Effects of salinity, temperature and food level on the demographic characteristics of the seawater rotifer Synchaeta littoralis Rousselet

Bosque, Teresa; Hernández, Raquel; Pérez, Ricardo Hernández; Todolí, Rafael; Oltra, Ricardo

doi:10.1016/s0022-0981(00)00345-2

Cited by 25 publications

(19 citation statements)

References 30 publications

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“…Based on our observations, it could also be concluded that Brachionus rotifers can better tolerate shifting to higher salinities than to lower ones, i.e., 5‰. For a different genus of rotifers, it was found that salinity has a marked negative effect on the rotifer average lifespan (OLTRA and TODOLI, 1997) and fecundity of females and intrinsic growth rate (BOSQUE et al, 2001).…”

Section: Discussionmentioning

confidence: 52%

“…The two studied algae may commonly be used in rotifer culture systems interchangeably. Salinity has been found to influence life time, the mode of reproduction and the growth rate of rotifers (BOSQUE et al, 2001;. Salinity of 5‰ was critical for all strains, and as a general trend, all the strains tended to grow at higher salinities.…”

Section: Discussionmentioning

confidence: 89%

“…Therefore, it is not surprising that both food type and salinity have significant influences on this parameter (XI et al, 2005). This is a practical variable which has been estimated as an indicator of rotifer population dynamics in several life table and demographic studies BOSQUE et al, 2001;SARMA and NANDINI, 2002;YIN and ZHAO, 2008), as well as for evaluation of production in rotifer mass culture systems (SUAN-TIKA et al, 2000, 2003. THEILACKER and MCMASTER (1971) used r value for predicting the doubling time of a rotifer population.…”

Section: Discussionmentioning

confidence: 99%

“…In the study of HOTOS (2003), feeding B. plicatilis by a higher density of C. vulgaris (2.5 × 10 6 cell mL ) has been reported by . BOSQUE et al (2001) provided a review of population growth rates of different rotifer species at different salinities.…”

Section: Discussionmentioning

confidence: 99%

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Population Growth of Six Iranian Brachionus Rotifer Strains in Response to Salinity and Food Type

Viayeh¹,

Mohammadi²,

Shafiei³

2010

International Review of Hydrobiology

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Intrinsic rates of population increase (r) were evaluated as a measure of population dynamics of four strains of Brachionus plicatilis and two strains of B. urceolaris from Iran in response to different salinities and feeding algae. Each rotifer strain was cultured at four salinities: 5, 20, 25 and 30‰ and fed with two microalgal species: Chlorella vulgaris and Nannochloropsis oculata. Salinity of 5‰ was critical for all the examined strains, at which r was at minimum and was different from the other salinities (P < 0.05). For B. plicatilis strains, the maximum r was observed in those fed on Chlorella at salinities of 10 and 30‰ (64 ± 0.01 day −1). While, in B. urceolaris, maximum r was for Nannochloropsis fed rotifers at salinity of 20‰ (0.69 ± 0.01 day −1). Maximum final population density (FD) was obtained for a strain of B. urceolaris fed on Nannochloropsis at 20‰ (329.3 ± 10.9 ind.mL −1). FD was relatively lower in B. plicatilis strains among all examined salinities. ANOVA showed the significant effect of salinity and rotifer strain, and algae × rotifer strain on both r and FD, and salinity × rotifer × algae on FD (P < 0.05). IntroductionRotifers are considered as ideal model organisms for various kinds of biological laboratory studies including population dynamics (YOSHINAGA et al., 1999;SARMA, 2006;SNELL and DESROSIERS, 2008). They have also become a valuable and, in many cases, indispensable food organism for first feeding of a large variety of cultured marine finfish and crustacean larvae (DOUILLET, 2000).Success in rotifer culture seems, to a great extent, to be dependent on providing adequate information on the life history characteristics and environmental preferences of each biotype. An increasing number of studies have been carried out on the effects of salinity, temperature and the type and concentration of food on the demographic traits and population growth of rotifers (CABRERA et al., 1993;OLTRA and TODOLI, 1997;FIELDER et al., 2000;SARMA and NANDINI, 2002;ATHIBAI and SANOAMUANG, 2008). These studies were accomplished using several rotifer species (XI et al., 2001;SUCHAR and CHIGBU, 2006;WULLUR et al., 2009

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Section: Discussionmentioning

confidence: 52%

Section: Discussionmentioning

confidence: 89%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Population Growth of Six Iranian Brachionus Rotifer Strains in Response to Salinity and Food Type

Viayeh¹,

Mohammadi²,

Shafiei³

2010

International Review of Hydrobiology

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“…However, strains of the same species with different geographic origins can have different biological characteristics and environmental requirements as a result of different genetic backgrounds (Yin & Zhao, 2008;Malekzadeh-Viayeh et al, 2010); thus, it is important to evaluate the potential for growth of the different native strains recently identified. For example, it has been found that salinity affects the lifetime, the reproduction mode and the growth rate of rotifers of the genus Brachionus (Bosque, Hernández, Pérez, Todolí, & Oltra, 2001;Hagiwara, Gallardo, Assavaaree, & Koyani., 2001;Kostopoulou, Miliou, Krontira, & Verriopoulus, 2007;Yin & Zhao, 2008). For P. similis, Wullur et al (2009) reported that in the salinity range of 2-30 psu and in serial cultures, the highest densities were recorded at salinities of 2 and 15 psu (500 and 360 rot mL -1 , respectively), while the lowest densities were recorded at salinities of 20-30 psu (<120 rot ml -1 ), suggesting that salinities of 2-15 psu are the best for the growth of P. similis (which coincides with the salinities of its original natural environment) under laboratory conditions, and that the lower growth recorded at salinities >25 psu was due to the increase in energy demand for osmoregulation and a decrease in the filtration rate.…”

Section: Discussionmentioning

confidence: 99%

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Reyes¹,

Monteon²,

Urreta³

et al. 2017

Turk. J. Fish. Aquat. Sci.

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The effect of different salinities on growth, crude protein and total energy on a Mexican strain of the minute rotifer Proales similis (GenBank KM078762) were evaluated. The experiment was conducted at 5, 15, 25 and 35 psu, with five replicates. Rotifers were fed twice a day with Nannochloropsis sp., temperature, dissolved oxygen and pH values were maintained at 25±1°C, 5±1 mg L -1 and 8±1 respectively. Results show that salinity does not affect the intrinsic rate of population growth (r=0.46 to 0.51 day -1 ) and duplication time (Dt=1.36 to 1.51 days) for P. similis. Maximum density (Dmax) values were lower at 35 psu (1,703 rotifers ml -1 ), whereas Dmax values were between 2,488 to 2,560 rotifers ml -1 at 5, 15 and 25 psu. Crude protein fluctuated between 25.3 and 42.8% dry biomass (DB), while energy content varied between 11.8 and 19.9 J mg -1 DB; values were significantly lower at 35 psu. Observed population growth parameters and the protein and energy content between 5-25 psu, indicate that P. similis can be successfully reared below 35 psu, making P. similis very suitable when fish larvae require a small rotifer due to sizing of mouth gap at the beginning of exogenous feeding.

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When males outlive females: Sex‐specific effects of temperature on lifespan in a cyclic parthenogen

Pietrzak

Grzesiuk

Dorosz

et al. 2018

Ecology and Evolution

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Lifespans of males and females frequently differ as a consequence of different life history strategies adopted to maximize fitness. It is well visible in cyclic parthenogens, such as water fleas of the genus Daphnia, where males appear in the population usually only for periods when receptive females are available. Moreover, even within one sex, different life history strategies and mechanisms regulating lifespan may exist. Previous studies suggested that Daphnia males may regulate their lifespan by staying in colder waters than females. We hypothesize that such behavioral mechanism should be associated with stronger reaction to low temperature–that is greater lifespan extension in males than in females. In this study, we monitored survivorship of Daphnia magna females and males of three clonal lines cultured at 16 or 20°C. The results did not provide a species‐level corroboration of our hypothesis; instead, they revealed very strong intraspecific differences in the responses of male and female lifespan to temperature change. They further suggest the existence of parallel life history strategies, hypothesis whose tests would bring new insights into the ecology of males in cyclic parthenogens.

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Effects of salinity, temperature and food level on the demographic characteristics of the seawater rotifer Synchaeta littoralis Rousselet

Cited by 25 publications

References 30 publications

Population Growth of Six Iranian Brachionus Rotifer Strains in Response to Salinity and Food Type

Population Growth of Six Iranian Brachionus Rotifer Strains in Response to Salinity and Food Type

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When males outlive females: Sex‐specific effects of temperature on lifespan in a cyclic parthenogen

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