Cultivation of Gracilaria dura in the open sea along the southeast coast of India

Veeragurunathan, V.; Eswaran, K.; Malarvizhi, J.; Gobalakrishnan, M.

doi:10.1007/s10811-014-0514-0

Cited by 30 publications

(17 citation statements)

References 38 publications

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“…Interestingly, higher chlorophyll-a and phycobilin content in heavily fouled stock suggests that some seaweeds can acclimatise to low-irradiance conditions (Borlongan et al 2016). Furthermore, opportunistic benthic algae growing on cultured seaweed and farm infrastructure, such as cultivation ropes, raceways and rafts, directly compete with cultured seaweed for substratum, space, and dissolved nutrients, such as ammonia, nitrogen and inorganic carbon (Buschmann and G omez 1993;Fletcher 1995;Veeragurunathan et al 2015).…”

Section: Competition For Light Space and Dissolved Nutrientsmentioning

confidence: 99%

Biofouling in marine aquaculture: a review of recent research and developments

et al. 2019

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Biofouling in marine aquaculture is one of the main barriers to efficient and sustainable production. Owing to the growth of aquaculture globally, it is pertinent to update previous reviews to inform management and guide future research. Here, the authors highlight recent research and developments on the impacts, prevention and control of biofouling in shellfish, finfish and seaweed aquaculture, and the significant gaps that still exist in aquaculturalists' capacity to manage it. Antifouling methods are being explored and developed; these are centred on harnessing naturally occurring antifouling properties, culturing fouling-resistant genotypes, and improving farming strategies by adopting more sensitive and informative monitoring and modelling capabilities together with novel cleaning equipment. While no simple, quick-fix solutions to biofouling management in existing aquaculture industry situations have been developed, the expectation is that effective methods are likely to evolve as aquaculture develops into emerging culture scenarios, which will undoubtedly influence the path for future solutions. ARTICLE HISTORY

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Section: Competition For Light Space and Dissolved Nutrientsmentioning

confidence: 99%

Biofouling in marine aquaculture: a review of recent research and developments

et al. 2019

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“…The maximum DGR from the raft culture data of both species in the present study in the range of 5.38-5.82 % day −1 was higher than other reports of raft cultivation of G. dura of 3.17 % day −1 (Veeragurunathan et al 2015b) and 4.67 % day −1 (Mantri et al 2009). Among the physicochemical parameters, phosphate content of the seawater positively influenced the growth parameters in G. debilis and G. edulis, whereas the opposite trend was observed in G. dura (Veeragurunathan et al 2015a) at the same cultivation site. Silva et al (1987) reported that production of Gracilaria biomass was influenced by phosphate level.…”

Section: Discussionmentioning

confidence: 88%

“…0 1 ± 0 . 6 8 k g f r e s h w t m − 2 ) (Veeragurunathan et al 2015a) and G. edulis (4.4 ± 0.4 kg fresh wt m −2 ) (Ganesan et al 2011). The higher initial biomass used may be the reason for higher biomass yield obtained in Melting temperature and sulfate content of agar of different strain G and R variants of G. debilis and G. edulis during three harvest periods (n = 3).…”

Section: Discussionmentioning

confidence: 99%

“…DGR (% day −1 ) was calculated by the formula DGR (% day −1 ) = (ln (W f / W 0 ) / t) × 100, where W f is the final weight after the t days of culture and W 0 is the initial fresh weight (Mantri et al 2009). Biomass yield is expressed as mean kilograms fresh weight per square meter and calculated by the formula Y = (final wt − initial wt/m 2 ) (Veeragurunathan et al 2015a). …”

