Greetings, I am Masumbuko Semba, a skilled data scientist specializing in spatial analysis and oceanography. Leveraging my programming expertise, I have developed a diverse range of tools, algorithms, and analytical workflows that streamline the organization, management, analysis, and modeling of data. Furthermore, I possess proficiency in various programming languages such as – MATLAB, Python, Observable JavaScript, and R. By harnessing these languages, I am able to automate data processing and analysis tasks, as well as generate comprehensive reports in formats such as PDF or HTML documents. Notably, the scripts and tools I create ensure the reproducibility of data analysis workflows, bolstering informed decision-making processes. I take pride in openly sharing my code and work on platforms such as my blog, website and github accounts, allowing the public to freely access and utilize these resources.

Peer Review Articles

  1. Silas, M. O., Kishe, M. A., Semba, M. R., Kuboja, B. N., Ngatunga, B., Mgeleka, S. S., … & Gullström, M. (2023). Seascape configuration influences big blue octopus (Octopus cyanea) catches: Implications for a sustainable fishery. Fisheries Research, 264, 106716.

  2. Silas, M. O., Semba, M. R., Mgeleka, S. S., Van Well, L., Linderholm, H. W., & Gullström, M. (2023). Using fishers’ local ecological knowledge for management of small-scale fisheries in data-poor regions: Comparing seasonal interview and field observation records in East Africa. Fisheries Research, 264, 106721

  3. Lugendo, B. R., Igulu, M. M., Semba, M. L., & Kimirei, I. A. (2022). Caudal fin as a proxy for dorsal muscle for nutrient enrichment monitoring using stable isotope analysis: the case of Gerres filamentosus and G. oyena from mangrove creeks of Tanzania. Western Indian Ocean Journal of Marine Science, 21(2), 71-81.

  4. Silas, M. O., Semba, M. L., Mgeleka, S., Linderholm, H. W., & Gullström, M. (2022). Fishers’ ecological knowledge for management in data-poor fisheries: a case of East African small-scale fisheries in a changing climate.

  5. Silas, M. O., Kishe, M. A., Mshana, J. G., Semba, M. L., Mgeleka, S. S., Kuboja, B. N., … & Matiku, P. (2021). Growth, mortality, exploitation rate and recruitment pattern of Octopus cyanea (Mollusca: Cephalopoda) in the WIO region: A case study from the Mafia Archipelago, Tanzania. Western Indian Ocean Journal of Marine Science, 20(1), 71-79.

  6. Peter, N., Semba, M., Lugomela, C., & Kyewalyanga, M. (2021). Seasonal variability of vertical patterns in chlorophyll-a fluorescence in the coastal waters off Kimbiji, Tanzania. Western Indian Ocean Journal of Marine Science, 20(1), 21-33.

  7. Kyewalyanga, M. S., Peter, N., Semba, M., & Mahongo, S. B. (2020). Coastal upwelling and seasonal variation in phytoplankton biomass in the Pemba Channel. Western Indian Ocean Journal of Marine Science, (1/2020), 19-32.

  8. Semba, M., Lumpkin, R., Kimirei, I., Shaghude, Y., & Nyandwi, N. (2019). Seasonal and spatial variation of surface current in the Pemba Channel, Tanzania. PloS one, 14(1), e0210303

  9. Peter, N., Semba, M., Lugomela, C., & Kyewalyanga, M. S. (2018). The influence of physical-chemical variables on the spatial and seasonal variation of Chlorophyll-a in coastal waters of Unguja, Zanzibar, Tanzania. Western Indian Ocean Journal of Marine Science, 17(2), 25-34

  10. Semba, M., Kimirei, I., Kyewalyanga, M., Peter, N., Brendonck, L., & Somers, B. (2016). The decline in phytoplankton biomass and prawn catches in the Rufiji-Mafia Channel, Tanzania. Western Indian Ocean Journal of Marine Science, 15(1), 15-29.

  11. Crawford, B., Herrera, M. D., Hernandez, N., Leclair, C. R., Jiddawi, N., Masumbuko, S., & Haws, M. (2010). Small scale fisheries management: lessons from cockle harvesters in Nicaragua and Tanzania. Coastal Management, 38(3), 195-215.

Book chapters

  1. Kimirei, I. A., Igulu, M. M., Semba, M., & Lugendo, B. R. (2016). Small estuarine and non-estuarine mangrove ecosystems of Tanzania: overlooked coastal habitats?. Estuaries: A Lifeline of Ecosystem Services in the Western Indian Ocean, 209-226.

  2. Kimirei, I. A., Semba, M., Mwakosya, C., Mgaya, Y. D., & Mahongo, S. B. (2017). Environmental Changes in the Tanzanian Part of Lake Victoria. Lake Victoria fisheries resources: Research and management in Tanzania, 37-59.

  3. Mahatane, A., Mgaya, Y. D., Hoza, R. B., Onyango, P. O., & Semba, M. (2017). Co-management of Lake Victoria Fisheries. Lake Victoria Fisheries Resources: Research and Management in Tanzania, 219-239.

  4. Sobo, F., Mgaya, Y. D., Kayanda, R. J., & Semba, M. (2017). Fisheries Statistics for Lake Victoria, Tanzania. Lake Victoria Fisheries Resources: Research and Management in Tanzania, 241-253.

  5. Semba, M., Ndebele-Murisa, M., Mubaya, C. P., Kimirei, I. A., Chavula, G., Mwedzi, T., … & Zenda, S. (2021). Historical and Future Climate Scenarios of the Zambezi River Basin. Ecological Changes in the Zambezi River Basin, 115.

  6. Ndebele-Murisa, M., Kimirei, I. A., Mubaya, C. P., Chavula, G., Mwedzi, T., Mutimukuru-Maravanyika, T., & Semba, M. (2021). A Review of the Comparative Research Method. Ecological Changes in the Zambezi River Basin, 15.

  7. Ndebele-Murisa, M. (Ed.). (2021). Ecological Changes in the Zambezi River Basin. African Books Collective.

  8. Mgaya, Y. D., & Mahongo, S. B. (2017). Lake victoria fisheries resources. Springer.

Digital books

  1. Semba M (2021). Practical Spatial Data Coastal and Marine Environment in R

  2. Semba M, Peter N. & I. Kimirei (2020). Developing packages in R

  3. Semba M. (2018). A gentle Introduction of Coding with R

  4. Semba M., Silas M., Matiku P., & Chande M. (2019) Spatial distribution of octopus fishery in Kilwa District

  5. Semba M. (2018). Putting fishing landing sites and their instranstructure on spatial aspect

  6. Semba M. (2023). Fisheries Data Management in Modern R and Excel. Manual with Applications in the Western Indian Ocean Region]. Food and Agriculture Organization and the Western Indian Ocean Marine Science Association

Interactive Apps

  1. Kwala Commercial and Investment City

  2. The Exclusive Economic Zone Tool

  3. The Pemba Channel Hydrographic Hub

  4. The coastal and Marine Data Visualization tool

  5. The National Environmenal Master Plan

  6. The Dashboard for Marine Spatial planning


A wior packaged built by Masumbuko Semba and Nyamisi Peter focusing on Easy Tidy and Process Oceanographic Data. The packages is basically developed to help marine and freshwater scientist access a large and varied format of in-situ and satellite data in easy way. In fact the package has made data access in much easy way. The authors are trying to remove the barrier of data access and leave a space for scientists to focus in much deeper thinking of their field rather than spending several days to understand codes for a specific data download. The package contains several tools that allows scientist to get a wide array of datasets. And the funny things is that you get a tidy format result of the download, which is easy to handle in R and also to share it out of R environment. The tidy format is in form that many scientist familiar with Excel spreadsheet will find it handy. You can access this package through this link: