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Spionid mudworm infestation of farmed abalone (Haliotis spp.)

journal contribution
posted on 2023-05-16, 14:00 authored by Leonard, M, Judith HandlingerJudith Handlinger, Powell, MD
Severe spionid infestations of farmed abalone (Haliotis spp.) were reported from several sea-based culture facilities during 1995-1997. Shell blister coverage was estimated at 30% and mortality rates of 50% or greater of total populations were recorded. Two spionid species: Boccardia knoxi Rainer and Polydora hoplura Claparede were present in blisters. Mean B. knoxi mudworm prevalence was 36.5 (S.D.=19, n=40) per abalone in stock surviving until late 1997. The percentage of total abalone weight comprising the soft tissues was significantly reduced (P<0.01, Mann-Whitney U-test) from 71.1% (S.D.=2.1%, n=24) to 64.5% (S.D.=6.0, n=11) and 49.6% (S.D.=10.4%, n=23) at two affected farms. Follow up trials from 1998 Showed a significant inverse relationship between percentage of shell affected by blisters and both length and whole weight of abalone (df=1,47, P<0.001 for both). © 2003 Elsevier Science B.V. All rights reserved.

History

Publication title

Aquaculture

Volume

221

Issue

1-4

Pagination

85-96

ISSN

0044-8486

Department/School

Institute for Marine and Antarctic Studies

Publisher

Elsevier Science BV

Place of publication

Amsterdam, Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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