Economic Significance Continental Shelf
- Most commercial exploitation from the sea, such as metallic-ore, non-metallic ore, and hydrocarbon extraction, takes place on the continental shelf.
- The shallowness enables sunlight to penetrate through the water, which encourages the growth of minute plants and other microscopic organisms planktons . Thus continental shelves are the richest fishing grounds in the world. E.g. Grand Banks of Newfoundland, the North Sea and the Sunda shelf.
- Their limited depth and gentle slope increase the height of tides. Since ships can only enter and leave port on the tide, most of the Worlds greatest seaports including Southampton, London, Hong Kong, Singapore and Rotterdam are located on Continental Shelves.
Dolphins Possess A Neocortex
All mammals have a neocortex. This is a section of the brain which houses higher level thinking, as well as memory, cognition, perception, language skills and motor commands. Because dolphins have a neocortex, they must categorically be classed as mammals. Dolphins process a particularly complex neocortex, and are known to exhibit self awareness, problem solving and higher level thinking. This is largely why they are thought to be some of the most intelligent creatures on Earth.
How Can We Help Endangered Dolphins
Here are some things you can do to help make the dolphins world safer and healthier:
Read Also: Prince Jackson Real Father
What Are 10 Interesting Facts About Dolphins
Top 10 facts about dolphins
- Dolphins can be found all over the world and in different environments.
- Freshwater dolphins.
- Underwater noise pollution is a real threat to dolphins.
- Theyre fast sprinters.
- How do you eat a fish?
- They like to blow bubbles.
- Dolphins are chatty animals.
- Theyre intelligent, like us.
The Course Of The Ganges River
The headwaters of the Ganges River begin high in the Himalayan Mountains where the Bhagirathi River flows out of the Gangotri Glacier in India’s Uttarakhand state. The glacier sits at an elevation of 12,769 feet . The Ganges River proper begins farther downstream where the Bhagirathi and Alaknanda rivers join. As the Ganges flows out of the Himalayas, it creates a narrow, rugged canyon.
Also Check: Is Paris Jackson Michael’s Biological Child
What Is A Superpod
A pod is a name for a group of dolphins living together. There can be anywhere from a couple dozen to couple hundred of dolphins in one pod. It allows them to catch prey more efficiently, escape from predators but also to care for the individuals that might be hurt or ill. Sometimes different pods merge and form a superpod that contains over 1000 dolphins. These enormous pods are usually only short-term as they occur when they come across areas that contain copious amounts of food, so there is no competition.
Geography Of The Ganges River
- M.A., Geography, California State University – East Bay
- B.A., English and Geography, California State University – Sacramento
The Ganges River, also called Ganga, is a river located in northern India that flows toward the border with Bangladesh. It is the longest river in India and flows for around 1,569 miles from the Himalayan Mountains to the Bay of Bengal. The river has the second greatest water discharge in the world, and its basin is the most heavily populated in the world with over 400 million people living in it.
The Ganges River is extremely important to the people of India as most of the people living on its banks use it for daily needs such as bathing and fishing. It is also significant to Hindus, as they consider it their most sacred river.
Don’t Miss: What Is Vo In Physics
Flows Into Bay Of Bengal
Once the Ganges River flows out of India and into Bangladesh, its main branch is known as the Padma River. The Padma River is joined downstream by large rivers like the Jamuna and Meghna rivers. After joining the Meghna, it takes on that name before flowing into the Bay of Bengal. Before entering the Bay of Bengal however, the river creates the world’s largest delta, Ganges Delta. This region is a highly fertile sediment-laden area that covers 23,000 square miles .
World Range & Habitat
Join the MarineBio Facebook Group
Recommended Reading: Molecular Geometry Report Sheet Answer Key
Tail Of Dolphins Align Horizontally
All fish, including sharks, have tail fins that are aligned vertically. This means that their tails move in a side to side motion, cutting through the water like a rudder. Dolphins, however, do not have this characteristic fish trait, as their tails align horizontally. Like whales and other marine mammals, these horizontal tails move in an up and down motion to propel the animal forward through the water.
The Population Of The Ganges River
The Ganges River basin has been inhabited by humans since ancient times. The first people in the region were of the Harappan civilization. They moved into the Ganges River basin from the Indus River basin around the 2nd millennium BCE. Later, the Gangetic Plain became the center of the Maurya Empire and then the Mughal Empire. The first European to discuss the Ganges River was Megasthenes in his work Indica.
Recommended Reading: What Influence Did Geography Have On Greek Society
International Convention On Continental Shelf
- Sovereign rights over their continental shelves up to a depth of 200 metres or to a distance where the depth of waters admitted of resource exploitation were claimed by the marine nations that signed the Convention on the Continental Shelf drawn up by the UNs International Law Commission in 1958.
- This was partly superseded by the 1982, United Nations Convention on the Law of the Sea which created the 200 nautical mile-exclusive economic zone and extended continental shelf rights for states with physical continental shelves that extend beyond that distance.
