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Amphibians in Medical News

Global Warming Will Result In the Extinction Of Amphibians

A fungal disease in frogs caused by global warming is resulting in the death of entire populations, and also driving them closer to extinction. The threat to biodiversity // as a result of emerging infectious diseases may also result in danger to human beings. The study published by the journ...

Ancient fossils shed light on anatomical changes accompanying evolution of first land vertebrates

...nt chapter in the evolution of life on land the transition from fish to amphibians. "One of the big questions at the moment is: where did modern amphibians come from?" said Clack. "One of the hypotheses is that they have evolved by paedomorphosis and miniaturization from early tetrapods. This study lends ...

Ten new amphibian species discovered in Colombia

...- Scientists today announced the discovery of 10 amphibians believed to be new to science, including a spiky-s...d no where else. The potentially new species of amphibians include three glass frogs of the Nymphargus, Cochr... of Environment Juan Lozano. Scientists consider amphibians important indicators of ecosystem health. With po...

New advancements in the use of adult, embryonic stem cells for tissue regeneration

...development of a tissue, organ or appendage, or to stimulate resident adult stem cells to do so. They argue that strong regenerators, such as fish and amphibians know how to do this naturally, and should be studied to learn what molecules are required for such stimulation or reprogramming. The counterparts of t...

Mice Can Sense Oxygen Through Their Skin

...oxygen tents to increase EPO and red blood cell levels, said Randall Johnson, of the University of California, San Diego. It's long been known that amphibians can breathe in part through their skin, but the finding that skin plays a role in oxygen sensing in mammals was a surprise, Johnson said. This suggest...

Synthetic peptoids hold forth promise for new antibiotics

...Academy of Sciences. Natural peptides Anti-microbial peptides are evolutionarily ancient infection fighters found in organisms from grasses to amphibians to humans. In the human body, the peptides show up in the mouth, lungs and intestines, and in body fluids like sweat and tears. Anti-microbial peptide...

Study expected to boost research for hearing and balance therapies

... CHARLOTTESVILLE, VA (September 25, 2007) Birds, fish and amphibians can do something that humans and other mammals generally cannot: re-grow damaged or lost inner ear hair cells. Loss of these cells causes hearing ...

Golf Courses Could Serve as Wildlife Sanctuaries If Managed Properly

...by eliminating bullfrog tadpoles. "As bullfrog cycles of metamorphosis take longer to complete (typically 12 months) than the cycles of other amphibians (typically one to four months), the bullfrog tadpoles have advantages in permanent ponds and can grow larger and more powerful, nudging out other spec...

Regrowth of Zebrafish's Tail Fin may Offer Clues for Treating Human Injuries

...repair minor injuries to bone, muscle, the tips of our toes and fingers, and the corneas of our eyes. Finding out more about the remarkable ability of amphibians and fish to re-grow complex parts might provide the information necessary to create treatments for people whose hearts, spinal cords, eyes or arms and...

Link between Fish and Mammal Immune Systems Revealed by Killer B cells

...in mammals. Further research also showed that a significant portion of amphibian B cells retained their digestive traits. "The immune systems of amphibians and fish are far less advanced than ours," Sunyer said. "When you only have a rudimentary adaptive immune system, it helps to have more phagocytic ce...
Amphibians in Medical Dictionary

Pathogen

...logy we have today. ... This pathogen also digests the blood cells hemoglobin stopping ... Batrachochytrium dendrobatidis is a pathogen of amphibians that has been ... Chemotaxis of the amphibian pathogen Batrachochytrium dendrobatidis and its ... This section includes food pathogens such ...

Melatonin

...ness ... melatonin n. A hormone derived from serotonin and produced by the pineal gland that stimulates color change in the epidermis of amphibians and Darkness stimulates the production of melatonin while light suppresses its activity. ... Many researchers also believe that melatonin leve...

Epididymis

... infertility ... Interestingly, 98% of men with CF are missing parts of the epididymis . ... The epididymis is rudimentary or absent in fish, amphibians and some reptiles. ... To form the epididymis , the Wolfian duct enlarges and develops a functional ... The epididymis functions as a storage...

