Navigation Links
The pitch of blue whale songs is declining around the world, scientists discover
Date:12/9/2009

The sound level of songs blue whales sing across the vast expanses of the ocean to attract potential mates has been steadily creeping downward for the past few decades, and a scientist at Scripps Institution of Oceanography at UC San Diego and his colleagues believe the trend may be good news for the population of the endangered marine mammal.

Mark McDonald of WhaleAcoustics in Bellvue, Colo., along with John Hildebrand of Scripps Oceanography and Sarah Mesnick of NOAA Fisheries Southwest Fisheries Science Center studied blue whale song data from around the world and discovered a downward curve in the pitch, or frequency, of the songs. The decline was tracked in blue whales across the globe, from off the Southern California coast to the Indian and Southern Oceans.

"The basic style of singing is the same, the tones are there, but the animal is shifting the frequency down over time. The more recent it is, the lower the frequency the animal is singing in, and we have found that in every song we have data for," said Hildebrand, a professor of oceanography in the Marine Physical Laboratory at Scripps.

The study's results are published in the most recent issue of the journal Endangered Species Research.

The researchers examined a list of possible causes for the frequency dropfrom climate change to a rise in human-produced ocean noiseand believe it may be explained by the increase of blue whale numbers following bans on commercial whaling activities.

While the function of blue whale songs is not known and scientists have much more to learn, they do know that all singers have been determined to be males and that the high-intensity, or loud, and low-frequency songs propagate long distances across the ocean. Blue whales are widely dispersed during the breeding season and it is likely that songs function to advertise which species is singing and the location of the singing whale.

