Navigation Links
Bering Sea study finds prey density more important to predators than biomass
Date:1/3/2013

CORVALLIS, Ore. Marine resource managers often gauge the health of species based on overall biomass, but a new study of predator-prey relationships in the Bering Sea found that it isn't the total number of individuals that predators care about it's how densely they are aggregated.

It's more than searching for an easy meal, the researchers say. Predators need to balance how much energy they expend in searching for food with the caloric and nutrient value of that which they consume. When prey doesn't aggregate, however, the search for food becomes much more difficult affecting the health of the predators' offspring and the vitality of their overall population.

Results of the study were published this week in the journal PLOS ONE. The study was part of the Bering Sea Integrated Ecosystem Research Project, which was funded by the North Pacific Research Board and the National Science Foundation.

"We had to think very differently about these interactions, trying to see the world from the predators' point of view," said Kelly Benoit-Bird, an Oregon State University marine ecologist and lead author on the study. "When we first tried to identify good foraging locations for predator species we looked at areas of high prey numbers because it makes sense that they'd be where the food is. But the results didn't match what we might have expected.

"Predator populations that should have been doing well, based on prey numbers or biomass, were in fact not doing well," added Benoit-Bird, an associate professor in OSU's College of Earth, Ocean, and Atmospheric Sciences. "What we discovered is that smaller aggregations of prey are more attractive to predators if they are sufficiently dense."

The findings are particularly important, scientists say, because almost all fisheries management is based on biomass tons of fish and not how those fish may be distributed in the sea.

