Seasonal Variation in the Chemical Composition of Tropical Australian Marine Macroalgae

Article

Abstract

The proximate chemical composition (ash, soluble carbohydrate, lipid and protein) was determined in 30 common species of tropical Australian marine macroalgae from Darwin Harbour (1226′S, 13051′E), in summer (hot and wet) and winter (cool and dry). There was a wide diversity of species in both seasons (19 species in summer and 20 species in winter). In most species, the major component was soluble carbohydrate (chlorophytes range 2.5–25.8% dry weight (dw), phaeophytes range 8.4–22.2% dw, rhodophytes range 18.7–39.2% dw) with significantly higher (p < 0.05) percentages only in winter season rhodophytes. Highest percentages of protein were found in rhodophytes collected in the summer (range 4.8–12.8% dw), with significantly lower percentages (p < 0.05) during winter. All species had lipid contents within the range 1.3–7.8% dw, with highest percentages in summer phaeophytes, but no significant differences between species or season. Most species had moderate to high ash contents (24.2–89.7% dw), with the highest percentages during summer. Compared with summer samples, macroalgae collected in winter had higher energy value and slightly lower percentages of inorganic matter. The variation of algal groups and chemical composition may influence the availability of the food source for the majority of herbivores, which in turn is likely to effect their ecology and community structure.

Key words

tropical macroalgae seasonal variation carbohydrate lipid protein 

References

  1. Abbott IA (1988) Food and food products from algae. In: Lembi CA, Waaland JR (eds), Algae and Human Affairs. Cambridge Univ. Press, Cambridge, pp. 135–147.Google Scholar
  2. Banaimoon SA (1992) Fatty acids in marine macroalgae from Southern Yemen (Hadramout) including occurrence of eicosatetraenoic (20:4) and eicosapentaenoic (20:5) acids. Bot. Mar. 33: 165–168.CrossRefGoogle Scholar
  3. Bligh EG, Dyer WJ (1959) A rapid method of total lipid extraction and purification. Can. J. Biochem. Physiol. 37: 911–917.PubMedGoogle Scholar
  4. Brett JR, Groves TD (1979) Physiological energetics. In: Hoar WS, Randall DJ (eds), Fish Physiology Vol. VIII, Academic Press, London, pp. 279–351.Google Scholar
  5. Chapman VJ, Chapman DJ (1980) Seaweeds and Their Uses. Chapman and Hall, London.Google Scholar
  6. Commonwealth Bureau of Meteorology, Australia. 1998. http://www.bom.gov.au/climate/averages/tablesa/cw_014015.shtml
  7. Dubois M, Giles KA, Hamilton KS, Rebers PA, Smith F (1956) Colorimetric method for the determination of sugar and related substances. Anal. Chem. 18: 350–356.CrossRefGoogle Scholar
  8. Hawkins SJ, Hartnoll RG (1983) Grazing of intertidal algae by marine herbivores. Oceanogr. Mar. Biol. Ann. Rev. 21: 195–282.Google Scholar
  9. Kaehler S, Kennish R (1996) Summer and winter comparisons in the nutritional value of marine macroalgae from Hong Kong. Bot. Mar. 39: 11–17.CrossRefGoogle Scholar
  10. Kumar V (1993) Biochemical constituents of marine algae from Tuticorin coast. Indian J. Mar. Sci. 22: 138–140.Google Scholar
  11. Mercer JP, Mai KS, Donlon J (1993) Comparative studies on the nutrition of two species of abalone, Haliotis tuberculata Linnaeus and Haliotis discus hannai Ino. I. Effects of algal diets on growth and biochemical composition. Invertebrate Reprod. Develop. 23: 2–3.Google Scholar
  12. Renaud SM, Parry DL, Luong-Van T (1994) Microalgae for use in tropical aquaculture I: Gross chemical and fatty acid composition of twelve species of microalgae from the Northern Territory, Australia. J. Appl. Phycol. 6: 337–345.CrossRefGoogle Scholar
  13. Renaud SM, Lambridinis G, Luong-Van T, Parry DL, Lee C (1997) Chemical composition of algae for use in Trochus niloticus. studies. In: Lee CL, Lynch PW (eds), Trochus: Status, Hatchery Practice and Nutrition, Australian Centre for International Agricultural Research, Canberra, pp. 88–96.Google Scholar
  14. Renaud SM, Luong-Van T, Parry DL (1999) The gross chemical composition and fatty acid composition of 18 species of tropical Australian microalgae for possible use in mariculture. Aquaculture 170: 147–159.CrossRefGoogle Scholar
  15. Robeldo D, Pelegrin YF (1997) Chemical and mineral composition of six potentially edible seaweed species of Yucatan. Bot. Mar. 44: 301–306.Google Scholar
  16. Wong KH, Cheung PCK (2000) Nutritional evaluation of some subtropical red and green seaweeds Part I – proximate composition, amino acid profiles and some physico-chemical properties. Food Chem. 71: 475–482.CrossRefGoogle Scholar
  17. Wynne MJ, Luong-Van Thinh J (1997) A report on collections of benthic marine algae from Darwin, Northern Australia. In: Lee CL, Lynch PW (eds), Trochus: Status, Hatchery Practice and Nutrition, Australian Centre for International Agricultural Research, Canberra, pp. 81–87.Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Faculty of Science and Primary IndustriesCharles Darwin UniversityDarwinAustralia

Personalised recommendations