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1
Jones, Benjamin L., and Richard K. F. Unsworth. "The perverse fisheries consequences of mosquito net malaria prophylaxis in East Africa." Ambio 49, no. 7 (2019): 1257–67. http://dx.doi.org/10.1007/s13280-019-01280-0.
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Abstract Malaria is a serious global health issue, with around 200 million cases per year. As such, great effort has been put into the mass distribution of bed nets as a means of prophylaxis within Africa. Distributed mosquito nets are intended to be used for malaria protection, yet increasing evidence suggests that fishing is a primary use for these nets, providing fresh concerns for already stressed coastal ecosystems. While research documents the scale of mosquito net fisheries globally, no quantitative analysis of their landings exists. The effects of these fisheries on the wider ecosystem assemblages have not previously been examined. In this study, we present the first detailed analysis of the sustainability of these fisheries by examining the diversity, age class, trophic structure and magnitude of biomass removal. Dragnet landings, one of two gear types in which mosquito nets can be utilised, were recorded across ten sites in northern Mozambique where the use of Mosquito nets for fishing is common. Our results indicate a substantial removal of juveniles from coastal seagrass meadows, many of which are commercially important in the region or play important ecological roles. We conclude that the use of mosquito nets for fishing may contribute to food insecurity, greater poverty and the loss of ecosystem functioning.
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Lowe, Benjamin S., Susan K. Jacobson, Happiness Anold, Athanasio S. Mbonde, and Catherine M. O’Reilly. "Adapting to change in inland fisheries: analysis from Lake Tanganyika, East Africa." Regional Environmental Change 19, no. 6 (2019): 1765–76. http://dx.doi.org/10.1007/s10113-019-01516-5.
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Conway, Declan, Edward Allison, Richard Felstead, and Marisa Goulden. "Rainfall variability in East Africa: implications for natural resources management and livelihoods." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 363, no. 1826 (2005): 49–54. http://dx.doi.org/10.1098/rsta.2004.1475.
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This note examines the effects of climate variability on natural–resources management in East Africa. The bimodal rainfall regime in much of East Africa brings rainy seasons from March to May and October to December with greater interannual variability from October to December. We discuss the impacts of rainfall extremes in 1961 and 1997 and explore three examples of natural–resources management in the context of rainfall variability: inland fisheries in East and southern Africa; fluctuations in the level of Lake Victoria; and lake–shore communities around Lake Kyoga in Uganda. The discussion reflects the complexity of linkages between climate, environment and society in the region and highlights implications for natural–resources management. These range from benefits due to improved seasonal rainfall forecasting to reduce the damage of extremes, to improved understanding of existing climate–society interactions to provide insights into the region's vulnerability and adaptive capacity in relation to future climate change.
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McClanahan, TR. "Coral reef fish communities, diversity, and their fisheries and biodiversity status in East Africa." Marine Ecology Progress Series 632 (December 12, 2019): 175–91. http://dx.doi.org/10.3354/meps13153.
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Nielsen, Jesper Raakjær, Poul Degnbol, K. Kuperan Viswanathan, Mahfuzuddin Ahmed, Mafaniso Hara, and Nik Mustapha Raja Abdullah. "Fisheries co-management—an institutional innovation? Lessons from South East Asia and Southern Africa." Marine Policy 28, no. 2 (2004): 151–60. http://dx.doi.org/10.1016/s0308-597x(03)00083-6.
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Mushagalusa, C. D., M. Nshombo, and M. Lushombo. "Littoral fisheries on Cichlidae (Pisces) from the northwestern part of Lake Tanganyika, East Africa." Aquatic Ecosystem Health & Management 17, no. 1 (2014): 41–51. http://dx.doi.org/10.1080/14634988.2014.883893.
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García-Reyes, Marisol, and Shigalla B. Mahongo. "Present and future trends in winds and SST off central East Africa." Western Indian Ocean Journal of Marine Science, no. 1/2020 (February 11, 2021): 63–70. http://dx.doi.org/10.4314/wiojms.si2020.1.6.
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The coast of central East Africa (CEA) is a dynamic region in terms of climate, in which fisheries and marine-related services impact a large portion of the population. The main driver of regional dynamics is the seasonal alternation of the Northeast (NE) and Southeast (SE) monsoons. Winds associated with these monsoons modulate the prevalent, remotely-forced East African Coastal Current (EACC). Here, present and future trends in winds and sea surface temperature (SST) of the CEA and adjacent regions are investigated using reanalysis and reconstructed data, and an ensemble of General Circulation Models. It was found that the winds and SST show unidirectional trends, with magnitude and spatial differences between the NE and SE monsoons. Winds show weakening trends during the NE monsoon, in the past and future, of the Somali region; with no significant trends during the SE monsoon. SST shows increasing trends in the entire region in the past and future, with stronger warming during the NE monsoon off Somalia; SST trends are smaller in the CEA. These trends could impact the CEA through increased water-column stability and decreased upwelling due to shifting of the EACC separation from the continent. However, given the coarse resolution of data analyzed, regional modeling is still necessary to understand the impacts on local dynamics and productivity in the CEA.
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Cepić, Dražen, and Fiona Nunan. "Justifying non-compliance: The morality of illegalities in small scale fisheries of Lake Victoria, East Africa." Marine Policy 86 (December 2017): 104–10. http://dx.doi.org/10.1016/j.marpol.2017.09.018.
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McGlue, Michael M., Kevin M. Yeager, Michael J. Soreghan, et al. "Spatial variability in nearshore sediment pollution in Lake Tanganyika (East Africa) and implications for fisheries conservation." Anthropocene 33 (March 2021): 100281. http://dx.doi.org/10.1016/j.ancene.2021.100281.
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Jurado-Ruzafa, Alba, Eva Hernández, Verónica Duque-Nogal, et al. "Life history parameters of the round sardinella Sardinella aurita in the Central East Atlantic off north-west Africa." Journal of the Marine Biological Association of the United Kingdom 100, no. 6 (2020): 997–1009. http://dx.doi.org/10.1017/s002531542000079x.
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AbstractSardinella aurita has become an important source of fish protein-intake in NW African countries, where one stock is considered from Morocco to south Senegal, performing seasonal reproductive migrations along the coast. Although data are limited for the fisheries involved and for life-history knowledge of the species in the area, a precautionary approach is recommended to avoid overexploitation. Commercial landings of round sardinella produced by the European freezer-pelagic trawlers operating in Mauritanian waters were analysed between May 2004 and February 2012. The length-weight relationships (LWRs) (N = 40,725) did not show significant differences between sexes. Ripening round sardinellas were present throughout the year, but spawning effort rose between June and December. The length at first maturity for males and females was estimated at 27.7 cm TL (2.1 years) and 28.1 cm TL (2.2 years), respectively. Ages were interpreted from otoliths, varying from 0 to 8 years. Von Bertalanffy growth parameters resulted in non-statistically significant differences between sexes (P = 0.28). Natural mortality was estimated at ~0.63 year–1. The results provide important biological information for fisheries assessment of a species that plays an important key role in the current climate change scenario and for the economies of the riparian countries.
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Clark, Timothy P., and Stefano B. Longo. "Examining the effect of economic development, region, and time period on the fisheries footprints of nations (1961–2010)." International Journal of Comparative Sociology 60, no. 4 (2019): 225–48. http://dx.doi.org/10.1177/0020715219869976.
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Anthropogenic activities are impacting marine systems, and the future sustainability of many global fisheries are in serious question. Our analysis draws on prior research in environmental sociology and food systems to better understand the association between economic development and the ecological footprint of fisheries. We provide a series of models to make comparisons across all nations, distinguishing between less-affluent nations and affluent nations over a 50-year period. We focus our analysis on the fisheries footprint of less-affluent nations to further explore how the effect of economic development varies across levels of national economic prosperity, region, and time period. The results of the study indicate that, over time, economic development is increasingly driving the fisheries footprint in less-affluent nations. Because this effect does not occur in affluent nations, we posit that less-affluent nations suffer the ecologically deleterious consequences of economic development more acutely. Furthermore, by utilizing post-estimation techniques for easier comparisons, our findings suggest that the magnitude of economic development’s effect on fisheries is strongest in more recent decades. Our findings also reveal that the effect of economic development is modified by region, as it has a stronger effect on fisheries footprint for less-affluent nations in Central and South America, but weaker in the Middle East and Africa. We conclude with a discussion of the implications for marine sustainability and the challenges posed by an environmentally intensive world capitalist food system.