Atria

...wards and Affiliations. Read ... Atria - Definition of Atria at Dictionary.com a free online dictionary with ... Mammals, birds, reptiles, and amphibians have two atria ; fish have one. ... atria ... Atrial flutter is an abnormality in the beating of the heart. ... The impulse travels across the ...
Amphibians in Biological News

Road losses add up, taxing amphibians and other animals

WEST LAFAYETTE, Ind. - When frogs hit the road, many croak. Researchers found more than 65 animal species killed along a short stretch of roads in a Midwestern county. Nearly 95 percent of the total dead were frogs and other amphibians, suggesting that road-related death, or road-kill, possibly...

Ancient amphibians left full-body imprints

Unprecedented fossilized body imprints of amphibians have been discovered in 330 million-year-old rocks from Pennsylvania. The imprints show the unmistakably webbed feet and bodies of three previously unknown, foot-long salamander-like critters that lived 100 million years before the first dinosau...

New findings on immune system in amphibians

This release is available in German . Krakow/Halle. Major Histocompatibility Complex (MHC) genes produce proteins that are crucial in fighting pathogen assault. Researchers from the Jagiellonian University in Krakow and from the Helmholtz Centre for Environmental Research (UFZ) character...

Climate change hastens extinction in Madagascar's reptiles and amphibians

New research from the American Museum of Natural History provides the first detailed study showing that global warming forces species to move up tropical mountains as their habitats shift upward. Christopher Raxworthy, Associate Curator in the Department of Herpetology, predicts that at least thre...

Ancient amphibians evolved a bite before migrating to dry land

Ancient aquatic amphibians developed the ability to feed on land before completing the transition to terrestrial life, researchers from Harvard University report this week in the Proceedings of the National Academy of Sciences. Their work is based on analysis of the skulls of the first amphibians...

African amphibians make extreme parental sacrifice: The skin off their backs

Just as baby mammals depend on their mothers' milk, the young of the African amphibian Boulengerula taitanus nourish themselves by stripping off and eating the fat-rich outer layer of their mothers' skin, according to an international team of researchers that includes University of Michigan biologi...

Scary ancient spiders revealed in 3-D models, thanks to new imaging technique

...ption by Eophrynus prestivicii , to make them a less tempting meal for the amphibians that would have recently emerged from the oceans onto land. The study's ...We think one creature could have responded to increasing predation from the amphibians by growing spikes, while the other responded by becoming an ambush predator...

Biologists rediscover endangered frog population

...fforts by California Department of Fish and Game to restore frog habitat renews hope of survival for this Southern California amphibian. Globally, amphibians are on the decline because of habitat loss, effects of climate change and the spread of a deadly pathogen called the chytrid fungus. The mountain yell...

New species of phallus-shaped mushroom named after California Academy of Sciences scientist

...sed on the evolutionary relationships, natural history, and biogeography of amphibians and reptiles. Recently, he has turned his attention to Sao Tome and Princi...ancisco - it hosts a number of plants, fungi, mammals, birds, reptiles, and amphibians found nowhere else on Earth. Since 2001, Drewes has organized four multidi...

Spring fishing season arrives... and with it, amphibian diseases

... a good model for understanding the consequences of unregulated movement of amphibians and their pathogens," says Collins. Examples of pathogen pollution are m...ease throughout North America, Europe and Southwest Asia. In the case of amphibians and reptiles, millions of kilograms of the animals may be shipped across th...
Amphibians in Biological Definition

Animal

...ch as sea stars , sea urchins , and sea cucumbers . The latter are dominated by the vertebrates , animals with backbones. These include fish , amphibians , reptiles , birds , and mammals . In addition to these, the deuterostomes also include the Hemichordata or acorn worms. Although they are not...

Brain

...ing complexity in the cerebral cortex as one moves up the phylogenetic and evolutionary tree . Primitive vertebrates, like fish, reptiles, and amphibians have cortices with less than six layers of neurons, a structure known as allocortex (Martin, 1996). More complex vertebrates like mammals have devel...

Cold-blooded

...ources of heat, such as solar radiation . As the environmental temperature increases, the animal's metabolic rate will increase. Lizards, fish, and amphibians are examples of ectotherms. Whereas an endotherm, or warm-blooded animal will use up to 98% of its energy for heat production, an ectotherm has all...

Herpetology

...ology concerned with the study of reptiles and amphibians , including their classification, ecology, behavio...ave surprisingly little else in common. Typically, amphibians have a permeable skin that assists in the exchan...s benefits to humanity in the study of the role of amphibians and reptiles in global ecology , in particular in...

Larva

... larva ( Latin ; plural larvae ) is a juvenile form of animal with indirect development , undergoing metamorphosis (for example, insects or amphibians ). The larva can look completely different from the adult form, for example, a caterpillar differs from a butterfly . Larvae often have special ...

Limbic system

...pothalamus as part of limbic system.) The limbic system is among the oldest parts of the brain in evolutionary terms: it can be found in fish , amphibians , reptiles and mammals . The pleasure center is located in the limbic system. It is involved in sexual arousal and in the "high" derived from...

Lung

...ilian lungs Amphibian lungs The lungs of most frogs and other amphibians are simple balloon-like structures, with gas exchange limited to the outer surface area of the lung. This is not a very efficient arrangement, but amphibians have low metabolic demands and also frequently supplement their oxygen supp...

Animal

...ch as sea stars , sea urchins , and sea cucumbers . The latter are dominated by the vertebrates , animals with backbones. These include fish , amphibians , reptiles , birds , and mammals . In addition to these, the deuterostomes also include the Hemichordata or acorn worms. Although they are not...

Thermoregulation

...en use natural antifreeze to resist ice crystal formation in their tissues; amphibians (also ectotherms) must cope with the loss of heat through their moist skins by evaporative cooling; reptiles, like amphibians must warm their bodies by behavioral adaptations; the stratum corneum they ...
Amphibians in Biological Dictionary

Renal portal system

...system : renal portal vein iliac vein pelvic veins ... How does the renal portal system of crocodilians & birds differ from that of amphibians & fish? What is the fate of the renal portal system in mammals? ... Characterization of the Renal - Portal System of the Common Green...

Primitive streak

...e the primitive streak disappears. ... The primitive gut that forms during gastrulation in the developing blastula is ... blastopore in amphibians and fish, and the primitive streak in birds and mammals. ... Britannica online encyclopedia article on primitive streak (embryology), ...ur...

Poikilothermic

...lism rate in the poikilothermic animal drops. ... 1. Scientific evidence supports the theory that birds evolved from _. protozoans mammals amphibians reptiles 2. Feathers and hair are composed of a protein ... ... Center | Glossary | Poikilothermic . Browse by Letter ... Poikilothermic . havi...

Mammals

... Mammal , animal that raises its young on milk. ... Most mammals are covered with hair or fur, and most have specialized teeth that ... Birds amphibians Arthropods Reptiles Mammals . Education ... Look below and learn facinating facts about our marvelous mammals ! ... Mammals - info and online g...

Invertebrates

... Invertebrate photos and facts. Brought to you by the National Zoo| FONZ. ... Invertebrates . Kids' Farm. North America. Ocean Living. Reptiles and amphibians ... Learn all you wanted to know about invertebrates with pictures, videos, photos, facts, and news from National Geographic. ... of all animals...

Herpetology

... Herpetology over 500 species of reptiles and amphibians ... With selected herpetology and herpetocult...n Herpetology over 500 species of reptiles and amphibians ... Instead, persons interested in herpetology...s according to ... " Herpetology at the Burke. amphibians of Washington. Reptiles of Washington. Research .....

FISH

... information. Dedicated to the conservation of natural resources, fish , wildlife, and plants. Dedicated to the scientific study of fishes , amphibians and reptiles. From aquariums to aquarium stands, fish food to filters, heaters to aquarium ... Saltwater Aquariums Freshwater Aquariums Aquarium ...

Cloaca

... for the intestinal, reproductive and urinary tracts of certain animal species. The word comes from Latin, and means sewer. All birds, reptiles, and amphibians possess this... Cloaca exhibition in the New Museum of Contemporary Art in New York (2002) Cloaca - An Interview with Josefina Ayerza Laca...

Avidin

... Avidin is a tetrameric protein produced in the oviducts of birds, reptiles and amphibians deposited in the whites of their eggs. In chicken egg white, avidin makes up approximately 0.05% of total protein . The tetrameric... NeutrAv...

Amnion

... the amniotic sac that surrounds and protects an embryo. It is developed in reptiles, birds, and mammals, which are hence called “Amniota”; but not in amphibians and fish (Ichthyopsida), which are consequently termed “Anamniota”. The... At Amnion Crisis Pregnancy Center in Bryn Mawr, you won't find anyon...
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