Summary
Hatching in the tendipedid, Calopsectra neoflavellus involves first a slow uptake of water by the embryo during development, whereby it increases in size and comes to fill entirely the space within the chorion. After completion of embryonic development, the prolarva increases still more in size by swallowing and absorbing water. Internal pressure thus generated results in the bursting of the chorion. The larva then frees itself by active movements.
In the branchiuran, Argulus megalops, hatching is similar to that previously described for Copepoda, in that an inner egg membrane swells osmotically and splits the outer chorion. Subsequent bursting of the inner membrane throws the larva nearly out of the egg, but final emergence is by active struggle of the larva.
Zusammenfassung
Das Ausschlüpfen von Calopsectra neoflavellus enthält erstens eine langsame Wasseraufnahme durch den Embryo, wodurch der Embryo wächst und das Wasser den ganzen Raum zwischen Embryo und Chorion füllt. Nach Vollendung der Entwicklung quillt der Embryo noch mehr auf durch den Schluckakt und Aufnahme des Wassers. Dann zerreisst das Chorion durch den intraovularen Druck. Endlich befreit sich die Larve durch Sträuben.
In Argulus megalops (Branchiura) gleicht das Ausschlüpfen dem vorher dargestellten für den Copepoden. Eine innere Membran schwillt osmotisch und zerreisst; das Chorion dann zerreist auch die innere Membran selbst and wirft die Larve nahezu aus dem Ei hinaus, aber die schliessiiche Befreiung geschieht durch Sträuben.
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References
Branch, Hazel E. - 1923 - The life-history of Chironomus cristatus FABR. with descriptions of the species. J. New York entom. Soc., 31:15–30 + 3 pls.
Clark, Frederick N. - 1902 - Argulus foliaceus. A contribution to the life history. Proc. S. London Entom. and Nat. Hist. Soc., 1902:12–21 + 2 pls.
Davis, Charles C. - 1959 - Osmotic hatching in the eggs of some fresh-water copepods. Biol. Bull., 116(1):15–29.
Davis, Charles C. 1961a - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). II. Hatching in Ranatra fusca P. Beauvois (Hemiptera, Nepidae). Trans. Amer. micr. Soc., 80(2):227–234.
Davis, Charles C. 1961b - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). III. Hatching in Dineutus assimilis Aubé (Coleoptera, Gyrinidae). Int. Rev. ges. Hydrobiol., 46(3):429–433.
Davis, Charles C. 1963a - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). IV Hatching in Libellula sp. (Odonata, Anisoptera). V. Hatching in Eylias extendens Müller (Acarina, Hydracarina). Trans. Amer. micr. Soc., 82(2):213–219.
Davis, Charles C. 19863b - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). VI. The three-fold hatching of Limnesia hexagona (Atari, Hydrachnellae, Limnesiidae). Int. Rev. ges. Hydrobiol., 48(2): 351–355
Davis, Charles C. 1964a - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). VII. Observations on hatching in Notonecta melaena Kirkaldy (Hemiptera, Notonectidae) and on Ranatra absona D. and DeC. (Hemiptera, Nepidae). VIII. The hatching process of Amnicola (?) hydrobioides (Ancey) (Prosobranchia, Hydrobiidae). Hydrobiologia, 23 (1–2):253–266.
— 1964b - Idem. IX. Hatching within the brood pouch of the ovovipiparous isopod, Cirolana sp. (Isopoda, Cirolanidae). X. Hatching in the fresh-water shrimp, Potimirim glabra (Kingsley) (Macroura, Atyidae). Pacific Sci., 18: (in press).
Davis, Charles C. 1964c - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). XIII. Events of eclosion in the American lobster, Homarus americanus Milne-Edwards (Astacura, Homaridae). Amer. Midl. Nat., 72(1):203–210.
Davis, Charles C. 1964d - A study of the hatching process in aquatic invertebrates. I. The hatching process in Amnicola limosa (Gastropoda, Prosobranchia). XV. Donacia palmata Oliv. (Coleoptera, Chrysomelidae) and Paraponyx maculata (Clemens) (Lepidoptera, Pyralidae, Nym-phulinae). Int. Rev. ges. Hydrobiol., 49(4): 645–651.
— 1965a - Idem. XI. Sumario de investigaciones en El Salvador, año 1962. Commun. Inst. Tropical Invest. Cient. (in press).
— 1965b - Idem. XII. The eclosion process in Trichocorixa naias (Kirkaldy) (Heteroptera, Corixidae). Trans. Amer. micr. Soc. (in press).
Eichhorn, Ruth. - 1957 - Zur Populationsdynamik der calanoiden Copepoden in Titisee und Feldsee. Arch. Hydrobiol., Suppl., 24:186–246.
Elster, Hans-Joachim. - 1936 - Einige biologische Beobachtungen an Heterocope borealis Fischer (=H. weismanni Imhof). Int. Rev. ges. Hydrobiol. 35(5–6):357–433.
Mceehean, O. Lloyd. - 1940 - A review of the parasitic Crustacea of the genus Argulus in the collections of the United States National Museum. Proc. U.S. Nat. Mus., 88(3087):459–522.
Munsterhjelm, Gust. - 1920 - Om chironomidernas äggläggaing och äg-grupper. Acta Soc. Fauna Flora Fennica. 47(2):i-viii, 1–174 + 5 pls.
Pause, Johannes. - 1918 - Beiträge zur Biologie und Physiologie der Larve von Chironomus gregarius. Zool. Jb. Abt. allg. Zool., 36:339–452 + 2 pls.
Thienemann, August. - 1954 - Chironomus. Leben, Verbreitung und wirtschaftliche Bedeutung der Chironomiden. Die Binnengewässer, 22:i-xvi, 1–834, + 31 pls. Schweitzerbart, Stuttgart.
Thienemann, August & Karl, Strenzke. - 1940 - Terrestrische Chironomiden. III–IV. Zwei parthenogenetische Formen. Zool. Anz., 132:24–40.
Wilson, Charles B. - 1902 - North American parasitic copepods of the family Argulidae, with a bibliography of the group and a systematic review of all known species. Proc. U.S. Nat. Mus., 25:635–742 + 20 pls.
Wilson, Charles B. 1907 - Additional notes on the development of the Argulidae, with description of anew species. Proc. U.S. Nat. Mus., 32:411–424 + 4 pls.
Wilson, Charles B. 1932 - The copepods of the Woods Hole region Massachusetts. Bull. U.S. Nat. Mus., 158:i-xix, 1–635, + 41 pls.
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Supported by National Science Foundation grant GB-219, entitled „A study of hatching and of the ecology of egg masses of aquatic invertebrates.”
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Davis, C.C. A study of the hatching process in aquatic invertebrates. XVI. Events of eclosion in Calopsectra neoflavellus Malloch (Diptera, Tendipedidae). XVII. Hatching in Argulus megalops Smith (Crustacea, Branchiura). Hydrobiologia 27, 196–207 (1966). https://doi.org/10.1007/BF00161496
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DOI: https://doi.org/10.1007/BF00161496