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MCCLANAHAN, T. R., H. GLAESEL, J. RUBENS, and R. KIAMBO. "The effects of traditional fisheries management on fisheries yields and the coral-reef ecosystems of southern Kenya." Environmental Conservation 24, no. 2 (1997): 105–20. http://dx.doi.org/10.1017/s0376892997000179.
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Many traditions of coastal peoples may be viewed as traditional forms of marine conservation because, like modern fisheries management, they restrict fishing gear, fishing times, and places, but their effects are little studied in practice. A study was undertaken of human culture and fisheries resources in an area of southern Kenya, designated as a national marine reserve, to determine the effect of the existing 'traditional management' on fisheries yields and on the ecological condition of the fished reefs. This area has one of the oldest and most elaborate cultural traditions concerning sacred sites and rituals of sacrifice along the Kenyan coast. The purpose of the customs is, however, to appease spirits rather than to regulate fish stocks which are traditionally seen to fluctuate independently of fishing effort. Many of these traditions have decayed in recent times as Islamization of the culture has occurred, and authority has shifted towards national organizations, weakening the effectiveness of the traditional leaders. Coincidentally, fishers have adopted new or foreign gear, colleagues, and traditions. Two adjacent landing sites (Mvuleni and Mwanyaza) have, however, successfully stopped pull seiners from landing their catch at their sites for over 20 years through passive means. Other landing sites have adopted pull seining. Both landing areas use arguments based on tradition to justify their use of gear. The two landings that restrict pull seining have higher per capita fish catches than those that do not. Nonetheless, there were no obvious differences in the ecological condition of the reefs at these two management areas; both areas were amongst the most degraded reefs reported in East Africa. Biological diversity and coral cover were reduced greatly in all these areas compared to other fished or fully-protected marine park or reserve sites established by the national government. Presently, traditional management is not effective in protecting species diversity or ecological functions, which was probably never the intention of the customs. The conflict between national organizations and local fishers arises because some resource users are concerned that the management proposed by the national organizations will eventually lead to the total loss of access to, and control of the resource by local fishers. There is, therefore, a need to resolve conflicts concerning gear use and regulation, and a need to increase awareness of the expectations and management programmes among the national and local organizations. Many of the traditional forms of management are compatible with the policies of national organizations, but confusion and conflict occur concerning enforcement and its benefits. To solve these conflicts discussions are required between traditional and national fisheries leaders to develop mutually-acceptable policies that augment and share the power of management.
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queiroz, nuno, fernando p. lima, anabela maia, pedro a. ribeiro, joão p. correia, and antónio m. santos. "movement of blue shark, prionace glauca, in the north-east atlantic based on mark–recapture data." Journal of the Marine Biological Association of the United Kingdom 85, no. 5 (2005): 1107–12. http://dx.doi.org/10.1017/s0025315405012154.
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a shark tagging programme along the portuguese coast was initiated in 2001 in collaboration with the national marine fisheries service. from a total of 168 blue sharks (prionace glauca) tagged, 34 sharks were recaptured (20% return rate) providing important information on this species' movement patterns for the area. a total of 28 sharks travelled less than 1000 km while at liberty for time periods ranging from 22 to 1294 days. the remaining fish travelled long distances to north-west africa, central atlantic and the bay of biscay. only one shark made a transatlantic migration, being recaptured 3187 km from the tagging site. north–south movements seem to be related to seasonal sea-surface temperature variation in the north-east atlantic. seasonal segregation of different life stages also occurs.
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Groeneveld, J. C., and A. C. Cockcroft. "Potential of a trap-fishery for deep-water rock lobster Palinurus delagoae off South Africa." Marine and Freshwater Research 48, no. 8 (1997): 993. http://dx.doi.org/10.1071/mf97190.
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An experiment to investigate the potential of a trap-fishery for deep-water rock lobster Palinurus delagoae was conducted off the east coast of South Africa between 1994 and 1996. The 75–425 m depth interval between 27°S and 32°S was stratified according to depth and latitude, and three regions (North, Central and South) were sampled systematically over the three years. Sampling by commercial vessels operating long-lines and traps included an experimental phase (fixed fishing positions) and a commercial phase (no restriction on fishing location). Generalized linear models were used to investigate the influence of year, region, sampling phase, month and soak time. Sampling phase was significant, with traps set during the commercial phase catching more than those set in the experimental phase. The effect of soak time on catch rates was not significant. The almost-50% decrease in the combined abundance index combined with a marked decrease in mean lobster size over the study period suggests a relatively low fisheries potential for this species in South African waters; this may be attributable to the relative scarcity of suitable habitat in the area.
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Nunan, Fiona. "Wealth and welfare? Can fisheries management succeed in achieving multiple objectives? A case study of Lake Victoria, East Africa." Fish and Fisheries 15, no. 1 (2013): 134–50. http://dx.doi.org/10.1111/faf.12012.
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McClanahan, T. R., E. Verheij, and J. Maina. "Comparing the management effectiveness of a marine park and a multiple-use collaborative fisheries management area in East Africa." Aquatic Conservation: Marine and Freshwater Ecosystems 16, no. 2 (2006): 147–65. http://dx.doi.org/10.1002/aqc.715.
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Mathooko, Jude Mutuku. "Application of traditional ecological knowledge in the management and sustainability of fisheries in East Africa: a long-neglected strategy?" Hydrobiologia 537, no. 1-3 (2005): 1–6. http://dx.doi.org/10.1007/s10750-004-2788-8.
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Bassa, Samuel, Dickson Oteino Owiti, Eric Ogello, et al. "Ecosystem Integrity of the Upper Victoria Nile in East Africa based on Habitat and Fish Species Biotic Indices." Uganda Journal of Agricultural Sciences 19, no. 1 (2020): 33–49. http://dx.doi.org/10.4314/ujas.v19i1.4.
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Riverine ecosystems are continuously been compromised by human activities resulting in threatening their integrity. In this study, integrity of Upper Victoria Nile River was assessed using habitat quality and fish biotic indices. Experimental gillnetting was done bi-annually in 9 stations along the river from 2008 to 2018. Nine habitat metrics were used to estimate habitat quality index at every sampling station. Fish sampled, were sorted, identified to species level, and weighed. Counts of introduced and indigenous as well as tolerant and intolerant species were recorded to generate species richness. A total of 10.642 fish, 65 species belonging to nine families were recorded. Dominant species were Lates niloticus 62.79%, Oreochromis niloticus 23.51%, Mormyrus kannume 13.64%; other species were ≤0.06%. Tolerance and trophic guild showed carnivores (61.5%), omnivores (21.5%) and detrivores (16.9%).Mean habitat quality index, total fish catch and fish-based index of biotic integrity varied among stations with highest record of 26.6±6.9, 289.2±51.8 and 30.6±7.9 at sampling station (ST4) respectively. The lowest was 19.4±7.3, 93.1±13.2 and 26.7±6.8 at sampling station (ST2) respectively. On a spatial basis, indices recorded significant differences among stations (p < 0.05). Results indicated a fair fisheries biodiversity that need better conservation management of habitat type of the upper Nile.
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Reid, Tim A., Robert A. Ronconi, Richard J. Cuthbert, and Peter G. Ryan. "The summer foraging ranges of adult spectacled petrels Procellaria conspicillata." Antarctic Science 26, no. 1 (2013): 23–32. http://dx.doi.org/10.1017/s0954102013000266.
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AbstractSatellite transmitters were attached to eight adult spectacled petrels Procellaria conspicillata Gould captured during the early incubation period at their breeding grounds on Inaccessible Island, one of the Tristan da Cunha Islands in the central South Atlantic Ocean. Data on their at-sea distribution was obtained for up to six months. All birds remained within the South Atlantic from 24–44°S, with most between 25 and 40°S. Breeding birds mainly foraged in oceanic waters, but failed breeders or non-breeders concentrated their foraging activity over the Rio Grande Rise and the Walvis Ridge and along the shelf break off the east coast of South America. Little foraging occurred along the Benguela shelf break off southern Africa. Non-breeders favoured relatively warm water with low chlorophyll concentrations, reducing the risk of bycatch in fisheries. Tracked birds spent 16% of their time in areas with high levels of tuna longline fishing activity, with overlap greater for non-breeding birds (22%) than breeding birds (3%). Birds in this study foraged in shallower waters along the continental shelf edge off South America than spectacled petrels tracked in this area in winter, potentially increasing their risk of exposure to demersal longline fisheries in this area in summer.
