No-take marine reserves (NTMRs) are being implemented for various conservation and fishery management objectives. Well-designed ecological monitoring programs should accompany the implementation of NTMRs to assess their performance against stated objectives. However, monitoring programs
often have limited funding and limited access to experienced (“expert”) underwater visual census (UVC) observers. Consequently, use of non-expert, volunteer observers to collect marine ecological data has increased. The need to assess the quality and utility of non-expert data
has been acknowledged. Few studies have directly compared expert and non-expert assessments, and these are generally one-point-in-time comparisons. Here we assess the magnitude of NTMR:Non-reserve density ratios for target and non-target reef fish collected in five separate years over a decade
(2000–2009) by expert and non-expert observers in the Palm Islands, Great Barrier Reef, Australia. Despite variations in methods and resultant differences in absolute fish density estimates, NTMR:Non-reserve density ratio estimates made by experts and non-experts usually differed by
10% or less. Furthermore, estimates of the statistical significance of reserve effects made by experts and non-experts had at least 80% agreement over the decade. The findings support the notion that UVC data collected by trained non-expert observers can provide reliable information on the
magnitude of NTMR effects.
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Great Barrier Reef;
no-take marine reserves;
Document Type: Research Article
School of Marine and Tropical Biology, James Cook University, Townsville, Queensland, Australia
ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland, Australia
Department of Environment and Conservation, Kensington, Perth, Western Australia
Publication date: 2013-07-04
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