Chronic effect of NaCl salinity on a freshwater strain of Daphnia magna Straus (Crustacea: Cladocera): A demographic study

Martínez‐Jerónimo, Fernando; Martínez-Jerónimo, Laura

doi:10.1016/j.ecoenv.2006.08.009

Cited by 74 publications

(49 citation statements)

References 16 publications

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“…Halotolerance values for other cladocerans have also been reported using laboratory assays. Martı´nez-Jero´nimo and Martı´nez-Jero´nimo (2007) reported a 48 h LC 50 of 5.48 g L x1 for D. magna, while demonstrating that acclimated organisms could survive and reproduce in NaCl concentrations up to 6 g.L…”

Section: Discussionmentioning

confidence: 99%

“…Such physiological plasticity is likely due to genetic factors associated with osmoregulation shifts (Arne´r and Koivisto, 1993;Aladin and Potts, 1995;Martı´nez-Jero´nimo and Martı´nez-Jero´nimo, 2007). The degree of phenotypic plasticity to environmental fluctuations is naturally framed within the populations' genetic variability, which is greatly influenced by founder effects and locally acting selective forces (De Meester, 1996a, 1996bBoersma et al, 1999;De Meester et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Genetic variability in the tolerance of natural populations ofSimocephalus vetulus(Müller, 1776) to lethal levels of sodium chloride

Loureiro

Castro

Claro

et al. 2012

Ann. Limnol. - Int. J. Lim.

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-Using several clonal lineages of Simocephalus vetulus (Cladocera, Daphniidae) as a random sample, we investigated the genetic component of the halotolerance of one brackish and two freshwater populations of this littoral filter feeder. We hypothesized that genotypes from the brackish population were more tolerant than freshwater ones, via adaptation to local environmental conditions. Clonal identity was established by a cost-effective molecular fingerprinting technique (microsatellite-primed polymerase chain reaction (MSP-PCR)). Two distinct methodologies were used to assess cladoceran sensitivity to syntheticgrade sodium chloride (NaCl): (i) standard 48-h acute assays and (ii) 12-h survival time (ST) trials. No correlation was found between acute EC 50 and ST values. The sensitivity of brackish and freshwater clones was comparable in terms of acute EC 50 (varied from 2.28 to 3.83 g.L x1). On the contrary, genetically determined differential tolerance to NaCl among populations was found for ST: all brackish genotypes, except one, were more resilient (ST > 120 min) than freshwater clones (ST < 120 min). Bearing in mind that these results were obtained with isolates from the extant population, it is surprising that the range of acute sensitivity of the freshwater and brackish genotypes was similar, and that the only difference between them was the ability of brackish clones to survive longer under high salinity stress (6 g.L x1, in ST trials). We must conclude that the effect of salinity (original environment context) on the selection of genotypes was weaker than we had expected and than other authors have shown for other stressors.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic variability in the tolerance of natural populations ofSimocephalus vetulus(Müller, 1776) to lethal levels of sodium chloride

Loureiro

Castro

Claro

et al. 2012

Ann. Limnol. - Int. J. Lim.

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“…Upon reproduction, neonates obtained from the third clutch were individually placed in glass containers with the same salinity value. This procedure was repeated for 3 generations and finally neonates (<24 h old) produced in the third generation in each salinity were used as test organisms in all experiments (Martínez-Jerónimo and Martínez-Jerónimo, 2007).…”

Section: Laboratory Conditionsmentioning

confidence: 99%

“…Cladocerans, one of the most abundant primary consumer groups, are a key component in lentic ecosystems. They display different physiological tolerances to several ionic compounds (Martínez-Jerónimo and Martínez-Jerónimo, 2007;El-Deeb Ghazy et al, 2009;Loureiro, 2012). The use of cladocerans in toxicity studies provides many advantages: easy handling, asexual reproduction by parthenogenesis, a short lifespan, and great sensitivity to toxic compounds (Martínez-Jerónimo and Martínez-Jerónimo, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of salinity tolerances on survival and life history of 2 cladocerans

Gökçe¹,

Turhan²

2014

Turk J Zool

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“…At present, experimentally obtained information exists on the negative effects of salinity on different population parameters of some species of both genera from other regions such as Daphnia magna [22,23,24], Daphnia carinata [25], Daphnia exilis [26], Moina hutchinsoni [27], Daphnia pulex, and Moina macrocopa [28]. However, in the case of the two Argentine species, although many aspects of their biology in natural conditions are known [8,9,29,30,31], at present, only acute bioassays have been performed to determine the tolerance of their neonates to salinity [32] or the effects of different concentrations of anions such as Cl -and SO 4 2- [33]; because these are the predominant anions in most of the lakes in which these species have been recorded [16].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Optimal Culture Medium and Salts for Bioassays with Neotropical Halophilic Cladocerans

Alicia¹,

Gabriela²,

Santiago³

2014

AJLS

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Abstract:The neotropical halophilic cladocerans Daphnia menucoensis and Moina eugeniae are common in shallow lakes of semi-arid central and northern Patagonia in Argentina. In the present study, we determined the tolerance of neonates of both species to salinity and different concentrations of Cl -and SO 4 2-. However, the responses differed according to the demineralized water or groundwater employed to dissolve the salts. On the other hand, survival was lower when using analytical grade reagents instead of natural salts. As bioassays should be developed to determine the chronic physiological responses of both species, the objectives of this study were to compare three culture media and test the hypothesis that natural salts dissolved in aquifer water is the optimal combination for breeding. Acute bioassays were conducted with neonates of both species. To compare the media, NaCl solutions (5, 10, 15, 20 and 25 g.L -1 ) were prepared using demineralized water, aquifer water and EPA medium. For the second objective, solutions of equal concentrations were prepared with salts obtained from the natural environment, previously sterilized, and dissolved in phreatic water. Survival was higher in the aquifer water, whose chemical composition was relatively more representative of the lakes inhabited by both species. It was almost complete at 20 and 15 g.L -1 for D. menucoensis and M. eugeniae, respectively. Lower survival of D. menucoensis was found in EPA medium, although it was developed for breeding other species of Daphnia. In the second series of bioassays, survival was almost complete until 20 g.L -1 (D. menucoensis) and 25 g.L -1 (M. eugeniae). The combination natural salts/aquifer water was adequate to assess the tolerance of both cladocerans. However, the former was more important, since the results were consistent with previous studies when these salts were dissolved in demineralized water. In addition, survival was much higher than when we used salts of analytical grade.

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Chronic effect of NaCl salinity on a freshwater strain of Daphnia magna Straus (Crustacea: Cladocera): A demographic study

Cited by 74 publications

References 16 publications

Genetic variability in the tolerance of natural populations ofSimocephalus vetulus(Müller, 1776) to lethal levels of sodium chloride

Genetic variability in the tolerance of natural populations ofSimocephalus vetulus(Müller, 1776) to lethal levels of sodium chloride

Effects of salinity tolerances on survival and life history of 2 cladocerans

Determination of the Optimal Culture Medium and Salts for Bioassays with Neotropical Halophilic Cladocerans

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