Figure 1.
Location of Juan Fernández Archipelago and Islas Desventuradas in relation to Chile and New Zealand.
Islas Robinson Crusoe, Santa Clara and Alexander Selkirk collectively make up the Juan Fernández Archipelago.
Figure 2.
Lobster fishing gear on the Juan Fernández Archipelago.
A - Technology consists of a wooden boat, gas-powered winch, depth finder and outboard engine. Photograph by Alejandro Perez-Matus. B - Wooden lobster traps. Photograph by Fabian Ramírez.
Figure 3.
Map showing underwater survey locations, spatial regions and MR locations.
A – Map of Islas Robinson Crusoe and Santa Clara showing the main fishing port of Bahía Cumberland and underwater survey locations (a–f; see Table 1 for names). B – Spatial regions used in model scenarios (A–F) with 200m depth contour. C – Location of 10% MR used in model scenarios. D – Location of 30% MR used in model scenarios.
Table 1.
Model parameters and initial conditions for the three periods; Fishing, Over-fishing and Future of fishing.
Table 2.
Fishers' ecological knowledge recorded by region from lobster fishers and results of underwater survey for Jasus frontalis (% of total abundance) at sites on the Juan Fernández Archipelago.
Figure 4.
Shifting baselines in lobster abundance in the Juan Fernández Archipelago.
Calculated baselines for 1550–2008 and predictions for ‘future of fishing’ modeling scenarios (2008–2050).
Figure 5.
Lobster catch for Islas Robinson Crusoe and Santa Clara.
Estimated proportion of Chilean lobster (Jasus frontalis) fishery catch from Islas Robinson Crusoe and Santa Clara (red line) with predicted catch from bioeconomic fishery model (blue line) for the “Fishing Period” from 1930–1967 and the “Over-fishing Period” from 1967–2008.
Table 3.
Results of model selection analyses for the “Fishing” and “Over-fishing” Periods.
Figure 6.
Predicted model results under different management scenarios.
A - Predicted lobster biomass within the Juan Fernández archipelago for differing management and conservation strategies for the ‘future of fishing’ period from 2008–2050. B - Predicted model results for lobster catch in the Juan Fernández archipelago under different management and conservation strategies for the ‘future of fishing’ period from 2008–2050. C - Cumulative catch from 2008–2050 predicted from the ‘future of fishing’ model for differing management scenarios. D - Predicted lobster spillover by the ‘30% MR’ scenario from the ‘future of fishing’ model. Graph depicts change in population due to spillover in each region (measured as net change in population; positive values correspond to net immigration and negative values to net emigration). Regions A, B and F are closed to fishing with region A located in between regions B & F (see Figure 3 for map). Regions C and E are adjacent to areas closed to fishing, whereas region D does not share a boundary with a closed area (Figure 3).