A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Plasticity in filtering screens of Daphnia cucullata x galeata hybrids and parental species at two food concentrations
Tekijät: Repka S, Vesela S, Weber A, Schwenk K
Kustantaja: SPRINGER VERLAG
Julkaisuvuosi: 1999
Lehti:: Oecologia
Tietokannassa oleva lehden nimi: OECOLOGIA
Lehden akronyymi: OECOLOGIA
Vuosikerta: 120
Numero: 4
Aloitussivu: 485
Lopetussivu: 491
Sivujen määrä: 7
ISSN: 0029-8549
DOI: https://doi.org/10.1007/s004420050881
Tiivistelmä
The coexistence of Daphnia cucullata x galeata hybrids with the parental species D. galeata and D. cucullata was investigated by measuring areas and mesh sizes of filtering structures of these herbivorous zooplankton taxa cultivated at low and high food concentrations. The clearance rates and somatic growth rates were also determined. When reared at low food concentration, all taxa had larger filtering areas. Larger filtering areas also resulted in higher clearance rates. Differences between taxa in both filtering area and clearance rate were caused mainly by interspecific size differences. Hybrids had the largest absolute mesh sizes, and the parental species had smaller mesh sizes. Hybrids also showed heterosis in somatic growth rate at high food concentration. The observed taxon-specific differences in mesh size and somatic growth rate contribute to resource partitioning between the taxa and thus to their successful coexistence in lakes.
The coexistence of Daphnia cucullata x galeata hybrids with the parental species D. galeata and D. cucullata was investigated by measuring areas and mesh sizes of filtering structures of these herbivorous zooplankton taxa cultivated at low and high food concentrations. The clearance rates and somatic growth rates were also determined. When reared at low food concentration, all taxa had larger filtering areas. Larger filtering areas also resulted in higher clearance rates. Differences between taxa in both filtering area and clearance rate were caused mainly by interspecific size differences. Hybrids had the largest absolute mesh sizes, and the parental species had smaller mesh sizes. Hybrids also showed heterosis in somatic growth rate at high food concentration. The observed taxon-specific differences in mesh size and somatic growth rate contribute to resource partitioning between the taxa and thus to their successful coexistence in lakes.
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