Heat stress from ocean warming harms octopus vision
While climate change has led to an increase in the abundance of octopuses, heat stress from projected ocean warming could impair their vision and impact the survivability of the species.
While climate change has led to an increase in the abundance of octopuses, heat stress from projected ocean warming could impair their vision and impact the survivability of the species.
Plants & Animals
Apr 5, 2024
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52
Climate change has an effect on forests and trees. They suffer from heat waves and periods of drought. But although we see tree mortality increase as a result, much is still unknown about the underlying mechanisms.
Plants & Animals
Apr 15, 2024
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46
A new study led by Prof. Lior David from the Faculty of Agriculture at the Hebrew University investigated the infectivity of disease-resistant and susceptible fish by examining their roles as shedders (infecting) and cohabitants ...
Biotechnology
Apr 17, 2024
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6
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