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Applying stock indicators for assessment of a recreational surf clam (Donax deltoides) fishery in Victoria, Australia

Lewis, Zac, Giri, Khageswor, Versace, Vincent and Scarpaci, Carol 2013, Applying stock indicators for assessment of a recreational surf clam (Donax deltoides) fishery in Victoria, Australia, Journal of the marine biological association of the United Kingdom, vol. 93, no. 5, pp. 1381-1387, doi: 10.1017/S0025315412001695.

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Title Applying stock indicators for assessment of a recreational surf clam (Donax deltoides) fishery in Victoria, Australia
Author(s) Lewis, Zac
Giri, Khageswor
Versace, VincentORCID iD for Versace, Vincent orcid.org/0000-0002-8514-1763
Scarpaci, Carol
Journal name Journal of the marine biological association of the United Kingdom
Volume number 93
Issue number 5
Start page 1381
End page 1387
Total pages 7
Publisher Cambridge University Press
Place of publication Cambridge, Eng.
Publication date 2013
Keyword(s) fisheries management
recreational harvest
bivalve
pipi
cockle
Summary The aim of this study was to apply indicators for monitoring the impacts of harvest in a recreational surf clam fishery. We investigated trends in abundance, biomass and size structure and proportion of sexual maturity for the pipi (Donax deltoides) in Venus Bay, Australia. The surf clam stock was sampled during the peak harvesting season in the Australian summer (November to February) at four sites exposed to varying degrees of recreational harvest. Sampling was based on three transects at each site; with 0.027 m3 (0.3 m × 0.3 m × 0.3 m) quadrats stratified within transects by tidal position. Restricted maximum likelihood mixed model analyses were used to examine fixed effect combinations after including a priori random effect for transect within site. Results demonstrated that relative abundance varied significantly (P = 0.0090) among sampling months but not among sites. Relative abundance declined across the peak summer harvest season. The proportion of maturity varied significantly (P = 0.00026) among sites whereas relative biomass varied significantly (P = 0.0043) among months by sites. Relative biomass and the proportion of maturity were considerably higher at the site exposed to minimal harvest compared to other sites. This study demonstrates that a suite of indictors including biomass, size–frequency and proportion of maturity are likely to provide a more accurate assessment of stock status in recreationally fished surf clam populations, than relative abundance. This highlights the need to develop methods to estimate relative biomass in surf clam populations that are not exploited commercially.
Language eng
DOI 10.1017/S0025315412001695
Field of Research 119999 Medical and Health Sciences not elsewhere classified
0602 Ecology
0608 Zoology
0607 Plant Biology
Socio Economic Objective 929999 Health not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2012, Marine Biological Association of the United Kingdon
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084207

Document type: Journal Article
Collection: School of Medicine
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