What is the difference between a type 1 and type 3 survivorship curve?

A type 1 survivorship curve typically represents species that have high survival rates during early and middle life stages, with a significant drop in survival as they reach old age, such as humans and large mammals. In contrast, a type 3 survivorship curve illustrates species that have low survival rates at the early life stages, with many offspring dying young, but those that survive tend to live longer, such as many fish and amphibians. Essentially, type 1 species invest more in fewer offspring with higher parental care, while type 3 species produce many offspring with little to no parental care.