imprimir | pdf             intranet                                                                                                            

Libros y News

            

 

Libros de biología evolutiva y genética de poblaciones (objeto gráfico -Widget- de Amazon)




 

Presentación | Evolución biológica | Genética poblaciones | Creación vs Evolución | Selección natural I | Selección natural II | Biodiversidad-Evo | Senescencia | ADN egoísta | Altruismo y SN | Reseña histórica | Los nombres | Frases | Resúmenes | Enlaces | Libros y News | Autor | 





Ensayos sobre la evolución biológica
Autor: Antonio Barbadilla
Universitat Autònoma de Barcelona

 

 

Science Daily:
Evolutionary Biology  News




Evolutionary Biology
Recent Headlines

Headline (Posted) Abstract
Ocean channel in Bahamas marks genetic divide in Brazilian free-tailed bats (18 Aug 2017) Brazilian free-tailed bats are expert flyers, capable of migrating hundreds of miles and regularly traveling more than 30 miles a night. But they pull up short at a narrow ocean channel that cuts across the Bahamas, dividing bat populations that last shared an ancestor hundreds of thousands of years ago.

Mechanisms explaining positional diversity of the hindlimb in tetrapod evolution (18 Aug 2017)
Elucidating how body parts in their earliest recognizable form are assembled in tetrapods during development is essential for understanding the nature of morphological evolution. Researchers found in eight tetrapod species that the position of the sacral vertebrae and the hindlimbs is determined by the initiation timing of Gdf11 gene expression. Th [+]


The laws of attraction: Pheromones don't lie, fruit fly research suggests (17 Aug 2017) For the first time, scientists have shown that a female fruit fly's pheromone signals can actually tell males how much energy her body has invested in egg production versus in storing away energy for her own survival. And it's a signal that she can't change in order to make herself more attractive.

New gene catalog of ocean microbiome reveals surprises (17 Aug 2017) Oceanographers report completing the largest single-site microbiome gene catalog constructed to date. With this new information, the team discovered nutrient limitation is a central driver in the evolution of ocean microbe genomes.

‘Euro Devil’: Fossil of carnivorous marsupial relative discovered in E Europe (17 Aug 2017) Scientists have discovered fossil remains of a new carnivorous mammal in Turkey, one of the biggest marsupial relatives ever discovered in the northern hemisphere.

Evolutionary history of imperiled salmon stocks (16 Aug 2017) New technologies for analyzing DNA may transform how imperiled species are considered and managed for conservation protection, according to a study. These technologies can be applied to a wide range of species around the world -- from mushrooms to walruses -- but the study focuses on two iconic species of Pacific salmon: steelhead and chinook.

Modern genetic sequencing tools give clearer picture of how corals are related (16 Aug 2017) As corals face threats from ocean warming, a new study uses the latest genetic-sequencing tools to help unravel the relationships between three similar-looking corals.

New plant discovered in Shetland (16 Aug 2017) Scientists have discovered a new type of plant growing in Shetland -- with its evolution only having occurred in the last 200 years.

Frogs that adapt to pesticides are more vulnerable to parasites (15 Aug 2017) Amphibians can evolve increased tolerance to pesticides, but the adaptation can make them more susceptible to parasites, according to a team of scientists.

Understanding antibiotic resistance (15 Aug 2017)
Researchers have uncovered new insights into how bacteria respond to stress. When deprived of nutrients, strains of the bacterium Streptococcus pneumoniae mount a coordinated defense. When exposed to antibiotics, the bacterial response is highly disorganized, revealing the bacteria are far less familiar with antibiotics and do not recognize how to [+]


How head-on collisions of DNA protein machines stop replication (15 Aug 2017)
Head-on collisions between the protein machines that crawl along chromosomes can disrupt DNA replication and boost gene mutation rates. This may be one of the ways bacteria control their evolution by accelerating mutations in key genes when coping with new conditions. Some mutations may help bacteria survive hostile environments, resist antibiotics [+]


New genomic insights reveal a surprising two-way journey for apple on the Silk Road (15 Aug 2017) New research reveals surprising insights into the genetic exchange along the Silk Road that brought us the modern apple.

Viruses up their game in arms race with immune system (14 Aug 2017)
Myxoma virus -- introduced to control the rabbit population in Australia in 1950 -- has developed a deadly ability to suppress the immune response in host rabbits. This example of an evolutionary arms race highlights the potential for escalating virus virulence and host resistance to produce more dangerous viruses with implications for agriculture [+]


Meadow of dancing brittle stars shows evolution at work (14 Aug 2017) Newly-described fossil shows how brittle stars evolved in response to pressure from predators, and how an 'evolutionary hangover' managed to escape them.

Scientists map sex chromosome evolution in pathogenic fungi (11 Aug 2017)
Researchers recently mapped the evolutionary turning point that transformed the pathogenic Cryptococcus fungus from an organism with thousands of sexes to only two. They found that during evolution, a reshuffling of DNA known as translocation brought together separate chunks of sex-determining genes onto a single chromosome, essentially mimicking t [+]


Chemical profile of ants adapts rapidly (11 Aug 2017) Biologists recently established that ants can adapt their hydrocarbon profile quickly during the course of evolution and rapidly adapt to external selection pressures.

How goldfish make alcohol to survive without oxygen (11 Aug 2017) Scientists have uncovered the secret behind a goldfish's remarkable ability to produce alcohol as a way of surviving harsh winters beneath frozen lakes.

Innovations enhance genetic analysis of individual cells (10 Aug 2017) Single cell genomics technology has given scientists the ability to individually read the genetic blueprints of cells, the most fundamental units of life.

First mutant ants shed light on evolution of social behavior (10 Aug 2017) Scientists disrupted a gene essential for sensing pheromones, resulting in severe deficiencies in the ants' social behaviors and their ability to survive within a colony.

Origins of DNA folding suggested in archaea (10 Aug 2017) Proteins in archaea bend strands of DNA in a way that's similar in eukaryotes, new research reveals. That similarity hints at the evolutionary origin of the elaborate folding that eukaryotic cells use to cram their genome into a nucleus.

San Salvador pupfish acquired genetic variation from island fish to eat new foods (10 Aug 2017) Pupfish living in salty lakes on San Salvador Island were able to diversify into multiple species with different eating habits, in part, by interbreeding with pupfish from other islands in the Caribbean.

New technique searches 'dark genome' for disease mutations (10 Aug 2017) Researchers have developed a new methodology for identifying disease-causing genetic mutations in the non-coding region of the genome. This portion of the genome has remained uninterpretable until now.

New methods for analyzing gene function (10 Aug 2017) Scientists have developed new methods to produce and analyze genetic mosaics. In these mosaics, tissues contain various groups of cells with different known genotypes, permitting study of the differences that these genotypes generate in cell behavior.

For bacteria that cheat, food is at the forefront (10 Aug 2017) Microbes that produce important secretions for use in a community suffer a blow to their own fitness for supplying the non-producing 'cheater' bacteria -- but only when production requires the same nutrients that would otherwise go into growth and biomass.

Plants love microbes, and so do farmers (10 Aug 2017) The Australian Sunshine Coast's plant diversity has helped researchers confirm that nurture has the upper hand -- at least when it comes to plant microbes. A study of microbial communities necessary for plant development could improve crop and plant yields.

First winged mammals from the Jurassic period discovered (09 Aug 2017)
Two 160-million-year-old mammal fossils discovered in China show that the forerunners of mammals in the Jurassic Period evolved to glide and live in trees. With long limbs, long hand and foot fingers, and wing-like membranes for tree-to-tree gliding, Maiopatagium furculiferum and Vilevolodon diplomylos are the oldest known gliders in the long histo [+]


Fruit fly mutation foretells 40 million years of evolution (09 Aug 2017) Small, seemingly insignificant mutations in fruit flies may actually hold clues as to how a species will evolve tens of millions of years in the future.

New 13-million-year-old infant skull sheds light on ape ancestry (09 Aug 2017) A new discovery in Kenya of a remarkably complete fossil ape skull reveals what the common ancestor of all living apes and humans may have looked like.

Eradicating exotic pests with 'infertility genes' may be possible (09 Aug 2017) It may be possible to eradicate populations of invasive pest animals through the inheritance of a negative gene – a technique known as gene drive – suggest researchers.

Even bacteria have baggage, and understanding that is key to fighting superbugs (08 Aug 2017) New research points to treatment strategies for multi-drug antibiotic resistance using currently available drugs. The study demonstrates how different adaptation histories of bacterial pathogens to antibiotics leads to distinct evolutionary dynamics of multi-drug resistance.

MRSA survival chances predicted by DNA sequencing the superbug (07 Aug 2017) Sequencing the DNA of the MRSA superbug can accurately identify patients most at risk of death and could help medics develop new treatments as we move towards personalised medicine, say scientists.

A new snake in Europe: The Barred Grass Snake is described as a separate species (07 Aug 2017)
Scientists identified a new species of snake in Europe. Based on more than 1,600 snakes, the researchers were able to show that the “Barred Grass Snake,” whose range includes Western Germany, France, Great Britain, Switzerland and Italy constitutes a distinct species. In their study the team examined two contact zones – in the Rhine region and in e [+]


Unknown virus discovered in 'throwaway' DNA (04 Aug 2017)
A chance discovery has opened up a new method of finding unknown viruses. Researchers have revealed that Next-Generation Sequencing and its associated online DNA databases could be used in the field of viral discovery. They have developed algorithms that detect DNA from viruses that happen to be in fish blood or tissue samples, and could be used to [+]


Lizard blizzard survivors tell story of natural selection (03 Aug 2017)
An unusually cold winter in the US in 2014 took a toll on the green anole lizard, a tree-dwelling creature common to the southeastern United States. A new study offers a rare view of natural selection in this species, showing how the lizard survivors at the southernmost part of their range in Texas came to be more like their cold-adapted counterpar [+]


Animal coloration research: On the threshold of a new era (03 Aug 2017) In the last 20 years, the field of animal coloration research has experienced explosive growth thanks to numerous technological advances, and it now stands on the threshold of a new era.

Revising a mammal branch on tree of life (02 Aug 2017) One small mammal is experiencing a triumphant return to its long-ago spot on the tree of life. Scientists have elevated a subspecies of giant sengi, or elephant-shrew, to full species status aided by genetic information gathered from the California Academy of Sciences' vast mammalogy collection.

What flowers looked like 100 million years ago (02 Aug 2017)
Flowering plants with at least 300,000 species are by far the most diverse group of plants on Earth. They include almost all the species used by people for food, medicine, and many other purposes. However, flowering plants arose only about 140 million years ago, quite late in the evolution of plants, toward the end of the age of the dinosaurs, but [+]


Baby fish exercising, a surprising source of adaptive variation in fish jaws (01 Aug 2017) A frustration of evolutionary biologists is that genetics can account for only a small percent of variation in physical traits. Now researchers have found new results on how another factor, a behavior in early cichlid fish larvae's developmental environment, influences later variation in their craniofacial bones.

Safely releasing genetically modified genes into the wild (01 Aug 2017)
So, you've genetically engineered a malaria-resistant mosquito. Now what? How many mosquitoes would you need to replace the disease-carrying wild type? What is the most effective distribution pattern? How could you stop a premature release of the engineered mosquitoes? Applied mathematicians and physicists used mathematical modeling to guide the de [+]


Genome sequencing shows spiders, scorpions share ancestor (01 Aug 2017) Researchers have discovered a whole genome duplication during the evolution of spiders and scorpions.