Abstract
Using transmission electron microscopy, egg content is studied in 10 parasitoid species, which either feed on host hemolymph or do not. As expected, hydropic eggs were found to contain little yolk which is only lipoid. In host-feeding species, the yolk contains a great number of typical protein bodies whereas in species that do not host-feed and which produce large eggs, the yolk contain very different bodies.
Résumé
La composition du vitellus des œufs de 10 espèces de parasitoïdes, dont les femelles s'alimentent ou non aux dépens de l'hémolymphe de leurs hôtes, a été étudiée en microscopie électronique à transmission. Les réserves vitellines des œufs de type hydropique ne sont constituées que de quelques globules lipidiques. Pour les œufs de type anhydropique, le vitellus contient de nombreuses plaquettes protéiques, typiques du vitellus des insectes, chez les espèces qui s'alimentent sur l'hôte, alors que les organites de réserves sont très différents chez les espèces qui ne présentent pas ce type d'alimentation.
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Le Ralec, A. Egg contents in relation to host-feeding in some parasitic hymenoptera. Entomophaga 40, 87–93 (1995). https://doi.org/10.1007/BF02372684
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DOI: https://doi.org/10.1007/BF02372684