The role of protein extracts in the induction of disease in Acanthaster planci

Rivera-Posada, Jairo, Owens, Leigh, Caballes, Ciemon F., and Pratchett, Morgan (2012) The role of protein extracts in the induction of disease in Acanthaster planci. Journal of Experimental Marine Biology and Ecology, 429. pp. 1-6.

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Abstract

Thiosulfate–citrate–bile–sucrose agar (TCBS) has been shown to induce pathogenesis in the crown-of-thorns starfish (COTS), Acanthaster planci, providing potentially novel options to control COTS outbreaks, but the mechanistic basis for this effect is unknown. This study explores reactions of COTS to individual ingredients of TCBS, testing for allergic reactions versus pathogenesis. Four out of nine TCBS chemical ingredients tested induced allergic reactions and death in injected COTS. Peptone 10 g l− 1 and oxgall 8 g l− 1 induced 100% mortality, while yeast extract and agar induced death in 40% and 20% of COTS, respectively, 48 h after injection. Peptone was evaluated at three different concentrations (10 g, 5 g, and 1 g l− 1). Peptone 10 g l− 1 induced 100% mortality, peptone 5 g l− 1 killed 60% of injected COTS, and peptone 1 g l− 1 induced death in only 20% of challenged COTS, indicating that toxicity of peptone is concentration-dependent. Sodium citrate induced moderate mucus production in all COTS challenged, but disease did not progress and COTS completely recovered after 52 h. The remaining ingredients in TCBS did not produce any kind of clinical signs of disease. Peptone, oxgall, and yeast are potentially useful in controlling outbreaks because these protein extracts can be safer to use compared to previously used noxious chemicals. In addition, lowered concentrations are required to kill COTS, therefore increasing efficiency by saving time, money, and effort in COTS control programs.

Item ID: 23665
Item Type: Article (Research - C1)
ISSN: 0022-0981
Additional Information:

This article is publicly availble through the Publisher URL.

Funders: Australian Research Council
Date Deposited: 14 Jan 2013 22:48
FoR Codes: 06 BIOLOGICAL SCIENCES > 0605 Microbiology > 060501 Bacteriology @ 50%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 50%
SEO Codes: 96 ENVIRONMENT > 9604 Control of Pests, Diseases and Exotic Species > 960407 Control of Pests, Diseases and Exotic Species in Marine Environments @ 50%
96 ENVIRONMENT > 9605 Ecosystem Assessment and Management > 960507 Ecosystem Assessment and Management of Marine Environments @ 50%
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