The length of time a spider can survive without food depends on its species, environmental conditions, and stored energy. As arthropods, spiders possess a certain capacity for stored energy and adaptation to starvation. Here are some details about spider hunger:

Species differences : Different species of spiders have varying degrees of tolerance to starvation. Some spider species are more resistant to starvation and can survive for weeks or even months without food, while others require more frequent feeding.
Storing energy : Spiders typically store a certain amount of energy in their bodies, including the ability to digest food and fat reserves. This energy reserve helps spiders survive for a period of time without food.
Environmental conditions : Temperature, humidity, and other environmental factors can also affect a spider's ability to withstand hunger. High temperatures or dry environments may accelerate the depletion of a spider's stored energy, reducing its ability to withstand hunger.
Physiological state : Whether a spider is in its reproductive, growth, or dormant period also affects its tolerance to hunger. Under specific physiological states, spiders may have different biological responses to hunger.
Generally speaking, spiders can survive for days to weeks without food because they typically possess highly adaptable survival mechanisms with abundant energy reserves. However, their specific tolerance for starvation depends on the spider species, individual condition, and environmental conditions. If you have a pet spider, it is recommended that you still provide it with food regularly to ensure its health and survival.