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Chemical composition and caloric content of egg and zoea of the hermit crabeupagurus bernhardus

Chemische Zusammensetzung und Kaloriengehalt von Ei und Zoea des EinsiedlerkrebsesEupagurus bernhardus

Kurzfassung

Im Laufe der vollständigen Eientwicklung findet eine Zunahme von Wasser um 31,5%, Asche um 5,7%, Eiweiß um 8,8% und Nicht-Eiweiß-Stickstoff um 0,2% statt. In der gleichen Zeit sinkt der Fettgehalt von 29,5% auf 14,8% und der Energiegehalt von 6292 auf 5282 cal/g organischer Substanz. Der Kumulativ-Nutzeffekt der Entwicklung von einem Ei zur Zoea-Larve beträgt 70,0%, 55,3%, 79,4% bzw. 35,0% bezogen auf Trockengewicht, Kaloriengehalt, Eiweiß bzw. Fett. Von den 0,0722 cal, die sich auf den Stoffwechsel der gesamten Entwicklung eines Eies beziehen, werden nur 28,4% aus Eiweiß gewonnen; 66,6% werden durch Oxydation von Fett beigetragen.

Summary

1. Chemical composition and caloric content of egg and zoea of the hermit crabEupagurus bernhardus have been determined and the cumulative efficiencies of yolk utilization calculated.

2. The cumulative efficiencies of yolk utilization for different constituents were 70.0%, 55.3%, 79.4% or 35.0% for dry weight, caloric content, protein or fat.

3. Since the efficiencies with which the different constituents of yolk utilized vary, the chemical composition of the developing eggs undergoes considerable changes. While fat and caloric content showed remarkable decreases, water, ash and protein contents of the eggs increased.

4. Of 0.0722 cal expended on metabolic processes of the embryo, only 28.4% was drawn from the oxidation of protein, while fat contributed as much as 66.6%.

5. Considerable quantities of inorganic salts (0.77µg/egg) are absorbed from the sea-water by the developing egg.

Literature cited

  • Baldwin, E., 1964. An introduction to comparative biochemistry. 4th ed. Univ. Press, Cambridge, 179 pp.

    Google Scholar 

  • Barnes, H. &Barnes, M., 1965. Egg size, nauplius size and their variation with local, geographical and specific factors in some common cirripedes.J. Anim. Ecol. 34, 391–402.

    Article  Google Scholar 

  • Crisp, D. J. P., 1959. Factors affecting the time of breeding ofBalanus balanoides.Oikos 10, 275–289.

    Article  Google Scholar 

  • Gray, J., 1928. The growth of fish. 2. The growth-rate of the embryo ofSalmo fario.J. exp. Biol. 6, 110–124.

    Google Scholar 

  • Kinne, O., 1960.Gammarus salinus — Einige Daten über den Umwelteinfluß auf Wachstum, Häutungsfolge, Herzfrequenz und Eientwicklungsdauer.Crustaceana 1, 208–217.

    Article  Google Scholar 

  • —— 1961. Growth, molting frequence, heart beat, number of eggs and incubation time inGammarus zaddachi exposed to different environment.Crustaceana 2, 26–36.

    Article  Google Scholar 

  • McLaren, I. A., 1966. Predicting development rate in copepod eggs.Biol. Bull. mar. biol. Lab., Woods Hole 131, 457–469.

    Article  Google Scholar 

  • Needham, J., 1950. Biochemistry and morphogenesis. Univ. Press, Cambridge, 785 pp.

    Google Scholar 

  • Nicholls, A. G., 1931. Studies onLigia oceanica. 1. Habitat and effect of change of environment on respiration. Observations on molting and breeding.J. mar. biol. Ass. U. K. 17, 655–673.

    Article  Google Scholar 

  • Pandian, T. J., 1967a. Changes in the chemical composition and caloric content of developing eggs of the shrimpCrangon crangon.Helgoländer wiss. Meeresunters. 16, 216–224.

    Article  Google Scholar 

  • -- 1967b. Changes in the chemical composition and caloric content of developing eggs ofLigia oceanica. (Unpubl.)

  • -- 1967c. Chemical composition and caloric content of developing eggs of the lobsterHomarus gammarus. (Unpubl.)

  • -- 1967d. Changes in the chemical composition and caloric content of developing eggs of the brine shrimpArtemia salina. (Unpubl.)

  • -- 1967e. Changes in the chemical composition and caloric content of developing eggs of the slipper limpetCrepidula fornicata. (Unpubl.)

  • Patel, B. &Crisp, D. J., 1960. Influence of temperature in the breeding and molting activities of some warm water species of operculate barnacles.J. mar. biol. Ass. U. K. 39, 667–680.

    Article  Google Scholar 

  • Pregl, F. &Roth, H., 1958. Quantitative organische Mikroanalyse. 7. Aufl. von H. Roth. Springer, Wien, 361 pp.

    Chapter  Google Scholar 

  • Stolfi, G., 1933. L'accrescimento embrionale delLoligo vulgaris. Atti Accad. naz. Lincei Rc. (Cl. Sci. fis. mat. nat.) 18 (6), 516 ff.

  • Taube, I. &Nauwerck, A., 1967. Zur Populationsdynamik vonCyclops scutifer Sars. 1. Die Temperaturabhängigkeit der Embryonalentwicklung vonCyclops scutifer Sars im Vergleich zuMesocyclops leuckarti (Claus).Rep. Inst. Freshwat. Res. Drottningholm 47, 76–86.

    Google Scholar 

  • Urbani, E., 1959. Protidi, glucidi e lipidi nello sviluppo diArtemia salina Leach.Acta Embryol. Morph. exp. 2, 171–194.

    CAS  Google Scholar 

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Pandian, T.J., Schumann, KH. Chemical composition and caloric content of egg and zoea of the hermit crabeupagurus bernhardus . Helgolander Wiss. Meeresunters 16, 225–230 (1967). https://doi.org/10.1007/BF01611706

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