Abundance estimation of blacklip abalone (Haliotis rubra) I. An analysis of diver-survey methods used for large-scale monitoring

Hart, Anthony M.; Gorfine, Harry; Callan, Michael P.

doi:10.1016/s0165-7836(96)00527-9

Cited by 13 publications

(8 citation statements)

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“…Despite this valuable time series of data, recognition of potential biases (Hart et al, 1997), followed by the development of the leaded-line survey design , has resulted in a transition from timedswim to LL surveys for monitoring greenlip populations in the SAAF. Despite these recent advances in FI survey design, its application on greenlip and the fact that ∼55% of South Australia's annual abalone harvest is blacklip, FI surveys on blacklip were established relatively recently.…”

Section: Discussionmentioning

confidence: 99%

“…These include timed-searches (Andrew et al, 2000;McShane, 1994McShane, , 1995Shepherd, 1985), radial (Gorfine et al, 1998;Hart et al, 1997;Mundy et al, 2006) and stratified transects (Sainsbury, 1982;Tarr et al, 2000), and the application of each has been debated with respect to their efficiency, precision and accuracy. Most recently, McGarvey et al (2008) argued that transects distributed semi-systematically within a bounded survey region provide the most valuable data as they can immediately inform management whilst maintaining flexibility for improvements in the accuracy and precision of estimates through time.…”

Section: Introductionmentioning

confidence: 99%

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Detecting change in density and biomass of a benthic marine invertebrate following commercial fishing

et al. 2012

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Detecting change in density and biomass of a benthic marine invertebrate following commercial fishing

et al. 2012

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“…Research into the fisheries biology of Victorian abalone has been ongoing since 1969 (e.g., Beinssen and Powell, 1979;McShane et al, 1988;Sanders and Beinssen, 1996;Troynikov and Gorfine, 1998) and was supplemented by a fishery-independent monitoring program and stock assessments from the late 1980s to support decisions on quota adjustments (Hart et al, 1997;Gorfine et al, 1998;Figure 5). Stochastic population dynamics modeling was subsequently implemented during the late 1990s to underpin stock assessments that were based on two performance indicators-mature and exploitable biomass-that were directly linked to the TACC decision rules prescribed in the 2002 Victorian Abalone Fishery Management Plan (VAFMP; Anonymous, 2002).…”

Section: Victoriamentioning

confidence: 99%

Fifty Years of Sustained Production from the Australian Abalone Fisheries

Mayfield

Mundy

Gorfine³

et al. 2012

Reviews in Fisheries Science

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The sustained production of abalone from the five state-managed (Tasmania, Victoria, South Australia, New South Wales, and Western Australia) Australian abalone fisheries has contrasted with many of those elsewhere that exhibited rapid and sustained declines in production. Australian abalone fisheries are significant at local, regional, state, national, and international scales. Key attributes are (1) harvesting, processing, and reinvestment of profits occur away from major metropolitan centers; (2) they are among the most valuable wild-catch species in all states; (3) the combined Australian abalone harvest in 2011 (>4,500 t) had a landed value of ∼AU$200M and represented 15% of the Australian total wild-catch production; and (4) this level of production made these fisheries the dominant contributor (60%) to global wild-catch abalone production. Unlike many other abalone fisheries, total catches were controlled by limited entry, quotas, size limits, and geographic boundaries, overseen by stringent compliance regimes, early in their history. Subsequently, state-based research programs, explicitly tasked with providing scientific advice to support management decisions, undertook assessments to match harvests with stock productivity. This information upon which to base management decisions contributed to long-term (>20 years) stable harvests and enabled relationships among stakeholders to develop around consideration of the information and advice for management. In general, rights-holders developed stewardship for the resource, and this has led to numerous important outcomes, including evolving resource co-management and a nationally representative industry entity, the Abalone Council of Australia. The Abalone Council of Australia, state-based industry entities, and ongoing relationships among rights-holders, fishery managers, and researchers play vital roles in addressing and overcoming current and impending challenges for these fisheries. These difficulties include (1) urban encroachment into coastal regions (the so-called "sea change" phenomenon); (2) a growing interest in access to the abalone resource, reflecting the increasing, culturally diverse Australian population; (3) the everpresent threat of illegal fishing; (4) recent total allowable commercial catch reductions, particularly in Victoria and New South Wales, to facilitate stock rebuilding; (5) changing market conditions; (6) declining profitability from increasing operational costs and appreciation of the Australian dollar; and (7) environmental changes, such as prolonged drought and warmer seas associated with shifts in climate. Overall, this review demonstrates that abalone can be harvested sustainably over extended periods, despite aspects of their demography that suggest higher vulnerability to overexploitation, providing the management systems that control harvesting activities and external impacts that encompass several key underpinning elements. This review also identifies likely challenges to sustained production and shows that the future of ...

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“…Other studies that have experimentally compared timed swim and area-based survey methodologies in abalone stocks have shown higher precision (lower CV) in timed swim methods, but lower accuracy (McGarvey, 2004;Hart et al, 1997). Overall, the evidence supports the hypothesis that the DVI survey method does provide a reliable index of abundance, but it may not be an accurate measure of density per se.…”

Section: Discussionmentioning

confidence: 51%

Digital video surveys of abalone (Haliotis sp.) stocks by commercial fishers in Western Australia

Hart¹,

Fabris²,

Brown³

et al. 2008

Fisheries Research

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Abundance estimation of blacklip abalone (Haliotis rubra) I. An analysis of diver-survey methods used for large-scale monitoring

Cited by 13 publications

References 10 publications

Detecting change in density and biomass of a benthic marine invertebrate following commercial fishing

Detecting change in density and biomass of a benthic marine invertebrate following commercial fishing

Fifty Years of Sustained Production from the Australian Abalone Fisheries

Digital video surveys of abalone (Haliotis sp.) stocks by commercial fishers in Western Australia

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