Zooplankton biomass in an eutrophic shallow lake (Buenos Aires, Argentina): spatio-temporal variations

Claps, María Cristina; Gabellone, Néstor Adrián; Benítez, Hernán Hugo

doi:10.1051/limn/2004018

Cited by 25 publications

(12 citation statements)

References 26 publications

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“…The zooplankton composition of Lacombe Lake appears to be similar to that described for other pampean lakes (Boltovskoy, Dippolito, Foggetta, Gómez & Alvarez 1990; Benítez & Claps 2000; Gabellone, Solari & Claps 2001). Likewise, although there is not much information about zooplankton biomass in pampean shallow lakes, the biomass found in this study (maximum biomass in the lake: 3269 μg dw L −1 ) is comparable with that from other eutrophic shallow environments of Argentina (maximum biomass: 3987 μg dw L −1 ) (Claps et al . 2004).…”

Section: Discussionsupporting

confidence: 76%

“…In the case of zooplanktivorous fish, it is necessary to assess how hydrodynamic conditions and lake morphology might affect zooplankton distribution. For example, in another pampean lake, the Lake Monte, Claps et al . (2004) found that zooplankton distribution differed within the lake.…”

Section: Discussionmentioning

confidence: 99%

“…The pejerrey is mainly a zooplanktivorous fish that feeds mostly on algae and rotifers during its post‐larval stage and cladocerans and copepods during the juvenile and adult stages (Destefanis & Freyre 1972; Ringuelet, Iriart & Escalante 1980). Because pampean lakes are usually eutrophic, zooplankton represents an important and abundant community (Escalante 2001; Claps, Gabellone & Benítez 2004). This feature represents a unique opportunity for developing pejerrey culture based on natural zooplankton as the source of food.…”

Section: Introductionmentioning

confidence: 99%

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Extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow pampean lake in Argentina

Colautti

Souza

Balboni

et al. 2010

Aquaculture Research

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Pejerrey is an important zooplanktivorous native ¢sh of the Argentinean inland waters. It has been traditionally propagated for stocking purposes by relatively costly semi-intensive and intensive methods. In this study, we evaluated the implementation of an extensive culture method by using £oating cages in a shallow pampean lake. Four cages were installed in the Lacombe Lake and stocked with juveniles (16.24 AE 1.69 mm length) at 50 ¢sh m À 3 density for growing until the size of 150 mm, which is considered as a suitable size for stocking. Throughout the experiment, the temperature ranged between 10 and 26 1C and the zooplankton biomass ranged between 12 and 3269 mg dw L À 1 . The growth patterns in the length were similar in the four cages and directly related to the lake thermal conditions and zooplankton availability. The average ¢nal length after 315 days was 154.4 AE 8.8 mm. The survival rates ranged between 53.5% and 64.7% during the ¢rst 110 days and 11.1^25.7% at termination. Growth rate for the ¢rst 2 months was the highest documented for pejerrey culture. This simple technique o¡ers the possibility to produce juvenile pejerrey at a low cost and provides the alternative of reinforcing the natural populations with ¢sh already adapted to the natural environmental conditions. Aquaculture Research, 2010, 41, e376^e384 Floating cage culture of pejerrey in pampean lakes D C Colautti et al.

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Section: Discussionsupporting

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow pampean lake in Argentina

Colautti

Souza

Balboni

et al. 2010

Aquaculture Research

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“…La Salada de Monasterio Lake showed similar limnological and zooplankton community features to other Pampean lakes (Claps et al . ; Colautti et al . ; Diovisalvi, Berasain, Unrein, Colautti, Fermani, Llames, Torremorell, Lagomarsino, Pérez, Escaray, Bustingorry, Ferraro & Zagarese ).…”

Section: Discussionmentioning

confidence: 99%

“…These authors found that the pejerrey extensive cage culture can also reduce costs by not demanding constant attention from staff and not relying on artificial energy supplies, but being mainly dependent on the natural food, in quantity and quality. Since pejerrey feeds on zooplankton (Destefanis & Freyre ; Ringuelet, Iriart & Escalante; Freyre, Colautti, Maroñas, Sendra & Remes Lenicov ), extensive cage culture can take advantage of natural high productivity exhibited by most of the Pampean lakes (Quirós & Drago ; Escalante ; Quirós, Rennella, Boveri, Rosso & Sosnovsky ; Claps, Gabellone & Benítez ), avoiding the provision of artificially cultured living food, which is essential for weaning and for optimal development in early stages.…”

Section: Introductionmentioning

confidence: 99%

Effects of stocking density and natural food availability on the extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow Pampean lake in Argentina

et al. 2013

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An experiment was conducted for 80 days at La Salada de Monasterio Lake (Buenos Aires, Argentina) to assess the effect of stocking density and natural food availability on the growth and production of zooplanktivorous juveniles of pejerrey (Odontesthes bonariensis) in extensive cage culture. Ten cages were installed and stocked with 33-day-old fish, at three density treatments: 25, 50 and 75 ind. m À3 . Zooplankton was analysed in terms of abundance, biomass and diversity considering three size classes. Caged pejerrey diet was assessed regularly. The pejerrey gut contents composition was clearly different from cage zooplankton, showing a trend to contain bigger components. Reared fish exhibited a tendency to diversification of the diet and to change the mean prey size depending on fish length and stocking density. Regression models showed a positive and direct effect of the bigger zooplankton biomass on fish growth rates, which were also inversely affected by the availability of smaller zooplankton. The results demonstrate that stocking density and available zooplankton, in both quantity and quality, are key factors in regulating extensive cage culture of pejerrey. Handling stocking densities in a dynamic way it is possible to maximize fish growth, biomass harvest or fish number according to the goals of production.

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Zooplankton Seasonal Abundance of South AmericanSaline Shallow Lakes

Echaniz¹,

Vignatti²,

Paggi³

et al. 2006

International Review of Hydrobiology

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The central provinces of Argentina are characterized by the presence of a high number of shallow lakes, located in endorheic basins, many of which have elevated salinities as well as eutrophic or hypereutrophic condition. The zooplankton of four saline shallow lakes of the province of La Pampa was studied on a monthly basis during a 2-year period to determine its temporal and spatial variation.The surface of these shallow lakes (< 2.5 m depth) varied between 56.8 and 215.9 ha, and some have from 8.4 to 20.8 g · l -1 . The more saline lakes have "clear" water and the less saline lakes "turbid" water. Fishes, Jenynsia multidentata, were present in only two lakes during the last two months of the studied period.The zooplankton was composed of 17 taxa of Rotifera, 5 taxa of Cladocera and 4 taxa of Copepoda. The low diversity and the faunistic composition are characteristic of saline environments. Although the studied lakes share 38% of the species, the faunistic similarity was higher between the two least saline lakes. The lowest diversity was found in the two most saline lakes.All four shallow lakes were characterized by their very high zooplankton density, especially in the least saline lakes (< 80000 ind · l -1 ). The abundance is significantly correlated with the water transparency but not with salinity.The zooplankton temporal variation was characterized by the alternation of macro-and microzooplankton, probably regulated by competition and intrazooplanktonic predation. In each lake, the spatial abundance distribution of the macro-and microzooplankton was homogeneous. It was related to the shallow depht of the lakes and their polymictic condition.The SCHEFFER model on alternative states in shallow lakes acknowledges that it cannot be applied to saline lakes because Daphnia, the main responsible for the clear water state, is not tolerant to high salinity. Our study shows that the most saline lakes, where the halophylic Daphnia menucoensis is abundant, have also the most clear waters. Another difference that we found with regards to the mentioned model is that, in turbid lakes, it could not have had a top-down control on macrozooplankton exerted by fishes because in these lakes fishes were practically absent.

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Zooplankton biomass in an eutrophic shallow lake (Buenos Aires, Argentina): spatio-temporal variations

Cited by 25 publications

References 26 publications

Extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow pampean lake in Argentina

Extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow pampean lake in Argentina

Effects of stocking density and natural food availability on the extensive cage culture of pejerrey (Odontesthes bonariensis) in a shallow Pampean lake in Argentina

Zooplankton Seasonal Abundance of South AmericanSaline Shallow Lakes

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