• what was the diet of early whales? course hero

What do whales eat?

What was the diet of early whales? became carnivores Be able to recognize the early whales and relatives (hint for some: Greek for whale) Indohyus 50 mya Pakicetus 48 mya Ambulocetus 45 mya Dorudon 40 mya Basilosaurus 38 mya Be able to recognize bird synapomorphies: feathers, keratin beak, wings, forelimb, hollow bones, endothermy, high metabolic rate, large heart, …

How do blue whales get their food?

The Dorudon is the final stage in whale evolution, it represents a modern dolphin. It was about 16 feet long, weighing half a ton. and it ws muscular in size. It lived in the late Eocene 41-31 million years ago. Their diet consisted of fish and mollusks. 60 meter sharks were the whales predator although, with the sense and smallness of the whale it was easy to get away.

How do baleen whales hunt for food?

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Why do gray whales eat from the bottom of the ocean?

What Was The Diet Of Early Whales? Course Hero, Great Value Cream Of Mushroom Soup Nutrition, Nutritional Value Of A Celery Root Ball, Mariposa Bakery Nutrition Facts

What did the first whale eat?

Odd as it may seem, a four-footed land mammal named Pakicetus, living some 50 million years ago in what we know as Pakistan today, bears the title of “first whale.” Straddling the two worlds of land and sea, the wolf-sized animal was a meat eater that sometimes ate fish, according to chemical evidence.Aug 7, 2013

How did whale ancestors begin living full time in the water?

When did whale ancestors begin living full time in the water? After they nursed under water. Whales are tetrapods but living whales do not have four limbs.

Which fossil organism and whale evolution was the first to live mostly in water?

Ambulocetus natans was first thought to have spent most of its life in the water, but still capable of walking on land. However, more recent research suggests that it was likely fully aquatic. Fossils for this prehistoric whale come from the early Eocene approximately 49 million years ago.Apr 8, 2019

What did whales eat on land?

When whales walked on four legsAlthough whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. ... It hunted small land animals and freshwater fish, and could even hear underwater.More items...

Did whales have legs?

Over time, as they evolved to dwell in water, their front legs became flippers while they lost their back legs and hips, although modern whales all still retain traces of pelvises, and occasionally throwbacks are born with vestiges of hind limbs.Sep 11, 2008

What is the goal of the Tree of Life quizlet?

The goal of cladistics is to is to place species on a branching-tree diagram in the order of which they descend from a common ancestor.

What evolved from whales?

Modern-day ungulates include hippopotamus, giraffe, deer, pig and cow. Unlike the hippo's ancestor, whale ancestors moved to the sea and evolved into swimming creatures over a period of about 8 million years.

How did scientists use fossils to solve the mystery of whale evolution?

Starting in the late 1970s, a growing number of fossils have allowed scientists to piece together the story of whale evolution. The fossils represent ancient, whale-like animals. They show that an ancient land mammal made its way back to the sea more than 50 million years ago. It became the ancestor of modern whales.Feb 29, 2012

How did whales evolve for kids?

2:395:03Evolution Of Whales - The Dr. Binocs Show | Best Learning Videos For KidsYouTubeStart of suggested clipEnd of suggested clipThey have a hole on top of their heads. And it's called a blowhole blow holes are surrounded byMoreThey have a hole on top of their heads. And it's called a blowhole blow holes are surrounded by protective muscles and they only open it when whales are at the surface. And needs to breathe.

What do whales eat?

The majority of toothed whales will eat whale food species such as squid, octopus, crustaceans and fish. Other toothed whales, such as the killer whale, will hunt bigger marine mammals including whale food such as seals, sharks, birds, and even other whales.Jan 25, 2018

How did whales lose their legs?

In findings to be published this week in the Proceedings of the National Academy of Sciences, scientists say the gradual shrinkage of the whales' hind limbs over 15 million years was the result of slowly accumulated genetic changes that influenced the size of the limbs and that these changes happened sometime late in ...May 23, 2006

Do whales hair?

Believe it or not, whales do have hair, although it's only visible in some species. One of those is the humpback whale. The golfball-sized lumps you see on a humpback's head each house a hair follicle. Fin, sei, right and bowhead whales also have hair follicles.Jan 14, 2017

What do whales eat?

Toothed whales also consume small prey; however, some species have a larger, more diverse diet and can consume larger food sources: 1 Fish 2 Squid (sperm whales hunt giant squid) 3 Octopus 4 Crabs 5 Marine mammals such as whales, dolphins, and porpoises (eaten by certain groups of killer whales) 6 Other marine animals, including seals, sea lions, walruses, seabirds, and sharks (eaten by certain groups of killer whales)

What do killer whales eat?

Killer whales eat a large variety of foods such as fish, squid, sea lions, walruses, seals, sharks, and even large whales. Moreover, they are considered to be at the top of the aquatic food chain ...

Why are toothed whales considered active hunters?

Toothed whales are referred to as active hunters because they possess teeth. In fact, some toothed whales are known to hunt and eat larger forms of prey than their baleen whale relatives.

What is the function of echolocation in whales?

Echolocation works by emitting a series of clicking and busing noises and then listening to the echoes that bounce off objects in the area ( such as fish or other aquatic life forms). The amount of time it takes the echo to return to the whale can provide these marine mammals ...

How much do gray whales eat?

These whales will eat everything that comes up from crabs and larvae to plankton and small fish. Gray whales are enormous and can consume more than 3,000 pounds of food daily. Some observers state that the gray whale can eat more than 4,500 pounds of food daily.

What do orcas eat?

The sperm whale (the largest of the toothed whales) typically prefers a diet containing octopus, large squid, and some fish.

What are some examples of toothed whales?

Dolphins are often a good example of toothed whales that hunt together. Numerous dolphin species may be found hunting for food in layers as they swim through the water picking off potential prey. By swimming in layers, they can prevent some of their prey from swimming up or down to avoid being attacked.

Blue whale diets

Blue whales are the largest animals ever to have lived. These colossal cetaceans often reach 30 metres in length and can weigh up to 180 tonnes - so they need to eat a lot to keep them swimming.

Which whales have teeth?

Odontocete whales have traditional teeth. This means their feeding techniques and preferred foods are different from the Mysticeti.

What do killer whales eat?

Killer whales, the largest dolphin species, also have teeth, but their diet is different to other odontocetes.

An ocean of plastic

Plastic in the oceans poses an enormous threat as whales can become entangled in it or mistakenly swallow it.