The Relationship Between Body Size of Filter‐feeding Cladocera and the Maximum Size of Particle Ingested

Abstract

The maximum size of plastic bead ingested by Bosmina Zongirustris and six species of Daphnia increased with increasing body size of the animals. The relationship between the diameter (,u) of the largest bead ingested ( y ) and carapace length (x, in mm) is given by an expression, y = 22x + 4.87. This relationship could be used to predict which members of a phytoplankton community would be available as food for different-sized --

Indirect effect of environmental factors on interactions between microbial and classical food webs in freshwater ecosystems

“…Planktonic crustaceans can be protected against predation by water turbidity, for suspended particles severely disturb prey detection by fish due to their effects on light scattering (Horppila et al, 2004). Because water transparency is important in order for crustaceans to avoid predators, it has less importance for their foraging since cladocerans forage unselectively (Burns, 1968), and copepods use mechanoreceptors to detect their prey (Williamson, 1986) and chemoreceptors to capture the most nutritional particles (Paffenho¨fer and Van Sant, 1985). Insignificant differences in food web interactions were found between low and high transparency conditions.…”

Effects of microcystin-producing and microcystin-free strains ofPlanktothrix agardhiion long-term population dynamics ofDaphnia magna

“…There are several kinds of defence strategies. Morphological defences include not only the formation of colonies and filaments that are difficult to handle by zooplankton (Burns, 1968) but also the development of spines or thorns (Lu¨rling and Van Donk, 1997;Hamlaoui et al, 1998;Lu¨rling, 2003a). Chemical defences are the production of organic compounds that are toxic for grazers *Corresponding author: florence.hulot@u-psud.fr (Carmichael, 1992;Turner and Tester, 1997;Tillmann and John, 2002).…”

Impact of algae and their concentrations on the reproduction and longevity of cladocerans

“…Algae species were chosen according to the following two criteria: (1) Chlorophycean algae are a source of nutrients suitable for cladocerans growth and development and, if supplied in adequate amounts, they can increase cladoceran fecundity (Price et al 1990, Martínez-Jerónimo et al 1994, Martínez-Jerónimo 1995. (2) Size of algae that can be readily assimilated is between 8 and 15 Ȗm, according to the Burns equation (Burns 1968), and the selected species are within this range. On the other side, the differences in their shape and size and their permanence in suspension in the test solution are additional factors to be considered.…”

“…Suspended-particle filtration is a mechanical process with no feeding particle selectivity (Ivleva 1973); however, they maintain selective consumption of food because the post-abdominal claw separates feeding components from minerals. Burns (1968) defined a formulaic relationship between cladoceran size and the feeding particle, making it possible to infer what food items can be consumed under natural conditions; this information can be applied to cladocerans when cultivated under controlled conditions.…”