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Post-Embryonic Development of Mesochra Aestuarii Gurney, 1921 (Copepoda, Harpacticoida)

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image of Crustaceana

Anhand von im Laboratorium gezüchteten Tieren wird die gesamte Larvalentwicklung von Mesochra aestuarii Gurney, 1921, beschrieben und abgebildet. Die Art durchläuft sechs Nauplius-und sechs Copepodit-Stadien (einschließlich des Adultus). Die Nauplius-Stadien können in sechs Größenklassen eingeteilt werden. Die geschlechtliche Differenzierung wird im fünften Copepodit-Stadium sichtbar. Zur Begattung kommt es gewöhnlich zwischen reifen Männchen und dem fünften weiblichen Copepodit-Stadium. Die Eisäckchen erscheinen 2-4 Tage nach der Begattung. Gewöhnlich werden 3-4 Eisäckchen nacheinander produziert und vom Weibchen 4-5 Tage lang getragen. Alle Nauplius-Stadien werden innerhalb von 9 Tagen durchlaufen, die Copepodit-Stadien 1-5 innerhalb von 8-10 Tagen (bei 17-24°C).

Affiliations: 1: Wilhelm-Pieck-Universität Rostock, Sektion Biologic, Freiligrathstr. 7/8, Rostock, 2500, Ger-man Democratic Republic


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