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Kuguru, Baraka. "First record of giant freshwater prawn Macrobrachium rosenbergii (de Man, 1879) from small-scale fisheries in East Africa, confirmed with DNA barcoding." BioInvasions Records 8, no. 2 (2019): 379–91. http://dx.doi.org/10.3391/bir.2019.8.2.19.
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Rollinson, Dominic P., Ben J. Dilley, Delia Davies, and Peter G. Ryan. "Year-round movements of white-chinned petrels from Marion Island, south-western Indian Ocean." Antarctic Science 30, no. 3 (2018): 183–95. http://dx.doi.org/10.1017/s0954102018000056.
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AbstractWhite-chinned petrelsProcellaria aequinoctialisL. are the most frequently recorded procellariiform species in the bycatch of Southern Hemisphere longline fisheries. Our study investigated the year-round movements of ten adult white-chinned petrels (seven breeders, three non-breeders/suspected pre-breeders) from Marion Island tracked with global location sensor (GLS) loggers for three years. Additionally, 20 global positioning system (GPS) tracks were obtained from breeding white-chinned petrels during incubation (n=9) and chick-rearing (n=11). All GLS-tagged birds remained, year-round, in the area between southern Africa and Antarctica, not making any major east/west movements. Three core areas (50% kernels) were utilized: around the Prince Edward Islands (PEI; incubation and early chick-rearing),c. 1000 km west of PEI (pre-breeding and early incubation) and around South Africa (non-breeding birds). The only area where 50% utilization kernels overlapped with intensive longline fishing effort was off the Agulhas Bank (non-breeding season). Our results confirm the lack of foraging overlap between the two subspecies; nominate birds (South Georgia/south-western Indian Ocean) utilize separate areas toP. a. steadi(New Zealand/sub-Antarctic islands), and thus should be treated as separate management units. Knowledge of the year-round movements of a vagile species, such as the white-chinned petrel, is important for its continued conservation.
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Sowers, Jeannie, and Erika Weinthal. "Humanitarian challenges and the targeting of civilian infrastructure in the Yemen war." International Affairs 97, no. 1 (2021): 157–77. http://dx.doi.org/10.1093/ia/iiaa166.
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Abstract Many modern conflicts, from Iraq to Yemen, have emerged as brutal wars in which state and non-state actors directly and indirectly target a wide array of civilian infrastructures, including water, energy and food systems. Similar to many twentieth-century wars, a common feature of the wars in the Middle East and North Africa in the twenty-first century has been the ‘civilianization’ of war, as civilian casualties far outnumbered battlefield deaths. We explore the targeting of civilian infrastructures in the Yemeni war (2011–2019) to explicate the connections between conflict, hunger and disease. We draw upon interviews with UN and humanitarian organizations, an original database tracking civilian infrastructure destruction, and a variety of print sources to document the extent and spatial distribution of the targeting of water, energy, agricultural and health systems in Yemen. We elucidate how the conduct of the Yemeni war has undermined human security and livelihoods and has created ethical, logistical and organizational challenges for humanitarian organizations and for advancing peacebuilding efforts. We find that after the 2011 popular uprising, some non-state actors targeted the energy sector; however, the scope and intensity of wartime targeting of civilian objects, particularly those associated with agriculture, fisheries and health, increased significantly once the Saudi-led coalition entered the war in 2015. Loss of livelihoods, internal displacement, currency depreciation, and blockades and sieges further intensified the wartime spread of hunger and disease. The targeting of civilian infrastructures significantly hinders peacebuilding efforts to restore basic services, rebuild livelihoods and strengthen governance mechanisms.
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Mařincová, Lenka, Simona Šafaříková, and Radka Cahlíková. "Analysis of main risk factors contributing to obesity in the region of East Africa: meta-analysis." African Health Sciences 20, no. 1 (2020): 248–56. http://dx.doi.org/10.4314/ahs.v20i1.30.
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Background: Over a few decades obesity has become a major global health problem. Its prevalence worldwide has more than doubled since 1980. The situation is expected to worsen in the future, especially in the developing countries that experience nutrition transition due to economic growth. It contributes to reduction in malnutrition which supports an increase in obesity prevalence.
 Objectives: The aim of this study was to analyse the predictors of obesity in the region of East Africa.
 Methods: Meta-analysis of existing studies was used in order to find the different risk factors and their significance in obesity development. Data extracted from 16 published academic research articles described the situation in East African countries. The significance of the effect of each variable was tested by means of an asymptotic chi-square test, or Fisher's exact (factorial) test and the risk ratios were calculated.
 Results: Based on the chi-square test and the risk ratios of the aggregated data, three risk factors were found to be significant in the development of obesity – gender, type of residence and socio-economic status. In East African countries, women are significantly more likely to be obese. Living in an urban area and socioeconomic status are also positively associated with obesity. Because of insufficient data three other risk factors did not prove to be of any significance – alcohol consumption, smoking and education level.
 Conclusion: Conclusions of this meta-analysis confirm world trends but we also found results that are not in line with them (e.g. education). This meta-analysis confirms the huge existing research gap concerning obesity predictors in the East African region.
 Keywords: Obesity; meta-analysis; East Africa.
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van der Elst, Rudy, Bernadine Everett, Narriman Jiddawi, Gerald Mwatha, Paula Santana Afonso, and David Boulle. "Fish, fishers and fisheries of the Western Indian Ocean: their diversity and status. A preliminary assessment." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 363, no. 1826 (2005): 263–84. http://dx.doi.org/10.1098/rsta.2004.1492.
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The Western Indian Ocean represents ca. 8% of the world's oceans but generates only 4% of the global industrial catch. This region is also home to a great proportion of the world's population, living in developing countries with a high dependence on marine resources. Trends in the declared landings of marine resources from the Western Indian Ocean suggest that this ocean may be approaching its maximum harvest potential of ca. 4 Mt per annum, but underreported artisanal catches complicate more–detailed analyses. There is a growing demand for ‘new resources’ to make up for declining stocks, while several large fluctuations are linked to changes in market demand and over exploitation. Artisanal fisheries in the region are highly diversified. Preliminary results are presented of a project that evaluates the conservation status and sustainable management practices in 168 different fishery types. It is concluded that the majority of the region's artisanal fisheries are not adequately supported by scientific information and that management strategies need to be improved if the enormous development challenges of East African countries are to be met.
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Odhone, Albert Ogoma, Ishmail Mahiri, and Francis Onsongo. "Assessing Gender Roles in Dagaa Fishery Value Chain among Fishing Communities on Lake Victoria, A Case Study of Lake Victoria Beaches In Siaya County, Kenya." International Journal of Current Aspects 4, no. 2 (2020): 13–32. http://dx.doi.org/10.35942/ijcab.v4i2.124.
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Fisheries in the East Africa region have suffered due to less emphasis given to some fishery specifically Dagaa (Rastrineobolaargentea), whose quantity is the highest of all the species in the Lake Victoria. Despite the importance of this resource in Kenya, there has been a concern of gender parity and inequality in terms of roles played by both gender in harvesting, processing, trading and marketing in the Dagaa fishery. This study analyzed gender roles in Dagaa Fishery Value Chain among fishing communities around Lake Victoria in Bondo Sub County, in Siaya County, Kenya. The study addressed the following objectives: Identified the various roles of men and women in Dagaa Fishery Value Chain, discussed factors influencing gender roles in Dagaa Fishery Value Chain, analyzed the barriers to women’s participation in certain Dagaa Fishery Value Chain and examined the strategies to overcome challenges in gender roles in Dagaa fishery value chain in Bondo Sub-County, Siaya County. The study adopted a cross-sectional research design. This study was guided by two models; gender analysis framework model that was developed by Sarah Longwe and supply chain model. Purposive sampling technique was used to select Bondo Sub-County and fishing community in Bondo Sub-County; random sampling technique was used to select five (5) fish landing sites/beaches where quantitative data were collected from 186 out of the targeted 188 primary respondents, from among the forty-four beaches of Lake Victoria in Bondo Sub-County. Quantitative data was analyzed using SPSS Version 25, and descriptive statistics such as frequencies and percentages were used in presenting analyzed data. The results were presented using tables and charts. The study findings revealed that majority of the boats and fishing gears were owned by men, motorized boats belonged to men while a higher percentage of females still had the paddled boats. While men dominated the fishing of Dagaa, women dominated processing and trading of Dagaa in the beaches. The study noted that men made higher returns than their female counterparts at all levels of Dagaa fishery value chain. The study concluded that there is a still wide disparity among gender roles in Dagaa fishery value chain. Most of the activities in the value chain are still dominated by men. This study recommends that women be encouraged to take part in Dagaa fishery value chains, empowerment of women to take part in transportation and distribution of Dagaa and application of various strategies such as joining SACCOs to access loans at low interest rates, formation of groups for ease of access to credit services and weakening patriarchy to mitigate factors affecting Gender roles in Dagaa fishery value chains.
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Fiorella, Kathryn J., Erin M. Milner, Charles R. Salmen, et al. "Human health alters the sustainability of fishing practices in East Africa." Proceedings of the National Academy of Sciences 114, no. 16 (2017): 4171–76. http://dx.doi.org/10.1073/pnas.1613260114.
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Understanding feedbacks between human and environmental health is critical for the millions who cope with recurrent illness and rely directly on natural resources for sustenance. Although studies have examined how environmental degradation exacerbates infectious disease, the effects of human health on our use of the environment remains unexplored. Human illness is often tacitly assumed to reduce human impacts on the environment. By this logic, ill people reduce the time and effort that they put into extractive livelihoods and, thereby, their impact on natural resources. We followed 303 households living on Lake Victoria, Kenya over four time points to examine how illness influenced fishing. Using fixed effect conditional logit models to control for individual-level and time-invariant factors, we analyzed the effect of illness on fishing effort and methods. Illness among individuals who listed fishing as their primary occupation affected their participation in fishing. However, among active fishers, we found limited evidence that illness reduced fishing effort. Instead, ill fishers shifted their fishing methods. When ill, fishers were more likely to use methods that were illegal, destructive, and concentrated in inshore areas but required less travel and energy. Ill fishers were also less likely to fish using legal methods that are physically demanding, require travel to deep waters, and are considered more sustainable. By altering the physical capacity and outlook of fishers, human illness shifted their effort, their engagement with natural resources, and the sustainability of their actions. These findings show a previously unexplored pathway through which poor human health may negatively impact the environment.
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Jacobs, Zoe L., Fatma Jebri, Meric Srokosz, et al. "A Major Ecosystem Shift in Coastal East African Waters During the 1997/98 Super El Niño as Detected Using Remote Sensing Data." Remote Sensing 12, no. 19 (2020): 3127. http://dx.doi.org/10.3390/rs12193127.
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Under the impact of natural and anthropogenic climate variability, upwelling systems are known to change their properties leading to associated regime shifts in marine ecosystems. These often impact commercial fisheries and societies dependent on them. In a region where in situ hydrographic and biological marine data are scarce, this study uses a combination of remote sensing and ocean modelling to show how a stable seasonal upwelling off the Kenyan coast shifted into the territorial waters of neighboring Tanzania under the influence of the unique 1997/98 El Niño and positive Indian Ocean Dipole event. The formation of an anticyclonic gyre adjacent to the Kenyan/Tanzanian coast led to a reorganization of the surface currents and caused the southward migration of the Somali–Zanzibar confluence zone and is attributed to anomalous wind stress curl over the central Indian Ocean. This caused the lowest observed chlorophyll-a over the North Kenya banks (Kenya), while it reached its historical maximum off Dar Es Salaam (Tanzanian waters). We demonstrate that this situation is specific to the 1997/98 El Niño when compared with other the super El-Niño events of 1972,73, 1982–83 and 2015–16. Despite the lack of available fishery data in the region, the local ecosystem changes that the shift of this upwelling may have caused are discussed based on the literature. The likely negative impacts on local fish stocks in Kenya, affecting fishers’ livelihoods and food security, and the temporary increase in pelagic fishery species’ productivity in Tanzania are highlighted. Finally, we discuss how satellite observations may assist fisheries management bodies to anticipate low productivity periods, and mitigate their potentially negative economic impacts.
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Nunan, Fiona, Mafaniso Hara, and Paul Onyango. "Institutions and Co-Management in East African Inland and Malawi Fisheries: A Critical Perspective." World Development 70 (June 2015): 203–14. http://dx.doi.org/10.1016/j.worlddev.2015.01.009.
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Crona, B., and S. Rosendo. "Outside the law? Analyzing policy gaps in addressing fishers’ migration in East Africa." Marine Policy 35, no. 3 (2011): 379–88. http://dx.doi.org/10.1016/j.marpol.2010.11.003.
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Behmene, Ibrahim Elkhalil, Benabdallah Bachir Bouiadjra, Mohamed Daoudi, and Abdelkader Homrani. "Growth of African Catfish (Clarias gariepinus) in Illizi South-East Algeria." Journal of Aquaculture and Fish Health 10, no. 3 (2021): 312. http://dx.doi.org/10.20473/jafh.v10i3.24439.
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These observations are intended to provide information on the growth of the African catfish (Clarias gariepinus) living in the Oued Takhamalte-Illizi South-East Algerian. The basic data are the frequencies of the fish sizes resulting from the experimental fisheries carried out in October 2019 in Oued Takhamalte South-East of Algeria. The ELEFAN I program incorporated into FiSAT II software was used. The Powell-Wetherall method provides an L∞ of the order of 53.84 cm and a Z/K of 3.254 with a correlation coefficient R = - 0.944. This asymptotic length is greater than the maximum observed value (Lmax = 50 cm) and the Taylor approximation (L max/0.95 = 52.63 cm). The corresponding K value (0.28/year) seems the most suitable for the growth of a species, for this we opted for the parameters obtained by the sub-program « area of equal responses» of the program ELEFAN I (L∞ = 53 cm and K = 0.28/year) for the continuation of our study. The reduced gap test proves that there is a significant difference between the observed slope (b = 2.41) and the theoretical slope (P = 3), which makes it possible to affirm that the height-weight relationship in both sexes of C. gariepinus shows minor allometry, meaning that the weight grows slower than the cube of length.
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Ngaruiya, Christine, Mbatha Wambua, Thomas Kedera Mutua, et al. "The last frontier for global non-communicable disease action: The emergency department—A cross-sectional study from East Africa." PLOS ONE 16, no. 4 (2021): e0248709. http://dx.doi.org/10.1371/journal.pone.0248709.
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Introduction Deaths due to non-communicable diseases (NCDs) have surpassed those due to communicable diseases globally and are projected to do so in Africa by 2030. Despite demonstrated effectiveness in high-income country (HIC) settings, the ED is a primary source of NCD care that has been under-prioritized in Africa. In this study, we assess the burden of leading NCDs and NCD risk factors in Kenyan Casualty Department patients to inform interventions targeting patients with NCDs in emergency care settings. Materials and methods Using the WHO STEPwise approach to surveillance (STEPS) tool and the Personal Health Questionnaire (PHQ-9), we conducted a survey of 923 adults aged 18 and over at Kenyatta National Hospital Emergency Department (KNH ED) between May-October 2018. Age, income, household size(t-test), sex, education, marital status, work status, and poverty status (chi-squared test or fisher’s exact test) were assessed using descriptive statistics and analyzed using covariate-adjusted logistic analysis. Results Over a third of respondents had hypertension (35.8%, n = 225/628), 18.3% had raised blood sugar or diabetes (18.3%, n = 61/333), and 11.7% reported having cardiovascular disease (11.7%, n = 90/769). Having lower levels of education was associated with tobacco use (OR 6.0, 95% CI 2.808–12.618, p < 0.0001), while those with higher levels of education reported increased alcohol use (OR 0.620 (95% CI 0.386–0.994, p = 0. 0472). While a predominant proportion of respondents had had some form of screening for either hypertension (80.3%, n = 630/772), blood sugar (42.6%, n = 334/767) or cholesterol (13.9%, n = 109/766), the proportion of those on treatment was low, with the highest proportion being half of those diagnosed with hypertension reporting taking medication (51.6%, n = 116/225). Conclusions This study establishes the ED as a high-risk population with potential for high impact in East Africa, should targeted interventions be implemented. Comprehension of the unique epidemiology and characteristics of patients presenting to the ED is key to guide care in African populations.
