2001
DOI: 10.4319/lo.2001.46.4.0953
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Predation by omnivorous copepods on early developmental stages of Calanus finmarchicus and Pseudocalanus spp.

Abstract: Predation is thought to be an important source of mortality in the early life stages of fish and copepods on Georges Bank. Omnivorous copepods may be predators on copepod eggs and nauplii, but data on feeding rates or selectivity are scarce. As part of the GLOBEC Georges Bank program, we generated functional response curves for the omnivorous copepods Metridia lucens, Centropages typicus, and Temora longicornis feeding on the eggs and nauplii of Calanus finmarchicus or Pseudocalanus spp. in shipboard predation… Show more

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Cited by 68 publications
(42 citation statements)
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“…We finally compare our model predictions with measured copepod predation rates on nauplii (e.g. Landry 1980, Daan et al 1988, Sell et al 2001. Essentially, nauplii can be divided into 2 motility types: viz., a jump-sink type that hangs motionless in the water while slowly sinking and occasionally interrupts the sinking by a brief hop, and a type with more or less constant swimming (cruising).…”
Section: Discussionmentioning
confidence: 99%
“…We finally compare our model predictions with measured copepod predation rates on nauplii (e.g. Landry 1980, Daan et al 1988, Sell et al 2001. Essentially, nauplii can be divided into 2 motility types: viz., a jump-sink type that hangs motionless in the water while slowly sinking and occasionally interrupts the sinking by a brief hop, and a type with more or less constant swimming (cruising).…”
Section: Discussionmentioning
confidence: 99%
“…Combining these values with a clearance rate of 0.2 l predator -1 .d -1 (Sell et al, 2001), and a carbon weight for the predator of 7 μg C (Davis, 1984), the predation rates are 0.06 and 0.13 mg C.predator C -1 .day -1 for winter and spring, respectively. The 5-year average densities of predatory copepods (E.G.…”
Section: Carnivorous Zooplanktonmentioning
confidence: 99%
“…White 1979). They are omnivores, which feed on protozoans and large phytoplankton, while phytoplankton <10 lm are not taken if there is enough large food (Katechakis et al 2002;Kleppel 1993;Sell et al 2001;Sommer and Stibor 2002). This could lead to the following consequences of warming to the spring succession in the Baltic Sea: an earlier onset of calanoid copepod grazing would reduce the biomass of large phytoplankton while releasing small phytoplankton from grazing pressure by protozoans.…”
Section: Motivationmentioning
confidence: 99%