Feeding preference and deterrence in rabbitfish Siganus fuscescens for the cyanobacterium Lyngbya majuscula in Moreton Bay, south-east Queensland, Australia

Capper, A., Tibbetts, I. R., ONeil, J. M. and Shaw, G. R. (2006) Feeding preference and deterrence in rabbitfish Siganus fuscescens for the cyanobacterium Lyngbya majuscula in Moreton Bay, south-east Queensland, Australia. Journal of Fish Biology, 68 5: 1589-1609. doi:10.1111/j.1095-8649.2006.01048.x


Author Capper, A.
Tibbetts, I. R.
ONeil, J. M.
Shaw, G. R.
Title Feeding preference and deterrence in rabbitfish Siganus fuscescens for the cyanobacterium Lyngbya majuscula in Moreton Bay, south-east Queensland, Australia
Journal name Journal of Fish Biology   Check publisher's open access policy
ISSN 0022-1112
Publication date 2006
Sub-type Article (original research)
DOI 10.1111/j.1095-8649.2006.01048.x
Volume 68
Issue 5
Start page 1589
End page 1609
Total pages 21
Editor J F Craig
Place of publication Oxford
Publisher Blackwell Publishing
Collection year 2006
Language eng
Subject C1
270702 Marine and Estuarine Ecology (incl. Marine Ichthyology)
770303 Control of pests and exotic species
Abstract Rabbitfish Siganus fuscescens preferences for Lyngbya majuscula collected from three bloom locations in Moreton Bay, Queensland, Australia, were tested along with a range of local plant species in the laboratory. Consumption of L. majuscula by fish did not differ between wild and captive-bred fish (P = 0.152) but did differ between bloom location (P = 0.039). No relationship was found between consumption rates and lyngbyatoxin-a concentration (r(2) = 0.035, P = 0.814). No correlation existed between C : N and proportion of food consumed when all food types were analysed statistically, whereas a clear correlation was observed when L. majuscula was removed from the calculations. In simulated bloom conditions, fish avoided ingestion of L. majuscula by feeding through gaps in the L. majuscula coverage. Both wild and captive-bred S. fuscescens showed a distinct feeding pattern in 10 day no-choice feeding assays, with less L. majuscula being consumed than the preferred red alga Acanthophora spicifera. Lyngbya majuscula however, was consumed in equal quantities to A. spicifera by wild S. fuscescens when lyngbyatoxin-a was not detectable. Wild fish probably do not preferentially feed on L. majuscula when secondary metabolites are present and are not severely impacted by large L. majuscula blooms in Moreton Bay. Furthermore, poor feeding performance in both captive-bred and wild S. fuscescens suggests that they would exert little pressure as a top-down control agent of toxic L. majuscula blooms within Moreton Bay. (c) 2006 The Fisheries Society of the British Isles.
Keyword Chemical Deterrence
Debromaplysiatoxin
Lyngbyatoxin-a
Siganidae
Top-down Control
Fisheries
Marine & Freshwater Biology
Hare Stylocheilus-longicauda
Marine Natural-products
Secondary Metabolites
Chemical Defenses
Juvenile Rabbitfish
Food
Sea
Toxins
Guam
Aplysiatoxins
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 08:45:44 EST