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A Review and a Model of Decorating Behavior in Spider Crabs (Decapoda, Brachyura, Majidae)

Mary K. Wicksten
Crustaceana
Vol. 64, No. 3, Proceedings of the First European Crustacean Conference, 1992 / Actes de la Première Conférence Européenne sur les Crustacés, 1992 (May, 1993), pp. 314-325
Published by: Brill
Stable URL: http://www.jstor.org/stable/20104855
Page Count: 12
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A Review and a Model of Decorating Behavior in Spider Crabs (Decapoda, Brachyura, Majidae)
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Abstract

Spider crabs (family Majidae) often decorate themselves: that is, they put pieces of marine organisms among the hooked setae of the exoskeleton. This behavior can be absent in large crabs or those that live at great depths, on sand or in narrow crevices. Although some species put edible materials on their bodies and later remove and eat them, the majority of the spider crabs decorate themselves to camouflage themselves against predators. A model of the level of decoration is presented, from none at all to complete coverage of the dorsal surface. Important factors that affect the level are the evolutionary state, habitat, size, feeding and particularly the predators of the species of spider crab. /// Cangrejos arañas (familia Majidae) frecuentemente se decoran: es decir, ponen piezas de organísmos marinos entre las setas curvadas del exoesqueleto. Este comportamiento puede ser ausente en cangrejos grandes o en aquellos que viven a gran profundidad, en arena o en hendiduras estrechas. Aunque algunas especies ponen materiales comestibles en sus cuerpos y, mas tarde, los remueven y los comen, la mayoría de los cangrejos arañas se decoran para esconderse contra predadores. Se presenta un modelo del grado de decoración, de ningún hasta el recubrimiento completo del superficie dorsal. Factores importantes que afectan el grado son el estado de evolucíon, hábito, tamaño, comida y particularmente los predadores de la especie de cangrejo araña.

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