Svelte porpoises eat twice as much as humans to cope with the

first_imgPeter Verhoog/Minden Pictures Country * Afghanistan Aland Islands Albania Algeria Andorra Angola Anguilla Antarctica Antigua and Barbuda Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belarus Belgium Belize Benin Bermuda Bhutan Bolivia, Plurinational State of Bonaire, Sint Eustatius and Saba Bosnia and Herzegovina Botswana Bouvet Island Brazil British Indian Ocean Territory Brunei Darussalam Bulgaria Burkina Faso Burundi Cambodia Cameroon Canada Cape Verde Cayman Islands Central African Republic Chad Chile China Christmas Island Cocos (Keeling) Islands Colombia Comoros Congo Congo, the Democratic Republic of the Cook Islands Costa Rica Cote d’Ivoire Croatia Cuba Curaçao Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Equatorial Guinea Eritrea Estonia Ethiopia Falkland Islands (Malvinas) Faroe Islands Fiji Finland France French Guiana French Polynesia French Southern Territories Gabon Gambia Georgia Germany Ghana Gibraltar Greece Greenland Grenada Guadeloupe Guatemala Guernsey Guinea Guinea-Bissau Guyana Haiti Heard Island and McDonald Islands Holy See (Vatican City State) Honduras Hungary Iceland India Indonesia Iran, Islamic Republic of Iraq Ireland Isle of Man Israel Italy Jamaica Japan Jersey Jordan Kazakhstan Kenya Kiribati Korea, Democratic People’s Republic of Korea, Republic of Kuwait Kyrgyzstan Lao People’s Democratic Republic Latvia Lebanon Lesotho Liberia Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao Macedonia, the former Yugoslav Republic of Madagascar Malawi Malaysia Maldives Mali Malta Martinique Mauritania Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Morocco Mozambique Myanmar Namibia Nauru Nepal Netherlands New Caledonia New Zealand Nicaragua Niger Nigeria Niue Norfolk Island Norway Oman Pakistan Palestine Panama Papua New Guinea Paraguay Peru Philippines Pitcairn Poland Portugal Qatar Reunion Romania Russian Federation Rwanda Saint Barthélemy Saint Helena, Ascension and Tristan da Cunha Saint Kitts and Nevis Saint Lucia Saint Martin (French part) Saint Pierre and Miquelon Saint Vincent and the Grenadines Samoa San Marino Sao Tome and Principe Saudi Arabia Senegal Serbia Seychelles Sierra Leone Singapore Sint Maarten (Dutch part) Slovakia Slovenia Solomon Islands Somalia South Africa South Georgia and the South Sandwich Islands South Sudan Spain Sri Lanka Sudan Suriname Svalbard and Jan Mayen Swaziland Sweden Switzerland Syrian Arab Republic Taiwan Tajikistan Tanzania, United Republic of Thailand Timor-Leste Togo Tokelau Tonga Trinidad and Tobago Tunisia Turkey Turkmenistan Turks and Caicos Islands Tuvalu Uganda Ukraine United Arab Emirates United Kingdom United States Uruguay Uzbekistan Vanuatu Venezuela, Bolivarian Republic of Vietnam Virgin Islands, British Wallis and Futuna Western Sahara Yemen Zambia Zimbabwe Harbor porpoises should be the envy of any dieter. That’s because they eat a tremendous amount given their relatively small size, the equivalent of a 55-kilogram person. Their secret, according to a new study, is very high metabolic rates that let them burn more than twice as many calories per day than the average human. They need all this food to keep themselves from freezing to death in frigid arctic waters. Although that might not help dieting humans, it could help biologists better understand what these animals need to thrive.For years, biologists have argued over whether porpoises (above) have high metabolic rates. Sea otters and seals, other small mammals that spend much of their life in water, burn energy far faster than their land-lubber relatives. But data on porpoises were mixed, with some suggesting their metabolic rate was not that high, after all.So, researchers monitored the food intake and activity of three captive harbor porpoises (Phocoena phocoena) for 3 years. They measured the animals’ breathing, determined how much of their fish diet was turned into blubber, and calculated how much energy they use up per breath. Svelte porpoises eat twice as much as humans to cope with the cold Sign up for our daily newsletter Get more great content like this delivered right to you! Country By Elizabeth PennisiDec. 6, 2018 , 6:00 PM Click to view the privacy policy. Required fields are indicated by an asterisk (*) Email Then, they monitored the movements and sounds made by 13 wild porpoises, which they tagged and tracked from 2012 to 2016. By listening to the porpoises’ breathing, they could calculate respiration rates—and used the captive porpoise energy use rate to determine how many calories they were burning.The animals took about three breaths per minute, and fewer in the summer, translating into an average burn of about 4300 calories per day, the researchers report today in the Journal of Experimental Biology. (Humans burn about 2000 calories a day.) Porpoises put on a lot of blubber in the summer, they add, likely helping them survive the winter in water that could kill a human in 15 minutes flat. Now we know why they never get fat.last_img read more

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