Incidence of diapause varies among populations of Daphnia pulicaria

Oecologia
Carla E Cáceres, Alan J Tessier

Abstract

Dormancy is a common way in which organisms survive environmental conditions that would be lethal to the active individual. However, while dormant, individuals forego reproduction. Hence theory suggests an optimal time in which to enter dormancy, depending on risks associated with both remaining active and entering dormancy. When these relative risks differ among habitats, dormancy strategies are predicted to vary as well. For freshwater zooplankton, it has been suggested that sensitivity to the cues that initiate dormancy should be selected against when females have the opportunity to remain in the water column year round. We tested this prediction with 12 populations of lake-dwelling Daphnia pulicaria (Crustacea: Cladocera). Differences among lakes in basin morphometry, predators and resources create a gradient of risk for Daphnia in the water column. Some populations persist in high numbers year round while others are abundant only in spring. We used this difference in persistence ability as an estimate of risk in the water-column. For 3 years of field sampling we found consistent differences among the lake populations in the incidence of dormancy. In some populations, only a small fraction of females switched to producing d...Continue Reading

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Citations

Mar 11, 2008·BMC Evolutionary Biology·Meghan A DuffyJeffrey K Conner
May 31, 2012·Comparative Biochemistry and Physiology. Toxicology & Pharmacology : CBP·Winfried LampertPetter Larsson
Jun 3, 2009·Evolution; International Journal of Organic Evolution·Sébastien Gourbière, Fréderic Menu
May 29, 2009·Evolution; International Journal of Organic Evolution·Carla E CáceresKimberly A Paczolt
Sep 22, 2012·Journal of Evolutionary Biology·H A Smith, T W Snell
Mar 3, 2012·Evolution; International Journal of Organic Evolution·Desiree E Allen, Michael Lynch
Sep 30, 2015·Evolution; International Journal of Organic Evolution·Anne C RoulinDieter Ebert
May 1, 2013·Integrative and Comparative Biology·Matthew R Walsh
Aug 29, 2020·Genome Biology and Evolution·Swatantra Neupane, Sen Xu
Sep 15, 2009·The Journal of Experimental Biology·Syuhei BanKinya Nishimura
Oct 1, 2021·Journal of Evolutionary Biology·Yan R GalimovAndrey V Tchabovsky

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