Predatory impact of Leptodora kindtii on zooplankton community in the Slapy Reservoir

Although predation has been identified as an important community driver, the role of predator diversity in structuring estuarine zooplankton has not been assessed. As such, we investigated the effects of two different zooplanktivorous fish species on the estuarine zooplankton community during a 12-day mesocosm study. Three experimental treatments were established, whereby natural zooplankton communities were subject to either (1) no predatory pressure, (2) predation by a pelagic predator (Monodactylus falciformis) or (3) predation by a hyper-benthic predator (Glossogobius callidus). The pelagic feeding M. falciformis fed largely on the numerically dominant mid-water copepod species, Paracartia longipatella. In contrast, the hyper-benthic fish had a greater predatory impact on the less numerically dominant copepod, Pseudodiaptomus hessei, which demonstrates strong diel vertical migration. Variations in prey-population regulation are ascribed to the distinct behavioural differences of the predators, and mediated by the differences in behaviour of the copepod species.

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Seasonal development of scyphozoan medusae and the predatory impact of Aurelia aurita on the zooplankton community in the Bornholm Basin (central Baltic Sea)

Marine Biology ◽

10.1007/s00227-005-1572-2 ◽

2005 ◽

Vol 147 (2) ◽

pp. 465-476 ◽

Cited By ~ 31

Author(s):

K. Barz ◽

H.-J. Hirche

Keyword(s):

Baltic Sea ◽

Zooplankton Community ◽

Aurelia Aurita ◽

Seasonal Development ◽

Bornholm Basin ◽

Predatory Impact

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Zooplankton Community and Species Responses to a Natural Turbidity Gradient in Lake Temiskaming, Ontario–Quebec

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f86-080 ◽

1986 ◽

Vol 43 (3) ◽

pp. 665-673 ◽

Cited By ~ 22

Author(s):

Erik R. Zettler ◽

John C. H. Carter

Keyword(s):

Zooplankton Community ◽

Daphnia Galeata ◽

Mysis Relicta ◽

Leptodora Kindtii ◽

Turbid Waters ◽

Fish Predators ◽

Vertical Distributions ◽

Crustacean Plankton ◽

Daphnia Galeata Mendotae ◽

Plankton Community Structure

Lake Temiskaming, a long, narrow lake between Ontario and Quebec, contains a permanent turbidity gradient, although seasonal turbidity values continually change throughout. Polar ordination indicated that the crustacean plankton community structure was closely related to the first (turbidity) axis. Mean body size was also positively related to turbidity, suggesting that reduced transparency in turbid waters might protect large zooplankters from visually seeking fish predators. Mysis relicta and Leptodora kindtii, the two largest species, were most abundant at the lake's turbid (northern) end with declining numbers toward the clear (southern) end. Many smaller copepods and cladocerans showed reduced numbers at the northern stations during the turbidity maximum in early June, possibly because of impaired feeding ability, after which they progressively increased through the season relative to numbers in the south. Daphnia galeata mendotae failed to show this seasonal increase at the turbid end, possibly because of selective cropping by Mysis and Leptodora. Many species displayed somewhat higher midday vertical distributions in turbid than in clear waters.

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The Influence of Fish–Zooplankton–Phytoplankton Interactions on the Results of Selenium Toxicity Experiments Within Large Enclosures

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f85-140 ◽

1985 ◽

Vol 42 (6) ◽

pp. 1132-1143 ◽

Cited By ~ 14

Author(s):

A. Salki ◽

M. Turner ◽

K. Patalas ◽

J. Rudd ◽

D. Findlay

Keyword(s):

Seasonal Changes ◽

Biotic Interactions ◽

Zooplankton Community ◽

Dominant Factor ◽

Sediment Control ◽

Zooplankton Community Structure ◽

Leptodora Kindtii ◽

Chronic Effects ◽

Species Dynamics ◽

Factor Governing

The response of zooplankton to sodium selenite at concentrations of 1,10, and 100 μg Se∙L−1was studied using large (100 m3) enclosures in mercury-contaminated Clay Lake, Ontario (50°03′N, 90°30′W). Crustacean community development in treated enclosures exhibited no obvious acute or chronic effects from the range of selenium concentrations applied. Seasonal changes in zooplankton composition, abundance, and reproduction were similar among controls and the 1 and 10μg Se∙L−1enclosures. Differences in species dynamics observed in the 100 μg Se∙L−1enclosure and in a sediment control enclosure were attributable to biotic interactions rather than selenium. Predation appeared to be the dominant factor governing zooplankton community structure in all enclosures. Differences in the number of planktivorous fish among enclosures led to variations in the abundance of predatory Leptodora kindtii, which in turn affected abundances of the small cladoceran Bosmina longirostris.

