I just wormed him?

When is it a first time in adopting a dog, it is normal that many doubts arise about what is best for them and when it is advisable to do everything, so Animals and Pets Online solves all the questions that arise. Deworming your dog periodically is necessary to preserve their health and avoid possible diseases from the action of microorganisms, external and internal parasites, among others.If you do not know when you should bathe your dog after a deworming , keep reading this article. Why deworm the dog? You may think that deworming is not necessary, but the truth is that thanks to it you avoid your dog much discomfort, in addition to prevent diseases transmitted by parasites . Among the main parasites, both external and internal, are ticks, fleas, lice, losacaros and intestinal worms, among many others.Pruritus, hair loss, diarrhea, tick disease, and even death in the most serious cases, they are part of the consequences that cause these beings to stay in the body of your furr...

ALL ABOUT THE FEVER IN DOGS

The fever in dogs or fever Canine is an increase in body temperature above normal values, which are between 38 and 39ºC , due, for example, to an infection or inflammation.There are different causes that cause the fever and we can easily measure it with the use of a digital thermometer. Next, in this article of Animals and Pets Online we will explain everything you need to know about fever in dogs, causes, symptoms and treatment to be applied to lower it.That is, if you suspect that your dog may suffer from fever, we recommend you go to your trusted veterinarian to discover the cause that is causing it and the treatment indicated according to your specific case. What temperature is considered fever in dogs? Fever is an excellent defense mechanism of the body .By increasing body temperature, the immune system seeks to destroy the pathogen.Therefore, it is a immune system reaction very beneficial for the dog in the face of an illness. The normal temperature of a dog Th...

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 nervou...

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 ...

Small dogs ideal for children

When we want to adopt a dog we must take into account several factors.One very important, if we have Children in our home, will be to welcome a dog that is patient and gets along with the little ones and supports without aggression the mischief that the children's minds are able to machine. If we do not have a very spacious and This factor also counts, the solution will be to adopt a dog of small size.Always informing our son of how to play with him so that he does not get to hurt him.Remember that the adoption of dogs teaches your children values, responsibility and rapport. In ExpertAnimal we will show you some suitable breeds that combine both factors, discover the small dogs ideal for children .However, remember that many of the dogs in the shelters (whether mestizo or breed) they are equally appropriate for a child, im It is important that both be happy together.Continue reading: Small dogs, great character It is well known that the idiosyncrasy of most small dogs is...

12 invasive species in Argentina and its consequences

According to the Ministry of Environment and Sustainable Development e , through the National Information System on Invasive Exotic Species, more than 650 invasive species were detected in Argentina .Many of these species were introduced by man, with the intention of obtaining economic benefits, "increase" the local level of sport hunting, or combat pests that were damaging agriculture or livestock. Although the idea of greater diversity in nature may seem interesting, the introduction of exotic animals and plants, Without a previous study of its environmental impact, it usually threatens the survival of the native fauna and flora of the country .In this new article of Animals and Pets Online, we present the main 12 invasive alien species in Argentina and its consequence s for the country's ecosystem. 1.Pinto starling (Sturnus vulgaris) The introduction of these birds is very recent in Argentina, but it already generates great concern for its impact on fauna...

My cat is very possessive of me, what should I do?

As with humans, cats can feel jealous and be very possessive of their tutors.While some people see jealousy as a demonstration of love, the truth is that a possessive cat can be a risk to themselves, their tutors and others people around them.Many times we see that a possessive feline becomes aggressive or hides when visitors arrive, or when a new family member is not properly introduced before entering their territory, which makes it impossible for a healthy coexistence in the home. Do you feel that your cat is jealous and doesn't want to share your attention with others? So, we invite you to continue reading this Animals and Pets Online article to know what to do if your cat is very possessive of you . Why are cats possessive of their owners? To answer this question we can think of human behavior itself.When a person feels jealous of someone, it is usually a sign that he is afraid of losing his attention or be replaced by another person, for a job or for a pet.This me...

10 human foods dogs can eat

Sharing leftovers or pieces of food with our best friend is one more way of improving our bond with it, however, it can also make you insistent and anxious at the time of our meal.However, how can we be sure that these foods will not harm you? In this Animals and Pets Online article we will detail 10 human foods dogs can eat , but we will also offer you some basic tips that you should keep in mind.Take note! 1.Meat (without salt or cooked bones) Dogs are not strictly carnivorous animals, as with cats, even so, meat should be the basis of their feeding .Although some are more recommended than others, we can Offer them any meat: chicken, turkey, pork, veal, lamb...We recommend avoid fried meat or salt use and bet on grilled, grilled or baked meat.These options will enchant you. Many people are currently betting on the barf diet, which implies offering the dog raw meat.In this case we must ensure the quality correctly to avoid the transmission of pathogens and parasites , wh...

Mediterranean rock fish

In the Mediterranean sea coast there is a very rich fauna and diverse.There are surface, medium and deep water fishes.And among the fish that live in the depths of the coast, the Mediterranean rock fish stand out. Many of these fish are masters of camouflage and can adopt an indistinguishable aspect, identical to that of the rock where they are seated.Others live hidden among the cracks and fissures of the underwater rockery. If you continue reading the Animals and Pets Online we will show you the most characteristic rock fish of the Mediterranean . Small size rock fish In the riverside rocks, part of which emerge out of the water, there are several species of small-sized rock fish .Next we will relate the most common ones. Maiden- Coris julis -, beautiful fish of vivid colors. Vaqueta -Serranus scriba -, very common serranido of the shallow waters. Castanuela- Chromis chromis -, a very small fish that lives in small shoals among the rocky shoals. Barriguda- Par...

Animals and Pets Online

Search This Blog