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  Further trade-offs in Daphnia vertical migration strategies

Duncan, A., Guisande, C., & Lampert, W. (1993). Further trade-offs in Daphnia vertical migration strategies.

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 Urheber:
Duncan, A.1, Autor           
Guisande, C.1, Autor           
Lampert, W.1, Autor           
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Schlagwörter: -
 Zusammenfassung: During a vertical migration study of the Daphnia hyalina x galeata population in Schoehsee (Ploen), the elevation of length-carbon weight regressions and fecundity levels were used as measures of nutritive state in order to distinguish between migration and non-migration strategies and their trade-offs. About three-quarters of the population migrated down to a refuge at the top of the hypolimnion (15 m) during the day but spread themselves within the epilimnion (0-7 m) and metalimnion (9-13 m) at night. The trade-off for the migration strategy was reduced mortality but a poorer nutritive state. With the probability of low visual predation in the dark day-refuge, large numbers of larger-sized migrating individuals survived to exploit the food-rich surface layers at night but unfavorable food conditions during the long daytime hours resulted in lower carbon weights per unit length and reduced fecundities. Only 7% of the population adopted a non-migration strategy by staying at the surface (0-7 m) to exploit the richer food conditions, thus becoming heavier in carbon weight and more fecund. The negative side of the trade-off was an enhanced predation risk as shown by sparse populations of small individuals, primiparous females and very few large individuals.

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Sprache(n): eng - English
 Datum: 1993-04
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: -
 Art des Abschluß: -

Veranstaltung

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Titel: Diel vertical migration of zooplankton
Veranstaltungsort: Lelystad, The Netherlands
Start-/Enddatum: 1991-11-03 - 1991-11-08

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Quelle 1

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Titel: Diel vertical migration of zooplankton
Genre der Quelle: Heft
 Urheber:
Ringelberg, Joop, Herausgeber
Affiliations:
-
Ort, Verlag, Ausgabe: -
Seiten: IX, 222 S. Band / Heft: - Artikelnummer: - Start- / Endseite: 99 - 108 Identifikator: ISBN: 3-510-47040-0

Quelle 2

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Titel: Ergebnisse der Limnologie = Advances in Limnology
  Andere : Arch. Hydrobiol. Beih. Ergebn. Limnol.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Stuttgart : E. Schweizerbart'sche Verlagsbuchhandlung
Seiten: IX, 222 S. Band / Heft: Beiheft 39 Artikelnummer: - Start- / Endseite: - Identifikator: ISSN: 0071-1128
CoNE: https://pure.mpg.de/cone/journals/resource/1000000000017140