HOME >> BIOLOGY >> NEWS
Overfishing in inland waters reduces biodiversity and threatens health

Systematic overfishing of fresh waters occurs worldwide but is largely unrecognized because of weak reporting and because other pressures can obscure fishery declines, according to an article in the December 2005 issue of BioScience. Although the status of inland waters and their fish species should be of broad concern, threats to freshwater fisheries and associated biodiversity have received scant attention from conservation groups and the media, according to author J. David Allan of the University of Michigan and his colleagues. Allan and colleagues refer to the relative lack of attention to fresh waters as a "dangerous" imbalance, since freshwater ecosystems are by some accounts more threatened than marine ecosystems.

Fishing is a crucial source of livelihoods in developing nations, and in 2000 constituted an estimated 15.3 percent of human consumption of animal protein. About 1 billion people rely on fish as their primary protein source. Landings from inland waters have increased more than fourfold since 1950, mainly in developing nations, though in developed countries, in contrast, catches have decreased. But catch statistics are difficult to interpret for inland species because they may exclude recreational and illegal fisheries, and because landings are dispersed. Moreover, overfishing may not immediately cause declines in the total catchand its weight may even transiently increase. Overfishing leads to numerous changes in both the target species and other species. Larger individuals and species are often successively replaced in the catch by smaller ones. At the same time, some fish populations respond to fishing pressure with reductions in mean size at maturation.

Allan and colleagues identify two main types of overfishing. One leads to marked declines in catch per unit effort and size of individuals captured. The second type is characterized by sequential declines of species and depletion of individuals and species of large size, especially
'"/>

Contact: Donna Royston
droyston@aibs.org
202-628-150-0261
American Institute of Biological Sciences
1-Dec-2005


Page: 1 2

Related biology news :

1. Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply
2. Overfishing great sharks wiped out North Carolina bay scallop fishery
3. Overfishing puts Southern California kelp forest ecosystems at risk, report scientists
4. Overfishing may drive endangered seabird to rely upon lower quality food
5. Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems
6. The global carbon budget -- proper accounting means paying attention to inland waters
7. Go Fishing no game for inland waters worldwide
8. Top experts and scientists at BioFinland 05 Congress
9. Finland tops environmental scorecard at World Economic Forum in Davos
10. Masquerading in murky waters
11. Stray penguins probably reached northern waters by fishing boat

Post Your Comments:
(Date:11/7/2014)... , November 6, 2014 Leading ... for better mobile security revolutionizing online transactions.  Companies in focus ... Holdings Ltd. (NYSE: BABA ), Google Inc. (NASDAQ: ... ), eBay Inc. (NASDAQ: EBAY ) and MasterCard ... NXTD and NXTDW), a biometric authentication company focused on ...
(Date:11/6/2014)... Medicine, Inc, a Baltimore-based bioinformatics company focused on ... a research collaboration with the international leader in ... CSBR). , "There are many companies utilizing advances ... TumorGraft technology is unique in a way that ... vast amounts of valuable data. Our bioinformatic analysis ...
(Date:11/4/2014)... SALT LAKE CITY, Nov. 5, 2014 – University of ... uses enzymes to help jet fuel produce electricity without ... can be used to power portable electronics, off-grid power ... appears online today in the American Chemical Society journal ... into electricity through a chemical reaction between a fuel ...
Breaking Biology News(10 mins):Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 2Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 3Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 4Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 5Universal Authentication Methods Provide More Secure Operations for Biometrics Devices - Company Joins FIDO Alliance for Consumer Protection 6Insilico Medicine, Inc announces research collaboration with Champions Oncology, Inc 2Jet-fueled electricity at room temperature 2
(Date:11/27/2014)... -- First articles published now available ... Elsevier , a world-leading provider of scientific, technical and ... the launch of a new journal: Extreme ... launch of Extreme Mechanics Letters is driven ... applied sciences such as micro and nanotechnologies, biotechnologies, soft ...
(Date:11/26/2014)... 21, 2014 (PRWEB) November 26, 2014 ... communications network, today announced the organization has won a ... Club Awards. Digitas Health LifeBrands was honored with a ... other PHCG agencies received eight Awards of Excellence. ... aspects of pharmaceutical advertising and promotion. The Awards provide ...
(Date:11/26/2014)... The North America Thermal Protective ... for detailed analysis of the growth trends and ... $616.3 million by 2018, growing at a CAGR ... through the TOC of the North America Thermal ... of the in-depth analysis and industry segmentation supported ...
(Date:11/26/2014)... and PHILADELPHIA , Nov. ... most demanding and unforgiving environments. Human exploration of space ... performance to ensure mission safety and success, and prevent ... performance for mission success, little is known about how ... of cognition are primarily affected. Now, Penn ...
Breaking Biology Technology:Elsevier Announces the Launch of a New Journal: Extreme Mechanics Letters 2Elsevier Announces the Launch of a New Journal: Extreme Mechanics Letters 3Publicis Healthcare Wins 20 Rx Club Awards 2Publicis Healthcare Wins 20 Rx Club Awards 3The North America Thermal Protective Clothing Market is estimated to grow up to $616.3 million by 2018 - Report by MicroMarket Monitor 2The North America Thermal Protective Clothing Market is estimated to grow up to $616.3 million by 2018 - Report by MicroMarket Monitor 3Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 2Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 3Penn Medicine Team Develops Cognitive Test Battery to Assess the Impact of Long Duration Spaceflights on Astronauts' Brain Function 4
Cached News: