Costly breeding programs for endangered species pay off
...red populations went extinct, compared to just one extinction for the MAI lines. "Apparently, the stressful environment served to select only the most fit lines while the more benign environment allowed low-fitness lines to persist in captivity," said Meffert. Though the findings clearly support the case for ex...500 million years of errors: Brachiopod shells record shadow of arms race in ancient oceans
...chiopods were a common shellfish up until the mass extinction at the end of the Paleozoic that may have killed as much as 95 percent of all marine life. The rich Paleozoic fossil record of brachiopods yielded ancient shells that retained traces of predation, in particular, drillings by predators and parasites, ...Clear rules needed to govern deep sea bioprospecting: UNU
...th deep sea trawling, have already resulted in the extinction of species." Growing value of products from marine biotechnology The world's oceans host 32 of the 34 known phyla on Earth, the report says. Species diversity is known to be as high as 1,000 per square meter in the Indo-Pacific Ocean. Significant...Traditional models underestimate extinction rates
... to accurately predict the population dynamics and extinction risk of potentially endangered species has never b...s traditionally used to estimate the likelihood of extinction and shows that because they ignore a critical parameter in projecting risk, they underestimate extin...Small species back-up giant marsupial climate change extinction claim
...Downs fossil record. The results suggest that the extinction of Darling Downs megafauna was caused by a massive... megafauna deposits - laid down on the cusp of the extinction event. PhD researcher Gilbert Price, of QUT's School of Natural Resource Science who led the study,...Burnt coal from the age of dinosaurs sheds light on today's global warming
...her ways, too. They are often associated with mass extinction among many marine organisms and coincide with periods of intense global warming. Scientists have long debated what causes OAEs. The prevailing theory is that a release of massive amounts of methane into the ocean is the root cause. The methane, in ...K-State professor studies how landscape dynamics affect extinction risk for migratory songbirds
...rofessor on how chronic habitat loss increases the extinction risk of migratory songbirds may provide some insig...ped a landscape-based population model to evaluate extinction risk for several types of migratory songbirds that breed in the temperate forests and grasslands of ...Re-discovered ivory billed woodpecker still faces challenge to survival
...life refuges threatens to thrust this species into extinction for real this time," said Evan Hirsche, president of the NWRA. The ivory-billed woodpecker, the largest in the United States, was squeezed out of its southeastern old-bottomland habitat due to the fragmentation and harvesting of contiguous forests. ...A new study examines how shared pathogens affect host populations
...sion, a host can be rescued from pathogen-mediated extinction by the presence of a second host with which it shares a pathogen. Sharing a pathogen among one or more alternative species may actually be limiting the spread of the pathogen in any one particular host population. Thus, an epidemic on one species may...Migration study finds that sweeping management changes are needed to protect Atlantic bluefin tuna
...his majestic species to the doorstep of ecological extinction in the western Atlantic Ocean," says Barbara A. Block, the Charles and Elizabeth Prothro Professor in Marine Sciences at Stanford's Hopkins Marine Station and lead author of the Nature study. "Electronic tagging provides the best scientific informati...Royal Society study on adaptability of fish to warming oceans
...d interest since it affects both the likelihood of extinction of endangered species and our ability to control pest organisms. Dispersal movements have been claimed to be a universal cause of population synchrony. However, our study, which for the first time combines experimental data and mathematical modelling...Great White shark evolution debate involves WSU Lake Campus geology professor
...changes of life over time and how things like mass extinction affect the course of life," he said. Ciampaglio discussed his shark research findings at recent Geological Society of America meetings in Mississippi and Colorado. A scholarly journal article on the subject is pending. The geologist joined the Lake...Nitrogen fertilization of soil puts rare plant species at risk, nationwide study determines
...ead and dramatic, and that many species face local extinction risk. This work will help us identify species most at risk and point to management strategies to protect our ecosystems in face of these impacts." Suding's co-authors of the PNAS paper are Scott L. Collins, University of New Mexico, Albuquerque; Lau...Small clades at the periphery of passerine morphological space
...es must have unusually low rates of speciation and extinction compared to other songbirds. In an earlier analysi...ted that species in these small groups might avoid extinction by competitive exclusion because they are marginal both geographically and ecologically. In this new...Diversity, endemism, and age distributions in macroevolutionary sources and sinks
...ar oceans have had higher rates of immigration and extinction and much lower rates of origination than have the ... considering not just species origination but also extinction and dispersal when testing hypotheses about the geographic distributions of organisms....Low oxygen likely made 'Great Dying' worse, greatly delayed recovery
The biggest mass extinction in Earth history some 251 million years ago was preceded by elevated extinction rates before the main event and was followed by a delayed recovery that lasted for millions of years...PNAS highlights for the week of April 11 - 15
...s migrated out of Africa, they hunted elephants to extinction on five continents, archaeological evidence suggests. A million years ago, elephants lived in most of Africa, Europe, Asia, and the Americas. Today, wild elephants are found only in portions ofsub-Saharan Africa and South Asia. Whether these die-off...On the hunt for deadly frog disease
... the fungus was a major contributing factor in the extinction of at least another seven species world-wide," Dr Hyatt says. "In response to this major threat, AAHL has developed diagnostic assays and sampling techniques that enable the rapid detection of the fungus. "We've developed immunohistochemical, molecul...Unlocking genetic mysteries focus of UH symposium
...e with the drugs used to destroy them and species extinction and other issues of conservation biology. "To put this in perspective, genomes can be described as texts written in biochemical letters, called nucleotides, that are devoid of punctuation marks or any other annotations," said Dan Graur, the John an......rs are considered extremely rare, and in danger of extinction throughout their range. "Since we first radio-collared her in 1992, Olga lived largely outside of protected areas, in forests heavily used by hunters, and intensively grazed by cattle," said Dale Miquelle. "But for 13 years, she avoided contact wit...