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Accounting for habitat and seafloor structure characteristics on southern rock lobster (Jasus edwardsii) assessment in a small marine reserve

Young, mary A., Ierodiaconou, Daniel, Edmunds, Matt, Hulands, Lachlan and Schimel, Alexandre C. G. 2016, Accounting for habitat and seafloor structure characteristics on southern rock lobster (Jasus edwardsii) assessment in a small marine reserve, Marine biology, vol. 163, Article Number : 141, pp. 1-13, doi: 10.1007/s00227-016-2914-y.

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Title Accounting for habitat and seafloor structure characteristics on southern rock lobster (Jasus edwardsii) assessment in a small marine reserve
Author(s) Young, mary A.
Ierodiaconou, DanielORCID iD for Ierodiaconou, Daniel orcid.org/0000-0002-7832-4801
Edmunds, Matt
Hulands, Lachlan
Schimel, Alexandre C. G.
Journal name Marine biology
Volume number 163
Season Article Number : 141
Start page 1
End page 13
Total pages 13
Publisher Springer
Place of publication Berlin, Germany
Publication date 2016-06
ISSN 1432-1793
Keyword(s) marine protected areas
southern rock lobster
Jasus edwardsii
bathymetry
habitat
Summary Where to place marine protected areas (MPAs) and how much area they should cover are some of the most basic questions when designing MPAs. Based on the theory of island biogeography, larger reserves are likely to protect more species and individuals but smaller reserves have been shown to positively influence populations. In this study, we assess a localised population of the ecologically and economically important southern rock lobster (Jasus edwardsii) inside and outside a small reserve. We used standardised fishery assessment trapping methods to sample J. edwardsii populations inside a reserve and an adjacent area outside the reserve. The population characteristics of the captured individuals were compared inside and outside the reserve using t tests (male size, female size,number of reproductive females, number of individuals and biomass), and we found that there were significantly greater numbers and larger individuals and biomass inside the reserve. However, many assessments of MPA effectiveness are confounded by differences in habitat. To account for possible differences in habitat, we collected multibeam bathymetry data to allow us to characterise seafloor structure and video data to assign each sampling location to a biotope class based on macroalgae assemblages. Then, using generalised linear models (GLMs), we assessed differences in populations while accounting for habitat. The GLMs revealed that there was still a significant difference in populations inside the reserve despite habitat differences inside and outside the reserve. We demonstrate a methodological approach to provide a baseline data set to assess MPA effectiveness through time and measure how habitat may respond to indirect consequences of fishing or other human impacts at the species or ecosystem level. We also highlight some of the limitations in sampling design and data availability common in MPA studies and resulting implications for assessment.
Language eng
DOI 10.1007/s00227-016-2914-y
Field of Research 060205 Marine and Estuarine Ecology (incl Marine Ichthyology)
050102 Ecosystem Function
06 Biological Sciences
07 Agricultural And Veterinary Sciences
05 Environmental Sciences
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30083821

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