Navigation Links
Horseshoe crab decline threatens shorebird species

Each year, the red knot, a medium-sized shorebird, makes a 20,000-mile round-trip from the southern tip of Argentina to the Artic Circle ?one of the longest migrations of any bird. And each year from April to June, the red knot stops over in the Delaware Bay to feed on horseshoe crab eggs resulting from the largest spawning of horseshoe crabs found on the East Coast of the United States.

Researchers from Virginia Tech and the New Jersey Division of Fish and Wildlife have documented a reduction in the number of red knot birds throughout the Delaware Bay tied to a decline in horseshoe crabs.

The research will be reported in The Journal of Wildlife Management, in the article, "Horseshoe Crab Eggs Determine Red Knot Distribution in Delaware Bay Habitats," by Virginia Tech fisheries and wildlife research scientist Sarah Karpanty, professor Jim Fraser, and associate professor Jim Berkson, New Jersey Division of Fish and Wildlife biologists Lawrence Niles and Amanda Dey, and Virginia Tech statistics professor Eric Smith. The article provides scientifically defensible information for wildlife management officials as well as for other members of the scientific community.

During their Delaware Bay stopover, the red knot nearly doubles its body mass as it gorges itself almost exclusively on horseshoe crab eggs. The purpose of this feeding frenzy is to ensure that the shorebirds have enough energy to complete the trip north to their breeding ground in the Artic.

However, due to horseshoe crab's popularity as bait used by fishermen, the crabs appear to be in serious decline. At the same time, there has been a great reduction in the total population of red knots, the report notes. "The number of horseshoe crab eggs was the most important factor determining the use of the beaches by red knots. The availability of horseshoe crab eggs was even more influential than the presence of human disturbance, predator occupation, and availability of other type
'"/>

Source:Virginia Tech


Page: 1 2

Related biology news :

1. US life expectancy about to decline, researchers say
2. Alzheimers cognitive decline slowed
3. Contaminants linked to sturgeon decline in Columbia river
4. HIV decline in Zimbabwe linked to behavioural change
5. Alaska seal pup diet may hold key to decline of population
6. Acid rain causing decline in sugar maples, say researchers
7. Alarming decline in Nepals rhinos and tigers in former Maoist stronghold
8. Steep oxygen decline halted first land colonization by Earths sea creatures
9. Climate change creates dramatic decline in red-winged black bird population
10. Individual differences in a clock gene predict decline of performance during sleep deprivation
11. Power-boosting signal in muscle declines with age
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Horseshoe crab decline threatens shorebird species

(Date:11/4/2014)... University of Utah engineers developed the first room-temperature fuel ... electricity without needing to ignite the fuel. These new ... off-grid power and sensors. , A study of the ... Society journal ACS Catalysis . , Fuel cells ... a fuel and an oxygen-rich source such as air. ...
(Date:11/4/2014)... – Temple University School of Medicine announced today ... an initiative funded by the Bill & Melinda ... of Obstetrics, Gynecology and Reproductive Sciences; and Vice ... University School of Medicine will pursue an innovative ... Blood Biomarkers to Assess Fetal Neurodevelopment.", Grand Challenges ...
(Date:11/4/2014)... A newly published research study examining only marketing ... of fast food restaurants has found that the ... disproportionately exposed to such marketing tactics. , Authored ... her colleagues, the study is the first to ... interior and exterior of fast food restaurants and ...
Breaking Biology News(10 mins):Jet-fueled electricity at room temperature 2Temple University School of Medicine receives Grand Challenges Explorations grant 2Fast food marketing for children disproportionately affects certain communities 2Fast food marketing for children disproportionately affects certain communities 3
... during pregnancy can have serious consequences for the foetal brain. ... by vitamin C supplements after birth. This is shown through ... the scientific journal PLOS ONE . Population studies ... the developed world suffer from vitamin C deficiency. Therefore, pregnant ...
... PHILADELPHIA Passing one,s genes on to the next generation ... that the body would work to ensure that the genes ... New research by biologists at the University of ... the body does exactly that. This protective role is fulfilled ...
... that can be injected into the body, carrying drugs or ... types of disease, including cancer. However, these injectable gels don,t ... MIT chemical engineers have now designed an injectable gel that ... network that makes the gel much more durable, allowing it ...
Cached Biology News:Fetus suffers when mother lacks vitamin C 2A class of RNA molecules protects germ cells from damage, Penn vet researchers show 2A class of RNA molecules protects germ cells from damage, Penn vet researchers show 3New injectable gels toughen up after entering the body 2
(Date:11/26/2014)... HOUSTON and PHILADELPHIA , ... the most demanding and unforgiving environments. Human exploration of ... cognitive performance to ensure mission safety and success, and ... cognitive performance for mission success, little is known about ... aspects of cognition are primarily affected. Now, ...
(Date:11/26/2014)... Winston-Salem, NC (PRWEB) November 26, 2014 ... Medical Advisory Board. PMG Research is a network of sites ... with access to over 2 million patient lives through its ... Research is comprised of 11 hub site locations in the ... , The first term of the board will ...
(Date:11/26/2014)... November 25, 2014 Continuing its award-winning ... earned three prestigious MarCom Awards for outstanding creative achievement ... a Platinum MarCom Award, the organization’s top honor, in ... St. Louis held in April of this year. The ... 14,000 attendees. Additionally, Nerium was awarded a Gold MarCom ...
(Date:11/26/2014)... SoundConnect , an award winning unified communications ... Darren Suders has joined the team as Director of ... partner program through innovative offerings, consistent partner ... brings more than 10-years of channel telecommunication experience to ... from policy development, to partner education and to expansion. ...
Breaking Biology Technology:Penn 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 4PMG Research Names Medical Advisory Board 2PMG Research Names Medical Advisory Board 3Nerium International™ Wins One Platinum, Two Gold MarCom Awards 2SoundConnect Appoints Director of Channel Development & Sales 2
... young company with a preventive solution to identity theft took ... Burrill Technology Business Plan Competition, but if area investors want ... act quickly. , , Din and Newport stand in ... Khaja M. Din, president IPIC (Internet Privacy & ...
... of capturing 10 percent of the stem cell technology market ... directing the Department of Commerce to spend at least $5 ... companies to Wisconsin. , ,Doyle said the executive order, signed ... to stem cell research. Proponents of stem cell research cite ...
... and services to the financial and health-benefits industries, said ... to $1.1 billion. , ,Net income was $116 million, ... in the first quarter of 2005 on $973 million ... included repurchasing 5.4 million shares of common stock and ...
Cached Biology Technology:Winner of Burrill competition courted by North Carolina investors 2Winner of Burrill competition courted by North Carolina investors 3Doyle authorizes $5 million to woo stem cell companies 2