This study examined the efficacy of community‐level fishery co‐management organizations called Beach Management Units (BMUs) along the Kenyan shores of Lake Victoria. BMUs were established to enhance sustainable Lake Victoria fishery management through increasing the level of community participation to assist in the administration of fisheries rules and regulations by, and for, the fishers. Inefficiencies have emerged, however, inhibiting the effective execution of sustainable fisheries management by the BMUs. Data were collected from 36 BMUs along the Kenyan shores of Lake Victoria. Descriptive and inferential analyses were performed using SPSS Version 20.0. The results indicated that BMUs are successful at educating fishers and that they are aware of fishing rules and regulations. Nevertheless, high violation rates were also observed, suggesting BMUs have limited impact on fisher decisions to comply with regulations. Data suggest that the failure to comply may be due to lack of adequate financial and equipment resources for monitoring, control and surveillance (MCS) operations, making them unable to control illegal fishing in their areas of jurisdiction. Furthermore, financial mechanisms, which would allow BMUs to sustainably fund their administrative and MCS operations, are weak, thereby reducing the BMUs ability to effectively function. The data from this study highlight two activities illustrating significant indices of good performance, namely resolving disputes and receiving visitors. The data also suggest the creation of BMUs has not ensured successful implementation of co‐management of Lake Victoria fisheries. BMUs are successful at activities of a social nature, but have poorly undertaken their core functions related to enforcement and compliance with fishing rules.
The Lake Victoria Basin (LVB) is a global hotspot of aquatic biodiversity, but aquatic ecosystems are under threat from multiple stressors. Most studies on fish have focused on Lake Victoria, while patterns of fish diversity, distribution, and assemblage structure in influent rivers remain poorly understood. To assess threats and conservation status of riverine fishes, we used sampling surveys and searches of published and gray literature to compile data on diversity, distribution, and abundance. In total, 72 fish species were found to inhabit Kenyan rivers and associated wetlands and lakes (excluding Lake Victoria). Low‐order streams (first to third order) in headwaters of rivers are species‐poor and dominated by small‐bodied cyprinids (Enteromius spp.) and clariids (Clarias spp.). A small number of fishes are endemic to rivers, and species turnover across river basins is low. Species dominance is high, with 10 species accounting for >90% of all individuals and weights. Two cyprinid species (Labeobarbus altianalis and Labeo victorianus) account for >65% of all individuals and weights (biomass) per unit effort. Most species occur in small numbers and low biomass is insufficient to sustain a commercial riverine fishery. A review of the literature continues to indicate a reduction in migratory runs of potamodromous fishes from Lake Victoria into influent rivers, although some species, such as L. victorianus and L. altianalis, also maintain stenotopic populations in rivers. Most of the exotic fishes introduced in Lake Victoria, such as Oreochromis nilotics, Oreochromis, Coptodon zillii, Coptodon rendalli, and Gambusia affinis, have invaded and established themselves in rivers, thereby posing a threat to riverine populations. Although this study focuses on Kenyan rivers, the distribution patterns of fishes reflect other rivers of the LVB and have broad implications on threats to riverine biodiversity in other regions undergoing development around the world.
Indigenous community land tenure in many locations worldwide is shifting towards individually parcelized and privatized systems. Among the drivers of this shifting land tenure are distant political-economic forces and commodity markets, from local to global. Accompanying the observed land tenure changes are shifts in livelihoods, away from subsistence-based and toward market-oriented activities. These changes can ultimately impact land use, land cover, and biodiversity conservation. We investigated a global-to-local causal pathway, from agriculture, livestock, and forestry production for distant markets, extending through shifting land tenure and livelihoods, to impacts on forest cover within ejidos (a type of community landholding) across Yucatán, México, where Maya people are the primary land managers. To reveal this causal pathway, we conducted exploratory data analysis, using ordinary least squares regression, mapped variables, and variographic analyses to assess spatial patterns and correlations. We further explored relationships among variables using spatially explicit simultaneous autoregressive models. We found that commodity production for distant markets is strongly related to parcelized ejido lands, which in turn are often deforested. Conversely, community-managed lands, which traditionally involve subsistence-based agroforestry, are much more likely to be densely forested.Overall, we conclude that recent deforestation of ejido lands across the State is, at least partly, the result of shifting land tenure and livelihoods due to the increasing presence of commodity markets. Moreover, we conclude that community-managed lands and associated subsistence livelihoods can attenuate deforestation and potentially advance forest and biodiversity conservation across México and elsewhere.
Community-managed landscapes have valuable conservation potential. In particular, indigenous community management has slowed deforestation. However, globalized agriculture is an underlying driver of changes to indigenous community-managed landscapes. Our objective is to explain a hypothesized global-to-local causal pathway that stems from processes of globalized agriculture and changes to indigenous community-managed landscapes. The global-to-local pathway involves a nested hierarchy of political–economic processes, specifically land and natural resource privatization, commodification, and acquisition. At the local landscape level, we focus on changes to land tenure, livelihoods, land use, and land cover. Changes to land tenure involve a shift away from community and toward individual ownership and management. Concurrently, livelihoods shift away from subsistence and toward market-oriented activities. Subsequently, land use shifts away from small-scale extensive and toward large-scale intensive crop cultivation, away from diverse crop cultivation and toward monocropping, and away from crop toward livestock farming. Ultimately, land cover shifts away from diverse agro-forested and toward homogeneous deforested lands. We illustrate our approach using ejidos, a type of community-managed lands, in Yucatán, México as an exploratory example. We use descriptive statistics to initially assess the shift in ejido land tenure, from community to individually parcelized systems, and the shift in a principal subsistence livelihood and land use activity, from maize cultivation to cattle rearing. We highlight that individually parceled areas within ejidos are more deforested than community-managed areas. In all, we urge landscape conservation scientists to more fully consider not just local actions but also impacts stemming from globalized agriculture and to advance the breadth and depth of more extensive studies and analyses.
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