Population dynamics and estimation of production in Bosmina longirostris (O. F. Müller) in the River Danube (Danubialia Hungarica, CVIII)

Bothár, Anna

doi:10.1007/bf00007563

Cited by 14 publications

(6 citation statements)

References 17 publications

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“…The majority of investigations were carried out in reservoirs, dead arms, and ox-bow lakes . Comparing our results with those from standing waters, abundance and production values are smaller in the Danube but turnover times are shorter (Bothar, 1986(Bothar, , 1987 . Average values of gross primary production in various rivers (g C m -2 d -' ).…”

Section: Discussionsupporting

confidence: 50%

“…About 70% of the copepod individuals were in nauplius stage during the growing season (Fig . longirostris (Bothar, 1986) . Two peak periods can also be observed in the biomass pattern of copepods .…”

Section: Resultsmentioning

confidence: 99%

“…For estimation of the production of Bosmina longirostris the recruitment time was used (for detailed description see Bothar, 1986) . The calculation of the production ofAcanthocyclops robustus was carried out by the technique of growth increment summation as suggested by Rigler & Downing (1984).…”

Section: Materials and Methods Study Areamentioning

confidence: 99%

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Phytoplankton and zooplankton (Cladocera, Copepoda) relationship in the eutrophicated River Danube (Danubialia Hungarica, CXI)

Bothár

Kiss

1990

Hydrobiologia

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The seasonal variation in primary production, individual numbers, and biomass of phyto-and zooplankton was studied in the River Danube in 1981 . The secondary production of two dominant zooplankton species (Bosmina longirostris and Acanthocyclops robustus) was also estimated . In the growing season (April-Sept .) individual numbers dry weights and chlorophyll a contents of phytoplankton ranged between 30-90 x 10 6 individuals, l -', 3-12 mg 1 -', and 50-170µg 1 -1 , respectively . Species of Thalassiosiraceae (Bacillariophyta) dominated in the phytoplankton with a subdominance of Chlorococcales in summer . Individual numbers and dry weights of crustacean zooplankton ranged between 1400-6500 individuals M-3 , and 1.2-12 mg m-3, respectively . The daily mean gross primary production was 970 mg C m-3 d -1 , and the net production was 660 mg C m-3 d -' . Acanthocyclops robustus populations produced 0 .2 mg C m-3 d -1 as an average, and Bosmina longirostris populations 0 .07 mg C m-3 d -'. The `ecological efficiency' between phytoplankton and crustacean zooplankton was 0 .03 % . M J J J A J A S S ----Bosmina longirostris

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Section: Discussionsupporting

confidence: 50%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Phytoplankton and zooplankton (Cladocera, Copepoda) relationship in the eutrophicated River Danube (Danubialia Hungarica, CXI)

Bothár

Kiss

1990

Hydrobiologia

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“…Schulz & Sterner (1999) showed a similar trend in Bosmina (leideri) for early growth stages (to day 7). Bothar (1986Bothar ( , 1987 also reported a high growth rate of riverine Bosmina (River Danube, Hungary). The mean brood size in our Scenedesmus treatment was similar to that of the phosphorus rich, high quantity treatment of Schulz & Sterner (1999) and the 0.25 mg C L )1 treatment of Urabe (1991); however Urabe had slightly higher mean brood size (approximately nine versus six per clutch) at 2.5 mg C L )1 .…”

Section: Discussionmentioning

confidence: 97%

Dietary effects on life history traits of riverine Bosmina

2005

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1. We compared growth, reproduction and life history characteristics of Bosmina raised on Ohio River seston versus a unialgal culture (Scenedesmus acutus), to assess potential nutritional constraints experienced by riverine populations. 2. Bosmina grew well in both treatments during their juvenile stage. Analysis of variance showed that Bosmina growth prior to the start of reproduction did not differ significantly between the treatments. After the onset of reproduction Bosmina fed on Scenedesmus grew faster and exhibited higher fecundity than their counterparts fed river seston. 3. Significant quantities of triacylglycerol (visible lipid droplets) were gradually accumulated in Bosmina fed on Scenedesmus. Visual lipid ovary indices were positively correlated with adult growth rate and fecundity and negatively correlated with longevity. 4. Biochemical analysis showed that Scenedesmus had significantly greater total x3, x6 and polyunsaturated fatty acids (PUFA) whereas river seston had more eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). Thus, in contrast to Daphnia, EPA and DHA do not appear to influence Bosmina growth or reproductive performance, but linolenic acid or total PUFA may be important. 5. Comparatively weak performance by Bosmina feeding on river seston suggest that nutritional constraints may be important despite high particulate organic carbon and low C : N and C : P of river seston.

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“…Table I), indicating that transport of zooplankton biomass (including egg-bearing females), represents also production in other places. In fact, the activities of metazoan plankton in running waters have usually been estimated from experiments in confined conditions, by measuring either recruitment times (Bothar, 1986), development times (Zoufal, 1989), grazing rates by radiotracer methods (Gosselain et al, 1996;Kobayashi et al, 1996), or growing rates in potamocorral enclosures in which organisms are protected by mesh nets (Thorp et al, 1996;Viroux, 2000). Using fluorescent micro-spheres, Kim et al (2000) gave accurate results about the food preferences of several rotifers.…”

Section: A Challenge For Potamoplankton: Eat To Be Fruitful and Multiplymentioning

confidence: 99%

A review of regulation mechanisms of metazoan plankton in riverine ecosystems: aquatic habitat versus biota

2006

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This review summarizes the key factors of a series of articles about animal plankton in rivers, a topic that remains poorly investigated. Running water, in which sampling processes are variable and often difficult, acts as a constraint as well as a resource for plankton. Assessment of the potamoplankton reveals that good swimmers of the true plankton are mixed with numerous poor swimmers among littoral and epibenthic forms. Small taxa dominate communities in most of rivers all over the world and, in comparison with crustaceans; the successful development of rotifers rests on their shorter development times. According to hydraulic and geomorphological features, the diversity of the habitats and the ability of individuals to avoid washout was examined, decrease in flow creating standing zones favourable to zooplankton development. Many species can find suitable conditions for the development of dense populations in stream habitats and examples of taxa-specific response, regardless of the habitat structure, are observed. While the challenge for riverine plankton remains 'eat to be fruitful and multiply', their activities have been poorly investigated in turbulent conditions, those able to continue growing in a current of 20 cm s À1, such as brachionid species, being usually dominant in rivers. Examination of the distribution of plankton populations, in the Middle Loire and in other rivers, showed that the flow regime, which plays a central role in organizing river habitats, explains the presence/absence of these fast-growing organisms. While reservoirs are major sources of crustaceans, lateral exchanges as well as downstream transport are important in determining the plankton. These ecosystems are primarily governed by abiotic factors, biological control taking place after physical control has happened. Because animals arrive by chance in any habitat during dispersion, zooplankton in rivers remains primarily governed by unpredictable physical processes and depends on the age of the water and the availability of habitats. In this way, the hydro-dynamics of river habitats need to be more documented with regard to their key role in the planktonic life. Preservation of the lentic areas remaining at the heart of the matter, the contrasting ecology of the rotifers should be a reliable tool with which to estimate the changes in habitats diversity of main channels, particularly during droughts, while crustacean's diversity would be more representative of flood plain annexes, particularly during flood events.

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Population dynamics and estimation of production in Bosmina longirostris (O. F. Müller) in the River Danube (Danubialia Hungarica, CVIII)

Cited by 14 publications

References 17 publications

Phytoplankton and zooplankton (Cladocera, Copepoda) relationship in the eutrophicated River Danube (Danubialia Hungarica, CXI)

Phytoplankton and zooplankton (Cladocera, Copepoda) relationship in the eutrophicated River Danube (Danubialia Hungarica, CXI)

Dietary effects on life history traits of riverine Bosmina

A review of regulation mechanisms of metazoan plankton in riverine ecosystems: aquatic habitat versus biota

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