Navigation Links
UNH researchers studying spiny dogfish, Gulf of Maine's mini shark
Date:2/24/2009

DURHAM, N.H. For such a small shark species, there seems to be super-sized confusion about its population status. But for researchers at the University of New Hampshire, one thing is clear definite changes have occurred to spiny dogfish shark populations in the past two decades.

Commercial fishermen haul up nets loaded with so many of the three-foot-long sharks that the yellow-eyed creatures are often considered a nuisance. However, fishery management plans have set quotas to limit the harvest of dogfish to 3,000 pounds per trip in state waters due to concerns by scientists that the species could easily be overfished. The market for dogfish meat is located primarily in England and Germany, so dogfish caught in the Gulf of Maine are shipped overseas.

Confusion over their population status is compounded by the fact that there are relatively few recent studies to document dogfish ages, growth rates and maturity. In fact, it has been more than 20 years since the last life history study was conducted for dogfish in the Gulf.

"In order for management to be effective, we need updated and accurate biological information, we need to accurately age these fish and determine their age at maturity," says Paul Tsang, UNH professor of molecular, cellular and biomedical sciences. "To really understand what's going on with their populations, we need to understand their basic life history."

Tsang is collaborating with University of New England professors David Koester and James Sulikowski to establish basic biological information about dogfish populations in the Gulf of Maine. Spiny dogfish sharks are part of the Elasmobranch family, which includes sharks, skates and rays. With funding from N.H. Sea Grant, UNH Ph.D. candidate Walter Bubley is working with Tsang to determine the average and maximum age, growth rate and age at maturity for this species.

Bubley worked closely with New Hampshire commercial fishermen to collec
'/>"/>

Contact: Rebecca Zeiber
rebecca.zeiber@unh.edu
603-749-1565
University of New Hampshire
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Researchers identify proteins involved in new neurodegenerative syndrome
2. Texas researchers and educators head for Antarctica
3. MGH researchers describe new way to identify, evolve novel enzymes
4. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
5. U of MN researchers discover noninvasive diagnostic tool for brain diseases
6. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
7. Researchers discover new strategies for antibiotic resistance
8. Researchers find new taste in fruit flies: carbonated water
9. Binghamton University researchers investigate evolving malaria resistance
10. UIC researchers find promising new targets for antibiotics
11. Researchers develop simple method to create natural drug products
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
UNH researchers studying spiny dogfish, Gulf of Maine's mini shark
(Date:7/11/2014)... news release is available in German . ... is a method that uses the refraction of X-rays ... The images produced with this method are often of ... scientists in the team of Prof. Franz Pfeiffer are ... imaging and therapy including X-ray phase-contrast imaging. One ...
(Date:7/11/2014)... members to reduce aggression and gain access to scarce ... activities shows a certain pattern across the day. The ... Biology Letters . , Grooming between individuals in a ... To be groomed has hygienic benefits and is stress ... provide access to infants, mating opportunities and high quality ...
(Date:7/11/2014)... transplantation of mesenchymal stem cells can stimulate neurogenesis in ... Alzheimer,s disease (AD) and improve tissue and function injury ... reported on the therapeutic effect of adipose-derived stem cells ... effect on oxidative injury and neurogenesis in the brain ... School of Life Sciences, Tsinghua University, China transplanted ADSCs ...
Breaking Biology News(10 mins):New simple setup for X-ray phase contrast 2Baboons groom early in the day to get benefits later 2
... state-of-the-art electron microscopy techniques, a team led by researchers ... described the precise arrangement of chemoreceptorsthe receptors that sense ... have found that this specific architecture is the same ... that this is a stable, universal structure that has ...
... EAST LANSING, Mich. - It,s been cultivated for at least ... every continent except Antarctica. Now the humble potato has had ... important vegetable worldwide," said Robin Buell, an MSU associate professor ... released the first draft sequence of the potato genome. "This ...
... chemicals to observe how basic cellular activities differ between healthy ... too slow or too toxic to perform on live cells. ... Faculty of 1000 Biology and leading authority in chemistry and ... chemical reaction to make live cancer cells light up quickly ...
Cached Biology News:Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 2Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 3Caltech scientists get detailed glimpse of chemoreceptor architecture in bacterial cells 4MSU scientist helps map potato genome, hope to improve crop yield 2
(Date:7/10/2014)... in the journal PNAS (Proceedings of the National ... day and sleep deprivation have a significant effect on ... at the best time of day to test for ... administering medicines effectively. , Researchers from the University of ... the links between sleep deprivation, body clock disruption and ...
(Date:7/10/2014)... Wash. The lithium-ion batteries that power our laptops ... longer on a single charge with the help of ... porous material to replace the graphite traditionally used in ... than 10 times the energy storage capacity of graphite. ... battery electrode was published today in Nature Communications ...
(Date:7/10/2014)... study by researchers at the University of Illinois ... mechanisms governing the interplay of spin and heat ... of ultrafast spintronic devices for data storage and ... as well as spin-angular momentum. In a typical ... is no spin current," explained David Cahill, a ...
(Date:1/15/2014)... , "The interface is the device," Nobel laureate ... properties to be found at the junctures where ... world of nanotechnology, the interfaces between layers of ... in such high-tech favorites as spintronics, high-temperature superconductors, ...
Breaking Biology Technology:Time of day crucial to accurately test for diseases, new research finds 2Silicon sponge improves lithium-ion battery performance 2Silicon sponge improves lithium-ion battery performance 3University of Illinois study advances limits for ultrafast nano-devices 2A deeper look at interfaces 2
... - Neptune Technologies & Bioressources Inc. ("Neptune") (NASDAQ.NEPT - ... the fiscal 2009 third quarter and nine-month period ended ... for its fiscal year 2009 now ending on February, ... period ended February 28, 2009 in the range of ...
... regular improvements in information technology, says Slava Rotkin, but ... Take the laptop, for example. Its components, especially its ... while the instrument,s power and capacity increase. But heat ... melt and the laptop hardware to fail. , Indeed, ...
... Approval for SIMPONI , ... Ortho Biotech Inc. and Schering-Plough Corporation (NYSE: ... granted approval of SIMPONI (TM) (golimumab),as a once-monthly, ... active rheumatoid arthritis (RA), active psoriatic arthritis (PsA),and ...
Cached Biology Technology:Neptune Technologies to expect Record Revenues; Fiscal 2009 Third Quarter and Year-End Results 2Neptune Technologies to expect Record Revenues; Fiscal 2009 Third Quarter and Year-End Results 3Neptune Technologies to expect Record Revenues; Fiscal 2009 Third Quarter and Year-End Results 4Neptune Technologies to expect Record Revenues; Fiscal 2009 Third Quarter and Year-End Results 5New 'near-field' radiation therapy promises relief for overheating laptops 2New 'near-field' radiation therapy promises relief for overheating laptops 3Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 2Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 3Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 4Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 5Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 6Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 7Health Canada Approves SIMPONI(TM) (golimumab) for Treatment of Rheumatoid Arthritis, Psoriatic Arthritis and Ankylosing Spondylitis 8