13. A synopsis of ecological information on the saline lake rotifer Brachionus plicatilis M�ller 1786

Walker, Keith F.

doi:10.1007/bf00048713

Cited by 60 publications

(10 citation statements)

References 24 publications

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“…The monogonont rotifer Brachionus plicatilis (Mü ller, 1786) has been shown to exhibit strong population divergence in neutral genetic markers in the Iberian Peninsula . Brachionus plicatilis inhabits salt lakes and coastal lagoons (Walker, 1981), highly seasonal and unpredictable habitats, and populations vary from very ephemeral to almost permanent in these habitats (Ortells et al, 2003;Lapesa, 2004). This species is a cyclical parthenogen combining asexual and sexual reproduction, whose life cycle begins when asexual females hatch from diapausing eggs in the sediment banks (Pourriot & Snell, 1983;Wallace & Snell, 1991).…”

Section: Introductionmentioning

confidence: 99%

Selection on life‐history traits and genetic population divergence in rotifers

Campillo

García‐Roger

Carmona

et al. 2009

J of Evolutionary Biology

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A combination of founder effects and local adaptation – the Monopolization hypothesis – has been proposed to reconcile the strong population differentiation of zooplankton dwelling in ponds and lakes and their high dispersal abilities. The role genetic drift plays in genetic differentiation of zooplankton is well documented, but the impact of natural selection has received less attention. Here, we compare differentiation in neutral genetic markers (FST) and in quantitative traits (QST) in six natural populations of the rotifer Brachionus plicatilis to assess the importance of natural selection in explaining genetic differentiation of life‐history traits. Five life‐history traits were measured in four temperature × salinity combinations in common‐garden experiments. Population differentiation for neutral genetic markers – 11 microsatellite loci – was very high (FST = 0.482). Differentiation in life‐history traits was higher in traits related to sexual reproduction than in those related to asexual reproduction. QST values for diapausing egg production (a trait related to sexual reproduction) were higher than their corresponding FST in some pairs of populations. Our results indicate the importance of divergent natural selection in these populations and suggest local adaptation to the unpredictability of B. plicatilis habitats.

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Section: Introductionmentioning

confidence: 99%

Selection on life‐history traits and genetic population divergence in rotifers

Campillo

García‐Roger

Carmona

et al. 2009

J of Evolutionary Biology

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“…The rotifer Brachionus plicatilis (Mü ller 1786) is considered as a worldwide inhabitant of brackish or saline lakes and ponds (Walker, 1981;Hammer, 1986). This taxon is a complex of a still undetermined number of closely related species (Gó mez, Temprano & Serra, 1995;Ortells et al, 2000;Gó mez et al, 2002;Suatoni, 2003).…”

Section: Introductionmentioning

confidence: 99%

Hatching and viability of rotifer diapausing eggs collected from pond sediments

2006

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1. Planktonic rotifers inhabiting variable environments produce diapausing eggs that accumulate in the sediment of lakes and ponds, forming egg banks that may withstand adverse periods. A common assumption in zooplankton diapausing egg bank studies is to count as viable all eggs in the sediment that look healthy. This assumption should be challenged by asking how effectively 'healthy-looking' eggs represent viable eggs. 2. In this study, viability of more than 1100 'healthy-looking' diapausing eggs belonging to the Brachionus plicatilis species complex was assessed in a laboratory hatching experiment. Eggs were collected at different depths from sediment cores obtained from 15 ponds located in coastal and inland areas of Eastern Spain. 3. Only approximately one half of the 'healthy-looking' diapausing eggs hatched after incubation in experimental conditions. Almost all the hatchlings (99.4%) survived to maturity. The proportion of 'healthy-looking' diapausing eggs that hatched varied among areas and among ponds within area, and substantially declined with sediment depth. Most of the hatchlings (88%) were obtained from the uppermost 2 cm of sediment. 'Healthylooking' eggs from upper sediment layers hatched after significantly shorter incubation times than eggs recovered from deeper layers. 4. Both decreased hatching success and increased incubation time for hatching with sediment depth suggest that older 'healthy-looking' eggs are less responsive to hatching stimuli and could become unviable. However, the strong correlation found between the number of 'healthy-looking' eggs and the number of hatchlings indicates that the abundance of 'healthy-looking' eggs is a good index of egg bank viability.

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“…The rotifer B. plicatilis tolerates salinities ranging from 1 to 97 ppt (Walker, 1981). Viayeh, et al, (2010) found that the maximum final population density of rotifer (B. urceolaris) strain fed on Nannochloropsis was at 20 ppt(brackish…”

Section: Initial Density Treatmentsmentioning

confidence: 99%

Biotic and Abiotic Factors Affecting Productive Performance of Rotifers (Brachionus Plicatilis) Population Produced Under 3 Days Batch Culture System

Omar

Essa

Srour

et al. 2014

Journal of the Advances in Agricultural Researches

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Rotifers Brachionus plicatilis are being used worldwide to feed early developmental stages of marine finfish and crustaceans. Further, rotifer transmits adequate supplies of micro and macro-nutrients, vitamins, probiotic, and even antibodies to fish larvae. Food type is regarded as the most important criterion that could affect growth and quality of rotifers. There fore, the present work was performed to study the effect of food type, salinity, water temperature, and initial stocking density on the population growth of rotifers. The first experiment was conducted to during the first phase of the present study investigate the effect of four different algal diets: (1) Nannochloropsis oculata life (N), (2) Spirulina platensis powder (S), (3) 50% N. oculata + 50% beaker yeast (NY), and (4) 50% S. platensis + 50% beaker yeast, on rotifer population (as final number/ml) and fatty acid profile of rotifer batch cultured (72 h) was employed. Rotifer culture treatments were conducted in jars (30 liters) with three replicates for each treatment.The results of the firts phase of the study clearly illustrated that NY diet possessed the highest population growth, Eicosapentaenoic acid (EPA), and Docosahexaenoic acid DHA percentage. Depending on the results of the first phase, the diet NY was candidate to investigate the effect of different salinities (25, 27, and 29 ppt), temperatures (26, 28, 30, 32 ºC), and initial rotifer stocking densities (50, 100, 150, and 200 Ind./ml) on rotifer population. The results showed that salinity 25 ppt, temperature 28ºC, and initial rotifer density 150 pcs/ml possessed the highest rotifer population growth during a 72-hrs batch culture system of rotifer when fed on 50% N. oculata + 50% beaker yeast (NY) food type.

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13. A synopsis of ecological information on the saline lake rotifer Brachionus plicatilis M�ller 1786

Cited by 60 publications

References 24 publications

Selection on life‐history traits and genetic population divergence in rotifers

Selection on life‐history traits and genetic population divergence in rotifers

Hatching and viability of rotifer diapausing eggs collected from pond sediments

Biotic and Abiotic Factors Affecting Productive Performance of Rotifers (Brachionus Plicatilis) Population Produced Under 3 Days Batch Culture System

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