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Wie verhalt sich die Legerohre von Rhodeus amarus wahrend der Oviposition?



Wie verhalt sich die Legerohre von Rhodeus amarus wahrend der Oviposition?



Biol Zentralbl 60(3/4): 209-211



The ovipositor of the [female] bitterling is the urogenital papilla about 3-4 cm. long consisting of an inner and outer epithelium between which the connective tissue stroma is richly supplied with lymph spaces and blood vessels. When the stimulus to egg-laying manifests itself, the fish performs quick lashing movements with its ovipositor in the direction of the exhalant siphon of the mussel (Anodonta, Unio). An egg quickly moves down the tube, which becomes rigid above the egg, but remains soft below it. The ovipositor points downwards, penetrates deeply the opening of the mussel. As soon as the egg is extruded the ovipositor becomes completely relaxed.

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