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sharks in Medical News

Dr. Susan Lark's Squalane Now Made From Olives, Not Sharks

Dr. Susan Lark is proud to announce that she is reformulating her squalane skin care line. The new line will contain squalane sourced from olives rather than sharks. Potomac, MD (PRWEB) January 5, 2009 -- Dr. Susan Lark is proud to announce that she is reformulating her...

Researchers Document First Case of Virgin Birth in Sharks

Researchers have documented the first case of virgin birth in cartilaginous fish, after busting the mystery surrounding the birth of a shark in an aquarium, that had only female sharks which had no contact with a male shark for three years. The birth of the pup at Omaha's Henry Doorly Zoo,...

Monterey Bay Aquarium Channels Its Way to Kids at Packard Children's

... Penguins, fish, sharks and more now on hospital's PackardVisionsystem PALO ALTO, Calif., Marc...d the penguins on the "penguin cam." Or, see and hear divers feed the fish, sharks and other sea creatures through the Living Kelp Forest Exhibit's "kelp cam....

What's the Story With This Storyteller?

...pirates of the writing world, myself, I felt I needed to develop a safe haven for writers to blast their feelings, including anger, regarding the many sharks that have appeared on the scene." Patti remains supportive of women around the world, and presently sponsors four women through Women for Women Inte...

Red Wings Host Breast Cancer Awareness Night

...e/ -- The Detroit Red Wings will host the team's First Annual Breast Cancer Awareness Night on Friday, October 26, when the team takes on the San Jose sharks at Joe Louis Arena. Doors open at 6 p.m. for the 7:30 p.m. game. The game is part of the National Hockey League's Hockey Fights Cancer month when all ...

Genes Associated With Limb Development is More Primitive Than Believed

...a proxy for a more primitive ancestor, as these fish have an elaborate fin skeletal pattern similar to that seen in more primitive vertebrates such as sharks and many fossil fish. The researchers studied the development of paddlefish fins to test whether the genes activated to make hands and feet in...

UF scientists Throw light on the origin of vertebrate skeleton

...s, including humans. "It was thought collagen was a relatively recent invention in vertebrate evolution that unites us with reptiles, amphibians, sharks and bony fishes, while the lamprey skeleton was based on quite different proteins," said Martin Cohn, Ph.D., a developmental biologist and associate p...

Marine Reserves Protect Coral Reefs

...iving in the Exuma Cays Land and Sea Park was fun because a large number of sharks turned up to watch us work. sharks have been heavily fished on most coral reefs so it's always a thrill to vis...
sharks in Medical Technology

Scientists Discover Why Teeth Form in a Single Row

... ROCHESTER, N.Y., Feb. 26 /PRNewswire-USNewswire/ -- A system of opposing genetic forces determines why mammals develop a single row of teeth, while sharks sport several, according to a study published today in the journal Science. When completely understood, the genetic program described in the study may...
sharks in Biological News

Geographic profiling applied to track hunting patterns of white sharks in South Africa

VIRGINIA KEY, Fla. -- Predation is one of the most fundamental and fascinating interactions in nature, and sharks are some of the fiercest predators on Earth. However, their hunting pattern is difficult to study because it is rarely observed in the wild. As a result, shark predatory behavior has r...

Can certain metals repel sharks from fishing gear?

Sharks in captivity avoid metals that react with seawater to produce an electric field, a behavior that may help fishery biologists develop a strategy to reduce the bycatch of sharks in longline gear. Shark bycatch is an increasing priority worldwide given diminished populations of many shark spe...

Deep-sea sharks wired for sound

Deep-sea sharks have been tagged and tracked and their habitats precisely mapped in world-first research to test the conservation value of areas closed to commercial fishing. Last month scientists from the CSIRO Wealth from Oceans National Research Flagship fitted acoustic tags to 50 gulper sharks...

Oceanic sharks worldwide at serious risk from high-seas fishing, rising demand for shark products

NEW YORK CITY -Oceanic shark populations worldwide are declining from destructive high-seas commercial fishing practices and a rising global demand for shark products (mainly fins and meat), with some shark populations severely depleted and only a few stable or recovering, according to a comprehen...

