r-selected species produce

r-selected species are species that exhibit a reproductive strategy that emphasises high growth rates, rapid development, and a relatively short lifespan. These species typically produce many offspring, but provide little parental care or investment in each offspring. The ‘r’ in r-selected species stands for rate of population growth. Some characteristics of r-selected species include:
 

•             Large number of offspring (high reproductive rate)
•             Small size of the offspring
•             Early reproductive age
•             Short lifespan
•             Little parental care

Examples of r-selected species include oysters and pelagic fishes.