FASA 2018/1

Plant-eating dinosaurs ‘strayed from veggie diet’

By Helen Briggs BBC News

[1] Duck-billed dinosaurs may have been tempted

away from a vegetarian diet.

The idea of plant-eating dinosaurs having a strict

vegetarian diet has been called into question.

[5] New evidence suggests that some dinosaurs

snacked on shellfish and insects as well as plant

food.

A study of fossilised droppings indicates duck-

billed dinosaurs dined on crabs at certain times of

[10] the year.

Fossil remains of dinosaur dinners is rare, so this

pescatarian diet may have been overlooked in the

past.

The popular perception of what dinosaurs ate was

[15] simplistic, said Dr. Karen Chin of the University of Colorado, Boulder, US, who led the research.

“Plant-eating dinosaurs had more complex diets than we assumed that they had, and these diets included feeding on

some animals, including at least crustaceans, and this was more like diets of modern plant-eating birds”, she told BBC

News.

The new evidence comes from an area of southern Utah that is regarded as a treasure trove of fossils from the Late

[20] Cretaceous Period, when dinosaurs were coming to the end of their reign.

Fossilised dinosaur droppings found on the Kaiparowits Plateau give new insights into what was on the menu for

dinosaurs.

Fragments of shell and other remains show they consumed crustaceans such as crabs, which likely sheltered in

rotting wood.

[25] The dinosaurs probably actively hunted for crustaceans and insects in a “woody stew” rather than swallowing them

accidently, the researchers said.

Animal products may have been a vital source of protein, particularly when they were about to lay their eggs.

Plant guzzlers

“This find really breaks the mould for what we expect a plant-eating dinosaur to do”, said Dr. Steve Brusatte of the

[30] University of Edinburgh, UK, who was not connected with the study.

“We think of them as these multi-tonne plant guzzlers, but some of them also indulged in other types of food.”

“And I guess we shouldn't be too shocked because that's true of many plant eaters today, they'll ingest other stuff,

sometimes accidentally, sometimes to supplement their diet with other nutrients.”

The droppings were left by dinosaurs some 75 million years ago on what would then have been a landscape dotted

[35] with rivers and ponds.

Duckbilled dinosaurs were common in the area at the time. The bones and teeth of the reptiles suggest they spent

most of their time on land, though close to freshwater, feeding on tough plants such as ferns and conifers.

The discovery, detailed in the journal Scientific Reports, suggests other plant-eating dinosaurs may have in fact been

omnivorous.

“We'll just have to find more evidence and we're always on the look out for that”, said Dr. Chin.

Disponível em: http://www.bbc.com/news/science-environment-41341231. Acessed in: 27 september 2017.