An investigation into the mass production of the freshwater rotifer Brachionus calyciflorus Pallas. 2. Influence of temperature on the population dynamics

Awaïss, Aboubacar; Kestemont, Patrick

doi:10.1016/0044-8486(92)90097-5

Cited by 14 publications

(7 citation statements)

References 8 publications

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“…However, the rotifer strain used in the present study survived and reproduced well at these two temperatures. The optimal temperature for a high population density and growth rate in the present study was 27ºC, in agreement with previous studies that reported the optimal temperature for population growth of B. calyciflorus was around 25-29ºC (Awaïss & Kestemont, 1992;Park et al, 2001;Anitha et al, 2016). At high temperatures, the rapid increase in population growth can compromise water quality and inhibit further growth of the population (Ogello et al, 2016).…”

Section: Population Growthsupporting

confidence: 93%

“…This may be also the reason for the rapid decreases in the population densities of the higher temperature groups at the later culture stages in the present study. An increase in the population growth rate as the water temperature increased was observed due to the shorter time required for the embryo and post-embryo to develop at a higher temperature (Awaïss & Kestemont, 1992). At high temperatures, the metabolic activities of rotifer are high, the lifespan shortens, and the number of rotifer eggs and juveniles released per day increases due to the reduction in the interval between each egg-laying (Awaïss & Kestemont, 1992;Yona, 2018).…”

Section: Population Growthmentioning

confidence: 99%

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Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)

Nhinh

Hong

Hoai

et al. 2020

vjas

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Resting egg production of rotifers provides critical advantages in larviculture of most fish species due to the reduction in the costs of labour and algae production. The study was conducted to investigate the effects of temperature on population growth and resting egg production of a freshwater rotifer, Brachionus calyciflorus, collected in Northern Vietnam. The rotifer was pre-cultured at 27ºC before being transferred to the cultures at 15 and 35ºC while the control was maintained at 27ºC. One-liter beakers filled with 500mL culture medium were used with three replicates for each temperature group. Stock rotifers were inoculated at an initial density of 200 ind ml-1 and fed with concentrated fresh algae. The results indicated that population growth rate (r) of rotifers cultured at 27 and 35ºC were significantly higher than that of rotifers at 15ºC while the highest density was attained from the treatment of 27ºC, at 608.3 ind mL-1, compared to 468.3 and 360.5 ind mL-1 at 35 and 15ºC, respectively. Transferring the cultures from 27 to 35ºC significantly increased the rate of resting egg carrying females with the maximum rate of 31.5% compared to 21.2 and 13.5% of the rotifers at 27 and 15ºC, respectively. The resting egg densities of the cultures at 35ºC were also significantly higher than those at 15 and 27ºC. The resting egg carrying females appeared and increased their rates in concurrence with increases in the population density. The present results are important information for resting egg induction and production of rotifer in larviculture.

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Section: Population Growthsupporting

confidence: 93%

Section: Population Growthmentioning

confidence: 99%

Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)

Nhinh

Hong

Hoai

et al. 2020

vjas

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“…As such, it reflects changes in the time required to reach sexual maturity and the developmental time. This was demonstrated by most of the tested rotifer species and rotifer strains, whose sexual maturation time, embryonic developmental time and generation time all decreased with increase in temperature (Walz 1983(Walz 1987Galkovskaja 1987;Huang 1989;Awaiss and Kestemont 1992;P erez-Legaspi and Rico-Martínez 1998;Xi and Huang 2000;Dong et al 2004;Tao et al 2008). In the present study, decreased generation time of B. calyciflorus with increasing temperature was also the general trend.…”

Section: Discussionmentioning

confidence: 82%

Differences in life table demography among eight geographic populations of Brachionus calyciflorus (Rotifera) from China

Ma¹,

Xi²,

Zhang³

et al. 2010

Limnologica

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Age-specific survivorship and fecundity Life expectancy at hatching Generation time Net reproductive rate Intrinsic rate of population increase Proportion of sexual offspring Ecological differentiation a b s t r a c t Eight geographic populations of Brachionus calyciflorus collected from China in August 2007 were cultured at 18 1C, 23 1C and 28 1C with 3.0 Â 10 6 cells mL À1 of alga Scenedesmus obliquus to investigate their differences in life table demography. The results showed that the response in each of the life table demographic parameters (age-specific survivorship and fecundity, life expectancy at hatching, generation time, net reproductive rate, intrinsic rate of population increase and proportion of sexual offspring) to increasing temperature differed with geographic population. Life expectancy at hatching, generation time, net reproductive rate and intrinsic rate of population increase were all significantly influenced by temperature, geographic population and their interaction and indirectly affected by the changes in body size and egg volume of the rotifers; however, the proportion of sexual offspring produced by the rotifers was markedly influenced only by geographic population. Among all the combinations of temperature and geographic population, the generation times of Guangzhou and Hainan populations at 18 1C were the longest, and the intrinsic rate of population increase of the Tai'an population at 18 1C was the lowest. Among all the eight geographic populations, the proportion of sexual offspring produced by Xuzhou population was the highest. Although the higher proportions of sexual offspring produced by all the geographic populations of rotifers (9.7-41.1%) might lead to higher resting egg productions, and thus to wide spread of the rotifers among the eight geographic populations, their differences in life table demography might be regarded as the results of adaptation to the different environmental conditions faced by them in the field.

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“…It has been widely used to investigate the demographic characteristics of populations in rotifers (Rao & Sarma, 1986;Sarma, Nandini, & Flores, 2001). Previous studies have shown that some factors are most likely to influence the rotifer life table parameters, such as food quality (Korstad, Olsen, & Vadstein, 1989;Snell & Hawkinson, 1983;Xi & Huang, 1999), food quantity (Roberston & Salt, 1981;Xi & Huang, 1999), temperature (Awaı¨ss & Kestemont, 1992;Snell, 1986;Xi & Huang, 2000a), and salinity of culture medium (Snell, 1986 Rotifers are also excellent food resources to larval fish and crustaceans. In initiating mass cultivation of rotifers, their reproductive rates at the available environmental conditions should be carefully considered (Lubzens, Tandler, & Minkoff, 1989).…”

Section: Introductionmentioning

confidence: 98%

Demographic parameters and mixis of three Brachionus angularis Gosse (Rotatoria) strains fed on different algae

2008

Limnologica

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Rotifers are one of the smallest metazoans, served as perfect material for evolution theories and excellent food resources to larva in aquaculture. Population dynamics of rotifers help to optimize culture conditions, and to understand selection of asexual and sexual reproduction types. We described population dynamics of three Brachionus angularis strains using the life table method, with three types of food. The following demographic parameters were analyzed: intrinsic rate of increase (r), net reproductive rate (R 0 ), generation time (T), average lifespan (L), and the total percentage of mictic females in the offspring. The results showed that there were significant effects of strain on the parameters except for R 0 . However, the food type significantly affected r, R 0 , T, and the total percentage of mictic females in the offspring. Demographic parameters differed among strains, showing the possible adaptation to local niches. In comparison to Chlorella pyrenoidosa, Scenedesmus obliquus served more nutrition to enlarge population size, and more mixis was induced in rotifer populations fed on it.

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An investigation into the mass production of the freshwater rotifer Brachionus calyciflorus Pallas. 2. Influence of temperature on the population dynamics

Cited by 14 publications

References 8 publications

Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)

Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)Effects of Temperature on Population Growth and Resting Egg Production of Freshwater Rotifer (Brachionus calyciflorus)

Differences in life table demography among eight geographic populations of Brachionus calyciflorus (Rotifera) from China

Demographic parameters and mixis of three Brachionus angularis Gosse (Rotatoria) strains fed on different algae

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