Social hierarchy in relation to adrenocortical activity in Xiphophorus helleri Heckel

Autor:	C. E. Currie, D. B. C. Scott
Rok vydání:	1980
Předmět:	biology Significant difference Social hierarchy Fish Zoology Xiphophorus Anatomy Aquatic Science biology.organism_classification Ecology Evolution Behavior and Systematics
Zdroj:	Journal of Fish Biology. 16:265-277
ISSN:	1095-8649 0022-1112
DOI:	10.1111/j.1095-8649.1980.tb03704.x
Popis:	A study of the epideictic behaviour patterns of male Xiphophorus helleri Heckel was made, and the social rank of individual fish in 12 groups of three was assessed over a ten-day period. Straight-line hierarchies were established in most groups. An anatomical study was made to locate the adrenocortical tissue, and the adrenocortical activity of each fish was assessed by measuring mean nuclear diameter of 25 adrenocortical cells. Although results were somewhat variable, the highest-ranking fish in 7 out of 12 groups showed the least adrenocortical activity. The remaining two fish showed no significant difference from each other in adrenocortical activity, though their rank was in most cases clearly distinguishable on behavioural grounds.
Databáze:	OpenAIRE
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