Development of a seaweed species-selection index for successful culture in a seaweed-based integrated aquaculture system

Seaweed nutrient physiology: application of concepts to aquaculture and bioremediation

“…Nutrient uptake kinetics is a useful method to infer the mechanisms of uptake, to determine the uptake rate at a range of concentrations (Hurd et al 2014), and to examine the potential of a seaweed for IMTA (Kang et al 2013). Inorganic nutrients move across the cell membrane via three general mechanisms: (1) passive transport in which nutrients move via passive diffusion down a concentration gradient; (2) facilitated diffusion which is also by transport down an electrochemical gradient but carrier or channel proteins are involved; and (3) active transport against a concentration gradient, which, unlike 1 and 2, requires energy to fuel membrane transport systems; for example, carrier proteins (see Harrison & Hurd 2001;Hurd et al 2014).…”

“…In addition, when very high concentrations of NH 4 + were supplied (700 µM) in a time course experiment, saturating uptake kinetics were observed for Undaria pinnatifida (Harvey) Suringar, Ecklonia cava Kjellman, Gracilaria incurvata Okamura, Porphyra yezoensis [= Pyropia yezoensis (Ueda) M.S. Hwang & H.G.Choi] and Ulva compressa Linnaeus (Kang et al 2013): this study illustrates that if concentrations are sufficiently high, NH 4 + uptake will become saturated; that is, the supply is greater than the metabolic demand.…”

Bioremediation using Gracilaria chouae co-cultured with Sparus macrocephalus to manage the nitrogen and phosphorous balance in an IMTA system in Xiangshan Bay, China

“…have proven capable of taking up excess nutrients (particularly C, N, and P) and generating new biomass in the IMTA system (Troell et al, 1997;Neori et al, 1998;Mao et al, 2009;Huo et al, 2010;Abreu et al, 2011;Huo et al, 2012). As biofilters, the seaweeds that exhibit high nutrient accumulation and growth rates and are able to tolerate high temperatures include G. parvispora (Nelson et al, 2001), G. edulis (Gmelin) Silva , G. tikvahiae (McLachlan) (Kinne et al, 2001), G. incurvata (Kang et al, 2013) and G. chouae (Li et al, 2014). The present study showed that co-culture of G. chouae and S. macrocephalus was effective at remediation, with removal efficiencies of NO 3 -N, NO 2 -N, NH 4 -N, and PO 4 -P as high as 37.76%, 36.99%, 29.27%, and 40.64%, respectively, compared with the control.…”

Seaweed resources of Korea

“…Although Korea is one of the more advanced countries in seaweed aquaculture, no commercial scale land-based seaweed aquaculture has been developed. Some research has focused on physiological studies and the selection of potential species for use in land based integrated multitrophic aquaculture and nutrient bioextraction systems (Chung et al 2002;Kang et al 2008Kang et al , 2013Kang et al , 2014Shin et al 2020). In the early 2000s, Chung and his colleagues at Busan National University first introduced the IMTA concept to Korea (Chung et al 2002).…”