Article,

Social isolation increases social display after priming in Betta splendens but decreases aggressive readiness

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Behavioural Processes, 28 (1 2): 13--31 (December 1992)

Abstract

Socially isolated adult, male Siamese fighting fish for 0-7 wks but avoided sensory deprivation, and then measured aggressive display as the fish responded to a series of novel models. Isolates displayed more strongly than nonisolates to the last model of the series, and display intensity became monotonically stronger with longer social isolation (SI). By contrast, display to the 1st model seen after isolation was weaker the longer the SI. A 2nd experiment compared responses of the fish after 3 wks during which controls displayed to a conspecific for 2 min every 2 days, while isolates saw a complex visual stimulus which did not release display. Again, isolates had depressed display readiness, but higher rates once they were primed. This result supports the hypothesis that SI has 2 effects on aggressive display, causing decreasing readiness to display, but leading to greater display rates once fish are "primed."

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