How do begging signals influence parental investment?

How do begging signals influence parental investment?

• A. Begging signals reduce parental provisioning.
• B. Begging signals elicit parental provisioning; honesty of signals can be maintained by costs to the offspring or benefits to parental fitness.
• C. Begging signals have no effect on parental investment.
• D. Begging signals are always honest.

Answer: (B)

Begging signals act as a communication from offspring to parents, letting the parents gauge how much they should invest in feeding. When begging is strong, provisioning tends to increase because the signal suggests higher need. The honesty of these signals is explained by two related ideas: either the cost of begging or producing the signal is high for the offspring, so only genuinely hungry or needy individuals can sustain intense begging, keeping the signal reliable; or feeding the current brood provides tangible fitness benefits to the parents, so there’s a payoff to responding to honest signals. In short, begging elicits parental investment, and its reliability is maintained by costs to the offspring or by benefits to parental fitness.

Begging signals act as a communication from offspring to parents, letting the parents gauge how much they should invest in feeding. When begging is strong, provisioning tends to increase because the signal suggests higher need. The honesty of these signals is explained by two related ideas: either the cost of begging or producing the signal is high for the offspring, so only genuinely hungry or needy individuals can sustain intense begging, keeping the signal reliable; or feeding the current brood provides tangible fitness benefits to the parents, so there’s a payoff to responding to honest signals. In short, begging elicits parental investment, and its reliability is maintained by costs to the offspring or by benefits to parental fitness.