- The legal definition of a continental shelf differs significantly from the geological definition. UNCLOS states that the shelf extends to the limit of the continental margin, upto 200 nautical miles from the baseline.
- Thus inhabited volcanic islands such as the Canaries, which have no actual continental shelf, have a legal continental shelf, whereas uninhabitable islands have no shelf.
12.3. CONTINENTAL SLOPE
12.4 DEEP SEA PLAIN
Reliefs Of The Oceans
13.1 BOTTOM RELIEFS OF ATLANTIC OCEAN
13.1.1 ATLANTIC OCEAN ATLANTIC OCEAN
- The Atlantic Ocean located between North and South Americas in the West and Europe and Africa in the East covers an area of 82,000,000 km.
- It covers one-sixth of the geographical area of the earth.
- The S shape of the ocean indicates the fact that landmasses on its either side were once a contiguous part.
- The ocean was formed due to drifting of North and South America to the west due to plate tectonics.
- The average depth of the ocean is less than the Pacific Ocean because of continental shelves and marginal and enclosed seas.
- The Atlantic Ocean widens to the south of equator. It narrows down towards the equator. It narrows down in the extreme north and contacts the Arctic Ocean.
- Currently, widening of the ocean is observed through seafloor spreading.
13.1.2 CONTINENTAL SHELF
Effects Of Climate Change On The River
The Tibetan Plateau contains the world’s third-largest store of ice. Qin Dahe, the former head of the China Meteorological Administration, said the recent fast pace of melting and warmer temperatures will be good for agriculture and tourism in the short term, but issued a strong warning:
- “Temperatures are rising four times faster than elsewhere in China, and the Tibetan glaciers are retreating at a higher speed than in any other part of the world… In the short term, this will cause lakes to expand and bring floods and mudflows.. In the long run, the glaciers are vital lifelines of the Indus River. Once they vanish, water supplies in Pakistan will be in peril.”
“There is insufficient data to say what will happen to the Indus,” says David Grey, the World Bank’s senior water advisor in South Asia. “But we all have very nasty fears that the flows of the Indus could be severely, severely affected by glacier melt as a consequence of climate change,” and reduced by perhaps as much as 50 percent. “Now what does that mean to a population that lives in a desert , without the river, there would be no life? I don’t know the answer to that question,” he says. “But we need to be concerned about that. Deeply, deeply concerned.”
U.S. diplomat Richard Holbrooke said, shortly before his death in 2010, that he believed that falling water levels in the Indus River “could very well precipitate World War III.”
Are Dolphins Mammals Or Just Large Fish
Dolphins are not fish, and they differ from them in a myriad of ways. Even though they look similar in their physical appearance and their habitat, dolphins cannot survive underwater without frequently coming up for air. If they were not able to come to the surface to get air, they would drown as easily as a human would. Fish do not need to surface as they can extract the required oxygen directly from the water. Dolphins have tails as fish do, however, since they have evolved from mammals that lived on land and had legs, their tails move in an upward-downward motion.
Don’t Miss: My.hrw Algebra 1
Fast Facts: Dolphin Fish
- Scientific Name: Coryphaena hippurus Coryphaena equiselis
- Other Names: Dolphinfish, dolphin, mahi-mahi, dorado, pompano
- Distinguishing Features: Brilliantly colored fish with single dorsal fin spanning the length of the body males have protruding foreheads
- Average Size: 1 meter in length and up to 40 kilograms weight
- Diet: Carnivorous
- Life Span: Up to 5 years, but usually less than 2 years
- Habitat: Temperate, subtropical, and tropical oceans worldwide
- Conservation Status: Least Concern
- Order: Perciformes
- Family: Coryphaenidae
- Fun Fact: The dolphin fish is a very fast swimmer, reaching speeds of nearly 60 mph.
Are Dolphins The Same As Porpoises
Not really, no. Dolphins are typically larger than porpoises who are usually less than 8 feet long. Dolphins also tend to be more slender, have a bigger head, and a larger beak . Another significant difference between these two species is the shape of their teeth: dolphins have cone-shaped teeth while porpoises have teeth that resemble a spade.
Also Check: Geometry Warm Ups
What Are The Biggest Threats To Dolphins Today
Even though people have hunted dolphins in the past for a variety of reasons , their biggest modern threat is getting caught in fishing nets, in which they drown. This happens due to their need to surface for air during which they get tangled in the nets and are unable to get air. Aside from that, climate change consequences have also affected dolphins negatively, hindering their numbers and survival abilities.
Has Any Dolphin Species Gone Extinct
Sadly, yes. The Yangtze River dolphin , also known as the baiji, is considered extinct. These dolphins are the first species of either whales or dolphins to go extinct, and the sole reason, as it is most of the time, is us: humans. The galloping rise in population density and Chinas industrialization has resulted in this sad fact. In 2006, there was an international expedition in search of the Yangtze River dolphins, which lasted for six weeks. It was their goal to track down any remaining individual, but unfortunately, the search was futile.
