Navigation Links
Overfishing may drive endangered seabird to rely upon lower quality food

rs compared these historic samples with feathers they collected between 1998 and 2002 from 201 murrelets in the same region. The researchers had records of when and where all the feathers they sampled were obtained.

Measures of stable carbon and nitrogen isotopes ?derived from food ingested at the time the birds create feathers and preserved into the feathers ?give clues to the birds' diet. More nutritious food items, such as sardines, anchovies and squid, are distinguished in the feathers by higher levels of nitrogen isotopes. Less valuable food sources, including marine invertebrates such as krill, are signaled by greater levels of carbon isotopes.

"It takes about 70 to 80 krill to equal the energy value of one sardine," said Beissinger. "When murrelets have to rely upon less nutritious foods, they need to spend more time diving underwater to catch and eat them, and have less energy to make and lay eggs. The availability of food commonly affects the reproductive success of seabirds."

The researchers were able to determine the time of year that individual feathers were grown. They pointed out that murrelets undergo two molts of feathers each year, one right before the onset of the March through April breeding season, and another after their nesting period ends between August and September. Brown-tipped breast feathers are only lost in the pre-breeding period, while all-white breast feathers and wing feathers are lost in the post-breeding period.

The researchers were thus able to relate the diet of the murrelet to the environmental and fishing conditions at the time the feather was created. "In this paper, we're trying to tease apart climate signals from human fishing impacts," said Ben Becker, the study's lead author. Becker was a UC Berkeley Ph.D. student at the time of the study and is now director and marine ecologist at the Pacific Coast Science and Learning Center at the Point Reyes National Seashore.

The research team f
'"/>

Source:University of California - Berkeley


Page: 1 2 3 4 5

Related biology news :

1. Overfishing in inland waters reduces biodiversity and threatens health
2. Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply
3. Scientists identify molecular events that drive cell senescence
4. Loves all in the brain: fMRI study shows strong, lateralized reward, not sex, drive
5. Unchecked DNA replication drives earliest steps toward cancer
6. Pair of cancer genes found to drive both cell migration and division
7. Random gene expression may drive HIV into hiding
8. Gap-climbing fruit flies reveal components of goal-driven behaviors
9. Once given no respect, cells tiny RNAS take drivers seat
10. Picky female frogs drive evolution of new species in less than 8,000 years
11. Climate change drives widespread amphibian extinctions
Post Your Comments:
(Date:7/31/2014)... Fire was in full fury, raging swiftly from crown ... backcountry of Yosemite National Park in California,s Sierra Nevada ... battle began to turn, enacting a case study in ... fuel large, severe fires. , "When the Rim Fire ... had been used as a management tool, rather than ...
(Date:7/31/2014)... familiar with Hibiscus flowers- they are an iconic ... commonly planted in the landscape. Some, like Hawaii,s ... species. , Only a relatively few botanists and ... equally beautiful and intriguing related group of plants ... Hibiscus". , Brother of Hibiscus species are in ...
(Date:7/31/2014)... White, brown and beige adipocytes, or fat cells, are ... functions and each plays its own role in metabolism. ... far the most prevalent. Its primary function is energy ... energy to generate heat but are only found in ... adipocytes, which represent a special type of brown adipocytes, ...
Breaking Biology News(10 mins):The Rim Fire 1 year later: A natural experiment in fire ecology and management 2The Rim Fire 1 year later: A natural experiment in fire ecology and management 3The Rim Fire 1 year later: A natural experiment in fire ecology and management 4The Rim Fire 1 year later: A natural experiment in fire ecology and management 5Brother of Hibiscus is found alive and well on Maui 2Hope for the overweight 2
... Conservation Society's New York Aquarium received the ultimate honor ... island nation of Madagascar was named after him. , ... career safeguarding Madagascar's little- known freshwater fishes, received the ... Museum of Natural History (AMNH), after they named a ...
... Researchers at Johns Hopkins have discovered to their surprise ... can also block angiogenesis, the growth of new blood ... is FDA approved for human use, which may fast-track ... mice induced to have excess blood vessel growth, treatment ...
... corn grain is diverted to make ethanol, there have ... from cellulosic materials instead of corn grain, renders the ... a Michigan State University ethanol expert. , Bruce Dale, ... used life cycle analysis tools, which include agricultural data ...
Cached Biology News:Anti-fungal drug stops blood vessel growth 2With cellulosic ethanol, there is no food vs. fuel debate according to MSU scientist 2
(Date:7/31/2014)... July 31, 2014 According to ... "Electrodes for Medical Devices Market (Diagnostic Electrodes - ECG, ... - TENS, Pacemakers, Defibrillators, Electrosurgical and Other Electrodes) - ... 2013 - 2019," the global electrodes market for medical ... and is estimated to reach a market worth USD ...
(Date:7/31/2014)... Senomyx , Inc. (NASDAQ: ... taste science technologies to discover, develop, and commercialize ... ingredient supply industries, today reported financial results for ... second quarter with $33.6 million in cash and ... past quarter Senomyx achieved another important milestone with ...
(Date:7/31/2014)... Calif. (PRWEB) July 31, 2014 Held ... diagnosed patients with an overview of the disease and ... of drug side effects, as well as updates on ... grateful to Dr. Sandy Srinivas for organizing this educational ... of kidney cancer. “Sandy and her colleagues have put ...
(Date:7/31/2014)... Canada (PRWEB) July 31, 2014 ... some of the first transcriptome-wide analyses appearing around ... standard assay for RNA measurement. In the last ... throughput, more specific, work with smaller input amounts, ... tissues (eg, blood samples). On the bioinformatics side, ...
Breaking Biology Technology:Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 2Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 3Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 4Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 5Electrodes for Medical Devices Market Expected to Reach USD 1.45 Billion Globally in 2019: Transparency Market Research 6SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 3SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 4SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 5SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 6SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 7SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 8SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 9SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 10SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 11SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 12SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 13SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 14SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 15SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 16The Evolution of RNA-Sequencing, Upcoming Live Webinar August 22 hosted by Xtalks 2
... Inc. (OTC Bulletin Board: WGBS), a leading ... and stem cell,research systems, today announced the ... company,s SmartSlide(TM) Micro-Incubation System with,Labtech International Limited ... in,France. The distributor agreement covers WaferGen,s entire ...
... 25 Senesco,Technologies, Inc. (the "Company") (Amex: ... the American Stock Exchange ("AMEX") stating that the ... the AMEX,s,letters dated June 15, 2007 and October ... of publicly available information pertaining to the Company,including ...
... March 25 Epeius Biotechnologies,Corporation announced today ... for,Targeted Gene Delivery in vivo. This patent ... of highly advanced,biotechnologies embodied in the company,s ... intravenous infusion, the Epeius,tumor-targeted gene delivery system ...
Cached Biology Technology:WaferGen Signs Exclusive Distribution Agreement for SmartSlide(TM) Micro-Incubation System in United Kingdom and France 2WaferGen Signs Exclusive Distribution Agreement for SmartSlide(TM) Micro-Incubation System in United Kingdom and France 3WaferGen Signs Exclusive Distribution Agreement for SmartSlide(TM) Micro-Incubation System in United Kingdom and France 4WaferGen Signs Exclusive Distribution Agreement for SmartSlide(TM) Micro-Incubation System in United Kingdom and France 5Senesco Technologies Regains Compliance With Amex's Continued Listing Requirements 2Senesco Technologies Regains Compliance With Amex's Continued Listing Requirements 3Epeius Biotechnologies Awarded U.S. Patent for Targeted Injectable Gene Delivery In Vivo 2
... for the use of small interfering RNA ... the RNA interference (RNAi) pathway have generated ... biology fields. siRNA for experimental use can ... enzymatically, and then transfected into the target ...
... potential applications for the use of small ... expression via the RNA interference,(RNAi) pathway have ... molecular biology fields. siRNA for experimental use ... enzymatically, and then transfected into the target ...
... The HybArray 12™ is an automated hybridization ... The system automates both the hybridization and ... glass slides. A single instrument can process ... in pairs and has multi-protocol software, enabling ...
... is commonly used as a fusion partner ... The GSTTag sequence has been reported to ... the solubility of its fusion partners. When ... GSTTag fusion proteins can be purified with ...
Biology Products: