Predation of calanoid copepods on their own and other copepods’ offspring

Boersma, Maarten; Wesche, Anne; Hirche, Hans-Jürgen

doi:10.1007/s00227-013-2373-7

Cited by 26 publications

(15 citation statements)

References 50 publications

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“…It is unclear as to whether this is really the case. Boersma et al (2014) showed that the calanoid copepods also show a large level of carnivory, especially Centropages spp. In contrast to what we observed for Oithona, we saw no such changes in the population densities of Centropages spp.…”

Section: Discussionmentioning

confidence: 99%

Long-term change in the copepod community in the southern German Bight

Boersma

Wiltshire

Kong

et al. 2015

Journal of Sea Research

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157

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Section: Discussionmentioning

confidence: 99%

Long-term change in the copepod community in the southern German Bight

Boersma

Wiltshire

Kong

et al. 2015

Journal of Sea Research

Self Cite

157

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“…Omnivorous copepods can display increased predatory behaviour in the absence of other food (Daan, 1988), and Bonnet et al (2004) suggested that copepods may actively target eggs even when phytoplankton is not limiting. Predation of copepods on their own young stages has been estimated to account for $30% of total mortality of young stages in copepod populations (Boersma et al, 2013). Ohman and Hirche (2001) further described density-dependent mortality through cannibalism in Calanus spp.…”

Section: Predation On Nauplii and Copepodite Stagesmentioning

confidence: 99%

How does Calanus helgolandicus maintain its population in a variable environment? Analysis of a 25-year time series from the English Channel

Maud

Atkinson

Hirst

et al. 2015

Progress in Oceanography

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“…During at least 1 week of acclimation inside the culture room, copepods were kept at 18 • C, at 33 salinity, and under 12:12 h day:night photoperiod for about up to 1 month. They were daily fed in excess with a mixture of algae continuously cultured (Rhodomonas salina, Thalassiosira weissflogii, Tisochrysis lutea, and Tetraselmis suecica, grown under the same condition as for S. marinoi and C. neogracile) at concentration exceeding 10 3 -10 4 cell mL −1 (Berggreen et al, 1988;Vincent et al, 2007), thus avoiding predation of calanoid copepods on younger stages (Bonnet et al, 2004;Boersma et al, 2014). Seawater was renewed every other day by adding 10-20% volume of 1 µm FSW and air was supplied via small bubbles in each rearing tank.…”

Section: Copepod Sampling and Rearing Phasementioning

confidence: 99%

Copepod Grazing Influences Diatom Aggregation and Particle Dynamics

et al. 2019

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In marine ecosystems, carbon export is driven by particle flux which is modulated by aggregation, remineralization, and grazing processes. Zooplankton contribute to the sinking flux through the egestion of fast sinking fecal pellets but may also attenuate the flux by tearing apart phytoplankton aggregates into small pieces through swimming activity or direct ingestion. Freely suspended cells, artificial monospecific aggregates from two different diatom species (Chaetoceros neogracile and Skeletonema marinoi) and natural aggregates of Melosira sp. were independently incubated with five different copepod species (Acartia clausi, Temora longicornis, Calanus helgolandicus, Euterpina acutifrons, and Calanus hyperboreus). During the grazing experiments initiated with free diatoms, E. acutifrons feeding activity evidenced by ingestion rates of 157 ± 155 ng Chl a ind −1 d −1 , induced a significant increase of S. marinoi aggregation. Transparent exopolymeric particles (TEP) production was only slightly boosted by the presence of grazers and turbulences created by swimming may be the main trigger of the aggregation processes. All copepods studied were able to graze on aggregates and quantitative estimates led to chlorophyll a ingestion rates (expressed in Chla a equivalent, i.e., the sum of chlorophyll a and pheopigments in their guts) ranging from 4 to 23 ng Chl a eq ind −1 d −1 . The relation between equivalent spherical diameters (ESDs) and sinking velocities of the aggregates did not significantly change after grazing, suggesting that copepod grazing did not affect aggregate density as also shown by Si:C and C:N ratios. Three main trends in particle dynamics could be identified and further linked to the copepod feeding behavior and the size ratio between prey and predators:(1) Fragmentation of S. marinoi aggregates by the cruise feeder T. longicornis and of Melosira sp. aggregates by C. hyperboreus at prey to predator size ratios larger than 15; (2) no change of particle dynamics in the presence of the detritic cruise feeder E. acutifrons; and finally (3) re-aggregation of C. neogracile and S. marinoi aggregates when the two filter feeders A. clausi and C. helgolandicus were grazing on aggregate at prey to predator size ratios lower than 10. Aggregation of freely suspended cells or small aggregates was facilitated by turbulence resulting from active swimming of small copepods. However, stronger turbulence created by larger cruise feeders copepods prevent aggregate formation and even made them vulnerable to breakage.

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Predation of calanoid copepods on their own and other copepods’ offspring

Cited by 26 publications

References 50 publications

Long-term change in the copepod community in the southern German Bight

Long-term change in the copepod community in the southern German Bight

How does Calanus helgolandicus maintain its population in a variable environment? Analysis of a 25-year time series from the English Channel

Copepod Grazing Influences Diatom Aggregation and Particle Dynamics

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