Conservation biologists are setting their minimum population size targets too low to prevent extinction, according to a new study.
... 20,000 animals. The population of humpback whales in the North Pacific, at least half of whom ... determined whale migratory patterns and estimated population sizes by using a library of 18,000 photographs ...
... ask us how many orangutans really remain, and how that compares to historical population sizes," Beck said. "Those responsible for environmental stewardship cannot hide indecisively behind purported ...
... of observers to detect birds on population surveys, and can result in underestimates of true population size.
In order to explore these questions, Simons and others worked to develop "Bird Radio:" a ...
... linking the effects of climate on food resources to changes in breeding success and population size.
"This is the most worrying development that I have found in my scientific career to date. However, ...
... range, divided into eastern and western sub-populations, show a low level of genetic variation, data which, in conjunction with the small population size, places the bears in a critical situation.
... depended on local population density or the degree of migration between them. Using genetic estimates of population size in the past, the team went on to show that density was similar in sub-Saharan ...
... PLoS ONE on July 29. Reconstructions of the timing and magnitude of changes in human population size are important for understanding the evolution of our species. There has been a longstanding ...
... animals.
It is likely that this greater emphasis on small, harder to obtain, sources of protein reflects growing human populations in Europe and the pressure they placed on their environments. <
... are an excellent indicator of intense internal warfare, which has direct impacts on population size.
Debates concerning the population of ancient Rome during the first century B.C. are important ...
... in 1966. Current estimates for humpback whale numbers are widely debated. While they are recovering, total population sizes may only perhaps be a small percent of the original global population.
... species, as is required by national and international law. For population size estimates, the classical method of MRR (Mark ... size of wild cats failed several years ago, because insufficient cat hair ...
... employers in the CDC study came from both the private and public sectors and ranged in workforce population size from 7,500 to more than 115,000 employees.
In its evaluation, the research team found ...
... between species after initial isolation. However, we show that this explanation is not necessary. If the effective population size of the current mainland species (Drosophila simulans) is just a ...
... Winfree will present a study that combines data from over 50 published studies of bee population sizes and diversity. She found that in areas of extreme fragmentation due to human development, animal ...
