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|CANBERRA Malcolm Butler Jersey , Nov. 10 (Xinhua) -- A common species of Australian pigeon uses the sound of its feathers to warn of impending danger, a local study has found.
Researchers from the Australian National University (ANU) found that rather than using vocals, the crested pigeon uses a high-pitched sound produced by its main flight feathers to warn fellow pigeons of predators.
As the pigeon flaps faster to escape danger, the tempo of the alarm signal automatically increases.
Trevor Murray, an animal communication expert from ANU Brynden Trawick Jersey , said on Friday that the team is able to prove that other crested pigeons flee when they hear the warning, proving it is used specifically as an alarm rather than a by-product of flight.
"Crested pigeons signal danger with noisy wings, not voices," Murray said in an ANU media release.
"It shows that birds really can use their feathers as 'musical instruments' to communicate with others."
In order to prove that the pigeon's whistling feather was an alarm system, researchers used high-speed video and conducted feather-removal studies.
They found that the bird's eighth primary wing feather was responsible for the high-pitched notes with each downstroke.
It was also discovered that the ninth feather produces a low-pitched sound that it was not involved in the alarm.
Researchers played flight sounds of crested pigeons with and without their eighth feather to a flock of other pigeons.
"We show that the crested pigeon produces an acoustic alarm signal with its wings and that it is an intrinsically reliable signal of danger Harold Landry Jersey ," Murray said.
"The alarm signal is intrinsically reliable because pigeons flap faster to escape predators, and this fast flapping automatically produces the high-tempo alarm signal."
Depending on the entry to the pallet, different principles apply.
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The use of pallets has been instituted for any following purposes:
•?????? Storage space of goods (i. e. warehouse, shed, stockyard)
•?????? Safe transportation
•?????? To meet Foodstuff safety standards
•?????? Stacking purposes
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Pallets are also treated to withstand weather conditions as they are used in outdoor storage yards.
Transportation and shipping standards have enforced the use of pallets especially in value to food companies. Shipping products is made easier with pallets as is that mobility of products that otherwise may be too heavy to lift up. When it comes to international shipments, pallets ought to be specially treated to fulfill the specifications of the International Standards For Phytosanitary Measures No. 15 (ISPM 15) coping with possible transport of disorders, insects, plants or some other infectious materials from other countries during transport.
In order in order to reach food safety standards with regard to storage of goods Marcus Mariota Jersey , food companies must raise their products heli-copter flight floor. This can be achieved with the use of pallets. Used in foodstuff warehouses, freezers, and manufacturing lines, pallets are an integral part of the food service market. They are also needed for safe food shipments.
The usage of pallets has also allowed for the safe stacking of item. Because the pallets are uniform, balancing is a painless task as is finding ample storage space for merchandise. Forklift operators can potentially take pallets and stack them in an orderly fashion Kevin Byard Titans Jersey , organize them and free up space for other product consequently. Pallets also allow for storage within other containers which include shelving units, racks and other sealed storage units.
When picking out a pallet company, be sure to analyze the company’s policies with repairs, safety standards and recycling programs for old pallets. As i used to own two retail stores, I would usually drive from North park to LA Derrick Henry Titans Jersey , every Thurs, and pick up 8 pallets of merchandise for my shops. My truck would only hold 8 pallets, and That i came back with the full load.
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