ipl-logo

Sirenia In Humans

1872 Words8 Pages

Sirenia is a small order consisting of two major families namely Dugongidae and Trichechidea. The family Trichechidea has three species namely : West Indian Manatees (Trichechus Manatees) , African Manatees ( Trichecus senegalensis ) , Amazonian manatees (Trichechus inunguis). There is stand out surviving part of family Dugongidae, dugongs (Dugong dugon). They are large aquatic mammals with tapering to paddle like dorsoventrally flattened bilobed tails .The order Sirenia is based on sirens i.e " seanymphs " and " sea cows " and it is a school of thought that mermaid meets have originated from these animal .My assignment will focus on the systematics,the various systems and their role in ecosystem.

HABITAT …show more content…

Whereas in case of dugongs,they are also seen to breathe through their special nostrils .Dugongs also follow the same process as that of manatees as mentioned above.

CIRCULATION
Manatees have circulatory system same as mammals.The manatee has four chambered heart. It beats for about 60 times per minute as compared to human heart which beats for about 80 times per minute.A manatees heart is seen to beat slow as 30 heartbeats per minute on longer dives.
Whereas in dugongs it has double ventricular apex of heart. The unusual feature of the sirenian heart is that the heart has double subvalvular conus and dorsal left atrium.The brachial artery of retial structure is seen to play an important role in thermo-regulation.

Show More
Related

Crayfish Case Study

235 Words | 1 Pages

Internal temperatures can modify the contraction of the heart by increasing or decreasing heart rate.5 The goal of the experiment was to subject the crayfish to different conditions to monitor the change in contractility of the

Read More

Riversleigh Fossil Site, Australia

2212 Words | 9 Pages

Riversleigh Fossil Site, Australia Geological History Riversleigh covers an area of approximately 80 square kilometres and is located 250 km north-west of Mt Isa. Riversleigh is Australia’s most famous fossil site and fossils were first discovered in the area in 1901. The fossils document the evolution and changes of Australia's terrestrial fauna and ecosystems.

Read More

Cheating On The Beachmaster Summary

582 Words | 3 Pages

Cheating on the Beachmaster by Rebecca Kessler has explained an intriguing behavior of female Southern elephant seals. The entire species of elephant seals are well known for their polygynous mating behavior, in which one male elephant seal dominates several females until another stronger male elephant seal dethrones him. This process involves violent fightings among the males and many other brutish behaviors. According to Burney J. Le Boeuf, a marine biologist studies elephant seals for years at the University of California, male elephant seals have the “habit of biting the neck when copulating”. Meanwhile, female elephant seals and their pups are expected to very vulnerable and independent because of their relatively smaller sizes compared to those of the males.

Read More

The Importance Of Manatees In Florida

264 Words | 2 Pages

Their front flippers help them steer, or sometimes crawl, through shallow water.’’ Even though it seems like Manatees have small eyes and no outer ear, manatees can see and hear very well. Manatees play an important role in the plant growth in shallow bays, rivers, estuaries, canals and coastal waters,

Read More

Why Do Manatees Migrate

198 Words | 1 Pages

Manatees live in north american east coast, shallow slow moving rivers, saltwater bays, canals, and the coastal areas. They eat seagrass and freshwater vegetation. They are losing their habitats they really need to live. The migration route for a manatee in winter and summer is back and forth from the east and west coast of Florida.

Read More

Geography Quiz

882 Words | 4 Pages

Biotic components of ecosystems include plants, animals, and fungi living in that ecosystem that interact with the environment and other abiotic and biotic components. 8. Create a chart of the major characteristics of and differences between the following terrestrial biomes: Tundra, taiga, grasslands, temperate deciduous forest, desert, monsoon rainforest, tropical rainforest. 9. Create a chart of the major characteristics of and differences between the following aquatic biomes: freshwater ecosystems such as lakes, wetlands, and streams, marine biomes such as estuaries, intertidal zone, neritic zone, open sea zone, and deep sea zone.

