* Species Variation: There are many different species of both guppies and perch. Some species are hardier than others, so their survival rates would differ.
* Environmental Factors: Survival rates are heavily influenced by the environment. Factors like water quality, temperature, food availability, and the presence of predators all play a role.
* Age and Health: Young fish of both species are more vulnerable than adults. A healthy fish of either species will have a better survival rate than a sick or injured one.
* Aquarium vs. Wild: Survival rates in a controlled aquarium environment will be different than in the wild.
General Observations:
* Guppies: Guppies are known for being relatively hardy and adaptable. They can tolerate a wider range of water conditions than some other fish. They also reproduce quickly, which helps them maintain populations.
* Perch: Perch are generally considered tougher fish and can survive in colder water temperatures. They are also predators, giving them an advantage in the wild.
In Summary:
It's impossible to say definitively which fish has a higher survival rate without more information. The best way to determine this would be to compare survival rates for specific species in specific environments.