HOME >> BIOLOGY >> NEWS
Unlike other mammals, newborn dolphins and orcas stay active 24/7 during first months of development

If you thought the sleep-deprived months with your newborn were tough, pity the poor mother dolphin or killer whale.

Reporting in the June 30 edition of the peer-reviewed journal Nature, UCLA/Veterans Affairs neuroscientists report a developmental pattern in bottlenose dolphins and killer whales that is unique from other mammals, with calves of both species active 24 hours a day during their first month.

The mother also has minimal sleep during this period, but unlike all other mammals always manages more sleep than her busy newborns. The newborns and mothers gradually increase sleep over a period of months until they reach normal adult levels. As the newborns grow, neither mothers nor offspring show counterbalancing increases in rest that would indicate accumulated sleepiness.

All mammals previously studied have maximum rest or sleep behavior at birth with amounts gradually decreasing to adult levels. In fact, past findings that sleep deprivation for two to three weeks can be lethal in rats and flies has led to the belief that sleep is critical for the development of brain and body and serves a vital function in adults.

The ability to remain active and responsive after birth has several apparent advantages for newborn cetaceans: Movement and wakefulness reduce danger from predators, help maintain body temperature until mass and blubber insulation develop, allow frequent respiration at the surface, and facilitate rapid growth of brain and body and related behavioral development.

"Somehow these seafaring mammals have found a way to cope with sleep deprivation, facilitating rather than hindering a crucial phase of development for their offspring," said Dr. Jerome Siegel, professor-in-residence at the Semel Institute for Neuroscience and Human Behavior at UCLA and chief of neurobiology research at the VA Greater Los Angeles Healthcare System, Sepulveda. "Their bodies have found a way to cope, offering evidence that sleep isn't ne
'"/>

Contact: Dan Page
dpage@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
29-Jun-2005


Page: 1 2

Related biology news :

1. Study finds gender differences in renal and other genes contributing to blood pressure
2. Pregnant mothers join search for causes of autism
3. 47th Interscience Conference on Antimicrobial Agents and Chemotherapy
4. Innovative research technique reveals another natural wonder in Yellowstone Park
5. Mother-of-pearl -- Classic beauty and remarkable strength
6. The fisherman is a predator like any other
7. Nanoparticles carry chemotherapy drug deeper into solid tumors
8. A faster way to recover from chemotherapy and marrow transplant
9. Another sexual attraction is possible ...
10. Study suggests other causes for childhood brain aneurysms
11. Sensitivity to diverse range of chemotherapeutic drugs linked to common pathway

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/14/2019)... ... January 14, 2019 , ... CellMax ... cancer cells in blood, will present new findings at the ASCO Gastrointestinal Cancer ... colorectal cancer. The results from this study show CellMax Life’s blood test, based ...
(Date:1/10/2019)... (PRWEB) , ... January 09, 2019 , ... Dr. Beanlands ... Heart Institute in Ottawa, Ontario, Canada. He is also Director of its National ... of Medicine, in the Department of Radiology, and in the Department of Cellular and ...
(Date:1/10/2019)... ... 2019 , ... A major goal for pharmaceutical companies has ... significantly more expensive in vivo studies in order to reduce costs and improve ... researchers have begun to adopt 3D cell culture models which have been shown ...
Breaking Biology News(10 mins):
(Date:12/20/2018)... ... December 20, 2018 , ... New Year’s brings reflection ... changes in regulations in the European Union (EU) on the horizon, Jim Kasic, president ... , “The transition to the EU Medical Device Regulation (MDR), digital health, and big ...
(Date:12/18/2018)... ... December 18, 2018 , ... Patients with early stages of breast cancer who ... post-treatment versus whole breast irradiation, a new study suggests. , Patients with early stage ... irradiation after removal of the cancerous tumor because there is a 30 to 40 ...
(Date:12/13/2018)... ... December 13, 2018 , ... Microbial Discovery Group LLC (MDG) ... been part of their strategic plan and an important milestone in increasing their ... opportunities for MDG within the $44 Billion human probiotic market. This plan is ...
(Date:12/5/2018)... (PRWEB) , ... December 04, ... ... an established North American full-service contract research organization (CRO), announced the acquisition ... transaction significantly strengthens ARG’s reach and experience in the management of clinical ...
Breaking Biology Technology:
Cached News: