Empirical support for different types of positive mortality effects. A reply to Abrams

Abstract - They note that, for approximately half of their studies, the original study’s authors, or both claimed that the responses were hydra effects; this is because most used the correct definition. Schroder’s own empirical study in Table 2 exhibits a clear hydra effect in response to juvenile mortality. SVC ignore natural enemies as mortality factors.
However, decreased foraging in  to increased predation risk readily  hydra effects. It has  shown to common and to often increase the prey’s food intake rate because of greater resource abundance.