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Beuving, J. Joost. "Playing Pool Along the Shores of Lake Victoria: Fishermen, Careers and Capital Accumulation in the Ugandan Nile Perch Business." Africa 80, no. 2 (2010): 224–48. http://dx.doi.org/10.3366/afr.2010.0203.
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The 1990s saw the emergence of a thriving Nile perch export market from East Africa. This commercial table fish species is landed by migrant fishermen at villages that have sprung up along the shores of Lake Victoria, and then exported to overseas markets. By analysing the Ugandan perch fishery as a set of careers, the article shows that, although some fishermen have benefited from the perch boom, most face an uncertain and marginal existence. Few of them, however, move away in response. Analysis of an anthropological case study reveals that this is because the fishermen value the urban culture characterizing prominent village landings, expressed in particular clothing and hairstyles, the prevalence of non-kin ties, and a prospering leisure industry epitomized by the proliferation of pool tables. Hence, a cultural preference for life at the landings, rather than a universal quest for economic opportunity, drives their economic decision making.
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Congar, Richard. "La consolidation de l’Europe bleue : nouveau contexte international et nouveaux enjeux." Études internationales 18, no. 1 (2005): 21–69. http://dx.doi.org/10.7202/702126ar.
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Each of the member states of the European Economic Community (EEC) has extended, through a common agreement, its own fishing grounds to 200 miles, thus leading to the creation, since 1977, of the Community waters whose exploitation would be subjected to the common fisheries policy of the EEC. The widespread extension of fishing grounds throughout Europe together with the state of overfishing in the North-East Atlantic have led the EEC to elaborate a policy in order to protect the interests of its member states, to make their fishing vessels competitive, and to ensure the stability of the fishing industry. This paper looks into the implementation of the fisheries policy of the EEC, internally — namely access s rights to Community waters, the coordination of markets and producers, aid to modernize the vessels - as well as regarding foreign countries with whom agreements are sought in order to maintain historic fishing rights - specially in the North Atlantic - or in order to develop new fishing grounds - specially along the West African coast and in the Indian Ocean - a quarter of the EEC catch is made outside Community waters. France is deeply committed to the orientations of the EEC fisheries policy due to the importance of its fleet of trawlers fishing outside French waters and to the potential catch in the exclusive economic zone of its departments and territories overseas. The compromise signed by member states in 1983 is an important step towards the establishment of a true « Europe Fisheries ».
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Holmwood, Frederic. "On the Employment of the Remora by Native Fishermen on the East Coast of Africa." Proceedings of the Zoological Society of London 52, no. 3 (2009): 411–13. http://dx.doi.org/10.1111/j.1096-3642.1884.tb02848.x.
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Rumisha, Cyrus, Filip Huyghe, Diary Rapanoel, Nemo Mascaux, and Marc Kochzius. "Genetic diversity and connectivity in the East African giant mud crab Scylla serrata: Implications for fisheries management." PLOS ONE 12, no. 10 (2017): e0186817. http://dx.doi.org/10.1371/journal.pone.0186817.
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Almagor, Uri. "The Cycle and Stagnation of Smells: Pastoralists-Fishermen Relationships in an East African Society." Res: Anthropology and Aesthetics 13 (March 1987): 106–21. http://dx.doi.org/10.1086/resv13n1ms20166765.
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CINNER, J. E. "Poverty and the use of destructive fishing gear near east African marine protected areas." Environmental Conservation 36, no. 4 (2009): 321–26. http://dx.doi.org/10.1017/s0376892910000123.
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SUMMARYPoverty may be an important influence on the exploitation of marine resources in tropical developing countries. A number of studies have hypothesized that destructive fishing gears, which can degrade habitat, capture high proportions of juvenile fish and ultimately lead to reduced yields, are primarily used by the poorer segments of society. However, few studies have empirically tested this relationship. This paper examines relationships between the use of destructive seine nets and thirteen socioeconomic conditions in communities adjacent to three peri-urban marine protected areas in east Africa. Fishers using destructive gears were younger, less likely to have capital invested in the fishery, had lower fortnightly expenditures and were poorer in two multivariate indices of material style of life. Based on the two multivariate material style of life indices, a binary logistic regression model classified whether fishers used destructive gears with almost 70% accuracy. These findings are broadly consistent with the literature on poverty traps, which are situations in which the poor are unable to mobilize the resources required to overcome low-income situations and consequently engage in behaviour that may reinforce their own poverty. Managers aiming to reduce destructive gear use may need to partner with civil society and donors to help break poverty traps.
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Waniha, Pascal F., Rita D. Roberts, James W. Wilson, Agnes Kijazi, and Benedicto Katole. "Dual-Polarization Radar Observations of Deep Convection over Lake Victoria Basin in East Africa." Atmosphere 10, no. 11 (2019): 706. http://dx.doi.org/10.3390/atmos10110706.
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Lake Victoria in East Africa supports the livelihood of thousands of fishermen and it is estimated that 3000–5000 human deaths occur per year over the lake. It is hypothesized that most of these fatalities are due to localized, severe winds produced by intense thunderstorms over the lake during the rainy season and larger scale, intense winds over the lake during the dry season. The intense winds produce a rough state of the lake (big wave heights) that cause fishing boats to capsize. In this region, weather radars have never been a primary tool for monitoring and nowcasting high impact weather. The Tanzania Meteorological Agency operates an S-band polarimetric radar in Mwanza, Tanzania, along the south shore of Lake Victoria. This radar collects high temporal and spatial resolution data that is now being used to detect and monitor the formation of deep convection over the lake and improve scientific understanding of storm dynamics and intensification. Nocturnal thunderstorms and convection initiation over the lake are well observed by the Mwanza radar and are strongly forced by lake and land breezes and gust fronts. Unexpected is the detection of clear air echo to ranges ≥100 km over the lake that makes it possible to observe low-level winds, gust fronts, and other convergence lines near the surface of the lake. The frequent observation of extensive clear air and low-level convergence lines opens up the opportunity to nowcast strong winds, convection initiation, and subsequent thunderstorm development and incorporate this information into a regional early warning system proposed for Lake Victoria Basin (LVB). Two weather events are presented illustrating distinctly different nocturnal convection initiation over the lake that evolve into intense morning thunderstorms. The evolution of these severe weather events was possible because of the Mwanza radar observations; satellite imagery alone was insufficient to provide prediction of storm initiation, growth, movement, and decay.
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Sobania, Neal. "Fishermen Herders: Subsistence, Survival and Cultural Change in Northern Kenya." Journal of African History 29, no. 1 (1988): 41–56. http://dx.doi.org/10.1017/s0021853700035982.
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This article examines the unique role played by fishing, hunting and gathering groups in the survival strategy of the pastoralist societies in whose midst they live. During periods of extreme adversity, these groups acted as a refuge for destitute herdsmen and their households by absorbing population in periods of hardship and releasing individuals back into pastoralism when conditions once again allowed the accumulation of stock. Extensive quotations from the historical traditions of the peoples of the Lake Turkana region of northern Kenya are used to detail the recent history of two such fishing communities, the Elmolo and the Dies, the latter being a fishing group within Dasenech society. The epizootics that decimated the cattle herds of East Africa at the end of the nineteenth century are background for examining the interactions of the Elmolo and Dies with their pastoralist neighbours, the Samburu and Rendille, and the cultural changes initiated during this period. The subsequent changes inaugurated by the imposition of colonial rule are documented and the Elmolo are shown to be a ‘dying tribe’ in the sense that the traditional cultural features of their society are giving way to a more pastoral existence based on that of their herding neighbours.
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Manyilizu, Majuto, Philip Sagero, Issufo Halo, and Shigalla B. Mahongo. "A comparative study of ocean surface interannual variability in Northern Tanzania and the Northern Kenya Bank." Western Indian Ocean Journal of Marine Science, no. 1/2020 (February 11, 2021): 1–8. http://dx.doi.org/10.4314/wiojms.si2020.1.1.
