Navigation Links
Gray whales likely survived the Ice Ages by changing their diets
Date:7/6/2011

Gray whales survived many cycles of global cooling and warming over the past few million years, likely by exploiting a more varied diet than they do today, according to a new study by University of California, Berkeley, and Smithsonian Institution paleontologists.

The researchers, who analyzed California gray whale (Eschrichtius robustus) responses to climate change over the past 120,000 years, also found evidence to support the idea that the population of gray whales along the Pacific Coast before the arrival of humans was two to four times today's population, which stands at about 22,000. The whale is considered a conservation success story because protections instituted as early as the 1930s have allowed populations to rebound from fewer than 1,000 individuals in the early 20th century, after less than 75 years of systematic whaling.

"There almost certainly were higher gray whale populations in the past," said evolutionary biologist David Lindberg, a UC Berkeley professor of integrative biology who coauthored the paper with his former student, Nicholas D. Pyenson, now curator of fossil marine mammals at the Smithsonian in Washington, D.C. The paper appears today (Wednesday, July 6) in the online, open-access journal PLoS ONE.

Lindberg and Pyenson suggest that higher populations in the past were possible because gray whales utilized a greater variety of food resources resources that today's whales are only now beginning to exploit. According to Lindberg, gray whales were once thought to feed only by suctioning seafloor sediment and filtering out worms and amphipods so-called benthic organisms. But some whales are now eating herring and krill as well, just like their baleen whale relatives, which include the humpback and the blue.

Some whales are even dropping out of the migratory rat race. One group hangs out year-round off Vancouver Island in Canada, where they chase herring and krill.

"We propose
'/>"/>

Contact: Robert Sanders
rsanders@berkekley.edu
510-643-6998
University of California - Berkeley
Source:Eurekalert

Page: 1 2 3 4 5

Related biology news :

1. Humpback whales catch prey with bubble-nets
2. New discovery -- copepods share divers weight belt technique with whales
3. Marine lab research tracks pollutants in dolphins and beluga whales
4. Record number of whales, krill found in Antarctic bays
5. NOAA scientists find killer whales in Antarctic waters prefer weddell seals over other prey
6. Researchers discover new wintering grounds for humpback whales using sound
7. Fleshing out the life histories of dead whales
8. Researchers find first genetic evidence for loss of teeth in the common ancestor of baleen whales
9. Critically endangered whales flee Russian oil, gas boom
10. Blue whales align the pitch of their songs with extreme accuracy, study finds
11. Lone whales shout to overcome noise
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/4/2015)... N.Y., Aug. 4, 2015  AMRI (NASDAQ: AMRI ) today ... 30, 2015. Highlights: , Second quarter contract ... from 2014 , Adjusted contract margins of ... of $0.22, including a $0.05 decrease in EPS from royalties in ... $16 million "We are very pleased to present ...
(Date:8/3/2015)... Calif. , Aug. 3, 2015 Synaptics, ... human interface solutions, today announced that members of the ... at the Pacific Crest Global Technology Leadership Forum on ... The conference will be held at the Sonnenalp Resort ... The presentation may include forward-looking information. An audio ...
(Date:7/31/2015)... 2015 Den 10. internationale konference om Genomik ... 22. - 25. oktober i Shenzhen ... fødselsdag i år. Siden starten i 2006 er ICB ... ,omik,-feltet, og er en af de mest dynamiske, entusiastiske ... på nylige gennembrud og fremskridt inden for ,omik,-forskning, som ...
Breaking Biology News(10 mins):AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24Den 10. internationale konference om Genomics (ICG-10) åbner i oktober 2
... defect in a DNA repair system might leave some young ... drug, possibly putting them at greater risk of relapse. The ... Children,s Research Hospital scientists. The study,s findings offer ... (ALL) patients who are at higher risk of having their ...
... Nest-building is not just instinctive but is a skill ... filmed male Southern Masked Weaver birds in Botswana as ... breeding season. Their findings contrast with the commonly-held assumption ... The researchers found that individual birds varied their technique ...
... off from its closest relative teosinte, a wild Mexican grass, ... early Mexican farmers. Today it,s hard to tell that the ... on a single sturdy stalk, and produce a handful of ... with scores of thumb-sized "ears," each containing only a dozen ...
Cached Biology News:Newly identified DNA repair defect linked to increased risk of leukemia relapse 2Newly identified DNA repair defect linked to increased risk of leukemia relapse 3Jumping gene enabled key step in corn domestication 2Jumping gene enabled key step in corn domestication 3
(Date:8/4/2015)... ... August 04, 2015 , ... ... pumps and process equipment, announces the appointment of Dennis Rawle as European Director ... industrial industries. Most recently, he was General Manager and Technical Sales Manager for ...
(Date:8/4/2015)... , August 4, 2015 ... Allied Market Research, titled, "World Cardiac Biomarker - ... biomarker market would generate the revenue of $2,085.9 ... from 2015 to 2020. Cardiac Troponins (T, I) ... forecast period due to high sensitivity and specificity. ...
(Date:8/4/2015)... , Aug. 4, 2015 Trigemina, Inc., a ... non-narcotic, nasally delivered, analgesic drug products, announced today that ... the position of chief medical officer. Dr. Kori brings ... much of which has been focused in the neuroscience ... add Dr. Kori to our clinical team given his ...
(Date:8/4/2015)... ... August 04, 2015 , ... RPS Diagnostics ... – today announced that Robert A. Gregg, PhD, has joined RPS as Senior ... years of relevant experience and remarkable achievements in the medical device and diagnostics ...
Breaking Biology Technology:Dennis Rawle Joins Graphite Metallizing Corporation 2Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 2Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 3Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 4Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 5Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 2Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 3RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 2RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 3
... the premier transplant reference and consultative laboratory in the ... Company as Sales Manager. Elliott brings more than a ... industry. At LABS Inc. Elliott will be responsible for ... building national sales and customer support teams. ...
... SG Biofuels , a bioenergy crop company ... Jatropha, today formally launched business operations in Brazil and ... its senior advisor for the market. Reinach ... support for SG Biofuels Brasil, LTD, a subsidiary of ...
... the attractive forces between atoms and surfaces with unprecedented ... could refine our understanding of the structure of atoms ... the journal Physical Review Letters . Van ... physics. However, they are among the weakest known chemical ...
Cached Biology Technology:Kimberly (Lewis) Elliott Joins LABS Inc. as Sales Manager 2SG Biofuels Launches Operations in Brazil; Appoints Fernando Reinach as Senior Advisor 2Physicists take new look at the atom 2Physicists take new look at the atom 3Physicists take new look at the atom 4
Human MFRP MAb (Clone 291218)...
Human RELT/TNFRSF19L MAb (Clone 238104)...
...
... assay kit measures NOS activity by monitoring ... This assay is simple, sensitive, and specific ... with both crude and purified enzyme preparations. ... for 50 total reactions. Radiolabeled arginine and ...
Biology Products: