Effects of Fouling Management and Net Coating Strategies on Reared Gilthead Sea Bream Juveniles

Comas, Jordi; Parra, David; Balasch, Juan; Tort, Lluís

doi:10.3390/ani11030734

Cited by 9 publications

(2 citation statements)

References 35 publications

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“…High-pressure washing machines are used to remove fouling from the culture systems. They consume a large amount of water (Comas et al, 2021), producing a large quantity of sludge that needs to be managed as industrial waste (Bannister et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Solar drying of sludge of biofouling washing coming from the aquaculture industry.

Poblete,

Valencia-Ceballo,

Cortes

et al. 2023

JER

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The sludge produced in the aquaculture industry has an amount of moisture traditionally dried using the open sun drying method, which results in problems such as rewetting during rainfall events, the arrival of vectors and pollution. It is the first research where has been studied the use of a solar air heater with fins of different heights, a single and double-pass solar air heater and different thermal storage materials to enhance the efficiency of a solar dryer for drying sludge coming from the culture of Argopecten purpuratus, as a sustainable energy strategy. When using higher fins, the solar air heater requires less solar energy. With 8 cm high fins, the sludge got a constant mass when 58,567 kJ of solar energy was received in the dryer. When the height of the fins was 6, 4, and 0, a complete dried sludge was obtained with 71,394; 71,255; and 92,523 kJ of accumulative solar energy, respectively. Fin size variations result in significant differences in the drying process. The highest performance of the solar air heater was obtained with the run involving 8 cm high fins, and the performance decreased as the fins got smaller. The performance results were 6.7%, 11.0%, 21.2% and 27.9% for heights of 0, 4, 6 and 8 cm, respectively. In the evaluation of single and double pass in the solar air heater, the first one gets at the exit of the device 3.48 °C above environmental temperature, with an average thermal efficiency of 8.51% and the double pass SAH get an output temperature of 5.22 °C above the environmental temperature, and an average thermal efficiency was 16.53%. Also, different materials were evaluated as thermal storage, obtaining thermal efficiencies for heat storage were 0.88 for sand in aluminium cans, 0.49 for pebbles and 0.48 for rocks. Using these materials in a thermal storage system maintains the output temperature above the input temperature when there is low or null solar radiation. The thermal storage system permits a higher moisture reduction ever after before the sunshine, promoting a dry in the non-sunny hours.

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Section: Introductionmentioning

confidence: 99%

Solar drying of sludge of biofouling washing coming from the aquaculture industry.

Poblete,

Valencia-Ceballo,

Cortes

et al. 2023

JER

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“…The current situation is the main focus of efforts to stop climate change and global warming 15,16,50) , so reducing emissions on HSMVs is a challenge. Several methods to reduce emissions on board include 9,51) : optimization of hull shape [52][53][54][55] , weather routing 56,57) , maintaining a clean hull from biofouling [58][59][60][61][62][63][64][65][66][67] use of more environmentally friendly fuels [68][69][70][71][72] , optimization of propellers 73,74) , using additional environmentally friendly energy resources 75) .…”

Section: Introductionmentioning

confidence: 99%

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Muhammad Luqman Hakim,

Purnamasari,

Muryadin

et al. 2023

Evergreen

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Indonesia is an archipelago made up of a large number of islands, many of which are small and isolated. For effective connection of the islands, it is crucial to have efficient and welldesigned marine transportation systems. High-speed marine vehicles (HSMVs) are suitable for this purpose due to their compact size and speed. As the country continues to grow, the demand for HSMVs is increasing. However, to address the issue of climate change, these vehicles must have technological advancements that increase their energy efficiency. One way to achieve this is through trim control, a technique that can reduce the ship's resistance and improve energy efficiency. Studies have shown that if the trim control is properly configured, it can reduce the effects of ship drag and porpoising. However, the speed parameter, hull characteristics, and return moment capacity of the trim control must be properly configured. Because if the design is incorrect, resistance actually rises in comparison to not employing trim control.

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Sea transfer and net pen cleaning induce changes in stress-related gene expression in commercial Atlantic salmon (Salmo salar) gill tissue

Tveten

2023

Aquacult Int

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Stress is a major concern in aquaculture production and more knowledge is needed on physiological responses towards different operational events. Few studies have been performed on fish reared in an actual commercial setting. Transferring salmon from hatchery to sea involves handling, crowding, pumping, transport as well as adjusting to a new environment. This case study investigates the relative expression of selected stress related-genes in farmed Atlantic salmon (Salmo salar) post-smolts that were relocated from land-based breeding tanks with few environmental stressors to sea phase with numerous environmental stressors and major management operations e.g. net pen cleaning. Gill tissue for analysis (n = 60) was harvested at four distinct time points: before, during, and 3 and 6 weeks after sea transfer. RT-qPCR was performed on a panel of 12 genes involved in different cellular pathways (alox5, cyp1α, hif1α, il4/13a, muc2, muc5, muc18, nrf2, pcna, phb, p38 and tnfα). While the transport process itself did not appear to induce notable stress levels, metabolic gene markers showed significant changes in expression after transfer to sea, implying cellular adaptations to sea phase. The occurrence of net pen cleaning induced a strong upregulation of pro-inflammatory markers (alox5, tnfα) and mucins (muc2, muc5 and muc18), suggesting their gene products to be relevant during this operational event. As p38 expression was significantly elevated during transport and after cage cleaning, we cautiously propose p38 as an interesting stress marker for future exploration. The study provides insight into the lives of farmed Atlantic salmon and demonstrates that timing of major operations is crucial to avoid accumulation of stress.

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Effects of Fouling Management and Net Coating Strategies on Reared Gilthead Sea Bream Juveniles

Cited by 9 publications

References 35 publications

Solar drying of sludge of biofouling washing coming from the aquaculture industry.

Solar drying of sludge of biofouling washing coming from the aquaculture industry.

Using trim Control to Improve energy Efficiency on High-Speed Marine Vehicles (HSMV): A Review

Sea transfer and net pen cleaning induce changes in stress-related gene expression in commercial Atlantic salmon (Salmo salar) gill tissue

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