Effects of sub-lethal CO2(aq) concentrations on the performance of intensively reared gilthead seabream (Sparus aurata) in brackish water: Flow-through experiments and full-scale RAS results

Ben-Asher, Raz; Seginer, Ido; Mozes, Noam; Nir, Oded; Lahav, Ori

doi:10.1016/j.aquaeng.2013.04.002

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…The OPEFB process with a subcritical reactor aims to destroy lignin because the lignin component in OPEFB can inhibit the sugar production from cellulose and hemicellulose. In the enzymatic hydrolysis process, the destruction of the lignin structure, cellulose, and hemicellulose contained in lignocellulose will be more easily accessible by enzymes so that the hydrolysis process will run more easily and a larger reducing sugar will be produced [19]. However, in this paper, the subcritical water process was focused on sugar production.…”

Section: Subcritical Water Of Opefbmentioning

confidence: 99%

Impact of surfactant-aided subcritical water pretreatment process conditions on the reducing sugar production from oil palm empty fruit bunch

Rachmah

Fatmawati

Widjaja

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Oil palm empty fruit bunch (OPEFB), waste produced from the palm oil mills, has not been intensely utilized while its abundant availability in tropical countries such as Indonesia. It is one of the potential lignocellulosic material sources which can be utilized to produce sugar. The subcritical water process has been known as a promising lignocellulose-to-sugar conversion process. This study examined the effects of temperature, surfactant types, and concentrations on the sugar yield from OPEFB through the subcritical water process. In this research, the subcritical water process was conducted at a varied temperature of 140-180 °C, constant pressure and time of 60 bar, and 60 minutes, respectively. The types of surfactants studied were non-ionic, anionic, and cationic (Tween 80, SDS, and CTAB). Reducing sugar concentration analyses and solid characterizations using SEM, XRD, FTIR, and TGA were carried out in this research to evaluate the impact of the subcritical water process variables. The experiments showed that Tween 80 addition to the subcritical water process produced significant sugar yields at temperature 140 °C. The addition of CTAB to the subcritical water process shows adverse effects, while that of SDS showed support in the sugar production yields. This may be caused by hydrophobic and hydrophilic interactions between functional groups of the lignin unit and the hydrophobic and ionic groups of the surfactants. The subcritical water process run at a temperature of 180 °C assisted by SDS is the best scenario to produce the highest reducing sugar yield of 4.034%.

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Section: Subcritical Water Of Opefbmentioning

confidence: 99%

Impact of surfactant-aided subcritical water pretreatment process conditions on the reducing sugar production from oil palm empty fruit bunch

Rachmah

Fatmawati

Widjaja

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…These interactions are related to the quality and cost of the final product (market size and brood stock specimens), as well as the achievement of the highest possible level of welfare of gilthead seabream farmed populations, trying to satisfy their living ethology demands. Thus, in addition to rearing water chemical (oxygen, pH, etc., levels), physical (temperature, lighting) and hydrological factors, the importance of the response abilities of gilthead seabream to visual and auditory stimuli has been gradually recognized, especially during the last two decades (Batzina and Karakatsouli 2012;Batzina 220 Fish Physiol Biochem (2015) 41:219-232 et al 2014Ben Asher et al 2013;Calduch-Giner et al 2013;Karakatsouli et al 2006Karakatsouli et al , 2007Mylonas et al 2011;Papandroulakis et al 2002). Also, as useful data for the present study, have to be added that according to its currently known sound detecting anatomical tissues, gilthead seabream has been traditionally considered as a hearing generalist species, able to detect at higher intensities sounds of up to 1 kHz.…”

Section: Introductionmentioning

confidence: 99%

Gilthead seabream (Sparus aurata) response to three music stimuli (Mozart—“Eine Kleine Nachtmusik,” Anonymous—“Romanza,” Bach—“Violin Concerto No. 1”) and white noise under recirculating water conditions

Papoutsoglou

Karakatsouli

Psarrou

et al. 2014

Fish Physiol Biochem

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This study presents the results of the response of Sparus aurata to three different musical stimuli, derived from the transmission (4 h per day, 5 days per week) of particular music pieces by Mozart, Romanza and Bach (140 dB(rms) re 1 μPa), compared to the same transmission level of white noise, while the underwater ambient noise in all the experimental tanks was 121 dB(rms) re 1 μPa. Using recirculating sea water facilities, 10 groups, 2 for each treatment, of 20 specimens of 11.2 ± 0.02 g (S.E.), were reared for 94 days, under 150 ± 10 l× 12L-12D, and were fed an artificial diet three times per day. Fish body weight showed significant differences after 55 days, while its maximum level was observed after the 69th day until the end of the experiment, the highest value demonstrated in Mozart (M) groups, followed by those of Romanza (R), Bach (B), control (C) and white noise (WN). SGR (M = B), %WG (M = B) and FCR (all groups fed same % b.w.) were also improved for M group. Brain neurotransmitters results exhibited significant differences in DA-dopamine, (M > B), 5HIAA (C > B), 5HIAA:5HT (WN > R), DOPAC (M > B), DOPAC:DA and (DOPAC + HVA):DA, (C > M), while no significant differences were observed in 5HT, NA, HVA and HVA:DA. No differences were observed in biometric measurements, protease activity, % fatty acids of fillet, visceral fat and liver, while differences were observed regarding carbohydrase activity and the amount (mg/g w.w.) of some fatty acids in liver, fillet and visceral fat. In conclusion, present results confirm those reported for S. aurata, concerning the observed relaxing influence--due to its brain neurotransmitters action--of the transmission of Mozart music (compared to R and B), which resulted in the achievement of maximum growth rate, body weight and improved FCR. This conclusion definitely supports the musical "understanding" and sensitivity of S. aurata to music stimuli as well as suggesting a specific effect of white noise.

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“…Prolonged exposure of farmed fish to elevated CO 2 leads to hypercarbia and respiratory acidosis, reducing feed intake and growth (Fivelstad et al . 2007) and fertility (Ben-Asher et al . 2013), and causing renal calcium deposition (Fivelstad et al .…”

Section: Introductionmentioning

confidence: 99%

Elevated CO2 reduces juvenile Scophthalmus maximus growth and liver function in a recirculating aquaculture system

Xu¹,

Yu²,

Liu³

et al. 2022

Preprint

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Elevated CO2 negatively affects marine fish. In a recirculating aquaculture systems, we exposed juvenile Scophthalmus maximus, a CO2¬-sensitive, high-value species , to CO2 at 0 mg/L (control), or at 8, 16, 24, or 32 mg/L, for 7, 14, 30, or 60 d. Cumulative survival decreased significantly with increasing CO2 , to 68% at 32 mg/L. Weight gain, specific growth rate, and feed conversion rate differed significantly between the control and maximum concentration. CO2 caused histopathological damage. Plasma glutamate pyruvate transaminase and glutamate oxalate transaminase were significantly and substantially elevated at 24 and 32 mg/L CO¬2, relative to the control. At 32 mg/L, hemoglobin was significantly reduced, and methemoglobin significantly elevated , indicating reduced oxygen-carrying capacity. GHR, IGF-1, IGF-1R, and THR expression were substantially lower at 32 mg/L than in the control. For Scophthalmus maximus , these findings indicate that elevated CO2 retards growth, impairs health, and causes metabolic disorders, possibly by impairing liver function.

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Effects of sub-lethal CO2(aq) concentrations on the performance of intensively reared gilthead seabream (Sparus aurata) in brackish water: Flow-through experiments and full-scale RAS results

Cited by 13 publications

References 26 publications

Impact of surfactant-aided subcritical water pretreatment process conditions on the reducing sugar production from oil palm empty fruit bunch

Impact of surfactant-aided subcritical water pretreatment process conditions on the reducing sugar production from oil palm empty fruit bunch

Gilthead seabream (Sparus aurata) response to three music stimuli (Mozart—“Eine Kleine Nachtmusik,” Anonymous—“Romanza,” Bach—“Violin Concerto No. 1”) and white noise under recirculating water conditions

Elevated CO2 reduces juvenile Scophthalmus maximus growth and liver function in a recirculating aquaculture system

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