Navigation Links
Why letting salmon escape could benefit bears and fishers
Date:4/10/2012

ble to bears helps not only bears but also the ecosystems they nourish when they distribute the uneaten remains of salmon."

When salmon are plentiful in coastal streams, bears won't eat as much of an individual fish, preferring the nutrient-rich brains and eggs and casting aside the remainder to feed other animals and fertilize the land. In contrast, when salmon are scarce, bears eat more of a fish. Less discarded salmon enters the surrounding ecosystem to enrich downstream life, and a richer stream life means a better environment for salmon.

In four out of the six study systems, allowing more salmon to spawn will not only help bears and the terrestrial landscape but would also lead to more salmon in the ocean. More salmon in the ocean means larger harvests, which in turn benefits fishers. However, in two of the systems, helping bears would hurt fisheries. In these cases, the researchers estimated the potential financial costthey looked at two salmon runs on the Fraser River, B.C., and predicted an economic cost of about $500,000 to $700,000 annually. This cost to the human economy could help support locally threatened grizzly bear populations, they argue.

While these fisheries are certified as sustainable by the Marine Stewardship Council (MSC), the researchers suggest that the MSC principle that fisheries have minimal ecosystem impact might not be satisfied if the fishery is contributing to grizzly bear conservation problems.

The researchers believe the same analysis can be used to evaluate fisheries around the world and help managers make more informed decisions to balance economic and ecological outcomes.


'/>"/>

Contact: Bryan Ghosh
bghosh@plos.org
44-122-344-2837
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions
2. Research challenges conventional notions about salmon survival
3. Scientists achieve first tracking of salmon from headwaters in Rockies through Pacific to Alaska
4. Salmon smolt survival similar in Columbia and Fraser rivers
5. UBC study establishes formula for predicting climate change impact on salmon stocks
6. No place like home: New theory for how salmon, sea turtles find their birthplace
7. Transporting juvenile salmon hinders adult migration
8. The medium is the message: Manipulating salmonella in spaceflight curtails infectiousness
9. Invasives threaten salmon in Pacific Northwest
10. Yale researchers uncover secrets of salmonellas stealth attack
11. Hatchery fish may hurt efforts to sustain wild salmon runs
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/19/2014)... improve students, chances of completing introductory biology courses ... (UH) implemented a comprehensive student success program, employing ... , Through a grant from the Texas ... Biology and Biochemistry embarked on a pilot program ... non-majors and "Introductory Biology" for science majors. These ...
(Date:8/19/2014)... . Wind ... large amount of electricity is to be produced with renewable ... be stored during productive periods so that these fluctuations can ... adequate for the purpose. Science and industry are therefore working ... systems that used to be too expensive or unsophisticated to ...
(Date:8/19/2014)... lemur. It,s not an African Bush Baby or even a ... downright "cool" primate from Southeast Asia. , "It,s really not ... Brown, curator-in-charge at the University of Kansas, Biodiversity Institute. "A ... body; a long tail with a furry tuft at the ... a bit like the disks on the digits of tree ...
Breaking Biology News(10 mins):University of Houson program earns kudos for improving grades, retaining students 2University of Houson program earns kudos for improving grades, retaining students 3Asian inventions dominate energy storage systems 2Asian inventions dominate energy storage systems 3Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 2Philippine tarsier gets boost from Kansas research, and genetic proof of a new variety 3
... of breast cancer patients have tumours that show rapid ... in all of these cases is the presence of ... membranes. Consequently, these aggressive tumours are referred to as ... IRB Barcelona headed by ICREA researcher Roger Gomis, have ...
... , This release is available in ... unsightly vegetable patches, they can also result in extensive ... this garden pest are similar to those involved in ... Breeding Research in Cologne and the University of Zurich ...
... experts from the European Society on Clinical and ... the International Osteoporosis Foundation (IOF) have published a ... femoral (upper thigh bone) fractures and long-term treatment ... common drug therapy for osteoporotic fracture prevention, prescribed ...
Cached Biology News:The most aggressive forms of breast cancer elude cellular control mechanisms in order to expand 2Mildew-resistant and infertile 2IOF and ESCEO position on atypical femoral fractures and long-term bisphosphonate use 2
(Date:8/19/2014)... Research and Markets  has announced the addition of the ... report to their offering. This report ... in US$ Thousands. The report provides separate comprehensive analytics for ... , Asia-Pacific , and Rest of ... 2012 through 2020. Market data and analytics are derived from ...
(Date:8/19/2014)... In November 2012, the European Union (EU) ... (PBRER) in a new PSUR – responding to the increasing ... of a drug. Adopted in many regions, the main objectives ... a comprehensive and critical analysis of new or emerging information ... any new evidence of the potential benefits of a drug; ...
(Date:8/18/2014)... 2014) -- A new therapy developed by researchers ... College of Medicine and Columbia University Medical Center ... interventional cardiovascular disease treatment. , The researchers ... molecular therapy could selectively inhibit blood vessel re-narrowing ... procedure using a balloon catheter to open narrowed ...
(Date:8/18/2014)... HIV Infection Drug Market and Pipeline Insight is a ... infection and the number of deaths due to AIDS has ... the globe. It has been estimated that the death rate ... with the rates for children being even much lower. A ... has been the improved access to antiretroviral drugs and therapy ...
Breaking Biology Technology:Global Solid Oxide Fuel Cells (SOFCs) - Strategic Business Report 2014 2Top Five Best Practices for Developing Your Periodic Benefit Risk Evaluation Report (PBRER), New Webinar Hosted by Xtalks 2Selective therapy may improve artery repair after interventional cardiovascular procedures 2Selective therapy may improve artery repair after interventional cardiovascular procedures 3Global HIV Infection Drug Market Overview 2Global HIV Infection Drug Market Overview 3Global HIV Infection Drug Market Overview 4
... Electric Power Co. and Wisconsin Gas LLC, collectively known ... for relationship management software to automate, track and execute ... than 1.1 million electric customers in Wisconsin and Michigan's ... customers in Wisconsin. As part of a sourcing transformation, ...
... MILWAUKEE - Niceware International, a supplier ... on Monday they have introduced version 4.0 of their ... include support for reading and programming radio frequency identification ... The system's modules are also integrated with Windows programs ...
... services provider, announced Tuesday a new market campaign in ... the campaign will expand the PDS presence in the ... Specialized Technology Partner Certifications from Cisco in the three ... Communications, IP Communications Express, and Wireless. In addition, PDS ...
Cached Biology Technology:
Normal human serum, single donor...
... Quality ISO 9001:2000 Certified ... All Precedures Validated, SOP's Training ... Process for All Procedures GLP Documentation Upon ... one stop shopping point for all your ...
Human IL-17D Affinity Purified Polyclonal Ab...
BBS/Glycerol/Casein Block and Diluent - 10X Concentrate, 1 L...
Biology Products: