Results 121 to 130 of about 297 (160)

Seascape connectivity: evidence, knowledge gaps and implications for temperate coastal ecosystem restoration practice and policy. [PDF]

NPJ Ocean Sustain
Preston J, Debney A, Gamble C, Hardy MJ, Underwood GJC, Garbutt A, Harley J, Baker R, Dunk RM, Grigg M, Hancock BT, Hendy IW, La Marca EC, Murray J, Pettorelli N, Pittman SJ, Reeves SE, Robertson M, Sturrock AM, Thurstan RH, Unsworth RKF, Ward EA, Ward SL, Watson GJ, Watson SCL, Wedding LM, Worthington TA, Wright RA, Yesson C, Zu Ermgassen PSE.   +29 more
europepmc   +1 more source

Large-scale changes in the spatial distribution of South African West Coast rock lobsters: an overview

African Journal of Marine Science, 2008
A major shift in resource availability in the West Coast rock lobster Jasus lalandii from the traditional fishing grounds on the West Coast to the more southern fishing grounds was observed between the late 1980s/early 1990s and the turn of the century ...
L Hutchings
exaly   +1 more source

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OMP 2008 for South Coast rock lobster resource

2008
OMP 2008 consists of an algorithm that calculates the TAC for the resource using CPUE data collected from each of three areas (New Areas 1, 2 and 3 – see Fig. 1), Note that the TAC for season y+1 will be based upon the CPUE series that ends in season y-1, i.e.
Johnston, Susan J, Butterworth, Doug S, Glazer, Jean Patricia   +2 more
openaire   +1 more source

Initial OMP results for the South Coast rock lobster resource OMP

2008
Some initial results following the development of an OMP framework for the management of South Coast rock lobster are presented here, corresponding to a constant catch scenario and runs of a CPUE-tuned-based feedback control rule. First though, the assumptions made for the OMP testing are listed below.
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source

Final set of OMP results for the South Coast rock lobster resource OMP

2008
Results are presented here for a range of OMP tunings which assume/attain either i) inter-annual TAC constraint of 5%, 7.5% or 10% ii) median recovery levels sp B (2025/2006) of either 1.10, 1.175 or 1.25. The five OMP candidates presented are: OMP1 10% inter-annual TAC constraint + median 1.10 sp B (2025/2006) OMP2 10% inter-annual TAC constraint ...
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source

Future projections for the south coast rock lobster resource using Bayesian methodology

2005
A Bayesian approach is used to assess the south coast rock lobster resource based upon a model that allows for time-varying selectivity. Estimation precision appears good. Biomass projections and their uncertainties are compared for four different scenarios: two constant catch options, and simple empirically and model-based OMPs.
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source

Results for the final OMP 2008 selected for the South Coast rock lobster resource

2008
In Johnston and Butterworth (2008) results for a range of OMPs for the South Coast rock lobster fishery were reported. These OMPs varied with respect to the maximum extent of inter-annual TAC variability allowed (5%, 7.5% or 10%) as well as the median spawning biomass recovery anticipated over the next 20 years ( sp B (2025/2006) - ranges from 1.10 to ...
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source

Overview of the South African west coast rock lobster, hake and pelagic resources and fisheries

2007
The commercial fishery for Jasus lalandii, the South African West Coast rock lobster, began in the late 1800s and at its peak in the early 1950s yielded an annual catch of 17 000t. Although this annual catch has dropped to only some 2000t over recent years, the fishery remains South Africa’s third most valuable in terms of landed value.
Johnston, Susan J, Cunningham, Carryn L, Rademeyer, Rebecca A, Butterworth, Doug S   +3 more
openaire   +1 more source

Recommended TAC 2008 from the new OMP for the South Coast rock lobster resource

2008
Johnston and Butterworth (2008) reports expected results for the final OMP 2008 for the South Coast Rock Lobster fishery. This OMP 1. has a 5% maximum TAC change constraint, and 2. has a median anticipated sp B (2025/2006) of 1.20 under operating Model 3 (MARAM TVS).
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source

Implications to existing OMP of the 2010 updated assessments of the south coast rock lobster resource

2010
Johnston and Butterworth (2008) reported expected results for the final OMP 2008 for the South Coast Rock Lobster fishery. This OMP 1. has a 5% maximum TAC change constraint, and 2. has a median anticipated sp B (2025/2006) of 1.20 under operating Model 3 (MARAM TVS). Recently, a programming glitch in the operating models has been discovered.
Johnston, Susan J, Butterworth, Doug S
openaire   +1 more source