Aggressive Motivation in the Midas Cichlid: Evidence for Behavioral Efference

Aggressive Motivation in the Midas Cichlid: Evidence for Behavioral Efference AGGRESSIVE MOTIVATION IN THE MIDAS CICHLID: EVIDENCE FOR BEHAVIORAL EFFERENCE by ALAN B. BOND1) (University of Nebraska State Museum, W436 Nebraska Hall, Lincoln, NE 68588-0514, U.S.A.) (With 5 Figures) (Acc. 24-VI-1992) Summary Behavioral Efference is a hypothetical positive feedback from the performance of an aggressive display that augments the level of aggressive motivation. The hypothesis was proposed (BOND, 1989) to account for the occurrence of truthful communication during aggressive encounters, even in the face of a presumed selective pressure in favor of deceit (MAYNARD SMITH, 1984). Evidence of Behavioral Efference was sought in an experimental study of adult Midas cichlids Cichlasoma citrinellum, in which subjects responded aggressively to varying sizes of dummy fish. Before and after each aggression trial, the level of aggressive motivation was estimated from the intensity of the subject's attacks on conspecific juveniles. A weighted index of aggressiveness that objectively combined the frequencies of four aggressive action patterns was obtained using detrended correspondence analysis. Aggres- sion indices from aggression trials, as well as from intertrial intervals, furnished a basis for comparison of two causal models: behavioral efference, which assumes that post-stimulus motivation is substantially influenced by display performance, and Direct Stimulus Media- tion, which assumes Behaviour Brill

Aggressive Motivation in the Midas Cichlid: Evidence for Behavioral Efference

Behaviour , Volume 122 (3-4): 135 – Jan 1, 1992

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© 1992 Koninklijke Brill NV, Leiden, The Netherlands
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