Rachel A. Turner

Habitat degradation and fishing effects on the size structure of coral reef fish communities

Overfishing and habitat degradation through climate change pose the greatest threats to sustainability of marine resources on coral reefs. We examined how changes in fishing pressure and benthic habitat composition influenced the size spectra of island-scale reef fish communities in Lau, Fiji. Between 2000 and 2006 fishing pressure declined in the Lau Islands due to declining human populations and reduced demand for fresh fish. At the same time, coral cover declined and fine-scale architectural complexity eroded due to coral bleaching and outbreaks of crown-of-thorns starfish, Acanthaster planci. We examined the size distribution of reef fish communities using size spectra analysis, the linearized relationship between abundance and body size class. Spatial variation in fishing pressure accounted for 31% of the variation in the slope of the size spectra in 2000, higher fishing pressure being associated with a steeper slope, which is indicative of fewer large-bodied fish and/or more small-bodied fish. Conversely, in 2006 spatial variation in habitat explained 53% of the variation in the size spectra slopes, and the relationship with fishing pressure was much weaker (approximately 12% of variation) than in 2000. Reduced cover of corals and lower structural complexity was associated with less steep size spectra slopes, primarily due to reduced abundance of fish < 20 cm. Habitat degradation will compound effects of fishing on coral reefs as increased fishing reduces large-bodied target species, while habitat loss results in fewer small-bodied juveniles and prey that replenish stocks and provide dietary resources for predatory target species. Effective management of reef resources therefore depends on both reducing fishing pressure and maintaining processes that encourage rapid recovery of coral habitat.

Declining reliance on marine resources in remote South Pacific societies: ecological versus socio-economic drivers

Degraded coral reef ecosystems yield limited goods and services, which is expected to have significant socio-economic impacts on isolated tropical island communities with strong reliance on coral reefs. This study investigates socio-economic changes, specifically in fresh fish consumption and fishing activities, associated with environmental degradation at five fishing grounds (qoliqoli) in the Lau Islands (Fiji). Semi-structured interviews with fishers and senior household members revealed that the importance of fishing was low relative to other occupations, and consumption of fresh fish has declined over the last decade. Reduced fishing and choice of fresh fish is largely attributable to an increased need to derive income as well as new income-generating opportunities. A possible consequence of reduced reliance on marine resources was limited awareness of recent environmental degradation caused by climate-induced coral bleaching and outbreaks of coral-feeding crown-of-thorns starfish. Limited use and reduced awareness of the local marine environment in the short term may erode social memory and local ecological knowledge, reducing opportunities to fall back on marine resources. This may also compromise long-term economic and social stability. Conversely, low reliance on marine resources may confer greater flexibility to adapt to future ecological change in the marine environment. Importantly, changes in fish consumption and exploitation of marine resources were linked to socio-economic factors rather than a consequence of recent degradation of marine environments. Greater knowledge of the dynamics driving change in marine resource use is necessary to understand how societies respond to ecological and socio-economic change, and to identify opportunities for adaptive sustainable ecosystem management.

Addressing uncertainty in marine resource management; combining community engagement and tracking technology to characterise human behavior

Small-scale fisheries provide an essential source of food and employment for coastal communities, yet the availability of detailed information on the spatiotemporal distribution of fishing effort to support resource management at a country level is scarce. Here, using a national-scale study in the Republic of Congo, we engaged with fishers from 23 of 28 small-scale fisheries landing sites along the coast to demonstrate how combining community engagement and relatively low cost Global Positioning System (GPS) trackers can rapidly provide fine-scale information on: (1) the behavioural dynamics of the fishers and fleets that operate within this sector; and (2) the location, size and attributes of important fishing grounds upon which communities are dependent. This multi-disciplinary approach should be considered within a global context where uncertainty over the behaviour of marine and terrestrial resource-users can lead to management decisions that potentially compromise local livelihoods, conservation, and resource sustainability goals. This article is protected by copyright. All rights reserved

Using satellite AIS to improve our understanding of shipping and fill gaps in ocean observation data to support marine spatial planning

1Centre for Ecology and Conservation, College of Life and Environmental Sciences, University of Exeter, Penryn, Cornwall, UK 2Association RENATURA Congo, Ecocentre, Pointe Noire, Congo 3Wildlife Conservation Society (WCS), Marine Program, Bronx, NY, USA 4Wildlife Conservation Society, Congo Program, Brazzaville, Congo 5Wildlife Conservation Society, Gabon Program, Libreville, Gabon 6Environment and Sustainability Institute, University of Exeter, Penryn Campus, Penryn, Cornwall, UK 7College of Life and Environmental Sciences, Environmental Biology Group, Hatherly Laboratories, University of Exeter, Exeter, UK

Exploring ‘islandness’ and the impacts of nature conservation through the lens of wellbeing

Motivated by growing concern as to the many threats that islands face, subsequent calls for more extensive island nature conservation and recent discussion in the conservation literature about the potential for wellbeing as a useful approach to understanding how conservation affects peoples lives, this paper reviews the literature in order to explore how islands and wellbeing relate and how conservation might impact that relationship. We apply a three-dimensional concept of social wellbeing to structure the discussion and illustrate the importance of understanding island–wellbeing interactions in the context of material, relational and subjective dimensions, using examples from the literature. We posit that islands and their shared characteristics of ‘islandness’ provide a useful setting in which to apply social wellbeing as a generalizable framework, which is particularly adept at illuminating the relevance of social relationships and subjective perceptions in island life – aspects that are often marginalized in more economically focused conservation impact assessments. The paper then explores in more depth the influences of island nature conservation on social wellbeing and sustainability outcomes using two case studies from the global north (UK islands) and global south (the Solomon Islands). We conclude that conservation approaches that engage with all three dimensions of wellbeing seem to be associated with success.

Supporting Enhancement of Stewardship in Small-Scale Fisheries: Perceptions of Governance Among Caribbean Coral Reef Fishers

Small-scale fishing livelihoods dependent on Caribbean coral reefs face an uncertain future with global climate change and mounting anthropogenic pressures threatening ecosystem integrity and resilience. In the context of future threats to coral reefs, improved governance is critical to enhance the efficacy of coral reef management. Recent research places increasing emphasis on identifying governance arrangements that enable participation and engagement, with the improved ‘social fit’ of institutions expected to engender stewardship among fishers. However, few studies have examined the perspectives of resource users in relation to a wide range of articulated principles for good governance processes. This study contributes to an improved understanding of how fisher perceptions relate to diverse governance arrangements in the Wider Caribbean Region. We quantify perceptions among 498 reef-dependent fishers in relation to principles of ‘good governance’ in 12 communities across four Caribbean countries: Barbados, Belize, Honduras, and St. Kitts and Nevis. We describe perceptions relating to two underlying governance themes – institutional acceptance (reflecting principles of legitimacy, transparency, fairness, and connectivity) and engagement in reef governance (reflecting principles of accountability and inclusiveness). In addition, we identify socio-demographic factors associated with each set of perceptions and explore the implications for future governance of small-scale Caribbean reef fisheries. The findings suggest that an understanding of heterogeneous perceptions within small-scale fisheries can inform more targeted interventions to improve the fit of governance arrangements for different groups. Governance may be more effective if perceptions are used to identify areas in which to pursue greater engagement of resource users in stewardship.

Changing storminess and global capture fisheries

Climate change-driven alterations in storminess pose a significant threat to global capture fisheries. Understanding how storms interact with fishery social-ecological systems can inform adaptive action and help to reduce the vulnerability of those dependent on fisheries for life and livelihood.