In their study, the researchers looked at
'/>"/>

Contact: Kelly Benoit-Bird
kbenoit@coas.oregonstate.edu
541-737-2063
Oregon State University
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Big brains are pricey, guppy study shows
2. Hebrew University study finds key mechanism in calcium regulation
3. New study documents the natural relationship between CO2 concentrations and sea level
4. Stowers study hints that stem cells prepare for maturity much earlier than anticipated
5. Birdsong study pecks theory that music is uniquely human
6. Study turns parasite invasion theory on its head
7. Gout study offers genetic insight into disease of kings
8. Native orchid protection and conservation subject of new AgriLife Research study
9. Cell Transplantation study investigates fate and function of cells transplanted to the CNS
10. Study reports iron oxide nanoparticles effective for labeling human endothelial cells
11. Study looks at gray seal impact on beach water quality
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Bering Sea study finds prey density more important to predators than biomass
(Date:10/18/2014)... 2,000 patients referred for evaluation of suspected genetic ... for 25 percent, including detection of a number ... to disease, according to a study appearing in ... to coincide with the American Society of Human ... exons or coding regions of thousands of genes ...
(Date:10/17/2014)... release is available in German . ... a very few drugs. When treating overdoses, doctors are often ... especially difficult if there is a combination of drugs involved. ... and accidentally swallows his grandmother,s pills? ETH professor Jean-Christophe Leroux ... to find an answer to this question. "The task was ...
(Date:10/16/2014)... are anything but sustainable: environmental damage to soil ... increasingly evident. Despite their disadvantages, however, monocultures remain ... the sole possibility of achieving higher yields in ... an ecology professor at the University of Zurich, ... forestry. After all, a new study carried out ...
Breaking Biology News(10 mins):Whole-exome sequencing shows potential as diagnostic tool 2Emergency aid for overdoses 2Emergency aid for overdoses 3Plant communities produce greater yield than monocultures 2Plant communities produce greater yield than monocultures 3
... NEWTOWN SQUARE, Pennsylvania, September 27, 2011 An ... U.S. Forest Service,s Forest Inventory and Analysis (FIA) program ... eastern United States is increasing despite infestations of hemlock ... The information comes from an e-Science Update co-authored by ...
... ROUGE A research team led by LSU Associate Professors ... the results of a combined field and laboratory study showing ... living in Louisiana marshes. , The study, funded ... the Gulf of Mexico Research Initiative is being published in ...
... ... Presidential Early Career Award for Scientists and Engineers (PECASE). The award ... scientists and engineers in the early stages of their careers. ... significant award," said Jane Lubchenco, Ph.D., under secretary of commerce for ...
Cached Biology News:US Forest Service study finds hemlock still abundant despite adelgid infestation 2LSU researchers find impact of oil spill in marsh fish species 2President to honor high achieving, early career NOAA scientists 2
(Date:10/20/2014)... PARK, Calif. , Oct. 20, 2014 /PRNewswire/ ... today that the Company has signed a Notice ... of Regenerative Medicine (CIRM), effective October 1, 2014.  ... Clinical Development payments and the release of additional ... million CIRM grant award for clinical development of ...
(Date:10/20/2014)... , Oct. 20, 2014 PureTech ... company tackling big healthcare problems, announced today the ... round, with participation from Invesco Perpetual, a $120 ... used to drive PureTech,s existing pipeline forward and ... "PureTech has the scientific creativity to really go ...
(Date:10/19/2014)... 19, 2014 The Latin American hardware ... in Latin America with analysis and forecast of revenue. ... and is expected to reach $2,366.8 million by 2018, ... , Browse through the TOC of the Latin American ... the in-depth analysis provided. It also provides a glimpse ...
(Date:10/19/2014)... The Asian Automatic patient billing report defines and ... of revenue. The Automatic patient billing market in Asia ... 2018, at a developing CAGR of 7.2% from 2013 ... Asian Automatic patient billing market, to get an idea ... glimpse of the segmentation of this market in the ...
Breaking Biology Technology:Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 2Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 3Asterias Biotherapeutics Announces Notice of Grant Award with CIRM for Phase 1/2a Clinical Trial of AST-OPC1 in Complete Cervical Spinal Cord Injury 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 2The Latin American hardware encryption display market is expected to reach $2,366.8 million by 2018 - New Report by MicroMarket Monitor 3The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 2The Asian Automatic patient billing market is estimated to grow to around $463.9 million by 2018 - New Report by MicroMarket Monitor 3
... YORK, Aug. 24 The DNA sequencing equipment ... and 2012, spiraling upward from,$335 million to $528 ... Sequencing Equipment and Service Markets, a new report ... been relatively stable for the last,several years, with ...
... Conference Call Originally Scheduled for 9:00 a.m. Eastern Time ... Be Rescheduled After Private Placement Closes -, FREMONT, ... (Nasdaq: CIPH ), today announced that it,has entered ... with a group of existing and new investors. Under ...
... DIEGO, Aug. 23 eBioscience Corporation announced,the appointment ... eBioscience, effective,immediately. Dr. Nelson comes to eBioscience from ... Development. Dr. Nelson will assume the role ... as President during a transition period. Nelson will,also ...
Cached Biology Technology:DNA Sequencing Equipment Market to Fragment and Grow as Competition, New Technologies Develop 2Vermillion (Formerly Ciphergen) Announces $20.5 Million Private Placement of Common Stock 2Vermillion (Formerly Ciphergen) Announces $20.5 Million Private Placement of Common Stock 3Todd R. Nelson Named Chief Executive Officer of eBioscience, Inc. 2
Request Info...
... Cell Expansion Kit - Neurosphere is a system ... cell expansion as neurospheres in a serum free ... Plus Media Supplement, which has been optimized for ... al . (1996) Genes & Development 10 ...
... Source: Calf thymus Description: Topoisomerase I ... a transient breakage and rejoining of phosphodiester bonds ... allows molecules to be differentiated by a single ... I is active in the absence of Mn ...
... Topo I, Wild Type ... 1 mM DTT, 200 µM EDTA, 20% glycerol, ... I (Topo I) is a monomeric protein of ... It catalyzes the relaxation of both positive and ...
Biology Products: