HOME >> BIOLOGY >> NEWS
Commercial fishing causes dangerous fluctuations in fish populations

Commercial fishing causes serious fluctuations in fish populations leaving them in danger of total collapse, says new research published today. These fluctuations mean current measures in place to control fish stocks may not be sufficient to ensure their sustainability.

The research, which is published in today's Nature, involved compiling the largest ever survey of both exploited fish and non-exploited fish off the California coast. The research team looked at how the abundance of both types of fish varied over a 50 year period, and found the first evidence that exploited species' population levels vary far more than non exploited species' in the same ecosystem.

Researchers concluded that this increased variability in exploited fish stocks was most likely to be caused by the effect fishing has on the age structure of a population. Heavily-fished populations are unlikely to contain any fish older than a few years old, and as such are wholly reliant on the successful growth of larvae into baby fish (recruits) to maintain population numbers year on year.

Professor John Beddington from Imperial College London's Division of Biology, who worked on the study, explained: "Intensive fishing makes populations vulnerable because if they rely on recruits to replenish their numbers, there is always the danger that some kind of environmental factor will devastate the recruits in one season. This would leave the population close to collapse, with very few young fish coming into the group to replace those being caught."

Professor Beddington adds that the increased variability has serious implications for the way in which fish stocks are managed: "Typically fish populations are managed by governments setting total allowable catch limits (TACs), but a fixed TAC which doesn't take into account the variability of abundance over time, may mean that in some years it is completely incompatible with the population size. This means that fishing v
'"/>

Contact: Danielle Reeves
danielle.reeves@imperial.ac.uk
44-020-759-42198
Imperial College London
18-Oct-2006


Page: 1 2

Related biology news :

1. Commercial marketing in schools may discourage healthy nutrition environment for students
2. Stray penguins probably reached northern waters by fishing boat
3. Light sticks may lure turtles to fishing lines
4. Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply
5. Overfishing great sharks wiped out North Carolina bay scallop fishery
6. Long-lived deep-sea fishes imperiled by technology, overfishing
7. Reef sharks threatened by overfishing
8. Long-term ocean data confirm fishing puts species in double jeopardy
9. UN review shows need to halt destructive fishing practice
10. Overfishing puts Southern California kelp forest ecosystems at risk, report scientists
11. Researchers trawl the origins of sea fishing in Northern Europe

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/10/2020)... ... July 09, 2020 , ... Today CJ BIO announced the first ... insight on the “fifth taste” phenomenon that is revolutionizing ingredient mixes, nutritional content and ... be live on Monday, July 13, 2020 at11:00 AM (CDT) during SHIFT20, the virtual ...
(Date:7/1/2020)... ... July 01, 2020 , ... ... completed the purchase of Teva-Takeda Pharmaceuticals’ packaging facility in Minakuchi, located in the ... clinical supply facility located in Kakegawa, the new 60,000-square-foot facility will provide customers ...
(Date:6/25/2020)... MANSFIELD, Mass. (PRWEB) , ... June 24, 2020 ... ... provider of cloud-based enterprise software and software-driven clinical data services that accelerate drug ... trials for low-dose selinexor, an XPO1 inhibitor, in hospitalized patients with severe COVID-19. ...
Breaking Biology News(10 mins):
(Date:7/7/2020)... ... ... R3 International is now offering stem cell therapy for Alzheimers dementia in ... the patient's condition, treatment may be offered IV, intrathecal or with a combination. , ... dementia, and the incidence continues to increase as individuals live longer. There is no ...
(Date:7/1/2020)... GREEN, Ohio (PRWEB) , ... June 29, 2020 ... ... that offers access to competitively procured purchasing contracts to its membership, recently named ... to provide TIPS members with the opportunity to purchase ergonomic seating, cafeteria tables, ...
(Date:6/28/2020)... SAN JOSE, Calif. (PRWEB) , ... June 25, ... ... the globe, researchers are racing to develop a vaccine or drug treatment. In ... company Recursion has publicly released the world’s largest imaging dataset portraying ...
(Date:6/23/2020)... (PRWEB) , ... June 23, 2020 , ... ... facilitate access to unique lab-made bioresearch materials, today announced the availability of the ... Whitt laboratory at University of Tennessee, enables studies of SARS-CoV-2 viral entry and ...
Breaking Biology Technology:
Cached News: