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Circadian and seasonal variations in the metabolism of carbohydrates in Aegla ligulata (Crustacea: Anomura: Aeglidae)
Oliveira, G.T.; Fernandes, F.A.; Bond-Buckup, G.; Bueno, A.A.; Silva, R.S.M. (2003). Circadian and seasonal variations in the metabolism of carbohydrates in Aegla ligulata (Crustacea: Anomura: Aeglidae). Mem. Mus. Vic. 60(1): 59-62
In: Memoirs of the Museum of Victoria. Museum of Victoria: Melbourne. ISSN 0814-1827, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Oliveira, G.T.
  • Fernandes, F.A.
  • Bond-Buckup, G.
  • Bueno, A.A.
  • Silva, R.S.M.

Abstract
    The aim of this study is to evaluate the effect of circadian and seasonal variations on the metabolism of carbohydrates in different tissues of the freshwater anomuran Aegla ligulata Bond-Buckup and Buckup, 1994. Samples of A. ligulata were collected monthly from August 1999 to August 2000 in Tainhas, São Francisco de Paula, RS, Brazil, at 0600 h, 1200 h and 1800 h. Samples of haemolymph and tissues (hepatopancreas, gills and muscle) were taken to determine glucose and glycogen levels. Data indicated the presence of high levels of haemolymphatic glucose, especially in spring, and we also found circadian differences between males and females. These variations seem to be related to the reproductive period of the species, food availability and the degree of environmental exploration. These factors lead to different metabolic adjustments in distinct species of crustaceans.

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