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The livelihoods of most residents of Tanga (Northern Tanzania) and Malindi (Northern Kenya), rely strongly on fishing activities in the East African shelf region. Thus, understanding variations in sea surface temperature (SST) and its related parameters such as thermocline depths and upper ocean circulation are crucial. This study applies a regional model to understand interannual spatial relationships between ocean circulation and SST off Northern Tanzania and on the Northern Kenya Bank. The results indicate slight differences in variations off the Northern Tanzanian shelf region and the Northern Kenya Bank. Such small variations might have local impacts on the human population through influencing primary productivity and fisheries. The coastal waters off Malindi indicate stronger variations, particularly in 1997 (cold SST) and 1998 (warm SST), than those off Tanga region. The SST anomalies seem to be associated with thermocline and sea surface height (SSH) off Malindi, while off Tanga they relate only to SSH. This information provides further understanding of parameters that may affect fishing activities in these regions and can be used for planning and management processes.
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Osho, Friday Elijah, and Ridwan Abiola Usman. "Length-Weight Relationship, Condition Factor and Fecundity of African Snakehead Parachanna obscura from the Anambra River, South East Nigeria." Croatian Journal of Fisheries 77, no. 2 (2019): 99–105. http://dx.doi.org/10.2478/cjf-2019-0011.
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Abstract The length-weight relationship, condition factor, fecundity, gonadosomatic and hepatosomatic indices of Parachanna obscura from the Anambra River were determined between December 2015 and June 2016. Eighty-three live samples of P. obscura were obtained from fishermen. Descriptive statistics, correlation and regression analysis were used to analyze the obtained data. The length-weight relationship had R values of 0.933, 0.843 and 0.896 for male, female and combined sexes, respectively. The b value of 3.133 for male and 2.674 for female were not significantly different (P>0.05). Mean condition factors of 0.89±0.33 and 0.80±0.21 were obtained for female and male, respectively. The largest number of eggs (10,965) was found in a female with the body weight of 154 g, gonad weight of 9.1 g and egg size of 1.3 mm, while the least fecund female with 1820 eggs weighed (94 g) and had a gonad weight 2.1 g with egg size of 1.0 mm. The hepatosomatic indices ranged between 0.55±0.20 and 0.64±0.29 in both male and female, respectively, while female gonadosomatic index average was 2.05±1.44. There was a positive correlation between fecundity and gonad weight.
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Ochiewo, Jacob, Fridah Munyi, Edward Waiyaki, et al. "Livelihood impacts and adaptation in fishing practices as a response to recent climatic changes in the upwelling region of the East African Coastal Current." Western Indian Ocean Journal of Marine Science, no. 1/2020 (February 11, 2021): 105–25. http://dx.doi.org/10.4314/wiojms.si2020.1.10.
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A socio-economic assessment was carried out at Amu and Shela in Lamu County and Ngomeni in Kilifi County on the coast of Kenya. The aim was to establish fisher perspectives on the livelihood impacts of changes in upwelling associated with the East African Coastal Current, and adaptations in fishing practices to determine the vulnerability, resilience and adaptation options for fisheries dependent communities in this upwelling region. Primary data and information were collected through direct observation, semi-structured interviews, key informant interviews and oral histories. Descriptive and non-parametric analysis was conducted for quantitative data and content analysis for qualitative data. The study covered 92 respondents out of which 90 were male. About 82.5 percent of the respondents had attained different levels of primary school education and below, and were therefore highly vulnerable to climate change impacts. Furthermore, 80.4 percent of the respondents were aged between 20 years and 49 years with a mean age of 40 years, thus falling into the economically active age category. In terms of livelihoods, fishing and fishing-related activities formed the primary livelihoods at the three study sites with fishing being the main occupation for 93 percent of the respondents. Fishing effort was higher during the north-east monsoon season. Fifty two percent of the respondents targeted small pelagic species. The main changes observed included increased fishing effort and a decline in the quantity of fish caught per fisher, and changes in the composition of fish species. Changes in the composition of fish species have further been compounded by a decline in rainfall over time, sea level rise, irregular wind patterns and increased temperatures. The decline in fish catch further led to a general decline in income and welfare. The climatic changes increased vulnerability of the fishing communities.
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Twesigye, C. K., S. Nyakaana, and W. Byarugaba. "Population Genetics of the Nile tilapia (Oreochromis niloticus) from East African Lakes and its Implications for Capture and Culture Fisheries in the Nile Basin Region." Journal of Biotechnology 150 (November 2010): 4. http://dx.doi.org/10.1016/j.jbiotec.2010.08.025.
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Lalith Perera. "Coconut Palms on the Edge of the Desert: Genetic Diversity of Cocos nucifera L. in Oman." CORD 27, no. 1 (2011): 11. http://dx.doi.org/10.37833/cord.v27i1.120.
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In the Gulf region, coconuts are almost exclusively produced from palms growing in the Sultanate of Oman, particularly in the extreme south-eastern coastal plain of the Dhofar Governorate, and specifically within the city limits of Salalah, between the Jebel and the sea. The importance of these coconuts is not only agricultural; historically, the Dhofar palms provided the basic materials to build boats for fishermen and traders on, around and eventually beyond the Indian Ocean. Coconut palms are now one of the main symbols of Salalah city and play a role in both the tourist industry and urban landscaping. In early 2009, twenty-nine sites, representing Oman coconuts on beaches and cultivated lands were chosen from the Dhofar region. COGENT descriptors and DNA analysis were used for the purpose of identifying coconut germplasm available in Oman. The presence was confirmed of varieties that were imported during the 1980s, such as Yellow Dwarf, Green Dwarf and King coconut from Sri Lanka, as well as Malayan Yellow Dwarf and F1 hybrids. The local Oman Tall has the same phenotypic characteristics as other coconuts of South Asia, East and West Africa, the Caribbean and the Atlantic coast of South America. Microsatellite markers, however, reveal a substantial genetic contribution of the South-East Asian coconuts, at levels that are comparable to those found in the Comoros and Madagascar coconuts. Hypotheses about the ancestry of the Oman Tall coconuts are discussed; two genepools are indicated, consecutively involving natural selection, dissemination by floating, domestic selection and dispersal by boat.
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Arinze Anthony Onwuegbuna, Akunne Ijeoma Apakama, Chuka Michael Okosa, et al. "Seroprevalence of HIV infection among cataract surgery patients in south-east Nigeria: A retrospective cross-sectional study." Magna Scientia Advanced Biology and Pharmacy 3, no. 2 (2021): 001–8. http://dx.doi.org/10.30574/msabp.2021.3.2.0039.
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Background: Human Immunodeficiency Virus remains an important cause of morbidity and mortality especially in sub-Saharan Africa. Despite the availability of highly active antiretroviral therapy, many people with this disease still present with its ocular complications. Cataracts remain the commonest reason for blindness in Nigeria and globally. The prevalence of HIV infection among cataract patients in south east Nigeria has remained unknown. Objectives: To determine the prevalence of human immunodeficiency virus among cataract patients in south east Nigeria. Materials and Methods: This was a retrospective cross-sectional study. The case files of all who had cataract surgery between September 1st, 2020 to March 31st, 2021 at City of Refuge Specialist Eye Clinic Onitsha, Nigeria was obtained from the Medical Record Department of the hospital to extract relevant information and demographic data. The outcome measures included the prevalence of HIV, as well as the gender and the age of affected cataract patients. Data was analyzed using SPSS 26.0 IBM Corporation. Fisher’s exact test was performed for categorical data, and Student’s t-test was applied to continuous variables depending on their distribution. A p value of <0.05 was considered statistically significant. Results: In this study, 423 participants who underwent cataract surgery were included for analysis of which 16 were HIV positive. The overall seroprevalence of HIV among the study population was 3.78% with HIV prevalence showing the female to male ratio of 1:1. Up to 70.81% of the patients were at least 60 years of age. Although there was a statistically significant difference between the prevalence of HIV and seasonal presentation (p=0.015), there was no statistically significant relationship between the participants age and gender (p=0.195), prevalence of HIV and the participants’ age categories (p=0.149) or participants’ settlements (p=0.219). Conclusion: The prevalence of HIV among cataract patients in this study was 3.78%. This study confirms that HIV infections are an important public problem among cataract patients in Nigeria. Our findings draw attention to the significant burden HIV has on cataract surgery in Nigeria. We recommend advocacy for the national policymakers to initiate HIV tests in routine ophthalmology services.
