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Morphotype Related Dominance Hierarchies in Males of Macrobrachium rosenbergii (Crustacea, Palaemonidae)

A. Barki, I. Karplus and M. Goren
Behaviour
Vol. 117, No. 3/4 (Jun., 1991), pp. 145-160
Published by: Brill
Stable URL: http://www.jstor.org/stable/4534936
Page Count: 16
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Morphotype Related Dominance Hierarchies in Males of Macrobrachium rosenbergii (Crustacea, Palaemonidae)
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Abstract

Agonistic interactions in groups of Macrobrachium rosenbergii males were investigated in the laboratory. Each of the ten replicate groups consisted of the three distinct male morphotypes of this species: two Blue Clawed (BC) males and two Orange Clawed (OC) males matched to size, and two, much smaller, Small Males (SM). Male prawns formed a linear dominance hierarchy in which BC males were dominant over OC males which, in turn, were dominant over SM. Stabilization of the hierarchy over a period of three days was evident from reduction in the number of agonistic interactions and their intensity with time. The three male morphotypes differed in the extent to which they were involved in agonistic interactions and the nature of these interactions. /// Agonistische Interaktionen in Gruppen von männlichen Macrobrachium rosenbergii wurden im Laboratorium untersucht. Zehn Duplikat-Gruppen enthielten die drei verschiedene männliche Morphotypen dieser Art: 2 Blue Claw (BC) und 2 Orange Claw (OC) Männchen von ähnlicher Grösse und 2 viel kleinere Small Males (SM). Diese Tiere formten eine lineäre Dominanzhierarchie, in welcher die BC Männchen die OC Männchen dominierten, während die letzteren über die SM dominierten. Die Stabilization dieser Hierarchie in Perioden von drei Tagen war klar durch die Verkleinerung der Anzahl von agonistischen Interaktionen und ihrer Intensität. Art und Weise dieser agonistischen Interaktionen und ihr Karakter waren verschieden in den drei Morphotypen.

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