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Invasive ctenophore Mnemiopsis leidyi in the Caspian Sea: feeding, respiration, reproduction and predatory impact on zooplankton community

Marine Ecology Progress Series ◽

10.3354/meps314171 ◽

2006 ◽

Vol 314 ◽

pp. 171-185 ◽

Cited By ~ 44

Author(s):

GA Finenko ◽

AE Kideys ◽

BE Anninsky ◽

TA Shiganova ◽

A Roohi ◽

...

Keyword(s):

Caspian Sea ◽

Zooplankton Community ◽

Mnemiopsis Leidyi ◽

The Caspian Sea ◽

Predatory Impact

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Spatial Distribution, Population Structure, and Predatory Impact of Gelatinous Predators on Zooplankton Community in Inshore Waters off Crimean Coast of the Black Sea

Journal of Siberian Federal University Biology ◽

10.17516/1997-1389-0336 ◽

2021 ◽

pp. 168-181

Author(s):

Galina A. Finenko

Keyword(s):

Size Structure ◽

Zooplankton Community ◽

South Coast ◽

The Black Sea ◽

Mnemiopsis Leidyi ◽

The South ◽

Entire Area ◽

Inshore Waters ◽

Predatory Impact ◽

Large Animals

The study reports the data on the distribution and predatory impact of the gelatinous macroplankton on mesozooplankton in the inshore waters of Crimea in April 2016. In the study areas, gelatinous macroplankton comprised Scyphomedusae Aurelia aurita (Linnaeus, 1758) and three ctenophore species (Mnemiopsis leidyi A. Agassiz, 1865, Beroe ovata Bruguire, 1789, and Pleurobrachia pileus (O. F. Müller, 1776). The biomass of A. aurita dominated everywhere and varied from ~ 62 to 330 g·m‑2 in different areas. The largest A. aurita biomass was observed in the South Coast of Crimea and the smallest in Karkinitsky Bay, where the number of jellyfish was high, suggesting the predominance of small individuals in the population. The size structure of A. aurita population differed by region: the proportion of large animals increased from the West to the East. The abundance and biomass of M. leidyi were rather low: 0.33–1.45 ind·m‑2 and 1–51.7 g·m‑2, respectively (the exception was the position in the Kerch Strait, where M. leidyi abundance reached 2 ind. m‑2 and biomass 126.3 g·m‑2); that species occurred only at 33–45 % of the stations (the exception was Karkinitsky Bay – 17 %), with the maximum values in the South Coast of Crimea. Large, 55–70-mm, adult individuals predominated. P. pileus biomass was lower than the biomass of A. aurita and M. leidyi in all areas, but its abundance was much higher. The daily rations of A. aurita varied widely both in the entire area and from one region to another. The daily ration values correlated with the carbon content in A. aurita body. The predation pressure of A. aurita on zooplankton in the inshore waters of Crimea was very low and did not result in a crucial decrease in mesozooplankton abundance. The effect of M. leidyi, even with its low abundance and biomass, was much stronger

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Abundance dynamics and functional role of predaceous Leptodora kindtii in the Curonian Lagoon

Open Life Sciences ◽

10.2478/s11535-011-0098-5 ◽

2012 ◽

Vol 7 (1) ◽

pp. 91-100

Author(s):

Jūratė Lesutienė ◽

Anna Semenova ◽

Evelina Grinienė ◽

Zita Gasiūnaitė ◽

Viktorija Savickytė ◽

...

Keyword(s):

Active Sites ◽

Small Body ◽

Zooplankton Community ◽

Fish Predation ◽

Curonian Lagoon ◽

Daily Consumption ◽

Leptodora Kindtii ◽

Population Peak ◽

Estuarine Lagoon ◽

Peak Abundance

AbstractThe abundance and distribution of predatory cladoceran Leptodora kindtii was investigated in the estuarine lagoon (Curonian Lagoon, SE Baltic Sea). Three hydrodynamically different parts of the lagoon were selected, representing transitory oligohaline, intermediate freshwater and stagnant freshwater sites. L. kindtii was least abundant at the oligohaline site, never occurring at salinities greater than 4 psu. At the two freshwater sites, the abundance of L. kindtii varied from a low of <0.1 up to 2.2 indv. L−1 during peak abundance. Two peaks of L. kindtii abundance were observed with timing differences between stations: at the stagnant site the population of L. kindtii peaked two weeks earlier relative to the more hydrodynamically active sites, likely due to a 2°C higher May temperature. The small body size of L. kindtii in the lagoon (seasonal mean 2.68±0.6 mm) shows high fish predation pressure and predicts small cladocerans, juvenile copepods and rotifers being in the preferred prey size range. The calculated L. kindtii daily consumption during the population peak was as high as 100% of the daily zooplankton production, which implies high potential of this predator to shape the grazing zooplankton community in the lagoon.

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