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Woodhams, Beth J., Cathryn E. Birch, John H. Marsham, Todd P. Lane, Caroline L. Bain, and Stuart Webster. "Identifying Key Controls on Storm Formation over the Lake Victoria Basin." Monthly Weather Review 147, no. 9 (2019): 3365–90. http://dx.doi.org/10.1175/mwr-d-19-0069.1.
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Abstract The Lake Victoria region in East Africa is a hot spot for intense convective storms that are responsible for the deaths of thousands of fishermen each year. The processes responsible for the initiation, development, and propagation of the storms are poorly understood and forecast skill is limited. Key processes for the life cycle of two storms are investigated using Met Office Unified Model convection-permitting simulations with 1.5 km horizontal grid spacing. The two cases are analyzed alongside a simulation of a period with no storms to assess the roles of the lake–land breeze, downslope mountain winds, prevailing large-scale winds, and moisture availability. While seasonal changes in large-scale moisture availability play a key role in storm development, the lake–land-breeze circulation is a major control on the initiation location, timing, and propagation of convection. In the dry season, opposing offshore winds form a bulge of moist air above the lake surface overnight that extends from the surface to ~1.5 km and may trigger storms in high CAPE/low CIN environments. Such a feature has not been explicitly observed or modeled in previous literature. Storms over land on the preceding day are shown to alter the local atmospheric moisture and circulation to promote storm formation over the lake. The variety of initiation processes and differing characteristics of just two storms analyzed here show that the mean diurnal cycle over Lake Victoria alone is inadequate to fully understand storm formation. Knowledge of daily changes in local-scale moisture variability and circulations are keys for skillful forecasts over the lake.
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Maung, Htet Myat Win, Prasit Palittapongarnpim, Htin Lin Aung, Komwit Surachat, Wint Wint Nyunt, and Virasakdi Chongsuvivatwong. "Geno-Spatial Distribution of Mycobacterium Tuberculosis and Drug Resistance Profiles in Myanmar–Thai Border Area." Tropical Medicine and Infectious Disease 5, no. 4 (2020): 153. http://dx.doi.org/10.3390/tropicalmed5040153.
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Worldwide, studies investigating the relationship between the lineage of Mycobacterium tuberculosis (MTB) across geographic areas has empowered the “End TB” program and understand transmission across national boundaries. Genomic diversity of MTB varies with geographical locations and ethnicity. Genomic diversity can also affect the emergence of drug resistance. In Myanmar, we still have limited genetic information about geographical, ethnicity, and drug resistance linkage to MTB genetic information. This study aimed to describe the geno-spatial distribution of MTB and drug resistance profiles in Myanmar–Thailand border areas. A cross-sectional study was conducted with a total of 109 sequenced isolates. The lineages of MTB and the potential associated socio-demographic, geographic and clinical factors were analyzed using Fisher’s exact tests. p value of statistically significance was set at < 0.05. We found that 67% of the isolates were lineage 1 (L1)/East-African-Indian (EAI) (n = 73), followed by lineage 2 (L2)/Beijing (n = 26), lineage 4 (L4)/European American (n = 6) and lineage 3 (L3)/Delhi/Central Asian (n = 4). “Gender”, “type of TB patient”, “sputum smear grading” and “streptomycin resistance” were significantly different with the lineages of MTB. Sublineages of L1, which had never been reported elsewhere in Myanmar, were detected in this study area. Moreover, both ethnicity and lineage of MTB significantly differed in distribution by patient location. Diversity of the lineage of MTB and detection of new sublineages suggested that this small area had been resided by a heterogeneous population group who actively transmitted the disease. This information on distribution of lineage of MTB can be linked in the future with those on the other side of the border to evaluate cross-border transmission.
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Abbas, Abbas. "Description of the American Community of John Steinbeck’s Adventure in Novel Travels with Charley in Search of America 1960s." PIONEER: Journal of Language and Literature 12, no. 2 (2020): 173. http://dx.doi.org/10.36841/pioneer.v12i2.738.
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This article aims at describing the social life of the American people in several places that made the adventures of John Steinbeck as the author of the novel Travels with Charley in Search of America around the 1960s. American people’s lives are a part of world civilizations that literary readers need to know. This adventure was preceded by an author’s trip in New York City, then to California, Connecticut, Rhode Island, New Hampshire, Massachusetts, Maine, New Jersey, Saint Lawrence, Quebec, Niagara Falls, Ohio, Chicago, Illinois, Michigan, North Dakota, the Rocky Mountains, Washington, the West Coast, Oregon, Arizona, New Mexico, Texas, New Orleans, Salinas, and again ended in New York. In processing research data, the writer uses one of the methods of literary research, namely the Dynamic Structural Approach which emphasizes the study of the intrinsic elements of literary work and the involvement of the author in his work. The intrinsic elements emphasized in this study are the physical and social settings. The research data were obtained from the results of a literature study which were then explained descriptively. The writer found a number of descriptions of the social life of the American people in the 1960s, namely the life of the city, the situation of the inland people, and ethnic discrimination. The people of the city are busy taking care of their profession and competing for careers, inland people living naturally without competing ambitions, and black African Americans have not enjoyed the progress achieved by the Americans. The description of American society related to the fictional story is divided by region, namely east, north, middle, west, and south. The social condition in the eastern region is dominated by beaches and mountains, and is engaged in business, commerce, industry, and agriculture. The comfortable landscape in the northern region spends the people time as breeders and farmers. The natural condition in the middle region of American is very suitable for agriculture, plantations, and animal husbandry. Many people in the western American region facing the Pacific Ocean become fishermen. The natural conditions from the plains and valleys to the hills make the southern region suitable for plantation land.
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Moore, Jay A., Andrew M. Evens, Justin Newberg, et al. "Genomic Ancestry in B Cell Lymphoid Malignancies." Blood 136, Supplement 1 (2020): 5–6. http://dx.doi.org/10.1182/blood-2020-137533.
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Introduction: B cell lymphoma/leukemias (BCL) are a diverse set of malignancies. The genomic landscape of many BCL subtypes have been described. However, genomic ancestry has rarely been investigated. We applied SNP-based genomic ancestry prediction to comprehensive genomic profiling (CGP) data to identify significant enrichment of ancestry by subtype. We also explored enrichment of genomic alterations (GAs) by ancestry. Methods: During routine clinical care, 2834 unique patient (pt) samples of BCLs underwent CGP for 406 DNA genes and 265 RNA genes to detect all classes of GAs on the FoundationOne® Heme platform. This dataset was enriched for relapsed/refractory pts as they are more likely to have genomic testing as part of clinical care (referral bias). Each pt was assigned an ancestry of American (AMR), African (AFR), East Asian (EAS), European (EUR), or South Asian (SAS) using a SNP-based machine learning methodology (J. Newberg et al., AACR 2019). AMR was defined using a mix of Hispanic and Latin American populations. Enrichment analyses were performed using Fisher's exact test with FDR correction. Results: We compared the ancestry composition of each BCL subtype to the overall ancestry composition of the rest of the sample set (Fig 1A). Pts of AFR ancestry were overrepresented in plasmablastic lymphoma (PBL) (OR=7.2, P&lt;0.05); EAS pts were overrepresented in Burkitt lymphoma (BL) (OR=4.99, P&lt;0.05); and AMR pts were overrepresented in acute B-cell lymphoblastic leukemia/lymphoma (B-ALL) (OR=3.2, P&lt;0.001). AMR SNPs have been associated with increased risk of B-ALL and worse prognosis (PMID: 21297632). We also investigated GAs enriched in specific ancestries. B-ALL AMR pts were enriched for GAs in IL7R, IGH, CRLF2, JAK2, and IKZF1 compared to other ancestries in B-ALL (Fig 1B). These genes were associated with the high-risk Philadelphia chromosome-like