Rapid Population Growth Is Still A Problem
NEW YORK -- Current trends in reproductive behavior differ sharply between regionsand should not be confused, says Population Council vice president JohnBongaarts. "In the already crowded developing world, despite plummetingfertility rates, both the number of births and population size will keepgrowi......stes attributed the change in killer whale feeding behavior to a collapse inpopulations of the killer whales' usual prey, seals and sea lions. Reducedabundance of certain fish species in the open ocean, possibly due tooverfishing, has caused the populations of Steller sea lions and harbor seals inAlaska to de...UCSF Finding Offers Insight Into Way Genes Regulate Aging And Life Span
...aces, prompting secondsignals that then effect the behavior of other cells. "It may be that the signaling cascade prompted by daf-2 in certain cells occursin a similar way in the insulin/IGF family of receptors in mammals in responseto caloric restriction," said Kenyon. If this is the case, she said, it may ...Monkeys Have Numerical Abilities, Two Columbia Psychologists Report
...ples of animal intelligence were simplyconditioned behavior that didn't require cognitive explanations. Prof....processes are needed toexplain the kind of complex behavior they are studying. They hope to show thathuman intelligence, like other human attributes, can be tr...World's Oldest Known Fossil Reptile Nests Discovered In Arizona's Petrified Forest
... "The evidence now indicates this type of nesting behavior in reptileshas been continuous from at least the Triassic Period to the present," saidHasiotis, who received his doctorate from CU-Boulder in 1997. Hasiotis, whospecializes in trace fossils, has previously been credited with discovering theworld's o...Oxygen-Carrying Myoglobin Not Necessary For Survival
...ygen.Neither group showed any differences in their behavior or their ability to handle the different conditions. The only alteration researchers found in the rodents lacking myoglobinwas that the heart and endurance muscles were nonpigmented or almost whiterather than a rich pink because most of the ...New Hypothesis Proposed For Cause Of Chronic Fatigue Syndrome
...have yet to show a pattern of abnormal cytokine behavior that would substantiate their theory but he has an explanation for that. “We haven’t discovered all the cytokines involved in immunity. We may not have found the right one, yet,” he said, adding that new cytokines are st......onsiderable attention, its preciserole in language behavior remains controversial," said Corina. "One controversyis whether Broca's areas is specialized just for speech or language in general.We have now been able to identify that Broca's area is involved in languageproduction, not just speech production but ...Vulnerability To Compulsive Gambling Is Partly Inherited
...Affairs. "By comparing the sharing of a particular behavior in identical twinpairs with that in fraternal twin...symptoms, we found that about half of the gambling behavior was geneticallymediated." For three other behaviors - attempts to win back losses at the same place...Memory Loss In Old Age No Longer Linked To Dying Brain Cells
...ol of Medicine and Boston University, studying the behavior of ratsafter methodically removing specific neurons in the brain and usingneuorphysiological, anatomical, and molecular-biological methods to assess theeffects on memory tasks and neural communication. Beliefs about neuro-degeneration as a ba...New Phylloxera Strain Poses Threat Primarily To Grape Nurseries
...le to adapt and how they'vemanaged to change their behavior quickly over five to 10 generations. On the East Coast and in Europe the foliar phylloxera is commonly found andcreates limited problems for vinifera grafted on rootstock varieties. "Itprobably has very limited viticultural importance in Cal...Genetically Engineered Mice Exhibit Anxiety, Offering Insight Into Role Of Serotonin In Brain
...ceptor in a group of mice, and then compared their behavior to that of theirnormal siblings. The results, sai...others, the researchers also sought to compare the behavior of the mutant micewith that of mice treated with antidepressant drugs. While they stress thatfurther...Staring And Squirming Help Babies Explore
...gins to subside. "We think this may be an adaptive behavior that helps an infant to unlock herattention so she...bertson says, alsoshows the role of variability in behavior and development: "The fact that thesecycles are irregular may be ensuring a diversity of behaviors ...Bird Dads Suffer Infidelity But Bring Up Baby
...ively." But why does the male jacana tolerate this behavior by his mate? Trying tounderstand, the biologists...se female jacanas don't haveparental care in their behavior repertoire. Male jacanas seem to understandthat if they abandon mixed-parentage chicks, all the you...Immortalizing Enzyme Does Not Make Human Cells Cancerous
...ility to immortalize human cells and retain normal behavior holdspromise in several areas including biopharmaceutical research andtransplantation medicine. The scientists believe this new technology has thepotential to produce unlimited quantities of normal human cells of virtually anytissue type. Permanent, ...Researchers Probe New Depths In Plant Communications
...ture of CmPP16 is that its geneticsequence and its behavior are very much like those of amovement protein used by viruses. "Plant viruses appear to have acquired the ability to useplant communication pathways to infect an entire plant,"Lucas says. "The parallels between viral movement proteinsand CmPP16 provi...Wetting Of Structured Or Imprinted Surfaces - Zooming Down Onto The Nanoscale
...ler length scales. Will we observe the same typeof behavior as on the macroscopic scale? This question poses a general challengeto the science of colloids and interfaces. It is also of technologicalimportance since our devices become smaller and smaller and their manufacturetypically involves the processing o...Flexible Membranes - Moving Through The Twilight Zone Between The Nano- And The Microworld
...ferenttheoretical approaches. On the one hand, the behavior of membranes on themicrometer scale is well understood in terms of smooth surfaces as described bydifferential geometry. In this way, one can explain the many different shapesand topologies as observed in the optical microscope. On the other hand, ou......y, describes the complex social systems and mating behavior of theacorn woodpecker. He has been conducting this research at the Hastings Reservefor nearly a quarter-century and will attest that long-term studies like thesedepend upon protected field sites such as those offered by the NRS. Mary Power, UC Ber...Wolf Prize In Medicine Awarded To Kandel, Columbia's Pioneer Of Memory Research
... merged withthose of biology to endow the study of behavior and learning with renewed vigorand explanatory pow...ks in mammals, Professor Kandel has begun to study behavior ingenetically modified mice. The work has demonstrated that long-term changes inthe synapses of the...