Tanzanian Coastal and Marine Resources: Some Examples Illustrating Questions of Sustainable Use

This is Chapter 4 of the book Lessons Learned: Case Studies in Sustainable Use. The coast of Tanzania is characterised by a wide diversity of biotopes and species, typical of the tropical Indowest Pacific oceans, and the peoples living there utilise a variety of its natural resources. Because of the extent of the diversity and variety, several different examples are used by this study to elucidate the complexity of issues and multiplicity of management responses related to use of coastal and marine resources. It emerges that coastal management requires an integrated cross-sectoral approach to address the wide array of inter related issues involved.The study describes the status of selected resources from the principal biotopes (coral reefs, mangroves, seagrass beds and beaches) as well as fish stocks, and it examines various forms of their utilisation. Some special cases of endangered species are also examined. The study attempts to analyse questions of sustainable use in relation to ecosystem dynamics, socio-economic processes, institutions and policies. The characteristics for what we consider as approaching a state of sustainable use are proposed, and the requirements considered necessary for ensuring sustainability are outlined. Past experience and the current status of coastal and marine resource uses are summarised through the examples chosen in order to explain the main constraints to the attainment of sustainability. Cross cutting issues related to the breakdown of traditional management systems for common property resources in the face of increasing commercialisation, privatisation, and external interventions appear to pose general problems. The general experiences of community projects, legislation, and mitigation measures are assessed from the examples we have chosen

Reproductive Biology and Fishery-Related Characteristics of the Malabar Grouper ( Epinephelus malabaricus

The reproductive biology and fishery-related characteristics of the Malabar grouper (Epinephelus malabaricus) (Bloch and Schneider, 1801) specimens were investigated. The size of females ranged from 25 to 113 cm total length (LT), with 50% sexually mature at 79 cm LT, and the males (97 cm to 114 cm LT) were larger than the females. Due to the sex ratios and size distribution of the sample, it appeared that the groupers change sex between 97 and 113 cm LT. However, the gonadal histology data lacked specimens in the transitional stage. The spawning peak occurred in November, as defined by the presence of ripe females, and the spawning season lasted from September to February. The size of the fish correlated positively with the water depth at capture, which is also related to oxygen levels in deep water being more favourable for larger fish. Larger specimens (>100 cm LT) were targeted by fishers between December and February, when the northeast monsoon coincides with calmer weather and the spawning season. Fishers were interviewed, and observations were made on fishing gear, vessels, and grounds. There was no indication that small-scale fishers targeted spawning aggregations; therefore, fisheries independent research is recommended in order to verify the time, location, and behaviour of the spawning of Malabar groupers for management and conservation purposes

Lessons Learned: Case Studies in Sustainable Use, Conclusion

The conclusion of Lessons Learned: Case Studies in Sustainable Use summarizes the overarching lessons learned from the case studies provided in the volume. 1. Sustainability of uses of renewable natural resources is dependent on the existence of a 'sustainable society'at the local, national and global levels. 2. Successful biological conservation is a function of equity and democracy. 3. To achieve greater sustainability of uses of natural resources will likely require modification of the roles of organizations and government agencies in authority. 4. The current conservation paradigm of Protected Areas (including as applied to the 'biodiversity hotspots'concept) may not be economically viable in many developing countries, simply because the opportunitycosts often exceed the value local people receive from their existence. National and international agencies and organizations realize most of the value from designation of protected areas and 'hotspots'. 5. It is not possible to transpose directly the combination of factors that influence one case to another site, and expect the same impact or result.6. Donor agencies and/or central government policies need to consider management requirements beyond project cycles in order to promote long-term sustainability of resource uses.7. External factors such as war and natural disasters can have an over-riding influence on the sustainability of resource use. 8. Interventions on key resources by external institutions often pressure transformation of local governance systems. The impact of these changes is often overlooked. More specific observations of common features. Furthermore, the conclusion provides lessons related to policy, social processes, institutions, and information

Lessons Learned: Case Studies in Sustainable Use, Preface Page

This preface page of the volume Lessons Learned: Case Studies in Sustainable Use, provides a summary of the book's purpose and structure. Enhancing sustainability requires a multidisciplinary approach. Because there is such diversity in resources, uses, and users, there is no universal formula, yet to promote, or assess, practices in context is essential. Without this capacity approaches to sustainable use will remain superficial and ineffective.The present volume presents six detailed cases of uses of different facets of biological diversity in Africa (East, West and Southern), Central Asia and South America-Latin America;. The objective of the project was to identify 'Lessons Learned' from examples of sustainable use. To address this objective, six cases were selected because they had been implemented for several years and they were being implemented in different regions, thus enhancing the potential for identifying key lessons. Each of the case studies was examined using an 'Analytic Framework for Assessing the Factors that Influence Sustainability of Uses of Wild Living Natural Resources' The Analytic Framework (Annex 1) provided a consistent, systematic approach to the analysis of the cases according to 'domains of issues' considered important in assessing sustainability, including inter alia, ecological processes and functions, economic factors, societal and institutional factors