Section: Experimental Design Of Raft Cultivation Of G Edulis and G mentioning

confidence: 99%

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Growth and biochemical characterization of green and red strains of the tropical agarophytes Gracilaria debilis and Gracilaria edulis (Gracilariaceae, Rhodophyta)

et al. 2016

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Cultivation of the wild-type red strain and green natural mutant strains of Gracilaria debilis (Forsskål) Børgesen (RD and GD) and Gracilaria edulis (Gmelin) Silva (RE and GE) was attempted by raft method from August, 2014 to May, 2015 at Thonithurai, southeastern coast of India, for 180 days in order to evaluate color stability, growth rates, pigment composition, sap components, and the agar yield and quality. Coloration pattern of green and red strains of G. debilis and G. edulis was fixed, and no interchange in color occurred during the cultivation. Red strains of both G. edulis (RE) and G. debilis (RD) showed higher performance in biomass yield and phycoerythrin content over their green counterparts. Maximum biomass yields of 12.458 ± 1.24 kg fresh wt m −2 and 5.49 ± 0.26 kg fresh wt m −2 were observed in G. debilis and G. edulis, respectively. Higher DGR of 5.82 ± 0.57 % day −1 and 5.42 ± 1.73 % day −1 were observed in G. edulis and G. debilis, respectively. Highest gel strength recorded in G. debilis was 800 ± 15 g cm −2 and followed by G. edulis 695 ± 15 g cm −2 . Green and red strain of G. debilis (GD and RD) and G. edulis (GE and RE) showed similar pattern in DGR, phycocyanin and allophycocyanin content, agar yield, gel strength, gelling temperature, melting temperature, sulfate content, and mineral composition of sap (p > 0.05). The growth rates observed in green and red strains of both species were considered adequate for commercial farming, and the present agar-related data fulfilled the industrial and pharmaceutical requirements.

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“…(Umamaheswara Rao and Kaliaperumal 1976;De Wreede 1978;Fletcher 1989, 1990;Sukumaran and Kaliaperumal 2000;Zhao et al 2008;Kerrison and Le 2016). In the Mandapam coastal region, surface seawater temperature is in the range of 27-32°C and does fluctuate much (Sukumaran and Kaliaperumal 2000;Veeragurunathan et al 2015aVeeragurunathan et al , 2015b.…”

Section: Discussionmentioning

confidence: 99%

Development of zygote for seed production of Sargassum swartzii in India

Kavale

Veeragurunathan

2016

J Appl Phycol

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Sargassum swartzii is economically exploited in India for alginate production. Indiscriminate harvesting of S. swartzii in natural beds leads to fast depletion. For sustainable utilization of this alga, it is inevitable to undertake its mass cultivation. Therefore, investigations were undertaken to develop a technology that can boost cultivation of this important species. An attempt was made to optimize the culture conditions for developing zygote-derived germlings for artificial seed production through vegetative parts such as vesicles and tertiary leaves. Vesicles and tertiary leaves (n = 90) were subjected to a range of irradiances (05, 25, and 45 μmol photons m −2 s −1 ), salinity (15, 20, 25, 30, 35, 40, 45, 50, and 55 psu), and photoperiod (8:16, 10:14, 12:12, 14:8, and 16:8-h (L/D) regimes under 30-day culture. Maximum regeneration (%) of receptacle from vesicles and tertiary leaf was observed at an irradiance of 45 μmol photons m −2 s −1 , 35 psu salinity, and 12:12-h (L/D) photoperiod which appears to be the most optimal condition. Variations in receptacle regeneration through vesicles and tertiary leaves were highly significant under different irradiances, salinities, and photoperiods (p < 0.05), and there were no significant differences between % regeneration of vesicles and tertiary leaves (p > 0.05). Germlings development followed the eight nuclei, one egg pattern which is quite common in the Sargassaceae. Within a day, multicellular germlings were developed with a bunch of unicellular rhizoids from fertilized oospores through repeated cell divisions. These findings confirmed that vesicles and tertiary leaves can be used as seed stock for the development of artificial seed production in S. swartzii as they contain primordial tissue for receptacle development.

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Cultivation of Gracilaria dura in the open sea along the southeast coast of India

Cited by 30 publications

References 38 publications

Biofouling in marine aquaculture: a review of recent research and developments

Biofouling in marine aquaculture: a review of recent research and developments

Growth and biochemical characterization of green and red strains of the tropical agarophytes Gracilaria debilis and Gracilaria edulis (Gracilariaceae, Rhodophyta)

Development of zygote for seed production of Sargassum swartzii in India

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