Navigation Links
Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

tion, allowing the scallop population to support a fishery and still replenish itself each year. In contrast, sampling by Peterson and co-author Sean Powers in recent years—after the cownose ray population explosion—showed that the migrating rays consumed nearly all adult bay scallops in the area, except those protected inside fences that the researchers had put up to keep the rays out. By 2004, cownose rays had completely devastated the scallop population, terminating North Carolina's century-old bay scallop fishery.

"Increased predation by cownose rays also may inhibit recovery of oysters and clams from the effects of overexploitation, disease, habitat destruction, and pollution, which already have depressed these species," says Peterson, noting shellfish declines in areas occupied by cownose rays and examples of stable or growing shellfish populations in areas beyond the ray's northernmost limit.

Ecosystem effects of increases in the other ray, skate, and smaller shark species are unknown, but like the cownose ray, may also be cascading down to species lower in the food web.

"Despite the difficulty of piecing together ecosystem impacts of overfishing," co-author Travis Shepherd of Dalhousie emphasizes, "the real challenge will be to move beyond retrospective analyses and instead prevent ecosystem-wide changes from happening in the first place."

"Our study provides evidence that the loss of great sharks triggers changes that cascade throughout coastal food webs," says Baum. "Solutions include enhancing protection of great sharks by substantially reducing fishing pressure on all of these species and enforcing bans on shark finning both in national waters and on the high seas."

"Maintaining the populations of top predators is critical for sustaining healthy oceanic ecosystems," says Peterson. "Despite the vastness of the oceans, its organisms are interconnected, meaning that changes at one level have implicatio
'"/>

Source:University of Miami Rosenstiel School of Marine & Atmospheric Science


Page: 1 2 3 4

Related biology news :

