Tag: "mollusk" at biology news

Fossils Show British Columbia Was Once 2,000 Miles South

...he discovery of pearly fossil shells of an extinct mollusk on twoislands off the eastern coast of Vancouver Island give clear evidence that theregion was once nearly 2,000 miles to the south. "Everything that we now recognize as coastal British Columbia was onceoff the coast of what is now Mexico or...

Fish Farmers Must Learn Zebra Mussel Prevention From A To Z

...ens of millions of dollars of damage the miniature mollusk has inflicted on industrial and municipal water users, it's no wonder aquaculture managers are wondering when it's their turn. Illinois-Indiana Sea Grant aquaculture specialist LaDon Swann says "Anytime now." The fingernail-sized mussel's ability to ...

Researchers characterize mollusk insulin gene, find unique peptide

... and characterized an insulin gene from the marine mollusk Aplysiacalifornica. The gene's structure -- though similar in form and function tothat of human insulin -- possesses an additional peptide, the purpose of whichremains unknown. "Almost all animals, from corals to humans, make and use insulin as a ho...

Florida scientist finds eight new snails that may give water quality clues

...es about the water we use. Fred Thompson, a UF mollusk expert, has found six tiny new species in springs at the Seminole State Forest near Apopka and two in Holmes Creek in the Florida Panhandle. "It's fascinating that there's so much about our world in our own back yard about which we know so little...

Finding by Syracuse University and University of Michigan researchers reveals secret to mass extinction events

... applying the same techniques on both otoliths and mollusk shells, to determine seasonal variations in temperature in the North Sea with colleagues from Belgium and on Seymour Island in Antarctica with Lohmann and other colleagues. From that research, they hope to understand how climate change affected evolu...

Researchers uncover secret to mass extinction events

... applying the same techniques on both otoliths and mollusk shells, to determine seasonal variations in temperature in the North Sea with colleagues from Belgium and on Seymour Island in Antarctica with Lohmann and other colleagues in an effort to understand how climate change affected evolution and extinctio...

Seven decades of management virtually wipes out life from the tidal flats of the Colorado River Delta

...nd, for instance. Yet, Mulinia was the most common mollusk in the past, as it represents about 90 percent of two trillion shells found in the delta. Even after adding all small mollusks and all shelled nonmollusk macrofauna to life forms being counted, the current density of the benthos (18 per square meter)...

URI professor investigates the muscle behind blue mussels

...king the world windier and the waves stronger. The mollusk will either have to get stronger by producing more threads or fall off and die. Will the blue mussel whose species is dominant throughout the world maintain enough muscle actually extra cellular fibers -- to remain steadfast or simply go with the fl...

July media highlights: GEOLOGY and GSA TODAY

...n the frequency of El Nio from the distribution of mollusk shells in archaeological sites. Between ca. 5.8 and 3.0 ka, El Nio apparently occurred less frequently than it does today. At that time, people along the coast of Peru began living in settled communities and building increasingly large temple mounds ...

February media highlights - GSA Bulletin

...ape. Multivariate hierarchical analyses of Miocene mollusk assemblages of Europe: Paleogeographic, paleoecological, and biostratigraphic implications. Michal Kowalewski et al. Department of Geological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA. Pages 239-25...

Meeting ecological and societal needs for freshwater

...in the Sea of Cortez, and the abundance of bivalve mollusk populations has dropped 94 percent from 1950 values. Water temperature can also change dramatically downstream of dams. Declines in the variability of monthly temperature along with reductions in species richness have been observed in the downstrea...

Clues from analysis of fish bones supports theory of climate shift 5000 years ago, onset of El Nio

...ir conclusions were based on the identification of mollusk and fish remains from archeological sites. Some critics of that paper suggested that the mollusks might have lived in warm water embayments that would not accurately reflect temperatures in the open ocean. "The evidence in this paper, based on fish...

Report to aid nation in managing freshwaters

...mouth of the Gulf of California, where the bivalve mollusk muscles population has dropped by 94 percent from 1950. In other areas of concern freshwater temperatures have dropped dramatically. "This has resulted in the development of a nonnative trout population and an unusual food web more commonly found in ...

Encrustation provides clues about ancient seas

...nted a comparison of the encrustation of a bivalve mollusk (Macoma) with the encrustation of an articulate brachiopod (Bouchardia) from the coast of Brazil. "This is the only tropical / subtropical site where both bivalves and brachiopods occur in abundance in the present day, or at least, the only one we kn...

Feeder-free system for maintaining pluripotency in embryonic stem cells pioneered

...inning. A marine animal belonging to the gastropod mollusk group is the original source of the compound now in use in the new feeder-free system. The natural molecule from which the new compound has now been synthesized has been harvested for over 2500 years from the creature, known as the red mollusk, as a ...

Report in BioScience details global decline of nonmarine mollusks

...roximately 24,000 terrestrial and 7,000 freshwater mollusk species for which valid descriptions exist. There are probably 11,000 to 40,000 undescribed terrestrial species and 3,000 to 10,000 undescribed freshwater species. Even the lower estimates exceed the number of all known species of birds, and the hig...

Long-forgotten samples may help save species

...rly inept attempt at biological control," said U-M mollusk expert Diarmaid Ó Foighil. The trouble started in 1975 when the predatory rosy wolf snail was deliberately introduced to many South Pacific islands to control an agricultural pest. The problem was, the rosy wolf snail had a bigger appetite...

Penguins ingest mollusk shells to obtain calcium for thicker eggshells

...eing laid, female penguins have significantly more mollusk shells, mainly clams and mussels, in their stomachs than males do. The mollusk shells gradually leach calcium used to form eggshells. Penguins typically nest on hard surfaces near...

JGI announces community sequencing program portfolio

...Along with the polychaete worm, Capitella, and the mollusk Lottia, also selected, these are expected to be the first representatives sequenced from the large animal group dubbed the Lophotrochozoa. This group, comprising about one third of all animal phyla, promises to reveal many of life's processes and to...

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