Low water exchange Gracilariopsis bailiniae Zhang &amp; B.M. Xia culture in intensive milkfish culture effluents: effects of seaweed density on seaweed production and effluent treatment

Carton-Kawagoshi, Rhea Joy; Elle, B. J. G.; Corre, Valeriano L.; Satoh, Shuichi; Notoya, Masahiro; Fujita, Daisuke

doi:10.1007/s10499-013-9674-1

Cited by 6 publications

(2 citation statements)

References 21 publications

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“…G. verucosa's removal rate of TAN (67%) was higher than that reported by Carton-Kawagoshi et al (2014) for Gracilaria sp. cultured in fish effluent (45%), but in that study and ours, the NO 3 removal rate was similar (50%).…”

Section: Discussioncontrasting

confidence: 66%

“…In the three lower densities of seaweed, the SGR (2.3-2.6% day À1 ) was within the optimum range, that is, above 2% day À1 (Komarawidjaja and Kurniawan, 2008), but below the highest level (8.8%; range 1.8-8.8%) reported by Nelson et al (2001). The seaweed's lower SGR at higher density (S200) is probably due to insufficient nutrient availability (Yang et al, 2006;Huo et al, 2012;Wei et al, 2017) and self-shading (Carton-Kawagoshi et al, 2014) which also inhibits the emergence of new thallus. Our results for temperature, salinity, and pH were within the optimal ranges of 20-30 °C, 17-40 ppt and 7-8.5, respectively (Komarawijaya and Kurniawan, 2008).…”

Section: Specific Growth Rates Of G Verucosa and P Viridismentioning

confidence: 99%

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Organic matter reduction using four densities of seaweed (Gracilaria verucosa) and green mussel (Perna viridis) to improve water quality for aquaculture in Java, Indonesia

Widowati

Prayitno

Rejeki

et al. 2021

Aquat. Living Resour.

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The high organic waste content of river water in Demak, north coast of Java, has caused traditional small-scale pond farmers to stop stocking shrimp. This paper examines whether seaweed and mussel will improve the quality of water these farmers use. The effect of Gracilaria verucosa and Perna viridis on the water quality was assessed by measuring the removal rates (RRs) of total organic material (TOM), total ammonia nitrogen (TAN), nitrite, and nitrate. The specific growth rates (SGRs) of seaweed and mussel were also measured. Thirty-six semi-outdoor tanks containing 800 L of brackish water and 7 cm substrate were randomly assigned to four replications of four densities of G. verucosa: 50 (S50), 100 (S100), 150 (S150), and 200 (S200) g m−2, and of P. viridis: 60 (M60), 90 (M90), 120 (M120), and 150 (M150) g m−2. Weekly, the TOM, TAN, nitrite, and nitrate contents were measured, seaweed and mussel weighted; RRs and SGRs were calculated at the end of the study. The effect of densities on the RRs was significant for both seaweed and mussel. P. viridis was more effective in reducing TOM (by 38%) than G. verucosa (7%); G. verucosa achieved higher RRs for TAN, nitrite, and nitrate. At S200, TOM and TAN decreased by 7.4% and 67%, respectively. At M90, TOM and TAN, decreased by 38% and 49%, respectively. However, nitrite increased significantly at S200 and M150. The SGR of seaweed was significantly lower at S200 than that at S150, S100, and S50. The best performing densities were S100 and M90.

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Section: Discussioncontrasting

confidence: 66%