From Jack the Ripper to great white sharks

What do great white sharks have in common with serial killers? Refined hunting skills, according to a paper published today in the Zoological Society of London's Journal of Zoology . A team of US-based researchers have found that sharks hunt in a highly focused fashion, just like serial crimin...

UIC biologists use DNA to study migration of threatened whale sharks

Whale sharks -- giants of the fish world that strike terror only among tiny creatures like the plankton and krill they eat -- are imperiled by over-fishing of the species in parts of its ocean range. That threat is underscored in a new study from geneticists led by Jennifer Schmidt, University ...

Photo-monitoring whale sharks

Up to 20 meters long and weighing as much as 20 tons, its enormous size gives the whale shark (Rhincodon typus) its name. Known as the gentle giant for its non-predatory behavior, this fish, with its broad, flattened head and minute teeth, eats tiny zooplankton, sieving them through a fine mesh o...

New research shows sharks use their noses and bodies to locate smells

Sharks are known to have a keen sense of smell, which in many species is critical for finding food. However, according to new research from Boston University marine biologists, sharks can not use just their noses to locate prey; they also need their skin – specifically a location called the latera...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

Fewer big sharks in the oceans mean that bay scallops and other shellfish may be harder to find at the market, according to an article in the March 30 issue of the journal Science, tying two unlikely links in the food web to the same fate. A team of Canadian and American ecologists, led by world...

Triple threat: World fin trade may harvest up to 73 million sharks per year

The first real-data study of sharks harvested for their valuable fins estimates as few as 26 million and as many as 73 million sharks are killed each year worldwide--three times higher than was reported originally by the United Nations, according to a paper published as the cover story in the Octob...
sharks in Biological Definition

Carnivore

...rds, like vultures Several species of waterfowl including gulls , penguins , pelicans and storks Frogs Snakes Crocodilians sharks and many other species of fish Toothed whales Octopuses and squid Spiders Mantophasmatodea , Reduviidae and other insects ...

Convergent evolution

...cquire similar characteristics through their evolution in similar ecosystems, but not at the same time ( dorsal fins of extinct ichthyosaurs and sharks ). Parallel evolution occurs when two independent species evolve together at the same time in the same ecospace and acquire similar characteristic...

Human

...or encephalization quotient (EQ) of all animals, with the tree shrew having the highest [8] and the bottlenose dolphin very similar to humans. ( sharks have the highest for a fish ; and octopi the highest for an invertebrate ). The human ability to abstract may be unparalleled in the animal ki...

Convergent evolution

...cquire similar characteristics through their evolution in similar ecosystems, but not at the same time ( dorsal fins of extinct ichthyosaurs and sharks ). Parallel evolution occurs when two independent species evolve together at the same time in the same ecospace and acquire similar characteristic...

Ichthyology

... branch of zoology devoted to the study of fish . This includes the bony fish ( Osteichthyes ), the cartilaginous fish ( Chondrichthyes ) such as sharks and rays , and the jawless fish ( Agnatha ). Since there are as many species of fish as all other vertebrates put together, and they have been evo...

Marine biology

...: sardines , anchovy , tuna , clownfish (also known as anemonefish), and bottom fish which include halibut and ling cod . Predators include sharks and barracuda . Marine mammals There are five main types of marine mammals. Cetaceans include toothed whales (Suborder Odontoceti )...

Parallel evolution

...bes how independent species acquire similar characteristics through their evolution in similar ecosystems, but not at the same time ( dorsal fins of sharks and ichthyosaurs ). A similar banding pattern that is found in almost all species of moths is another example of parallel evolution. Related ...

Skeleton

...d nose are shaped by cartilage. Some organisms have a skeleton consisting entirely of cartilage and without any calcified bones at all, for example sharks . The bones or other rigid structures are connected by ligaments and connected to the muscular system via tendons . Hydrostatic skeletons are s...
sharks in Biological Dictionary

Thermoregulation

...ur thermoregulation primer, there is ... THERMOREGULATION ––THE SCIENCE ... An introduction to the biology of thermoregulation in fish and sharks ... Behavioural thermoregulation occurs when a fish actively seeks ... Thermoregulation ... Thermoregulation in Sheep. Michele Jones. Brade...
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