Growth and fecundity of Daphnia after diapause and their impact on the development of a population

Laboratory and field investigations revealed that the life history traits of exephippial and parthenogenetic generations of Daphnia differ substantially. Daphniids hatching from resting eggs grow faster and their definitive body sizes are bigger than of hatchlings from subitaneous eggs. Size at maturity for exephippial animals is significantly larger. In spite of this, they mature a few days earlier than parthenogenetic females. In this study, the difference was 3–4 days for the laboratory experiments and 1–3 days for the field. Fecundity of the exephippial generation is markedly higher. Here, the clutch size for this generation was up to 3.5–4.0 times as large as for the parthenogenetic generation. Moreover, obtained results suggest that the relationship between clutch size and body length for both generations differ significantly.Estimates of the intrinsic rate of increase for field Daphnia populations demonstrated that life history traits of exephippial animals lead to a two or threefold higher rate of increase in the conditions of invertebrate predation pressure. Under moderate fish pressure, obtained r values for the daphniids hatching from resting eggs were larger than those from subitaneous. High growth rate of exephippial females is disadvantageous only under the conditions of severe pressure by fish. Obtained results suggest that hatchlings from diapausing eggs an acceleration of population increase by several times during the beginning of the development of a population with periodical re-establishment from resting eggs.

[1]  J. Orcutt,et al.  The synergistic effects of temperature and food concentration of life history parameters of Daphnia , 1984, Oecologia.

[2]  R. G. Stross,et al.  Diapause Induction in Daphnia Requires Two Stimuli , 1965, Science.

[3]  H. Clifford,et al.  Field and laboratory studies of Daphnia schodleri Sars from a winterkill lake of Alberta , 1974 .

[4]  G. Carvalho,et al.  Resting eggs of lake‐ Daphnia I. Distribution, abundance and hatching of eggs collected from various depths in lake sediments , 1989 .

[5]  Christian Moritz.  A note on the hatching and viability of Ceriodaphnia ephippia collected from lake sediment , 1987 .

[6]  L. Weider,et al.  Plasticity of Daphnia life histories in response to chemical cues from predators , 1993 .

[7]  Douglas S. Glazier,et al.  Effects of Food, Genotype, and Maternal Size and Age on Offspring Investment in Daphnia Magna , 1992 .

[8]  P. Hebert.  THE POPULATION BILOGY OF DAPHNIA (CRUSTACEA, DAPHNIDAE) , 1978 .

[9]  M. Vanni.  Effects of Food Availability and Fish Predation on a Zooplankton Community , 1987 .

[10]  R. G. Stross.  Light and Temperature Requirements for Diapause Development and Release in Daphnia , 1966 .

[11]  William W. Murdoch,et al.  Growth, Reproduction, and Mortality of Daphnia pulex Leydig: Life at Low Food , 1990 .

[12]  A. Herzig.  Resting eggs — a significant stage in the life cycle of crustaceans Leptodora kindti and Bythotrephes longimanus: With 5 figures and 5 tables in the text , 1985 .

[13]  Anders Hobæk,et al.  Sexual reproduction in Daphnia magna requires three stimuli , 1992 .

[14]  D. Brambilla.  Seasonal variation of egg size and number in a Daphnia pulex population , 1982, Hydrobiologia.

[15]  W. Lampert.  Phenotypic plasticity of the size at first reproduction in Daphnia: the importance of maternal size , 1993 .

[16]  Burt T. De Stasio.  The role of dormancy and emergence patterns in the dynamics of a freshwater zooplankton community , 1990 .

[17]  M. Lynch.  The Life History Consequences of Resource Depression in Daphnia Pulex , 1989 .

[18]  R. G. Stross.  PHOTOPERIOD CONTROL OF DIAPAUSE IN DAPHNIA. III. TWO-STIMULUS CONTROL OF LONG-DAY, SHORT-DAY INDUCTION , 1969 .

[19]  H. Stibor.  Predator induced life-history shifts in a freshwater cladoceran , 1992, Oecologia.

[20]  R. G. Stross.  PHOTOPERIOD CONTROL OF DIAPAUSE IN DAPHNIA. II. INDUCTION OF WINTER DIAPAUSE IN THE ARCTIC , 1969 .

[21]  P. Kankaala.  Resting eggs, seasonal dynamics, and production of Bosmina longispina maritima (P. E. Müller) (Cladocera) in the northern Baltic proper , 1983 .

[22]  W. Taylor,et al.  Comments on life-table parameters with reference to , 1987 .

[23]  R. G. Stross.  Photoperiod control of diapause in Daphnia. IV. Light and CO2-sensitive phases within the cycle of activation. , 1971, The Biological bulletin.

[24]  J. C. Hill,et al.  PHOTOPERIOD CONTROL OF WINTER DIAPAUSE IN THE FRESH-WATER CRUSTACEAN, DAPHNIA , 1968 .

[25]  M. Lynch.  The Life History Consequences of Resource Depression in Ceriodaphnia Quadrangula and Daphnia Ambigua , 1992 .

[26]  D. Ebert.  The effect of size at birth, maturation threshold and genetic differences on the life-history of Daphnia magna , 1991, Oecologia.

[27]  R. Hughes,et al.  The effect of food availability, female culture-density and photoperiod on ephippia production in Daphnia magna Straus (Crustacea: Cladocera) , 1983 .

[28]  R. G. Stross.  Photoperiodism and phased growth in Daphnia populations : Coactions in perspective. , 1987 .

[29]  P. Hebert,et al.  Methods for the activation of the resting eggs of Daphnia , 1987 .

[30]  H. Bottrell.  A review of some problems in zooplankton production studies , 1976 .

[31]  A. J. Tessier,et al.  Variation in offspring size in Daphnia and consequences for individual fitness , 1989 .

[32]  G. Carvalho,et al.  Resting eggs of lake‐Daphania II. In situ observations on the hatching of eggs and their contribution to population and community structure , 1989 .