Read Also: Go.hrw Algebra 1
Deep Dive Into Oceanography
Oceanography is the study of all aspects of the ocean. Oceanography covers a wide range of topics, from marine life and ecosystems to currents and waves, the movement of sediments, and seafloor geology.
5 – 12+
Biology, Ecology, Chemistry, Earth Science, Geology, Oceanography, Geography, Geographic Information Systems , Physical Geography, Social Studies, World History
This lists the logos of programs or partners of NG Education which have provided or contributed the content on this page.Leveled by
Crossing the LineSailors have elaborate rituals and celebrations when they cross the Equator, which they call crossing the line. Sailors who have never crossed the line are called pollywogs. Pollywogs are usually the target of embarrassing practical jokes.
Chart ErrorNautical charts that Christopher Columbus used when he set off from Spain showed nothing but ocean between him and eastern China. That’s why his discovery of the Americas was such a lucky, lucky surprise.
Oceanographers Are In DemandAccording to the Bureau of Labor Statistics, job opportunities for oceanographers and other geoscientists are expected to grow by 18 percent in the next decade. The need for energy, environmental protection, and responsible land and water management will drive the creation of oceanography jobs, mostly in government and the oil industry.
Barrages Bridges Levees And Dams
In Pakistan currently there are six barrages on the Indus: Guddu Barrage, Sukkur Barrage, Kotri Barrage , Taunsa Barrage, Chashma Barrage and Jinnah Barrage. Another new barrage called “Sindh Barrage” is planned as a terminal barrage on the Indus River. There are some bridges on river Indus, such as, Dadu Moro Bridge, Larkana Khairpur Indus River Bridge, Thatta-Sujawal bridge, Jhirk-Mula Katiar bridge and recently planned Kandhkot-Ghotki bridge.
The entire left bank of Indus river in Sind province is protected from river flooding by constructing around 600 km long levees. The right bank side is also leveed from Guddu barrage to Lake Manchar. In response to the levees construction, the river has been aggrading rapidly over the last 20 years leading to breaches upstream of barrages and inundation of large areas.
You May Like: Imagine Math Parent Portal
Geographic Limits Of Brazil
- To the north. French Guiana, Suriname, Guyana, Venezuela and Colombia.
- To the south. Paraguay , Argentina and Uruguay.
- To the East. Atlantic Ocean .
- To West. Peru and Bolivia .
Brazil is made up of 26 states and a federal district that is the capital of the Republic and is called Brasilia. It has an area of 8,511,965 km 2 . Among the most developed cities , São Paulo and Rio de Janeiro stand out.
The Significance Of The Ganges River
Aside from providing drinking water and irrigating fields, the Ganges River is extremely important to India’s Hindu population for religious reasons as well. The Ganges River is considered their most sacred river, and it is worshiped as the goddess Ganga Ma or “Mother Ganges.”
According to the Myth of the Ganges, the goddess Ganga descended from heaven to dwell in the waters of the Ganges River to protect, purify and bring to heaven those who touch it. Devout Hindus visit the river daily to offer flowers and food to Ganga. They also drink the water and bathe in the river to cleanse and purify their sins.
Don’t Miss: Geometry Dash Toe 2
What Are 5 Interesting Facts About Dolphins
15 Fun Facts About Dolphins
- They stick with their mothers for a long time.
- Dolphins have 2 stomachs.
- They dive up to 1,000 feet.
- Dolphins can live up to 50 years!
- There are around 40 species of dolphins.
- Dolphins help the sick or injured members.
- Extremely intelligent animals.
Are Bee Populations Still Declining
Nearly 40% decline in honey bee population last winter unsustainable, experts say. Food prices could rise if the number of bees pollinating crops keeps dwindling. Over the past 15 years, bee colonies have been disappearing in what is known as the colony collapse disorder, according to National Geographic.
Also Check: Span In Linear Algebra
Reproduction And Life Cycle
Dolphin fish grow and mature very quickly. Fish reach maturity between 4 and 5 months of age and start spawning when they reach a length of about 20 centimeters. Spawning occurs throughout the year when water currents are warm. Females spawn two to three times each year, producing 80,000 to a million eggs each time. Pompano dolphin fish have a life span of up to 3 to 4 years, but most live less than 2 years. Mahi-mahi live up to 5 years, but rarely exceed 4 years.
Flora And Fauna Of Brazil
The flora and fauna of Brazil present greater biodiversity than any other country in the world, especially in the Amazon jungle. The scarce human presence in the jungle is essential for the conservation of the species.
The vegetation is very abundant with trees such as maruá, cedar, mahogany, palo violet, pitanga, palm tree, ishpingo and yvirá isí, among others. Also, there are plants like the orchid, the bignonia, the lily and the flower princess. Many of the plant species are fruit-bearing or have leaves for medicinal use.
The diversity of ecosystems is also home to numerous animal species , such as the pink dolphin, the sloth, the marmoset monkey, the green anaconda, the toucan, the macaw, the lizard, the black caiman, the electric eel, the pirarucu and the arrowhead frog, among others.
Recommended Reading: Why Are There Different Branches Of Chemistry