A message from nature to muskrats: 'Dont chill out'

San Diego, CA -- Muskrats are mainly vegetarians but will eat animals as well. These small animals consume about one-third of their weight every day. Their digestive system is designed for green vegetation. In the summer they eat the roots of aquatic plants. In the winter, they swim under the surface ice to get to the plants. To the distress of farmers, muskrats also eat agricultural crops.

Since muskrats forage underwater they should exhibit traits that maximize their breath-hold capacity. It is generally acknowledged that an animals dive time is limited by finite on-board oxygen supply and that its aerobic dive limit (ADL) defines the maximum dive duration that can be supported by an oxygen-based metabolism (accessible body oxygen stores divided by the rate at which these stores are depleted underwater). In order to maximize time spent underwater, animals must acquire strategies that enhance their ADL, their capacity for recovery from diving, or their ability to continue diving beyond the ADL (i.e. their capacity for anaerobic metabolism).

One strategy that many assume the muskrat adopts for increased diving time is related to a well-established finding that a drop in temperature reduces rates of cellular reactions (Q10 effect) and this phenomenon may account for the hypometabolic state of cooled tissues. Essentially, this effect depresses metabolism of cooled body tissues, thereby conserving energy. Cooling the body to increase diving time is known as adaptive hypothermia hypothesis.

A depression in diving metabolic rate (DMR) could partially explain the breath-hold capacity of some divers. Calculated DMR based on known body oxygen stores as well as diving patterns and behaviour, has been predicted to be equivalent to, or lower than resting metabolic rates in several penguin species (gentoo, king, emperor), as well as southern elephant seals. Since oxygen affinity of mammalian hemoglobin is typically increased in cold, a reduced sen

Contact: Donna Krupa
American Physiological Society

Page: 1 2 3 4 5

Related biology news :

1. ITA to AMA: Taxing tanning sends wrong health message to teens
2. Gene that prevents tumor growth also carries messages from circadian clock
3. Doctors aware of Tylenol-related liver risk - but is the public getting the message?
4. ESL classes may help deliver public health messages
5. Plants get the message, too
6. Researchers identify distinctive signature for metastatic prostate cancer
7. Entrepreneurs to be told how natures secrets can improve business
8. Forest fire sensor inspired by nature
9. Survival strategies in nature
10. Jefferson researchers develop microchip to track genetic signature of cancer and normal tissue
11. ESAs minature Earth observer put to many uses

Post Your Comments:

(Date:2/26/2020)... ... , ... Renowned eye surgical practice led by Steven J. Dell, MD, ... FDA-approved, post-surgical, corrective Light Adjustable Lens (LAL) by RxSight™. Since offering this technology in ... Consultants is also currently involved in the latest LAL FDA study. , The ...
(Date:2/21/2020)... JOLLA, Calif. (PRWEB) , ... February 21, 2020 , ... ... insight into their future children, was recognized in last year’s annual Inc. 5000 ... Inc. 5000 California list , Gateway Genomics rose to be the 17th fastest-growing private ...
(Date:2/13/2020)... ... ... Murrieta Genomics , the provider of genomics services and a launch pad ... 25th from 11:30 am to 1 pm at the University of California Riverside (UCR) ... attend this free event, but must register in advance . , “This will ...
Breaking Biology News(10 mins):
(Date:2/19/2020)... , ... February 18, 2020 , ... ... devices, today announced the launch of a new and unified global brand identity, ... the industry’s most complex engineering challenges, as well as an enthusiasm for designing ...
(Date:2/11/2020)... ... February 11, 2020 , ... Synagro Technologies, ... America, today announced that the City of Fort Worth has partnered with Synagro ... Commencing in April of 2020, Synagro will assume operation of the city’s current ...
(Date:2/3/2020)... ... February 03, 2020 , ... Ovation ... Law Firm Travel, Technology Industry Travel and Biotech/Healthcare Industry Travel Indexes. , All ... illustrates the following statistics:, Average airfare price paid ...
(Date:1/28/2020)... ... January 28, 2020 , ... Today, Salimetrics ... . The new Salivary Total Human IgG Assay Kit exemplifies Salimetrics’ ... in saliva, researchers can extend the accuracy and ease of use of salivary ...
Breaking Biology Technology:
Cached News: