Agar content of estuarine seaweed Gracilaria using different cultivation methods

Mendes, Madalena; Fortunato, Duarte; Cotas, João; Pacheco, Diana; Morais, Tiago; Pereira, Leonel

doi:10.1016/j.afres.2022.100209

Cited by 13 publications

(4 citation statements)

References 55 publications

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“…There is a possibility that growth in a controlled situation may not be favorable for carrageenan production. Thus, the type of cultivation may impact the polysaccharide yield, as demonstrated by Mendes et al [58] and Araujo et al [59], who demonstrated that the seaweed specie can change their polymer production due to the cultivation methods and this is not linear between species (using the same cultivation methods).…”

Section: Discussionmentioning

confidence: 99%

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Tanoeiro¹,

Fortunato

Cotas

et al. 2023

Applied Sciences

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With the notable scarcity of Chondrus crispus on the Portuguese coast, and interest in exploiting compounds such as carrageenan, this study focuses on investigating different aquaculture methods and recording the yield of carrageenan from specimens grown by different methods. We compare the growth of Chondrus crispus in aquaculture using Free Floating, Cages, Attempted Fixation on Rock, and Fixed Line similar to Long Line. The best method was Free Floating where Nursery 0 had a 24-day Specific Growth Rate (SGR) of 2.08 ± 0.47%/day. The worst method in terms of growth was Nursery 2 (Attempted Fixation on Rock) where the SGR at 28 days was 0.33 ± 0.69%/day, and no fixation was observed. In terms of carrageenan extraction, all culture methods gave rise to biomass that had a lower extraction yield than wild specimens, at 50.95 ± 4.10%. However, the Free-Floating method from Nursery 1 showed an acceptable carrageenan content (31.43 ± 7.00%). Therefore, we demonstrate that the concept of C. crispus cultivation may be key to promoting the sustainability and stability of this species.

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Section: Discussionmentioning

confidence: 99%

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Tanoeiro¹,

Fortunato

Cotas

et al. 2023

Applied Sciences

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“…Based on these criteria, it shows that the quality of pond water in South Sulawesi (Table 2) is classified as medium and high fertility. The agar content of seaweed Gracilaria sp seems to increase with decreasing P under a high N supply [61]. Seaweed can grow optimally with a PO 4 2range from 0.051 to 1.00 mg/L [62].…”

Section: Water Qualitymentioning

confidence: 95%

Identifying the Environmental Factors that Determine the Agar Content of Seaweed <i>Gracilaria verrucosa</i> in Acid Sulfate Soil-Affected Brackishwater Ponds

Mustafa,

Athirah,

Ratnawati

et al. 2024

Pol. J. Environ. Stud.

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This study was carried out with the aim to identify the characteristics and determine the direct or indirect effect of soil and water quality on the agar content of seaweed Gracilaria verrucosa in acid sulfate soil (ASS)-affected brackishwater ponds in South Sulawesi Province, Indonesia. The study was conducted in ponds of North Luwu and Sinjai Regencies. The soil quality is defined as the independent or exogenous variable; the water quality as an intermediate, dependent, or endogenous variable; as well as the agar content of seaweed as a dependent or endogenous variable. The influence of environmental factors was identified through path analysis applications. In general, the water quality can support the culture of seaweed in ponds. The results of the research showed that of the 17 soil quality variables analyzed, 2 variables were found, namely Fe content and pH KCl which influenced the agar content of seaweed. Another result was that of the 9 water quality variables, and 2 variables were also found, namely salinity and NO

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“…The bloom-forming Gracilaria is seen to be abundant in estuarine environments (Mendes et al 2022). This type of nuisance algae is widely distributed, and its growth is associated with agriculture and domestic waste locations (Joniver et al 2021).…”

Section: Epiphytic Gracilaria Molecular Identificationmentioning

confidence: 99%

“…The popular commercial generas Kappaphycus and Eucheuma are mainly cultivated as carrageenan sources, with a global market size valued at USD 871.66 million in 2022 (Das et al 2023;Zhang et al 2023). Although it is still less valued than carrageenan, the agar industry is steadily growing, with a global market size of USD 263.61 million in 2022 (Mendes et al 2022). However, in the seaweed industry, not only these phycocolloids (polysaccharides derived from seaweeds) are gaining significant attention.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia

PRASEDYA,

FITRIANI,

SARASWATI

et al. 2023

Biodiversitas

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Abstract. Prasedya ES, Fitriani F, Saraswati PBA, Haqiqi N, Qoriasmadillah W, Hikmaturrohmi H, Nurhidayati SZ, Ariati PEP. 2023. Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia. Biodiversitas 24: 5343-5351. The seaweed industry is strategically important in Indonesia, comprising over 40% of the nation's aquaculture annual production. Despite the industry's promising growth, various challenges and problems remain, including intense epiphyte infestation. Hence, investigating the economic value of these epiphytes could provide new opportunities for potential industrial applications. Epiphytic algae is commonly found growing on commercial seaweeds which causes decreased biomass and increased risk of crop failure. Information regarding these epiphytic algae remains limited. This study investigates the molecular identification of the abundant epiphytic macroalgae found in one of the largest seaweed farms in, Seriwe Bay, Lombok, Indonesia. In addition, the epiphytic bioactive activity is also evaluated for further industrial potential. Molecular identification with the mitochondrial marker COX1 identifies the epiphytic macroalgae as Gracilaria edulis (S.G.Gmel.) P.C.Silva. The Indonesian G. edulis is closely related to the G. edulis specimens from Malaysia (JQ026083.1), Philippines (KY995636.1 and KY995635.1), and Thailand (JQ026088.1). The outgroup used was the G. edulis specimen from India (KP099563.1) because it shows the most distinct relationship to the other specimens. Extracted agar of Seriwe G. edulis shows moderate yield (21%) and low gel strength (134 g/cm2). The phytochemical content analyses show that G. edulis agar has a TPC value of 3.65 ± 0.52 mg GAE/g and promising antioxidant activity (DPPH IC50 = 797.40 ± 1.50 µg/mL; ABTS IC50 = 558.40 ± 1.44 µg/mL). Further phytochemical profiling with GCMS shows various promising major constituents such as tetradecanoic acid, neophyte diene, pentadecanoic acid, and hexadecanoic acid. Therefore, the findings suggest that G. edulis displays potential applications in the functional food and cosmetic industry.

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Agar content of estuarine seaweed Gracilaria using different cultivation methods

Cited by 13 publications

References 55 publications

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Different Chondrus crispus Aquaculture Methods and Carrageenan Extraction

Identifying the Environmental Factors that Determine the Agar Content of Seaweed <i>Gracilaria verrucosa</i> in Acid Sulfate Soil-Affected Brackishwater Ponds

Evaluation of bioprospecting potential of epiphytic Gracilaria edulis harvested from seaweed farm in Seriwe Bay, Lombok, Indonesia

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