1. Overfishing may drive endangered seabird to rely upon lower quality food
2. Overfishing in inland waters reduces biodiversity and threatens health
3. Scientists discover unique microbe in Californias largest lake
4. Worlds largest rainforest drying experiment completes first phase
5. NASA study finds snow melt causes large ocean plant blooms
6. New project aims to make large-scale lobster farms feasible
7. Butterfly migration could be largest known
8. Amazon symposium to address large-scale conservation
9. Inhaling large amounts of salt can cause hypertension
10. Size matters: Preventing large mammal extinction
11. Carnegie Mellon University research reveals how cells process large genes
Post Your Comments:
(Date:6/24/2015)... MARTIGNY, Switzerland , June 24, 2015 /PRNewswire/ ... strategic partnership with emerging biometric password solution one ... http://photos.prnewswire.com/prnh/20150623/225014LOGO one face in, ... offers a ground-breaking and affordable multifactor-authentication biometric answer ... speaker recognition technology, provided in partnership with KeyLemon, ...
(Date:6/23/2015)... -- Research and Markets( http://www.researchandmarkets.com/research/vq2k2f/bodyworn ... "Body-Worn Temperature Sensors Market - Global Industry Analysis, ... 2020" report to their offering. ... body-worn temperature sensors market. The global body-worn temperature ... of types, care setting, patient demographic, applications and ...
(Date:6/23/2015)... BEACH GARDENS, Fla. , June 23, ... multi-factor identity management and authentication solutions, today announced ... Altus strong, multi-factor authentication solution.  The enhancements ... of use of the DigitalPersona Altus platform ... biometric reader compatibility. In today,s ...
Breaking Biology News(10 mins):KeyLemon Announces Partnership With Biometric Password Solution onefacein 2Body-Worn Temperature Sensors Market - Global Industry Analysis 2Crossmatch Releases Enhanced DigitalPersona Altus Advanced Authentication Functionality 2
... Hospital scientists has identified a possible new approach to ... component in a bid to invigorate the immune response. ... function of one of the innate immune molecules is ... response to infections and other threats. Investigators showed the ...
... Albert Einstein College of Medicine of Yeshiva University ... development of myelodysplastic syndromes (MDS), serious blood diseases that are ... leukemia. The findings could lead to targeted therapies against MDS ... the online edition of the journal Blood . ...
... The next "next-gen" technology in genome sequencing has gotten a ... Cold Spring Harbor Laboratory (CSHL) and collaborators today published results ... which was recently introduced but whose use has so far ... by CSHL Assistant Professor Michael Schatz and Adam Phillippy and ...
Cached Biology News:Innate immune system protein provides a new target in war against bacterial infections 2Innate immune system protein provides a new target in war against bacterial infections 3Myelodysplastic syndromes (MDS) linked to abnormal stem cells 2An error-eliminating fix overcomes big problem in '3rd-gen' genome sequencing 2An error-eliminating fix overcomes big problem in '3rd-gen' genome sequencing 3
(Date:6/30/2015)... DIEGO , June 30, 2015  The ... Education in Biosciences (CCE/Bio) and UC San Diego ... fermentation, to be held Aug.  12 – 14, ... ).  This three-day workshop provides an intense exposure ... industrial biotechnology, and is well-suited to biologists, process ...
(Date:6/30/2015)...  The Dr. Samadi Prostate Cancer Center in ... suite of new genetic testing methods for men with an ... cancer. Dr. Samadi,s Prostate Cancer Center ... the risk and optimizing the diagnosis of prostate cancer, both ... now offer these revolutionary genetic tests to men with an ...
(Date:6/30/2015)... ... June 30, 2015 , ... ... media company, launched “Cannavoices,” an unprecedented digital video and broadcast initiative. Produced by ... the most dynamic collection of legal medical cannabis stories ever assembled. , ...
(Date:6/29/2015)... KY and Manhattan, KS (PRWEB) , ... June ... ... has acquired US PATENT 7736892 B2. Under the terms of the agreement, MediVet ... Umbilical Cord Matrix Stem Cells (UCMSCs). MB-007 is currently in pre-clinical development as ...
Breaking Biology Technology:UC San Diego Extension to Offer Third Annual Microbial Fermentation Workshop 2New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 2New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 3New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 4New Revolutionary Genetic Testing for Prostate Cancer Offered at Dr. Samadi's Prostate Cancer Center 5Cannavoices Launches a Legal Medical Cannabis Documentary Initiative 2Cannavoices Launches a Legal Medical Cannabis Documentary Initiative 3MediVet Biologics Acquires Exclusive Patent License from Kansas State University 2MediVet Biologics Acquires Exclusive Patent License from Kansas State University 3
... of the fruit fly and roundworm,s functional genomic elements: DNA ... which genes are turned on and off at various times ... of the Human Genome Project, the genomes of the fruit ... elegans , are powerful models for understanding human biology ...
... (Nasdaq: NEOG ) announces the following Webcast:What: ... January 4, 2011 @ 11:00 ETWhere: , http://www.videonewswire.com/event.asp?id=75037 ... on to the web at the address above.  Contact: ... are unable to participate during the live webcast, the ...
... (December 21, 2010) -- A researcher known widely ... and use of minimally toxic, environmentally friendly chemicals ... Dr. Paul Anastas, science advisor to the ... for the EPA,s Office of Research and Development ...
Cached Biology Technology:Scientists reveal how biological activity is regulated in fruit fly and roundworm genomes 2Scientists reveal how biological activity is regulated in fruit fly and roundworm genomes 3Scientists reveal how biological activity is regulated in fruit fly and roundworm genomes 4Science advisor to the US EPA to speak to industry, academic leaders on sustainability innovations 2Science advisor to the US EPA to speak to industry, academic leaders on sustainability innovations 3
Mouse monoclonal [3F8 ] to smooth muscle Myosin heavy chain I ( Abpromise for all tested applications). entrezGeneID: 4629 SwissProtID: P35749...
Rabbit polyclonal to pCrosstide (HRP) ( Abpromise for all tested applications)....
IkappaB-alpha (112B2) Mouse mAb...
Human sIL-2R/CD25 ELI-PAIR Kit...
Biology Products: