What are ventral grooves of Rorquals and what is their purpose?

What are ventral grooves of Rorquals and what is their purpose?

These grooves are called ventral pleats, and they allow the throat cavity to expand many times its normal size. This is an important feature in the filter feeding strategy of this baleen whale.

What are throat grooves on a whale?

Humpback whales have 14-35 throat grooves that run from the chin to the navel. These grooves allow their throat to expand during the huge intake of water during filter feeding. They have small, round bumps on the front of the head (called knobs or tubercles), edging the jaws.

What is it called when whales come up for air?

As whales reach the water surface to breathe, they forcefully expel air through the blowhole. This spray, known as the blow, is often visible from far away as a white splash, which can also be caused by water resting on top of the blowhole.

How do Rorquals differ from gray whales and right whales?

Rorquals are slender and streamlined in shape, compared with their relatives the right whales, and most have narrow, elongated flippers. They have a dorsal fin, situated about two-thirds the way back.

Is Humphrey the whale alive?

The Marine Mammal Center confirmed a dead whale was found partially submerged under a bridge in the Oakland Estuary and are currently working to figure out how it died. One of the members of the flotilla says Humphrey stayed very close, even eating barnicles off the hull of the boat.

Why do whales have lines on their belly?

Broad and stretchable grooves extend along the humpback’s underside from the throat to the navel. These grooves allow the whale to hold, in a single mouthful, thousands of litres of water teeming with krill and small fish.

Where does the drapery go on a pleat panel?

The Rod-Pocket Pleat, also know as a “Pole-Pocket” is a pleat where a pocket is formed at the top of the drapery panel. The drapery rod is then inserted through pocket. Drapery pins are not used on a rod-pocket panel.

What kind of pleat do you use at drapestyle?

At DrapeStyle, we use a Patent Pending Device which is inserted into the Cartridge Pleat to keep the form of the pleat neat and uniform. At DrapeStyle we offer two versions of the Inverted Pleat. The classic Inverted Pleat features a neat and tailored style with a 5-inch pleat.

Which is the best definition of the word Pleat?

transitive verb. 1 : fold especially : to arrange in pleats pleat a skirt. 2 : plait sense 2. pleat. noun. Definition of pleat (Entry 2 of 2) : a fold in cloth made by doubling material over on itself also : something resembling such a fold.

What’s the difference between French Pleat and Parisian Pleat?

The Parisian Pleat is similar to the French Pleat but on the Parisian Pleat the Pleat is “Tacked’ at the top of the “flute”. The Parisian Pleat is also hung using pre-installed drapery hooks.