The fate of Lyngbya majuscula toxins in three potential consumers

Capper, Angela, Tibbetts, Ian R., O'Neil, Judith M. and Shaw, Glendon R. (2005) The fate of Lyngbya majuscula toxins in three potential consumers. Journal of Chemical Ecology, 31 7: 1595-1606. doi:10.1007/S10886-005-5800-5


Author Capper, Angela
Tibbetts, Ian R.
O'Neil, Judith M.
Shaw, Glendon R.
Title The fate of Lyngbya majuscula toxins in three potential consumers
Journal name Journal of Chemical Ecology   Check publisher's open access policy
ISSN 0098-0331
Publication date 2005-07-01
Sub-type Article (original research)
DOI 10.1007/S10886-005-5800-5
Volume 31
Issue 7
Start page 1595
End page 1606
Total pages 12
Editor J.T. Romeo
Place of publication Dordrecht, Netherlands
Publisher Springer
Language eng
Subject C1
321299 Public Health and Health Services not elsewhere classified
730299 Public health not elsewhere classified
270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)
Abstract Blooms of Lyngbya majuscula have been reported with increasing frequency and severity in the last decade in Moreton Bay, Australia. A number of grazers have been observed feeding upon this toxic cyanobacterium. Differences in sequestration of toxic compounds from L. majuscula were investigated in two anaspideans, Stylocheilus striatus, Bursatella leachii, and the cephalaspidean Diniatys dentifer. Species fed a monospecific diet of L. majuscula had different toxin distribution in their tissues and excretions. A high concentration of lyngbyatoxin-a was observed in the body of S. striatus (3.94 mg/kg(-1)) compared to bodily secretions (ink 0.12 mg/kg- 1; fecal matter 0.56 mg/kg(-1); eggs 0.05 mg/kg(-1)). In contrast, B. leachii secreted greater concentrations of lyngbyatoxin-a (ink 5.41 mg/kg(-1); fecal matter 6.71 mg/kg(-1)) than that stored in the body (2.24 mg/kg(-1)). The major internal repository of lyngbyatoxin-a and debromoaplysiatoxin was the digestive gland for both S. striatus (6.31 +/- 0.31 mg/kg(-1)) and B. leachii (156.39 +/- 46.92 mg/kg(-1)). D. dentifer showed high variability in the distribution of sequestered compounds. Lyngbyatoxin-a was detected in the digestive gland (3.56 +/- 3.56 mg/kg(-1)) but not in the head and foot, while debromoaplysiatoxin was detected in the head and foot (133.73 +/- 129.82 mg/kg(-1)) but not in the digestive gland. The concentrations of sequestered secondary metabolites in these animals did not correspond to the concentrations found in L. majuscula used as food for these experiments, suggesting it may have been from previous dietary exposure. Trophic transfer of debromoaplysiatoxin from L. majuscula into S. striatus is well established; however, a lack of knowledge exists for other grazers. The high levels of secondary metabolites observed in both the anaspidean and the cephalapsidean species suggest that these toxins may bioaccumulate through marine food chains.
Keyword Stylocheilus Striatus
Bursatella Leachii
Diniatys Dentifer
Lyngbyatoxin-a
Debromoaplysiatoxin
Bioaccumulation
Opisthobranchia
Secondary Metabolites
Biochemistry & Molecular Biology
Ecology
Hare Stylocheilus-longicauda
Sea Hare
Bursatella-leachii
Natural-products
Gaimard 1824
Gastropoda
Diet
Quoy
Q-Index Code C1
Additional Notes DOI: 10.1007/s10886-005-5800-5

 
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Created: Wed, 15 Aug 2007, 17:02:11 EST