That isn't logically surprising. Starvation will kill result in death where lack of mating will not. I find this sort of decision making is limited to complex

That isn't logically surprising. Starvation will kill result in death where lack of mating will not. I find this sort of decision making is limited to complex brains as the article suggests. I am currently growing two pumpkin vines in my yard. They are massive each growing as far as 50 feet in dozens of forked directions. I have noticed the plants make decisions on when to allow fruit. This decision occurs a different times as I have seen fruit abandoned before it is fertilized. I have also seen fruit dropped from the plant after becoming nearly grapefruit sized in order to prioritize resources elsewhere. This fruit dropping is a decision made by the plant. It is not the result of a biological attack or insufficient resources. It is about whether an investment in a fruit should be deliberately abandoned or continue at great expense. For example one of the larger dropped fruits is immediately adjacent to a fruit that is now the size of a basketball. The plant had resources to grow both fruits to maturity, but chose to abandon one in favor of the other, perhaps some form of risk reduction. This is a complex form of planning calculus achieved by an organism with no brain at all.