Factors Affecting Swimming Speed in the Rotifer Brachionus plicatilis

Yúfera, Manuel; Pascual, E.; Olivares, Jérôme

doi:10.1007/s10750-005-4279-y

Cited by 19 publications

(4 citation statements)

References 24 publications

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“…There was an increase in all morphometric variables from the pre‐reproductive to the reproductive phase in both treatments. The maximum increase in lorica length ( A ) from neonate to full size (ovigerous female with multiple eggs) was 70–80% and within the range of previously reported values (Yúfera 1982; Snell & Carillo 1984; Korstad et al 1989; Yúfera, Pascual & Olivares 2005). Within the reproductive phase, the presence and number of eggs positively influenced rotifer size.…”

Section: Discussionsupporting

confidence: 87%

Morphometric changes in a strain of the lineage ‘Nevada’, belonging to theBrachionus plicatilis(Rotifera) complex

Kostopoulou

Miliou

Verriopoulos

2009

Aquaculture Research

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The rotifer Brachionus plicatilis is an important component of aquaculture as a larval feed. Its taxonomic status has been recently re‐defined as a species complex, consisting of at least 14 new species/lineages. This study deals with the lineage Brachionus‘Nevada’, which has been shown to occur in European hatcheries. A strain of B. ‘Nevada’ was mass cultured using two commonly applied feeding regimes and analysed in terms of its morphometry. A new formula was proposed for the calculation of volume, which can be used as an index of adequacy of rotifers as feed for fish larvae. The results were related to life cycle parameters. The pre‐reproductive and reproductive phases were divided into distinct size groups. Differences were also found between the two diets in morphometry and demography. Rotifers of a larger size (yeast‐based diet) showed a lower growth rate and a longer reproductive period, lifespan and mean generation time compared with smaller‐sized rotifers (Culture Selco®‐based diet). In terms of lorica length, the present study's strain of B. ‘Nevada’ (238.5 μm) was intermediate between values reported for Brachionus ibericus (193.5 μm) and B. plicatilis sensu stricto (299 μm).

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Section: Discussionsupporting

confidence: 87%

Morphometric changes in a strain of the lineage ‘Nevada’, belonging to theBrachionus plicatilis(Rotifera) complex

Kostopoulou

Miliou

Verriopoulos

2009

Aquaculture Research

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“…Some of the residual variation may be attributable to different individuals' body length or size, which are known to influence swimming speed in Brachionus spp. (Epp & Lewis ; Yufera, Pascual & Olivares ).…”

Section: Resultsmentioning

confidence: 99%

Density‐ and resource‐dependent movement characteristics in a rotifer

2013

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Summary1. Theory predicts that consumers can increase their energy intake by spending more time within resource-rich areas and/or by avoiding areas where local competitor densities are high. A consumer whose movements are described by a simple random walk can achieve these objectives by adjusting its turn frequency and/or speed. 2. We recorded movements, as series of steps, by 180 individual rotifers (Brachionus calyciflorus) in glass capillary tubes to test the influence of resource density, competitor density and their statistical interaction on movement parameters. Four treatments contrasted opposing levels of algae (resource) and conspecific density in a 2 9 2 factorial design. 3. Our results indicate that density-and resource-dependent behaviours act through different mechanisms to shape patterns of rotifer movement. Turn frequency increased up to twofold in resource-rich treatments, depending on the presence or absence of competitors. In contrast, swimming speed was 50% greater in the presence of competitors under all treatments, but was only slightly depressed by the presence of resources alone. 4. We show how these two different movement mechanisms may be integrated into predictions of consumer population spread as resource and competitor densities vary. We discuss implications of the contrasting and complementary nature of these different movement mechanisms and their possible adaptations to different environmental stimuli.

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“…Other physiological factors, such as sex, age, size and satiation state have also been shown to affect the rotifer swimming velocity and path geometry (Bartumeus et al, 2003;Gilbert, 2016;Nilsson et al, 2017;Yúfera et al, 2005). Rotifers with high swimming velocity attributes are likely to increase their chances of mate encounters for sexual reproduction.…”

Section: Introductionmentioning

confidence: 99%

“…The swimming behaviour of rotifer is influenced by water temperature, light intensity, food quality and availability as well as predator cues (Han, Kim, Lee, et al., 2022; Kim et al., 2019; Xiang et al., 2017). Other physiological factors, such as sex, age, size and satiation state have also been shown to affect the rotifer swimming velocity and path geometry (Bartumeus et al., 2003; Gilbert, 2016; Nilsson et al., 2017; Yúfera et al., 2005). Rotifers with high swimming velocity attributes are likely to increase their chances of mate encounters for sexual reproduction.…”

Section: Introductionmentioning

confidence: 99%

Locomotory behaviour of euryhaline rotifer Brachionus rotundiformis: The potential influence of probiotics on swimming pattern and speed

Kagali,

Sakakura,

Hagiwara

2023

Aquaculture Fish & Fisheries

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We evaluated the effect of probiotics on the growth and culture condition of rotifer in medium‐sized culture tanks. The influence of probiotics on the changes in swimming patterns, velocity and sinuosity indices of rotifer was also examined. The rotifers (Brachionus rotundiformis) were cultured for 14 days in nine polycarbonate tanks containing seawater which were divided into three groups: a control group (Chlorella product) and two treatment groups: Chlorella + Probiotic I and Chlorella + Probiotic II. The rotifer population and the water quality parameters were monitored daily. To evaluate the locomotory behaviour of the rotifer, a sub‐sample containing rotifers was obtained from each treatment and placed on a glass‐bottomed dish. A high‐speed camera mounted on a stereo microscope was used to record the rotifer movement. The footage was then analysed using motion analysis software to establish the swimming velocity, swimming pattern and sinuosity indices of the rotifers. Co‐feeding rotifer on microalgae and probiotics resulted in a higher rotifer growth rate (0.51 ± 0.03) and decreased concentration of unionized ammonia (0.14 ± 0.02 mg L−1). In addition, the probiotic‐fed rotifers had 1.59 times higher average swimming velocity (0.97 ± 0.11 mm s−1) and more straight swimming pattern compared to rotifers that fed on microalgae alone whose velocity was slow (0.61 ± 0.14 mm s−1) and more sinuous. From these data, we can postulate that probiotics have the potential to attenuate rotifer culture conditions by decreasing ammonia concentration as well as influence rotifer swimming behaviour which could affect rotifer reproduction and the quality of fish larvae in aquaculture systems.

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Factors Affecting Swimming Speed in the Rotifer Brachionus plicatilis

Cited by 19 publications

References 24 publications

Morphometric changes in a strain of the lineage ‘Nevada’, belonging to theBrachionus plicatilis(Rotifera) complex

Morphometric changes in a strain of the lineage ‘Nevada’, belonging to theBrachionus plicatilis(Rotifera) complex

Density‐ and resource‐dependent movement characteristics in a rotifer

Locomotory behaviour of euryhaline rotifer Brachionus rotundiformis: The potential influence of probiotics on swimming pattern and speed

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