Table 2.
Chemical composition of seaweed species (all values on DM basis)1.
| Type |
Red seaweed |
Green seaweed |
Brown seaweed |
|||||
|---|---|---|---|---|---|---|---|---|
| Species | Porphyra spp. | Aaparagopsis taxiformis | Asparagopsis armata | Ulva sp. | Ascophyllum nodosum | Macrocystis Sp. | Laminaria Sp. | Costaria Costata |
| Nutrients, % | ||||||||
| CP | 24.6-38.1 | 17.8 | 18.3 | 15.3-18.6 | 6.0-8.3 | 10.1 | 9.8-16.6 | 7.8 |
| NDF | 43.1 | 36.9 | 27.2 | 22.8-26.2 | 20.9-22.0 | 19.9 | 16.6 | – |
| ADF | 6.6 | 11.6 | 10.9 | 7.6-8.7 | 13.1 | 12.6 | Na | – |
| Either extract | 0.3-0.5 | 0.4 | 0.32 | 1.2 | 3.9 | 0.6 | 0.8 | – |
| Ash | 6.5-8.7 | – | 10.0 | 7.7-23.2 | 22.0-22.5 | 32.9 | 29.9-31.5 | – |
| Minerals, % | ||||||||
| Ca | 4.4 | 3.8 | 4.47 | 2.9 | 1.0-3.0 | 14.1 | 0.08 | 0.12 |
| P | 3.8 | 0.2 | 0.27 | 0.27 | 0.1-0.2 | 2.9 | – | – |
| Na | 4.1 | 6.6 | 9.36 | 2.0-3.3 | 2.4-4.0 | 36.5 | 25.3 | 4.16 |
| Mg | 4.9 | 0.8 | 1.38 | 1.7 | 0.5-1.09 | 39.2 | 5.5 | 0.96 |
| Minerals, mg/kg | ||||||||
| Fe | 2.2 | 6.2 | 1.188 | 1.24 | 134.0 | 117.0 | 233,2 | – |
| Mn | – | 0.1 | 0.63 | 0.10 | 10-50 | 11.0 | 6.2 | 1.48 |
| Zn | 0.15 | 0.24 | 0.07 | 0.05 | 35-100 | 12.0 | 111.7 | 10.8 |
| Cu | 0.51 | 0.87 | – | 7.07 | 4.0-15 | 2.0 | 14.9 | 6.4 |
| S | – | 4.5 | – | – | 2.0-2.3 | – | – | – |
| Iodine | 1.5 | 1.71-3.37 | 0.6-1.8 | 0.9 | 0.01-0.1 | ND | 0.9 | 0.03 |
| Bromoform2 | – | 1,723 | 1,320 | 1503 | 2.73 | 1503 | 49.7 | – |
| Phlorotannins | – | 5.0-6.04 | 5.05 | 1.0-2.05 | 20-14 | 21 | 2.0 | 2.0 |
DM = dry matter; OM = organic matter; CP = crude protein; NDF = neutral detergent fiber; ADF = acid detergent fiber; TDN = total digestible nutrient.
Sources: Abirami and Kowsalva (2012), Abudabos et al. (2013), Aminina et al. (2020), Anderson et al. (2006), Applegate and Gray (1995), Arasaki and Arasaki (1983), Baardseth (1970), Belanche et al. (2016), Cian et al. (2013), El-Baroty et al. (2007), Farley (2012), Hind et al. (2014), Holdt and Kraan (2011), Imbs et al. (2009), Leyton et al. (2016), Machado et al. (2016), Marino et al. (2016), Nunes et al. (2018), Roque et al. (2019a, b), Nunes et al. (2018), Ragan and Jensen (1978), Roque et al. (2019b).
Bromoform contents are μg/g DM, unless stated otherwise ng/g fresh weight.
Minor level of bromoform productions (ng/g of fresh weight): Manley et al. (1992), Carpenter and Liss (2000).
Minor levels of total phenolic compounds (Nunes et al., 2018).
Minor levels of condensed tannins (Kafhi et al., 2020; Mihaila, 2020).