Crab Current Events

Crab Current Events, Crab News Articles.
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Crab nebula of life
Researchers Chu, et.al., have constructed the most complete and extensive crab sequence dataset to date. Their recalibrated crab gene tree using DNA and mitochondrial sequences from 140 species and 58 crab families provides some important new insights into the timing and diversity of crab evolution. (2014-02-14)

This hawk likes crab for dinner
This is the first report of a red-shouldered hawk attacking and presumably consuming any species of crab and the first report of probable ghost crab predation by a raptor in North America. (2019-05-02)

PNNL findings may help preserve Dungeness crab
A recent Pacific Northwest National Laboratory study has found that salinity levels in the Columbia River estuary may affect crab abundance in the river, a finding that may help protect Dungeness crab in the Columbia. (2003-05-30)

UGA researchers explain recent decline in Georgia's blue crab population
Two researchers at the Skidaway Institute of Oceanography in Savannah have offered an explanation for the recent decline in Georgia's blue crab population that has devastated one of the state's most important coastal fisheries. (2004-11-23)

Horseshoe crabs survival rate after biomedical bleeding is high
An article appearing the the current issue of the Review in Fisheries Science reports the general biology, ecology, and life history of the horseshoe crab. (2002-05-07)

Furry-clawed Asian crabs found in Delaware and Chesapeake Bays
Chinese mitten crabs, first reported in the Chesapeake Bay, are more widespread than initially thought. Four crabs have now been caught in Delaware Bay during the last week of May 2007, and may occur in other waters of the US east coast. (2007-06-04)

When enemies come to help
The enemy of my enemy is my friend. Now researchers at the University of Zurich show that this principle also holds for crab spiders and flowering plants. While it's true that the spiders do eat or drive away useful pollinators such as bees, they're also attracted by floral scent signals to come and help if the plant is attacked by insects intent on eating it. (2018-04-10)

First view of giant crabs - at home on the slope
Australian scientists have had their first view of the habitats and ecosystem that support Australia's largest commercial crab - the (2003-11-26)

Most detailed image of the Crab Nebula
A new Hubble image - among the largest ever produced with the Earth-orbiting observatory - gives the most detailed view so far of the entire Crab Nebula. The Crab is arguably the single most interesting object, as well as one of the most studied, in all of astronomy. The image is the largest ever taken with Hubble's WFPC2 workhorse camera. (2005-12-01)

Horseshoe crab decline threatens shorebird species
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. (2006-02-21)

West coast dungeness crab stable or increasing even with intensive harvest, research shows
Fishermen from California to Washington caught almost all the available legal-size male Dungeness crab each year in the last few decades. However, the crab population has either remained stable or continued to increase, according to the first thorough population estimate of the West Coast Dungeness stocks. (2020-03-06)

Caught in a trap: bumblebees vs. robotic crab spiders
Bumblebees learn to avoid camouflaged predators by sacrificing foraging speed for predator detection, according to scientists from Queen Mary, University of London. (2008-09-04)

Climate change affects horseshoe crab numbers
Having survived for more than 400 million years, the horseshoe crab is now under threat -- primarily due to overharvest and habitat destruction. However, climatic changes may also play a role. Researchers from the University of Gothenburg reveal how sensitive horseshoe crab populations are to natural climate change in a study recently published in the scientific journal Molecular Ecology. (2010-10-04)

Separate polarization and brightness channels give crabs the edge over predators
Fiddler crabs see the polarization of light and this gives them the edge when it comes to spotting potentials threats, such as a rival crab or a predator. Now researchers at the University of Bristol have begun to unravel how this information is processed within the crab's brain. The study, published in Science Advances today, has discovered that when detecting approaching objects, fiddler crabs separate polarization and brightness information. (2019-08-21)

Spectacular 'honeycomb heart' revealed in iconic stellar explosion
A unique 'heart-shape', with wisps of gas filaments showing an intricate honeycomb-like arrangement, has been discovered at the centre of the iconic supernova remnant, the Crab Nebula. Astronomers have mapped the void in unprecedented detail, creating a realistic three-dimensional reconstruction. The new work is published in Monthly Notices of the Royal Astronomical Society. (2021-02-10)

Crabs are key to ecology and economy in Oman
The intertidal mudflats of Barr Al Hikman, a nature reserve at the south-east coast of the Sultanate Oman, are crucial nursery grounds for numerous crab species. In return, crabs are a vital element of the ecology, as well as the regional economy, a new publication in Hydrobiologia shows. 'These important functions of the crabs should be considered when looking at the increasing human pressure on this nature reserve', first author and NIOZ-researcher Roeland Bom says. (2020-10-08)

New species of terrestrial crab found climbing on trees in Hong Kong
A new species of terrestrial crab has been found to climb trees on the eastern coast of Hong Kong. Its squarish predominantly dark brown carapace and very long slender legs are what sets it apart from closely related species. The discovery of the tiny crustacean once again proves how little is known about the diversity of these crabs in Hong Kong. The new species is described in the open access journal ZooKeys. (2017-03-21)

Crab from the Chinese pet market turns out to be a new species of a new genus
Shimmering carapaces make crabs attractive to pet owners. To answer the growing demand, fishermen collect and trade crustaceans, often not knowing what exactly they have handed over to their clients. Luckily for science and nature alike, however, the authors of a paper now published in the open-access journal ZooKeys have spotted such a crab and recognized its peculiarities to prove it as a new species and even a new genus from southern China. (2016-09-07)

Turning freshwater farm ponds into crab farms
Work by researchers at North Carolina State University is leading to a new kind of crab harvest -- blue crabs grown and harvested from freshwater ponds, instead of from the sea. (2008-10-09)

Blue crab baby sizes and shapes influence their survival
Like people, blue crabs aren't all the same sizes and shapes. Now Rutgers scientists have discovered substantial differences in the body structures of larval crab siblings and among larvae from different mothers. And that can mean the difference between an early death and survival into adulthood for this important commercial and recreational species. (2018-10-17)

A new coral-inhabiting gall crab species discovered from Indonesia and Malaysia
Fieldwork in Indonesia and Malaysia by researcher Sancia van der Meij from Naturalis Biodiversity Center in the Netherlands lead to the discovery of a new coral-dwelling gall crab. The new gall crab, named Lithoscaptus semperi, was discovered inhabiting free-living corals of the species Trachyphyllia geoffroyi on sandy bottoms near coral reefs. The study was published in the 500th issue of the open-access journal ZooKeys. (2015-04-27)

Can Dungeness crab and eelgrass help improve management of our marine resources?
NOAA's Anne Guerry will discuss the benefits people obtain from ecosystems in managing marine resources in her AAAS presentation (2008-02-16)

Decline of shorebird linked to bait use of horseshoe crabs
Declining numbers of a shorebird called the red knot have been linked to bait use of horseshoe crabs. (2009-02-17)

Fiddler on the roof?
The fiddler crab, Uca pugnax, has migrated nearly 50 miles north of its supposed natural range along the US East Coast. This may be another sign of climate change. (2014-11-21)

NUS study explains how a spider and a pitcher plant can benefit from collaboration
Two recent studies by ecologists from the National University of Singapore have shed light on the relationship between the slender pitcher plant and its 'tenant', the crab spider Thomisus nepenthiphilus, providing insights to the little known foraging behaviours of the spider. (2018-11-11)

Meet Callichimaera perplexa, the platypus of crabs
The crab family just got a bunch of new cousins -- including a 95-million-year-old chimera species that will force scientists to rethink the definition of a crab. (2019-04-24)

Dinosaur, crab fossils reveal ecosystem secrets
For centuries, they wouldn't be caught dead next to each other. But now a team of geologists directed by Joshua Smith, Ph.D., assistant professor of earth and planetary sciences at Washington University in St. Louis, have found a well-preserved fossil of a crab within inches of a tail vertebra from a massive plant-eating dinosaur. (2003-03-10)

Crab pulsar emits light at higher energies than expected
Pulsars -- highly magnetized, rotating stars -- were first discovered more than 40 years ago, and are now believed to be a type of stellar leftover, or remnant -- in this case, a neutron star -- that results from the explosion and gravitational collapse of a more massive star. In the Oct. 7 issue of Science, astrophysicists with VERITAS report an unexpected finding in the Crab Pulsar, which is the central star in the Crab Nebula in the constellation of Taurus. (2011-10-11)

Observatories combine to crack open the Crab Nebula
Astronomers have produced a highly detailed image of the Crab Nebula, by combining data from telescopes spanning nearly the entire breadth of the electromagnetic spectrum. (2017-05-10)

Invasive crabs help Cape Cod marshes
Ecologists are wary of non-native species, but along the shores of Cape Cod where grass-eating crabs have been running amok and destroying the marsh, an invasion of predatory green crabs has helped turn back the tide in favor of the grass. The counter-intuitive conclusions appear in a new paper in the journal Ecology. (2013-04-03)

New species of tree living crab found in Western Ghats
A recent research paper in The Journal of Crustacean Biology reveals a new genus and new species of tree crab in Kerala, southern India. Known scientifically as the 'Kani maranjandu,' it is substantially different from other congeners. Its distinguishing characters include: the structure of its hard upper shell, as well as its male abdominal structure and reproductive parts, and of course, its diagnostic elongated walking legs, which no other genus has. (2017-04-03)

Caught red-handed: The 'candy-striped hermit crab' is a new species from the Caribbean
A new secretive species of hermit crab living in crevices shared with moray eels and flaming reef lobsters, has been discovered in the southern Caribbean. The striped color pattern reminded the author of candy canes, hence the common name 'candy-striped hermit crab.' Observations of live specimens suggest that the new hermit crab engages in 'cleaner' activities, or is a 'den commensal' with moray eels. The study is published in the open-access journal ZooKeys. (2017-01-26)

Cranky crabs in broken shells often have the upper claw in fights
Sheer aggression rather than pure muscle strength often gives hermit crabs living in broken shells the edge during a fight. Crabs living in broken shells value an intact shell and will fight more aggressively to get a better one, according to research conducted by Guillermina Alcaraz of the Universidad Nacional Autónoma de México in Mexico and Gastón Ignacio Jofre of Texas A&M University in the US, and published in Springer's journal Behavioral Ecology and Sociobiology. (2017-05-04)

Triggerfish learns to catch more diverse food
In probably the first observation of its kind, a tricky triggerfish is seen beaching itself before attacking a crab walking along the shoreline. (2020-10-19)

King crabs threaten seafloor life near Antarctica
King crabs and other crushing predators are thought to have been absent from cold Antarctic shelf waters for millions of years. Scientists speculate that the long absence of crushing predators has allowed the evolution of a unique Antarctic seafloor fauna with little resistance to predatory crabs. A recent study indicates that one species of king crab has moved 120 km across the continental shelf in West Antarctica and established a large, reproductive population in the Palmer Deep along the west Antarctic Peninsula. (2011-09-07)

Microplastics affect sand crabs' mortality and reproduction, PSU study finds
Sand crabs, a key species in beach ecosystems, were found to have increased adult mortality and decreased reproductive success when exposed to plastic microfibers, according to a new Portland State University study. (2020-01-17)

Estuaries protect Dungeness crabs from deadly parasites
Parasitic worms can pose a serious threat to the Dungeness crab, a commercially important fishery species found along the west coast of North America. The worms are thought to have caused or contributed to the crash of the crab fishery of central California during the last half century. New research shows that infected crabs can rid themselves of parasites by moving into the less salty water of estuaries. Low salinity kills the worms creating a parasite refuge for the crabs. (2015-05-22)

Ocean acidification puts NW Dungeness crab at risk
Ocean acidification expected to accompany climate change may slow development and reduce survival of the larval stages of Dungeness crab, a key component of the Northwest marine ecosystem and the largest fishery by revenue on the West Coast, a new study has found. (2016-05-17)

New crab species shares name with 2 'Harry Potter' characters and a hero researcher
While not much is known about the animals living around coral reefs, ex-Marine turned researcher Harry Conley would often take to the island of Guam, and dig deep into the rubble to find fascinating critters as if by magic learnt at Hogwarts. Years after his discoveries and his death, a secret is revealed on the pages of the open access journal ZooKeys -- a new species and genus of crab, Harryplax severus. (2017-01-23)

First species of yeti crab found in Antarctica
The first species of yeti crab from hydrothermal vent systems of the East Scotia Ridge in the Southern Ocean, Antarctica, is described. (2015-06-24)

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