ALL (Ph-like ALL) molecular subtype of B-ALL (PMID: 30181314). We found 33% of all B-ALL contained GAs consistent with Ph-like ALL (PMID: 30181314). While we noted enrichment of AMR pts in the overall B-ALL cohort, we identified additional enrichment in the Ph-like B-ALL cohort with 47% of Ph-like B-ALL pts being of AMR ancestry (OR=1.85, p&lt;0.001). AMR pts accounted for almost half the Ph-ALL pts in this cohort; however, even in B-ALL pts without Ph-like genomic features, 32% were of AMR ancestry suggesting this enrichment is not simply due to increased CGP testing in Ph-ALL. In diffuse large B cell lymphoma (DLBCL), we found pts to be primarily of EUR ancestry, however we identified ancestry bias in GAs (Fig 1C). CD79B alterations were enriched in DLBCL pts of SAS ancestry, although not significant after FDR correction, consistent with previous reports of increased Activate B-Cell (ABC) cell of origin (COO) subtype and BTK signaling in pts from South East Asia (PMID: 31189540). CDKN2A, also frequently altered in ABC COO subtype, trended towards enrichment in EAS ancestry. CUX1, a tumor suppressor involved in PI3K signaling, was strongly enriched in AFR pts in both DLBCL and B-ALL. One CUX1 insertion variant (G870_G871insSGG) was particularly common in AFR pts with BCL (7/9 AFR, 2/9 AMR), which has been reported previously in Myelodysplastic syndromes (PMID: 24030381). CUX1 alterations have been reported to be associated with increased PI3K signaling suggesting in part PI3K inhibitor trials should proactively include pts of AFR ancestry (PMID: 24316979). Finally, EZH2 alterations were slightly enriched in AMR DLBCL pts, but showed no ancestry bias in follicular lymphoma (FL) pts, of interest given the recent EZH2 inhibitor approval in FL. Conclusions: This study described multiple important genomic differences in BCL using genomic ancestry rather than patient-reported descriptive variables. Enrichment of AMR ancestry was observed in B-ALL overall, and in Ph-like B-ALL. In addition, enrichment of CUX1 alterations was observed in both DLBCL and B-ALL of AFR ancestry. While precision medicine holds the promise to advance cancer care, many acknowledge the potential to unintentionally deepen existing health disparities (PMID: 31112478). Further analysis of ancestry informative markers in BCL, including enrichment of ancestry markers in specific cancer subtypes and ancestry-associated enrichment of specific GAs, may lead to insights into cancer biology and contribute to ongoing cancer health disparities research. Disclosures Moore: Foundation Medicine, Inc: Current Employment; Roche Holdings: Current equity holder in publicly-traded company. Evens:Abbvie: Consultancy, Honoraria; Mylteni: Consultancy, Honoraria; Research To Practice: Honoraria, Speakers Bureau; MorphoSys: Consultancy, Honoraria; Novartis: Consultancy, Honoraria; Pharmacyclics: Consultancy, Honoraria; Merck: Consultancy, Honoraria, Research Funding; Epizyme: Consultancy, Honoraria, Research Funding; Seattle Genetics: Consultancy, Honoraria, Research Funding. Newberg:Roche Holdings: Current equity holder in publicly-traded company; Foundation Medicine, Inc: Current Employment. Severson:Foundation Medicine, Inc: Current Employment; Roche Holdings: Current equity holder in publicly-traded company. Mills:Foundation Medicine, Inc: Current Employment; Abbvie: Current equity holder in publicly-traded company; Roche Holdings: Current equity holder in publicly-traded company; Abbott: Current equity holder in publicly-traded company; Merck: Current equity holder in publicly-traded company. Vergilio:Roche Holdings: Current equity holder in publicly-traded company; Foundation Medicine, Inc: Current Employment. Trabucco:F. Hoffmann-La Roche, Bristol-Myers Squibb Co., BioNTech: Current equity holder in publicly-traded company; Patent pending with Foundation Medicine and Genentech: Patents & Royalties: Patent pending; Foundation Medicine, Inc.: Current Employment; Bristol-Myers Squibb Co: Current equity holder in publicly-traded company; BioNTech: Current equity holder in publicly-traded company; Loxo Oncology: Divested equity in a private or publicly-traded company in the past 24 months. Ganesan:M2GEN: Research Funding; Foundation Medicine, Inc: Consultancy; Inspirata: Consultancy; Merck: Consultancy, Current Employment, Current equity holder in publicly-traded company; Silagene: Consultancy; Foghorn Therapeutics: Consultancy; Roche: Consultancy; Novartis: Consultancy.
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Sadler, J. Evan, Joshua Muia, Leili Dolatshahi, et al. "Efficacy of Adjuvant Low Dose Rituximab and Plasma Exchange for Acquired TTP with Severe ADAMTS13 Deficiency — Results of the ART Study." Blood 132, Supplement 1 (2018): 374. http://dx.doi.org/10.1182/blood-2018-99-113677.
Full textAbstract:
Abstract Introduction:Acquired thrombotic thrombocytopenic purpura (TTP) is caused by autoantibodies against ADAMTS13 that prevent the cleavage of von Willebrand factor and allow the growth of microvascular thrombi, causing microangiopathic hemolysis and severe thrombocytopenia. Untreated TTP is almost always fatal but plasma exchange enables ~80% of patients to survive. Those who respond often have exacerbations or relapses that require more therapy. Exacerbations and refractory TTP usually can be treated effectively by combining plasma exchange, corticosteroids, and rituximab. A typical regimen for TTP is 4 weekly doses of rituximab 375 mg/m2, which is borrowed from protocols for B cell lymphomas. However, the pathogenic B cell mass in TTP is much less than in lymphoma and lower doses of rituximab may be enough. For example, case reports in TTP and studies in immune thrombocytopenia suggest that fixed doses of 100 mg and conventional doses of 375 mg/m2 have similar efficacy. Methods:The ART study (Adjuvant Rituximab in TTP, NCT01554514) was designed as a pilot safety/efficacy study of low dose rituximab (100 mg/week x 4 doses) plus standard plasma exchange and corticosteroids for TTP. The study enrolled at Washington University, Beth-Israel Deaconess Medical Center, Emory University, and Duke University. Eligibility criteria include age ≥18 years with acute TTP and ADAMTS13 <10%. Exclusions include treatment for TTP within 2 months, severe infection, cancer, organ or stem cell transplant, pregnancy, hepatitis B, and use of calcineurin inhibitors within 6 months or rituximab within the past year. Treatment included daily 1.5 volume plasma exchanges, prednisone 1 mg/kg, and rituximab 100 mg weekly for 4 doses starting before the 5thplasma exchange. Treatment Response is defined as 2 consecutive days with a platelet count ≥150,000/µl. A Durable Treatment Response persists ≥30 days after stopping plasma exchange. The primary endpoint is a composite of Exacerbation or Refractory TTP, where Exacerbation is recurrence of TTP ≤30 days after a treatment response and Refractory TTP is failure to achieve a Treatment Response by day 28 or failure to achieve a Durable Treatment Response by day 60.Secondary endpoints include the relapse rate at 2 years. Results:19 patients were enrolled. Two patients were subsequently excluded: 1 proved to have congenital TTP and was ineligible, 1 was withdrawn for protocol violations during the first week. The 17 evaluable patients have a median age of 48 years (range 30-71), 14 (82%) are African-American and 11 (65%) are female. All had a treatment response in a median of 5 days (range 3-16 days). 13 patients achieved normal ADAMTS13 levels after treatment, 2 had persistent severe ADAMTS13 deficiency, and 2 patients have yet to be assessed for ADAMTS13 responses. No patients had refractory disease and 2 had exacerbations; both achieved Durable Treatment Responses after 29 and 35 days. No patient died of TTP; 1 patient died of metastatic cancer. To date, 13 patients have completed 2 years of follow up and 3 (23%)have relapsed at 11, 19, and 22 months. For comparison, among 54 episodes of TTP at Washington University treated without rituximab, the primary endpoint occurred in 26 (48%). These included exacerbation in 23 (43%), refractory disease in 9 (17%), and both in 6 (11%). 6 patients died, and the incidence of relapse within 2 years was 51%. Treatment with low dose rituximab (100 mg) was associated with a significant decrease in the primary endpoint from 48% to 12% (P= 0.01, Fisher's exact test) and an encouraging decrease in 2-year relapse rate from 51% to 23% (P= 0.06). Conclusions:These results with low dose rituximab (100 mg x 4 doses) are consistent with reports that immediate treatment of TTP with standard dose rituximab (375 mg/m2x 4 doses) reduces the incidence of exacerbation and refractory disease, and prevents or delays relapses. A direct comparison of these regimens would be useful to establish whether low dose rituximab has similar efficacy with greater ease of administration, less cost, and less risk of infusion reactions and late complications. Disclosures Sadler: Ablynx: Consultancy. Zwicker:Quercegen: Research Funding; Daiichi: Honoraria; Parexel: Consultancy; Incyte: Research Funding.