Let me share with you a difference between K-selected species vs. r-selected species.
| Aspect | K-selected Species | r-selected Species |
| Reproductive strategy | · Low reproductive rate · High parental investment | · High reproductive rate · Low parental investment |
| Population size | Small populations | Large populations |
| Life expectancy | Longer life expectancy | Shorter life expectancy |
| Maturity age | Delayed maturity | Early maturity |
| Number of offspring | Few offspring per reproductive event | Many offspring per reproductive event |
| Parental care | Extensive parental care and protection of offspring | Limited or no parental care |
| Survival rate | High survival rate of offspring | Low survival rate of offspring |
| Habitat | Typically in stable environments | Often in unpredictable or changing environments |
| Competition | Better competitors for resources | Often poor competitors for resources |
| Adaptability to environmental changes | Less adaptable to rapid environmental changes | More adaptable to rapid environmental changes |
| Examples | · Elephants · Whales · Humans | · Insects · Rodents · Weeds |