Opperman A.M., Macey B.M., Hennings S., Bolton J.J., Wieringa F.T., Berger J., Darias Maria J.. (2022). Mineral content of marine organisms to develop nutrition-sensitive approaches to marine aquaculture in South Africa [résumé]. In :
14th Aquaculture Association of Southern Africa Conference 2022. [s.l.] : AASA, p. 81. AASA : Aquaculture Association of Southern Africa, 14., Stellenbosch (ZAF), 2022/07/11-2022/07/14.
Titre du document
Mineral content of marine organisms to develop nutrition-sensitive approaches to marine aquaculture in South Africa [résumé]
Année de publication
2022
Type de document
Colloque
Auteurs
Opperman A.M., Macey B.M., Hennings S., Bolton J.J., Wieringa F.T., Berger J., Darias Maria J.
In
14th Aquaculture Association of Southern Africa Conference 2022
Source
[s.l.] : AASA, 2022,
p. 81
Colloque
AASA : Aquaculture Association of Southern Africa, 14., Stellenbosch (ZAF), 2022/07/11-2022/07/14
Limited information is available on mineral content of South African aquatic organisms. The aim of the study was to determine mineral content of South African marine species, either farmed or identified as candidate aquaculture species, and their by-products (muscle tissue, head, frame or viscera) to estimate their potential contribution to Recommended Nutrient Intakes and identify nutritional and functional components for potential product development for human consumption and/or for animal feeds. The species analysed included fishes (Pomadasys commersonnii, sea-grown Oncorhynchus mykiss, Seriola lalandi, Argyrosomus japonicus), molluscs (Haliotis midae) and seaweeds (Laminaria pallida, Ecklonia maxima, Macrocystis pyrifera, Ulva lacinulata, Gracilaria gracilis). Freeze-dried, composite samples (n=3 per specimen) were analysed by ICP AES and ICP-MS for mineral content. For trace elements (expressed as mean±SD mg/100g dw), iron (Fe) levels in fish fillets of A. japonicus (13.2±3.1) were 3-4-fold higher (p<0.05) compared to other species. O. mykiss (3.2±0.9), S. lalandi (2.7±0.4) and A. japonicus (3.2±0.3) fillets displayed similar zinc (Zn) levels. Calcium and phosphorus levels were similar among fish fillets. For by-products, viscera of S. lalandi and O. mykiss contained the highest (p<0.05) levels of Fe (30.2±2.8) and Zn (35.7±16.6). Among seaweeds, U. lacinulata displayed significantly higher (p<0.05) amounts of Fe and aluminium (Al) (Fe 23.4±2.0; Al 19.3±2.4), followed by G. gracilis (Fe 16.0±1.3; Al 11.4±0.9). These results highlight the importance of assessing the nutritional value and potential harmful elements of different species and the potential of selecting nutrient-rich species to maximise nutritional outcomes of aquaculture and of using by-products to develop innovative food products.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
;
Ressources halieutiques [040]
Localisation
Fonds IRD [F B010091403]
Identifiant IRD
fdi:010091403