In the heyday of commercial
'/>"/>

Contact: Mario Aguilera
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Perfect pitch in humans far more prevalent than expected
2. Study finds pitching mound height affects throwing motion, injury risk
3. Carnivorous plants use pitchers of slimy saliva to catch their prey
4. Rocket science leads to new whale discovery
5. Getting a leg up on whale and dolphin evolution
6. New species discovered on whale skeletons
7. Bycatch whaling a growing threat to coastal whales
8. NOAA researchers: Blue whales re-establishing former migration patterns
9. UIC biologists use DNA to study migration of threatened whale sharks
10. Right whale sedation enables disentanglement effort
11. Mama whales teach babies where to eat
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The pitch of blue whale songs is declining around the world, scientists discover
(Date:8/27/2014)... have shown that excessive iron is closely ... Previous studies from Chunyan Guo and co-workers ... shown that baicalin prevented iron accumulation after ... 1 expression, and increased ferroportin 1 expression ... disease rats. However, the relationship between iron ...
(Date:8/27/2014)... As of seven hours ago the Happy Camp Complex ... Northern California, the July complex had consumed 35,530 as ... seventeen fires on the Happy Camp Ranger District of ... the area on August 11, 2014. All but three ... following is a list of contained fires and their ...
(Date:8/27/2014)... Researchers from North Carolina State University have found that century-old ... affect a common insect pest that can weaken and kill ... studies found that scale insect populations increase on oak and ... that these pests may also increase with global warming," says ... lead author of a paper on the work. , "More ...
Breaking Biology News(10 mins):Happy Camp and July Fire Complexes in California 2Museum specimens, modern cities show how an insect pest will respond to climate change 2
... cells are encased within a protective lipid membrane. The ... that transport nutrients, ions, and water into and out ... recognize each other in the body, and make the ... mapped out nearly all of the membrane proteins in ...
... must be standardized among laboratories and across platforms around ... exploration, an Oregon Health & Science University researcher says. ... gene chips, risk having their research results called into ... the OHSU School of Medicine. , Spencer, director of ...
... development requires billions of neurons to migrate to the appropriate ... connect to other nerve cells in an intricate network. Growth ... for steering axons in the right direction, guided by a ... way. Some signals lure the axons to extend and grow ...
Cached Biology News:Study: 'homemade' gene expression technology unreliable 2Study: 'homemade' gene expression technology unreliable 3Cerebral navigation: How do nerve fibers know what direction to grow in? 2
(Date:8/27/2014)... OR (PRWEB) August 27, 2014 According ... “Consolidation continues to reshape the look and feel of ... Consumer demand for higher-quality ingredients will push for more ... American market have experienced strong market growth in the ... attributes in their food and cosmetics to fit a ...
(Date:8/26/2014)... the thinnest-possible semiconductor, a new class of nanoscale ... , The University of Washington researchers have demonstrated ... be connected in an atomically seamless fashion known ... basis for next-generation flexible and transparent computing, better ... "Heterojunctions are fundamental elements of electronic and photonic ...
(Date:8/26/2014)... MA (PRWEB) August 26, 2014 The ... Faces of ALS (YFALS) community issued the following statement ... movement bringing awareness and driving new funding specifically for ... bucket of water and some ice would raise all ... together with our families, and on behalf of the ...
(Date:8/26/2014)... An analysis by Replikins, Ltd. of Pubmed ... strains in Pubmed, has revealed extensive conservation and sharing ... and sharing of specific Replikin gene structures has permitted ... it did for the H5N1 influenza vaccine and the ... found to be effective (1,2). This ...
Breaking Biology Technology:Daring to be Different Raw Materials & Ingredient Supply Shortage Fuels Vital Force™ Technology New Ingredient Enhancements 2Daring to be Different Raw Materials & Ingredient Supply Shortage Fuels Vital Force™ Technology New Ingredient Enhancements 3Scientists craft atomically seamless, thinnest-possible semiconductor junctions 2ALS TDI’s Young Faces of ALS Ambassadors Thank You for Accepting the Ice Bucket Challenge to End ALS 2ALS TDI’s Young Faces of ALS Ambassadors Thank You for Accepting the Ice Bucket Challenge to End ALS 3ALS TDI’s Young Faces of ALS Ambassadors Thank You for Accepting the Ice Bucket Challenge to End ALS 4
... April 15 ,BioHorizons, Inc. ("BioHorizons") announced today the ... ("ILS"), first announced on January,30, 2008. Implant Logic ... Boggan, CEO of BioHorizons, commented, "We are excited,to ... Implant Placement,planning software and CAD/CAM surgical guides. This ...
... Pain-Management Market ... ... Inc. (NYSE: AOB ), a leading marketer, distributor and,manufacturer ... Company, Inc. (OTC Bulletin Board: CAXG) ("China,Aoxing"), a China-based pharmaceutical ...
... Designs Comforting Environment for Patients and Families, ... Medical,Center celebrates the opening of two new health ... treatment options for,life-threatening illnesses and to offer health ... seamless delivery of screening and,diagnostic procedures, all in ...
Cached Biology Technology:BioHorizons Announces the Purchase of Implant Logic Systems 2American Oriental Bioengineering and China Aoxing Pharmaceutical Enter Into Strategic Alliance 2American Oriental Bioengineering and China Aoxing Pharmaceutical Enter Into Strategic Alliance 3American Oriental Bioengineering and China Aoxing Pharmaceutical Enter Into Strategic Alliance 4Alta Bates Summit Medical Center Opens Two Warm, Supportive Patient Centers: Carol Ann Read Breast Health Center and Family Resource Center 2Alta Bates Summit Medical Center Opens Two Warm, Supportive Patient Centers: Carol Ann Read Breast Health Center and Family Resource Center 3
Anti-gamma Glutamyl Transferase (gammaGT) Host: mouse monoclonal Species Reactivity: human Applications: WB, IP, FC Storage: 4C...
... Goat polyclonal to Cholesterol Oxidase ... / Specificity Cross-reacts with bacteria. Not ... Information Cholesterol oxidases exist as both ... are implicated in bacterial pathogenesis. In addition, ...
Goat polyclonal to XAGE1 ( Abpromise for all tested applications). Antigen: Synthetic peptide: CGFGFRRQGEDNT, corresponding to C terminal amino acids 149-160 of Human XAGE1 Entrez Gene ID: 9...
MDMA Mouse Monoclonal Antibody (Clone 3G8)...
Biology Products: