Cockles in custody: the role of common property arrangements in the ecological sustainability of mangrove Fisheries on the Ecuadorian Coast

Christine M. Beitl

doi:10.18352/ijc.285

Figures & Tables

figures/ijc2011-2011016-001.jpg — Shrimp farming and mangroves in the two study areas in the provinces of El Oro and Esmeraldas.

figures/ijc2011-2011016-002.jpg — Property Regimes in Isla Costa Rica and around Puerto Hualtaco. Note that the boundary lines around the areas of Isla Costa Rica’s custodia are not definitive.

figures/ijc2011-2011016-003.jpg — Size frequency distribution of A. tuberculosa captured from three types of management regimes in El Oro, Ecuador (n=6565). There are significant differences in shell sizes between the three types of management regimes (F=61.665) and (p=0.000).

figures/ijc2011-2011016-004.jpg — The number of shells gathered per hour differs significantly between the three property regimes: 34/hour in the managed areas of Isla Costa Rica, 28/hour in the areas of the custodia where the fishery is not managed and 26/hour in open access areas around Hualtaco and Isla Costa Rica (n=98, χ²=6.031, df=2, p=0.049).

Table 1

Results of non-parametric two-sample Wilcoxon rank-sum test for differences in the number of shells harvested per hour according to the type of management regime

Table 2

Relationship between property regime and cockle shell size (mm) in El Oro, Ecuador

Table 3

Percent of informants that agree with various statements concerning the social viability of custodias as a management regime for the mangrove cockle fishery in Isla Costa Rica and Hualtaco.

Cockles in custody: the role of common property arrangements in the ecological sustainability of mangrove Fisheries on the Ecuadorian Coast

Figures & Tables

Figure 1

Figure 2

Figure 3

Figure 4

Table 1

Table 2

Table 3

Paradigm

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