Remodelling of Cortical Actin Where Lytic Granules Dock at Natural Killer Cell Immune Synapses Revealed by Super-Resolution Microscopy

Super-resolution 3D imaging reveals remodeling of the cortical actin meshwork at the natural killer cell immune synapse, which is likely to be important for secretion of lytic granules

Seeing Through Fishers’ Lenses: Exploring Marine Ecological Changes Within Mafia Island Marine Park, Tanzania

Insights from traditional ecological knowledge (TEK) of the marine environment are difficult to integrate into conventional science knowledge (CSK) initiatives. Where TEK is integrated into CSK at all, it is usually either marginalized or restricted to CSK modes of interpretation, hence limiting its potential contribution to the understanding of social-ecological systems. This study uses semi-directive interviews, direct observations, and structured open-ended questionnaires ( n = 103) to explore TEK of marine ecological changes occurring within the Mafia Island Marine Park, Tanzania, and factors contributing to these changes. It illuminates TEK insights that can be valuable in parallel with CSK to provide a more nuanced understanding of ecological changes. In some areas, fishers observed coral reef growth, increased fish abundance, and increased sea temperatures, whereas in others, they reported decreases in sea level, coral cover, fish abundance, catch composition, catch quantities, and fish size. They associated these changes with interrelated factors emanating from environmental processes, conservation outcomes, marketing constraints, population dynamics, and disappearance of cultural traditions. Utilizing TEK without restricting it to CSK modes of interpretation has the potential to improve CSK initiatives by promoting complementarity and mutual enrichment between the two kinds of knowledge, thereby contributing new insights that may enhance adaptive management and resilience in social-ecological systems

Seeing Through Fishers’ Lenses: Exploring Marine Ecological Changes Within Mafia Island Marine Park, Tanzania

-Insights from traditional ecological knowledge (TEK) of the marine environment are difficult to integrate into conventional science knowledge (CSK) initiatives. Where TEK is integrated into CSK at all, it is usually either marginalized or restricted to CSK modes of interpretation, hence limiting its potential contribution to the understanding of social-ecological systems. This study uses semi-directive interviews, direct observations, and structured open-ended questionnaires ( n = 103) to explore TEK of marine ecological changes occurring within the Mafia Island Marine Park, Tanzania, and factors contributing to these changes. It illuminates TEK insights that can be valuable in parallel with CSK to provide a more nuanced understanding of ecological changes. In some areas, fishers observed coral reef growth, increased fish abundance, and increased sea temperatures, whereas in others, they reported decreases in sea level, coral cover, fish abundance, catch composition, catch quantities, and fish size. They associated these changes with interrelated factors emanating from environmental processes, conservation outcomes, marketing constraints, population dynamics, and disappearance of cultural traditions. Utilizing TEK without restricting it to CSK modes of interpretation has the potential to improve CSK initiatives by promoting complementarity and mutual enrichment between the two kinds of knowledge, thereby contributing new insights that may enhance adaptive management and resilience in social-ecological systems

Undernutrition Among Under-Five Children in Two Fishing Communities in Mafia Island Marine Park, Tanzania

Abstract Undernutrition and food insecurity are critical problems among under-five children in many developing countries. This study was carried out for eight months between 2009 and 2011. It combined quantitative data (N=156) and qualitative data to explore nutritional status among under-five children in Jibondo and Chole villages within Mafia Island Marine Park in Tanzania. Weight-for-age analysis was performed according to World Health Organization standards to determine the proportion of underweight children among the samples. The prevalence of underweight children was high in both villages, and in Jibondo village it was even higher (69%) than in Chole village (40%). Interviewees attributed the exceptionally high underweight problems in Jibondo to a substantial reduction in breast-feeding frequency. This was because mothers resumed seaweed farming and octopus fishing soon after delivery. Consequently, infants were fed poor-quality nutritional substitute foods at a tender age. Decreased family income, food insecurity, changes in gender roles and increased responsibilities for women were also perceived to be key underlying problems contributing to higher levels of undernutrition among children in the study areas. If healthy generations and sustainable social-ecological systems are to be achieved within the Park in the future, policies that review fishing restrictions, improve fish trading, increase household food security and liberate mother's time for breastfeeding and child-caring activities would be essential to address the current undernutrition among the under-fives