SUBSCRIBE TO MY YOUTUBE CHANNEL & HELP SUPPORT BATS

Antarctic Killer Whales May Seek Spa-Like Relief in the Tropics

Pod of killer whales. (Credit: © pr2is / Fotolia) (Oct. 26, 2011)  — NOAA researchers offer a novel explanation for why a type o...




Pod of killer whales. (Credit: © pr2is / Fotolia)
(Oct. 26, 2011) — NOAA researchers offer a novel explanation for why a type of Antarctic killer whale performs a rapid migration to warmer tropical waters. Scientists believe that warmer waters help the whales regenerate skin faster, after spending months coated with algae in colder waters.
"The whales are traveling so quickly, and in such a consistent track, that it is unlikely they are foraging for food or giving birth," said John Durban, lead author from NOAA's Southwest Fisheries Science Center in La Jolla, California. "We believe these movements are likely undertaken to help the whales regenerate skin tissue in a warmer environment with less heat loss."
As evidence, the researchers point to the yellowish coating on Antarctic killer whales caused by a thick accumulation of diatoms or algae on the outer skin of the animals. The coloring is noticeably absent when they return from warmer waters indicating the upper epidermis of the skin has been shed.
One tagged Antarctic killer whale monitored by satellite traveled over 5,000 miles to visit the warm waters off southern Brazil before returning immediately to Antarctica just 42 days later. This was the first long distance migration ever reported for killer whales.
The coloring is noticeably absent when they return from warmer waters indicating the upper layer of skin has been shed. The scientists tagged 12 Type B killer whales (seal-feeding specialists) near the Antarctic Peninsula and tracked 5 that revealed consistent movement to sub-tropical waters. The whales tended to slow in the warmest waters although there was no obvious interruption in swim speed or direction to indicate calving or prolonged feeding.
"They went to the edge of the tropics at high speed, turned around and came straight back to Antarctica, at the onset of winter," said Robert Pitman, co-author of the study. "The standard feeding or breeding migration does not seem to apply here."
Researchers believe there are at least three different types of killer whales in Antarctica and have labeled them Types A, B and C.
WildLife Rules! Help Save WildLife
Name

aggag,14,Backyard,28,Barbed Wire,2,Birds,69,Bob Irwin,9,Books,2,Butterflies,8,cat,11,Cats-Big,8,commercial animals,23,Crocodile,1,Dingoes,7,Echidna,3,Elephant,2,Events,6,Frog,3,Insects,10,introduced species,19,Kangaroo,30,Koala,19,MISC,26,monkey,15,NewsLetters,3,Ocean,32,Pics,10,polls,2,possum,22,Promoting,42,Quotes,17,Rehab,27,Reptiles,22,Rescue,9,SeaSepherd,3,Spiders,5,Vegetation,22,Video,116,WebSites-wildlife,33,Whales,20,Wildlife Issues,89,Wombat,3,
ltr
item
WildLife_Rules!: Antarctic Killer Whales May Seek Spa-Like Relief in the Tropics
Antarctic Killer Whales May Seek Spa-Like Relief in the Tropics
http://2.bp.blogspot.com/-ejZw3d6jopI/T9YyHXXi-cI/AAAAAAAAAig/MDCuSnNO0qA/s320/111026113824-large.jpg
http://2.bp.blogspot.com/-ejZw3d6jopI/T9YyHXXi-cI/AAAAAAAAAig/MDCuSnNO0qA/s72-c/111026113824-large.jpg
WildLife_Rules!
http://www.wildliferules-helpsavewildlife.info/2011/10/antarctic-killer-whales-may-seek-spa.html
http://www.wildliferules-helpsavewildlife.info/
http://www.wildliferules-helpsavewildlife.info/
http://www.wildliferules-helpsavewildlife.info/2011/10/antarctic-killer-whales-may-seek-spa.html
true
8714048168060258218
UTF-8
Loaded All Posts Not found any posts VIEW ALL Readmore Reply Cancel reply Delete By Home PAGES POSTS View All RECOMMENDED FOR YOU LABEL ARCHIVE SEARCH ALL POSTS Not found any post match with your request Back Home Sunday Monday Tuesday Wednesday Thursday Friday Saturday Sun Mon Tue Wed Thu Fri Sat January February March April May June July August September October November December Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec just now 1 minute ago $$1$$ minutes ago 1 hour ago $$1$$ hours ago Yesterday $$1$$ days ago $$1$$ weeks ago more than 5 weeks ago Followers Follow THIS CONTENT IS PREMIUM Please share to unlock Copy All Code Select All Code All codes were copied to your clipboard Can not copy the codes / texts, please press [CTRL]+[C] (or CMD+C with Mac) to copy