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Background: Researchers in the developing countries often have inadequate scientific writing skills to publish their research in international peer reviewed journals. Objectives: To improve the research-and proposal-writing skills of researchers and to evaluate the impact of this intervention. Methods: An off-the-shelf online course (AuthorAID, developed by INASP) was embedded in the Tanzania Fisheries Research Institute's (TAFIRI) website and offered to the institute researchers in Tanzania. The 8-week course was followed by a 2-day face-to-face workshop that used the course material contextualized to local conditions, and the combination was repeated one more time. Results: A total of 47 participants completed the course and attended the workshop: 21 (54%) completed the course in 2016 and 26 (67%) in 2017. The number of papers published annually by TAFIRI staff more than tripled between 2016 and 2019 after the AuthorAID intervention, most of them (114, or 91%) by researchers who had undergone the training. Conclusion: Embedding and contextualizing proven learning materials, such as the AuthorAID online course, can be an economical and effective approach to improving the writing skills of scientists in developing countries. [ABSTRACT FROM AUTHOR]

• The periodic, temporary closure has positive economic benefits to coastal fishing villages. • The timing of octopus temporal closure requires scientific evidence for an effective outcome. • Improving the management of octopus fisheries can deliver endless benefits throughout the octopus supply chain while rebuilding the stocks. [ABSTRACT FROM AUTHOR]

Lake Victoria is well known for its high diversity of endemic fish species and provides livelihoods for millions of people. The lake garnered widespread attention during the twentieth century as major environmental and ecological changes modified the fish community with the extinction of approximately 40% of endemic cichlid species by the 1980s. Suggested causal factors include anthropogenic eutrophication, fishing, and introduced non-native species but their relative importance remains unresolved, partly because monitoring data started in the 1970s when changes were already underway. Here, for the first time, we reconstruct two time series, covering the last approximately 200 years, of fish assemblage using fish teeth preserved in lake sediments. Two sediment cores from the Mwanza Gulf of Lake Victoria, were subsampled continuously at an intra-decadal resolution, and teeth were identified to major taxa: Cyprinoidea, Haplochromini, Mochokidae and Oreochromini. None of the fossils could be confidently assigned to non-native Nile perch. Our data show significant decreases in haplochromine and oreochromine cichlid fish abundances that began long before the arrival of Nile perch. Cyprinoids, on the other hand, have generally been increasing. Our study is the first to reconstruct a time series of any fish assemblage in Lake Victoria extending deeper back in time than the past 50 years, helping shed light on the processes underlying Lake Victoria's biodiversity loss.

The distribution of As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn and their fraction characteristics (except Hg) were investigated in surface sediments of the Mwanza Gulf, Lake Victoria. The ecological risks, bioavailability, and mobility of the metals were also evaluated by using enrichment factor (EF), contamination factor (C f ), geo-accumulation index (I geo ), potential ecological risk index (RI), risk assessment code (RAC), individual contamination factor (ICF), and global contamination factor (GCF). Results showed that there were moderate accumulations of heavy metals in sediments from the southern part of the gulf. The mean C f of heavy metals ranged from 1.19 (Ni) to 2.85 (Hg) suggesting moderate contamination of heavy metals in the sediments while I geo results showed that the sediments are mainly contaminated by As, Cr, and Hg. The average potential ecological risk of heavy metals in sediments of the Mwanza Gulf is at moderate level (RI 205.49). Hg and Cd posed considerable or moderated risks with mean ecological risk of 114.18 and 44.16, which accounted for 51.08% and 21.54% of the total RI, respectively. High bioavailability and mobility of heavy metals were found in sediments near Mwanza city, particularly Zn and Cd, of which the bioavailability risks were at medium to high levels. Given the biological and environmental importance of the Mwanza Gulf and Lake Victoria, emission paths and bioaccumulation of heavy metals through food webs should be studied carefully to ensure the safety of food and the health and well-being of humans., (© 2022. The Author(s), under exclusive licence to Springer Nature Switzerland AG.)