Cladoceran body size and vulnerability to copepod predation

Gliwicz, Z. Maciej; Umaña, Gerardo

doi:10.4319/lo.1994.39.2.0419

Cited by 75 publications

(48 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Food webs where invertebrate predators are important cannot be modeled as a simple chain; food chain models may therefore give incorrect predictions in this situation. Since large zooplankton such as Daphnia are often too large for many invertebrate predators to consume, Daphnia are generally less vulnerable to invertebrate predators than are smaller zooplankton (Kerfoot, 1977;Zaret, 1980;Elser et al, 1987;Riessen et al, 1988;Gliwicz & Umana, 1994). Thus, the fact that cascade effects occur most often in Daphnia-dominated lakes may be due to the fact that these food webs can often be well approximated as a simple chain, whereas this would not be a good approximation in many lakes where small-bodied zooplankton are prevalent.…”

Section: Introductionmentioning

confidence: 93%

Intraguild Predation, Invertebrate Predators, and Trophic Cascades in Lake Food Webs

Hart

2002

Journal of Theoretical Biology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 93%

Intraguild Predation, Invertebrate Predators, and Trophic Cascades in Lake Food Webs

Hart

2002

Journal of Theoretical Biology

View full text Add to dashboard Cite

“…Cyclopoids are usually described as selecting smaller prey items from the available prey size spectrum (Brand1 and Fernando 1975;Gliwicz and Umana 1994). However, factors such as predator hunger, prey shape, hardness, and behavior, and the availability of alternate prey are at least as important as prey size (Li and Li 1979;Williamson 1980;Stemberger 1985).…”

Section: Limnolmentioning

confidence: 99%

Trophic relations between cyclopoid copepods and ciliated protists: Complex interactions link the microbial and classic food webs

Wickham¹

1995

Limnology & Oceanography

View full text Add to dashboard Cite

Two field experiments examined the effects of cyclopoid copepods on ciliates. The presence or absence of Cyclops abyssorum, Cyclops kolensis, and zooplankton > 64 µm was manipulated to determine the relative importance of direct cyclopoid predation on protists vs. indirect effects mediated through cyclopoid predation on other metazooplankton. In the second experiment, presence or absence of C. abyssorum was cross‐classified with five concentrations of the metazooplankton community. Cyclopoid effects on ciliates were dependent on predator and prey species and on the abundance of alternate prey for cyclopoids. A trophic cascade was also observed, but only for two small ciliates, and only with the larger C. abyssorum. C. abyssorum had a stronger predation effect on oligotrich ciliates when metazooplankton had been removed, and this effect appeared at a lower metazooplankton concentration with a larger ciliate, compared to a smaller species of the same genus. These results suggest that for cyclopoid‐ciliate interactions, switching behavior in the predator may be at least as important as a trophic cascade.

show abstract

“…Adult cyclopoid copepods are commonly accepted to be predaceous, and as a result the predator-prey interaction between cyclopoid copepods and cladocerans has been studied in some detail (e.g. Kerfoot, 1977;Gliwicz, 1994;Gliwicz & Umana, 1994). Nevertheless, not all of the copepod species and stages are predaceous, and many feed on protists and algae (Santer & van den Bosch, 1994;Ju¨rgens et al, 1996), but with a different feeding mode compared to herbivorous cladocerans.…”

Section: Introductionmentioning

confidence: 99%

Differential Impacts of Copepods and Cladocerans on Lake Seston, and Resulting Effects on Zooplankton Growth

Becker

Feuchtmayr

Brepohl³

et al. 2004

Hydrobiologia

View full text Add to dashboard Cite

In an enclosure study in Scho¨hsee, a small mesotrophic lake in Northern Germany, the impact of copepods and daphniids on the seston community was studied. In general, these two guilds differ in their feeding behaviour. Copepods actively select their food, with a preference for larger particles, whereas most cladocerans are unselective filter-feeders. In this study we investigate how the impact of the two different grazers affects zooplankton growth. We combine results obtained in the laboratory with results measured in situ in the enclosures. Copepods and cladocerans were cultured on seston from enclosures that were inhabited by density gradients of copepods or daphniids. We observed that Daphnia grew faster on seston that was pre-handled by copepods than on seston that was pre-handled by daphniids, and that somatic growth decreased with increasing densities of daphniids in the enclosures. In contrast, we observed no differences in development rates for copepods grown on the different media. The population growth rates of Daphnia in the Daphnia treatments were determined in the enclosures. Growth differences in both somaticand population growth of Daphnia were correlated to food quality aspects of the seston. In the laboratory we found that Daphnia growth was correlated with several fatty acids. The strongest regression was with the concentration of 20:4x3 (r 2 ¼ 0.37). This particular fatty acid also showed the highest correlation with growth after normalisation of the fatty acids to the carbon content of the enclosures (r 2 ¼ 0.33). On the other hand, in the enclosure the population growth correlated most to the particulate nitrogen content (r 2 ¼ 0.78) and only to the N:C ratio, when normalised to carbon (r 2 ¼ 0.51).

show abstract

Cladoceran body size and vulnerability to copepod predation

Cited by 75 publications

References 13 publications

Intraguild Predation, Invertebrate Predators, and Trophic Cascades in Lake Food Webs

Intraguild Predation, Invertebrate Predators, and Trophic Cascades in Lake Food Webs

Trophic relations between cyclopoid copepods and ciliated protists: Complex interactions link the microbial and classic food webs

Differential Impacts of Copepods and Cladocerans on Lake Seston, and Resulting Effects on Zooplankton Growth

Contact Info

Product

Resources

About