A tale of two islands: Decadal changes in rocky reef fish assemblages following implementation of no-take marine protected areas in New South Wales, Australia

Harasti, David; Davis, Tom R.; Mitchell, Emma; Lindfield, Steven J.; Smith, Stephen

doi:10.1016/j.rsma.2017.10.011

Cited by 12 publications

(13 citation statements)

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“…The consistency of the relative differences and log effects size ratios among bioregions (Table 1) indicates that the NTMR effects for C. auratus are general and profound across the state's coastline, despite the substantial differences in the absolute MaxN values among bioregions. Considering longer periods of time, the changes in the relative abundance of C. auratus reported here in this time series reflects the general patterns quantified within specific marine parks across the state (Kelaher et al 2014, 2015b, e.g., Malcolm et al 2015a,b, 2018, Harasti et al 2018a and/or show a maturing of initial patterns (Kelaher et al 2014, Coleman et al 2015. Internationally, similar effects of protection have been observed for C. auratus in several marine reserves in New Zealand where it is also a dominant species on subtidal rocky reefs (Babcock et al 1999, Denny et al 2004, Smith et al 2014, Schiel et al 2018, Appendix S1: Table S3).…”

Section: Discussionsupporting

confidence: 67%

A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages

et al. 2021

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Section: Discussionsupporting

confidence: 67%

A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages

et al. 2021

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“…The difference in zoning response in comparison to Broughton Island may be attributed to the fact that the Fingal Island no-take area covers a smaller area (297 vs. 828 ha), as it is well documented that the size of protected areas affects the effectiveness in increasing fish biomass (Gaines et al, 2010;Malcolm et al, 2016). It has also recently been shown that both Labrids (wrasses) and Sparids were found to significantly increase in abundance within the Broughton Island no-take area compared with only small increases in the Fingal Island notake area (Harasti et al, 2017). Chrysophrys auratus are known to utilize urchin barren habitats (Babcock et al, 1999;Parsons et al, 2014) and given that the Broughton Island no-take area is dominated by Centrostephanus rodgersii urchin barrens, whilst Fingal Island is dominated by kelp Ecklonia radiata (Masens, 2009), it is likely that differing relative abundances between the two locations are influenced by both size and habitats within the no-take areas.…”

Section: Discussionmentioning

confidence: 99%

Increase in Relative Abundance and Size of Snapper Chrysophrys auratus Within Partially-Protected and No-Take Areas in a Temperate Marine Protected Area

et al. 2018

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Marine Protected Areas (MPAs) are known to contribute toward the conservation of marine biodiversity, particularly targeted fishery species. Snapper Chrysophrys auratus are an important recreational and commercial fish species in New South Wales (NSW), Australia, and despite fishery management for this species, they are considered "growth overfished" in this region. To assess how C. auratus respond to the implementation of an MPA with several no-take and partially protected areas in temperate NSW, we monitored their populations over a decade (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017) using baited remote underwater video systems (BRUVs). Surveys were conducted in the Port Stephens-Great Lakes Marine Park with BRUVs deployed on rocky reefs in depths of 20-50 m. Long term seasonal sampling (winter vs. summer) was undertaken at two locations (Broughton and Fingal Island), and changes in C. auratus abundance prior to, and 8 years after zoning implementation, were assessed between these two locations. In total, we sampled five no-take areas within the marine park and five comparative nearby partially protected fished areas and three sites located outside the marine park boundaries. The most pronounced changes in abundance and size structure for C. auratus were observed in the Broughton Island no-take area where numbers increased almost 3-fold (2.91 times) over 8 years of protection. Relative abundance showed seasonal variation at two locations, and we consistently recorded increasing abundance within no-take areas at Broughton and Fingal Island compared to nearby sites open to fishing. Surveys across the five no-take areas found a significant increase in the abundance of C. auratus, whilst the five partially-protected locations in the marine park still recorded higher abundances than sites outside the marine park. In addition, length measurements from stereo-BRUVS indicated that C. auratus were significantly larger in no-take areas compared to partially-protected areas in the marine park and sites outside the marine park. This study demonstrates how the implementation of the marine park and the protection afforded by no-take and partially-protected areas provides refuge for this important fishery targeted species.

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“…Data were examined on fishing activity in two NTAs in the Port Stephens–Great Lakes Marine Park (PSGLMP) in New South Wales (NSW), Australia, to improve understanding about the influence of how short‐term temporal factors influence illegal fishing in NTAs. The PSGLMP is a popular region for recreational fishing (Read, West, Haste, & Jordan, ) and is an important area for fishery target species such as snapper Chrysophrys auratus (Forster), which are in high relative abundance in NTAs compared with fished areas (Harasti, Davis, Mitchell, Lindfield, & Smith, ; Harasti, Williams, Mitchell, Lindfield, & Jordan, ) and also display strong site fidelity within a NTA (Harasti, Lee, Gallen, Hughes, & Stewart, ). A study by Harasti et al () reported illegal recreational fishing within a NTA reduced both the size and abundance of C. auratus .…”

Section: Introductionmentioning

confidence: 99%

Predictive modelling of illegal fishing in no‐take marine protected areas

Davis

Harasti

2020

Fisheries Management Eco

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Illegal fishing is an acknowledged problem within no‐take areas (NTAs), which are frequently used as a marine conservation management tool. While gathering data on illegal fishing is difficult, it is necessary, as these data enable increased efficiency of compliance patrols, where resources are inherently limited. In particular, information about short‐term temporal variations in illegal fishing in NTAs is needed to guide management and compliance efforts. To address this knowledge gap, daily variations in illegal fishing effort were examined using surveillance cameras at two sites in New South Wales, Australia. Generalised linear modelling (GLM) identified that illegal fishing was significantly greater on non‐working days and during periods with no rain, light winds and slight seas. The GLM developed provided useful predictions of illegal activity in both the NTA used to build the model and in a second nearby NTA. The study demonstrated that illegal fishing was principally concentrated on days with good boating conditions and was greater at the study site closer to boat launching facilities. These insights will assist with future targeting of enforcement, community outreach and management efforts, which should focus on days and sites with an increased likelihood of illegal fishing.

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A tale of two islands: Decadal changes in rocky reef fish assemblages following implementation of no-take marine protected areas in New South Wales, Australia

Cited by 12 publications

References 58 publications

A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages

A coherent, representative, and bioregional marine reserve network shows consistent change in rocky reef fish assemblages

Increase in Relative Abundance and Size of Snapper Chrysophrys auratus Within Partially-Protected and No-Take Areas in a Temperate Marine Protected Area

Predictive modelling of illegal fishing in no‐take marine protected areas

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