Read More

Argumentative Essay On Rouge Sharks

558 Words | 3 Pages

This essay will be exploring rouge sharks and will be expressing an informed opinion on why they should be conserved in most of the situations. In this essay points that will be discussed will be not limited to how sharks kill a relatively small amount of people, that sharks do not enjoy eating people and that. The main point that I would like to get across is that sharks do not like to eat people, after one bite they generally don’t come back for another taste as we as people don’t have enough fat or flesh on our body for a shark to bother eating us along with the fact that we are very bony compared to a sharks regular prey such as seals, smaller fish and even other smaller sharks which means that the sharks have evolved to digest those animals with small bones or hardened cartridge and not our big thick bones.

Read More

Comparsion Of The Myth In Margaret Atwood's The Sirens

1281 Words | 6 Pages

Everyone is familiar with myths. Whether we believe in them or not. Myths are something that people believe in that represents the actual world, an example of the world, but in an interesting story that isn’t true. For example, the famous story about Ulysses causing himself to get tied up on the mast, asking his workers not to unstrap him from the mast. The sirens show up and Ulysses stops his workers ears and his own ears with ear wax so they won’t have to hear the sirens singing their song.

Read More

Research Paper On Manatees

925 Words | 4 Pages

A group of manatees is called an aggregation and if you 're ever fortunate enough to observe one, you 'll notice gentle, affectionate behavior. They nudge and snuggle each other playfully, and might do the same to you if you joined them in the water, but as with any wild creature, it 's best to remain a passive observer. For example, quietly paddle a canoe through a calm river (they can switch from salt to fresh water with no problem!) in Southern Florida

Read More

Silent Birds: The Heart Rates Of Hummingbirds

197 Words | 1 Pages

Have a look at this looseferfact to know more about the heart rates of hummingbirds. The name "hummingbird" stems from the evidence

Read More

Read And Isolate Essential Information From The Article 'Introduction To Ecology'

1587 Words | 7 Pages

Using the provided template as a guide, complete a key star outline and write an accordion paragraph summary. Cite evidence from the article “Introduction to Ecology” that explains the level of organization and describes primary and secondary successions. Include how energy is transferred through an ecosystem with respect to biotic and abiotic

Read More

Pros And Cons Of Invasive Species

1618 Words | 7 Pages

4. Habitat alteration: Removal and reduction of natural habitat by flooding, soil erosion and water

Read More

Species Diversity And Size Of Area Essay

905 Words | 4 Pages

The findings of this project must however been subjected to some scrutiny as the plots were situated in disturbed areas of savannah. This could have a direct effect on the number of species in the area and therefore greatly change the conclusion of this research. However, the biome the plot was situated was still savannah and thus adequate conclusions can still be drawn from the

Read More

The Negative Impacts Of Invasive Plants And The Environment

1779 Words | 8 Pages

In contrast some plant species which are considered as invasive plants are still using in many forest management practises. So it is important to investigate whether they are really invasive, or whether they really negatively impact on ecosystem and to understand what are their impacts on ecosystem, in order to have a

Read More

Essay On Forest Management

1265 Words | 6 Pages

Sustainable forest management requires three major criteria which are the maintenance of ecological processes within the forest (soil formation, energy flow, biogeochemical cycles (carbon, nutrient and hydrological cycles), maintenance of biodiversity of forest, improving the net social benefits derived from the mixture of forest uses within the constraints by considering the future. Forest provides habitats for more than half of the fauna and flora on the Earth (SCBD, 2001). Forest biome plays an important role in mitigating climate change by serving as carbon sinks (Hassan et al., 2005). Forest land is the most fundamental natural resources which become reduced mainly due to anthropogenic pressures. For proper management of land, it is essential to have information about existing land cover and about the naturalness of the land.

Read More

More about Sirenia In Humans

Related Topics

Open Document