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Angew Parasitol

Title:		[Aggregation behavior of Blattela germanica]
Author(s):		Sommer SH;
Address:
Journal Title:		Angew Parasitol
Year:		1975
Volume:		16
Issue:		3
Page Number:		135 - 141
DOI:
ISSN/ISBN:		0003-3162 (Print) 0003-3162 (Linking)
Abstract:		1. The adult males of the German cockroach Blattella germanica are less strongly aggregated in their resting period than the adult females; they seldom stay below the common hiding place. This tendency decreases in the course of a day.--2. The nymphs aggregate in the first days of their lives below the hiding places of the adults where they had left the oothecae. Later the nymphs seek hiding places that are better adapted to their body size. An olfactory stimulus (aggregation pheromone) which is going out from the adult induces the nymphs to go back again to the adults in the course of a day. This tendency decreases more when the nymphs become older. At the same time the number of nymphs which are absent from hiding places increases.--3. A positive chemotactic and a positive thigmotactic reaction are responsible for this behaviour of the cockroaches. A phototactic negative reaction is less important
Keywords:		"Activity Cycles Animals *Behavior, Animal Chemotaxis *Cockroaches/physiology Escape Reaction/physiology Female Larva Male Nymph Pheromones/physiology Social Behavior;"
Notes:		"MedlineSommer, S H ger English Abstract Germany 1975/09/01 Angew Parasitol. 1975 Sep; 16(3):135-41"