Summary
Life-history traits of 101 clones from two populations of Daphnia magna were measured under controlled environmental conditions in the laboratory. Some individuals had four juvenile instars, others had five. This depended on their length at birth and on the population they came from. Females in the group with five juvenile instars were smaller at birth but larger and older at maturity than those with four juvenile instars. Within groups of females with equal numbers of preadult instars (instar groups) age and size at maturity increased with size at birth. This relationship differed significantly among instar groups for both age and size at maturity. Significant differences in age and size at maturity between two populations became non-significant when size at birth was used as a covariable in AN-COVA. Within populations, size at birth depended on the clone and on the parity of the clutch. First-clutch offspring were considerably smaller than those from later clutches. The results suggest that variability in life-history traits is common within and between clones, but that most of this variation can be accounted for by size at birth and the number of pre-adult instars.
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References
Anderson BG (1932) The number of pre-adult instars, growth, relative growth, and variation in Daphnia magna. Biol Bull 63:81–98
Anderson BG, Jenkins JC (1942) A time study of events in the life span of Daphnia magna. Biol Bull 83:260–272
Bell G (1983) Measuring the cost of reproduction III. The correlation structure of the early life history of Daphnia pulex. Oecologia 60:378–383
Cole LC (1954) The population consequences of life history phenomena. Quart Rev Biol 29:103–137
Deevey GB (1949) The developmental history of Latrodectus mactans (Fabr.) at different rates of feeding. Am Mid Nat 42:189–219
Falconer DS (1989) Quantitative Genetics. Longman, Essex
Gabriel W (1982) Modelling reproductive strategies of Daphnia. Arch Hydrobiol 95:69–80
Green J (1954) Size and reproduction in Daphnia magna (Crustacea: Cladocera). Proc Zool Soc London 124:535–545
Green J (1956) Growth, size and reproduction in Daphnia (Crustacea: Cladocera). Proc Zool Soc London 126:173–204
Hartnoll RG (1985) Growth, sexual maturity and reproductive out-put. In: Wenner AM (ed) Factors in adult growth. Balkema, Rotterdam, pp 101–128
Hrbackova-Esslova M (1962) Postembryonic development of cladocerans I. Daphnia pulex group. Vest Cs Spolec Zool 26:212–233
Ketola M, Vuorinen I (1989) Modification of life-history parameters of Daphnia pulex Leydig and D. magna Straus by the presence of Chaoborus sp. Hydrobiologia 179:149–155
Lewontin RC (1965) Selection for colonizing ability. In: Baker HG, Stebbins GL (eds) The genetics of colonizing species. Academic Press, New York, pp 79–94
Lynch M (1983) Ecological genetics of Daphnia pulex. Evolution 37:358–374
Lynch M (1984) The limits to life history evolution in Daphnia. Evolution 38:465–482
Lynch M (1989) The life history consequences of resource depression in Daphnia pulex. Ecology 70:246–256
McCauley E, Murdoch WW, Nisbet RM, Gurney WSC (1990) The physiological ecology of Daphnia: development of a model of growth and reproduction. Ecology 71:703–715
Porter KG, Orcutt JD, Gerritsen J (1983) Functional response and fitness in a generalist filter feeder, Daphnia magna (Cladocera: Crustacea). Ecology 64:735–742
SAS Institute Inc (1985) SAS User Guide: Statistics, Version 5 Edition. Cary, NC, SAS Institute Inc
Schaffer WM (1974) Selection for optimal life histories: The effect of age structure. Ecology 55:291–303
Schwartz SS, Hebert PDN (1987) Methods for the activation of resting eggs of Daphnia. Freshw Biol 17:373–379
Stearns SC, Koella JC (1986) The evolution of phenotypic plasticity in life-history traits: Predictions of reaction norms for age and size at maturity. Evolution 40:893–913
Taylor BE (1985) Effects of food limitation on growth and reproduction of Daphnia. Arch Hydrobiol Beih Ergeb Limnol 21:285–296
Tessier AJ, Consolatti NL (1989) Variation in offspring size in Daphnia and consequences for individual fitness. Oikos 56:269–276
Urabe J (1988) Effect of food conditions on the net production of Daphnia galeata: Separate assessment of growth and reproduction. Bull Plankton Soc Japan 35:159–174
Uvarov B (1966) Grasshoppers and Locusts. University Press, Cambridge
Vollrath F (1986) Growth, foraging and reproductive success. In: Nentwig W (ed) Ecophysiology of Spiders, Springer, Berlin Heidelberg New York, pp 357–370
Vuorinen I, Ketola M, Walls AM (1989) Defensive spine formation in Daphnia pulex Leydig and induction by Chaoborus crystallinus De Geer. Limnol Oceanogr 34:245–248
Walls AM, Ketola M (1989) Effects of predator-induced spines on individual fitness in Daphnia pulex. Limnol Oceanogr 34:390–396
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Ebert, D. The effect of size at birth, maturation threshold and genetic differences on the life-history of Daphnia magna . Oecologia 86, 243–250 (1991). https://doi.org/10.1007/BF00317537
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DOI: https://doi.org/10.1007/BF00317537