The effects of herbivorous zooplankton on the sedimentation of particles out of the euphotic zone are examined with mathematical models, a large-scale field experiment, and descriptive data from a eutrophic lake. The theory is rooted in the population dynamics of phytoplankton and zooplankton and so explicitly accounts for the potential effect of zooplankton grazing on primary production and th...

Pelagic crustacean zooplankton were collected from 336 Norwegian lakes covering a wide range of latitude, altitude, lake area, mean depth, production (as chlorophyll a), and fish community structure. Mean zooplankton species richness during the ice-free season was generally low at high latitudes and altitudes. Further, lower species richness was recorded in western lakes, possibly reflecting co...

The present study was carried out on the seasonal abundance and diversity of zooplankton in a semi- intensive prawn farm of Bagerhat district from July to December, 2008. Plankton samples were collected by conical shaped monofilament nylon net (Plankton net) and Lugol's solution was used for preservation. The zooplankton abundance was influenced by physico-chemical factors. During the study per...

[1] There has been a question as to whether the optical plankton counter (OPC) accurately measures zooplankton density and biomass in large lakes, oceans, and estuaries. Results from our Lake Michigan surveys in 1998–2000 often revealed poor agreement between the OPC-2T and 153-mm mesh plankton net samples. The most serious common problem was overestimation of zooplankton biomass by the OPC rel...

In this study, we investigated, for the first time, the potential impact of environmental changes on zooplankton abundance over a fourteen year period (2000-2013) at an offshore station in the Eastern Mediterranean Sea (the Levantine basin, offshore Lebanon). Samples were collected monthly and analyzed using the semi-automated system ZooScan. Salinity, temperature and phytoplankton abundance (n...

Based on the vertical stratified zooplankton samples collected during the autumns (September–December) of 1996 to 1998, vertical distribution, biomass, and community structure of zooplankton and calanoid copepods in the southern Okhotsk Sea were evaluated and compared with those of the same period in the Oyashio region. In terms of fauna, zooplankton in the Okhotsk Sea are similar to that in th...

During the past several decades, high numbers of gelatinous zooplankton species have been reported in many estuarine and coastal ecosystems. Coupled with media-driven public perception, a paradigm has evolved in which the global ocean ecosystems are thought to be heading toward being dominated by “nuisance” jellyfish. We question this current paradigm by presenting a broad overview of gelatinou...

Harlan County Reservoir, located in south-central Nebraska, entered a drought in 2003, providing an opportunity to monitor the effects of drought on the zooplankton community in this irrigation reservoir. We sampled the zooplankton community at 15 standardized locations every other week from April through the third week of October from 2003-2011. Total zooplankton densities were higher (131.8 ±...

Stable carbon isotopes were used to determine the contribution of emergent demersal zooplankton to the diet of the scyphozoan jellyfish, Catostylus mosaicus, at Smiths Lake, New South Wales, Australia. A preliminary study in 2004 indicated that there was no difference in the δC of ectodermal tissue and mesoglea of the medusae. In 2005, medusae and zooplankton present during the day and night we...

Stable carbon isotopes were used to determine the contribution of emergent demersal zooplankton to the diet of the scyphozoan jellyfish Catostylus mosaicus at Smiths Lake, New South Wales, Australia. A preliminary study in 2004 indicated that there was no difference in the dC of ectodermal tissue and mesoglea of the medusae. In 2005, medusae and zooplankton present during the day and night were...