holoplankton


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holoplankton

[‚häl·ō′plaŋk·tən]
(zoology)
Organisms that live their complete life cycle in the floating state.
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Among the samples, copepods and cladocera were analyzed at species or genus level, while other holoplankton and meroplankton were analyzed at group level.
Based on seasonal zooplankton distribution, 29 species of copepods, 4 species of cladocera, 11 groups of holoplankton and 9 groups of meroplankton were determined in spring; 17 species of copepods, 4 species of cladocera and 8 groups of holoplankton and meroplankton, respectively, were determined in summer; 23 species of copepods, 2 species of cladocera, 10 groups of holoplankton and 7 groups of meroplankton were determined in autumn and 34 species of copepods, 12 groups of holoplankton and 7 groups of meroplankton were determined in winter (Table ID).
Other holoplankton was determined as 34% in horizontal autumn haul and 35% in vertical haul.
At Cahuita, the meroplankton does not exceed the abundance and diversity of the holoplankton.
If such larvae can actively avoid the substrate, as do some holoplankton (Sebens and Koehl 1984), the 1-5 cm sample would have the lowest larval densities.
One group of holoplankton, the copepods (coh' pah pods), deserves special mention.
During the CIMAR 16 Fjords cruise, 238,673 ind were counted from the meroplankton and holoplankton taxa (41.
In summary, holoplankton numerically dominated meroplankton in the neuston communities along the western margin of the Magellan Region during spring oceanographic conditions.
Organisms which are part of zooplankton are either classified as holoplankton or meroplankton on the basis of the time they remain on the planktonic communities; the first are part of the zooplanktonic communities during all their life cycle, have relatively low diversity and are dominated by copepods, in abundance and biomass (Longhurst 1985).
In recent studies holoplankton chaetognaths of the species Sagitta friderici were found showing a seasonal variation of abundance (Hossfel 1996) and Morales and Vargas (1995) give a list of 12 calanoid species for the outer part with species of copepods Acartia lilljeborgii and Paracalanus parvus, being very common.
Among holoplankton, chaetognaths and appendicularians (Oikopleura spp.
Characteristic Microzooplankton Taxa 29 Species 11 Holoplankton min-max (ind 0.