A K-strategist is an organism that can compete for limited resources. Since these organisms can successfully get access to these resources, they are usually large (in body size) and have a long life expectancy. Additionally, K-strategists typically have a constant population size (the population size doesn’t rapidly change like r-strategists), they produce fewer offspring than most species (they also don’t reproduce as frequently as r-strategists), and these offspring require prolonged parental care (until they mature). Pictured is Trevor (a human). Humans are K-strategists along with elephants and whales since they posses the necessary K-selected traits.


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