Despite protection urban hawks still face an array of threats
Life can be hard for a raptor. If you're a teenager from the city, it's even harder. That's according to a new study published in the Journal of Raptor.
Life can be hard for a raptor. If you're a teenager from the city, it's even harder. That's according to a new study published in the Journal of Raptor.
Plants & Animals
Mar 18, 2024
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15
In late 2023 the United States government released its Fifth National Climate Assessment (NCA). The NCA is a semi-regular summation of the impacts of climate change upon the U.S. and the fifth assessment was notable for being ...
Social Sciences
Mar 11, 2024
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1
The frequency and scale of mass mortality events—events where large numbers of organisms die in short periods of time—among farmed salmon have increased since 2012, according to a study published in Scientific Reports.
Plants & Animals
Mar 7, 2024
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22
The highly pathogenic avian influenza virus H5N1 has adapted to spread between birds and marine mammals, posing an immediate threat to wildlife conservation, according to a study from the University of California, Davis, ...
Evolution
Feb 28, 2024
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121
Newcastle University researchers have developed a new tool to predict cold-blooded animals' responses to environmental change.
Ecology
Feb 7, 2024
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6
Have you ever looked down at your breakfast, lunch or dinner and considered where the ingredients traveled from to reach your plate?
Analytical Chemistry
Feb 5, 2024
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1
An international study led by scientists at the Yale School of Public Health warns that ozone-related deaths will rise significantly in many parts of the world over the next two decades unless current climate and air quality ...
Earth Sciences
Jan 25, 2024
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6
Over the last century, die-offs of animal populations, known as mass mortality events (MMEs), have increased in frequency and magnitude. The scale of these events can be staggering: billions of dead fish, hundreds of thousands ...
Ecology
Jan 23, 2024
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15
Sharks have persisted as powerful ocean predators for more than 400 million years. They survived five mass extinctions, diversifying into an amazing variety of forms and lifestyles. But this ancient lineage is now among the ...
Plants & Animals
Jan 11, 2024
1
7
Frequent visits to oil palm plantations are leading to a sharp increase in mortality rates among infant southern pig-tailed macaques (Macaca nemestrina) in the wild, according to a new study published in Current Biology. ...
Plants & Animals
Jan 8, 2024
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Mortality rate is a measure of the number of deaths (in general, or due to a specific cause) in some population, scaled to the size of that population, per unit time. Mortality rate is typically expressed in units of deaths per 1000 individuals per year; thus, a mortality rate of 9.5 in a population of 100,000 would mean 950 deaths per year in that entire population. It is distinct from morbidity rate, which refers to the number of individuals in poor health during a given time period (the prevalence rate) or the number who currently have that disease (the incidence rate), scaled to the size of the population.
One distinguishes:
In regard to the success or failure of medical treatment or procedures, one would also distinguish:
Note that the crude death rate as defined above and applied to a whole population can give a misleading impression. The crude death rate depends on the age (and gender) specific mortality rates and the age (and gender) distribution of the population. The number of deaths per 1000 people can be higher for developed nations than in less-developed countries, despite life expectancy being higher in developed countries due to standards of health being better. This happens because developed countries typically have a completely different population age distribution, with a much higher proportion of older people, due to both lower recent birth rates and lower mortality rates. A more complete picture of mortality is given by a life table which shows the mortality rate separately for each age. A life table is necessary to give a good estimate of life expectancy.
This text uses material from Wikipedia, licensed under CC BY-SA