Influence of maturity stage of mango at harvest on its ripening quality. Abstract-Introduction. The subjectivity of the external criteria used for the determination of mango maturity at its harvest led to the search for additional more reliable parameters to determine the optimal harvest maturity and able to replace the external and internal morphological indices. Materials and methods. Some physicochemical characteristics, such as colour of pulp, soluble dry extract, titratable acidity and weight loss, were evaluated on fruits of the cv. Kent (Mangifera indica L.) collected in North Cote d'Ivoire. The days necessary for ripening after harvest were estimated. Measurements were correlated to five maturity stages corresponding to the fruit harvest carried out at (76, 82, 88, 94 and 100) days after flowering. On each date of harvest, batches of 52 fruits were gathered. On half of them, maturation was observed as of harvest, the other half being kept at room temperature and the ripening evaluation then being done at the end of storage. Results. According to the harvest date, the soluble dry extract values varied from 8.3 °Brix to 10 °Brix at fruit harvest, and from 14.2 °Brix to 20 °Brix after ripening of the fruits stored at ambient temperature. Titratable acidity was correlated positively with maturity stage. Time to ripen and weight loss continuously decreased with the fruit maturity. For mangos of the cv. Kent, the date of the most suitable harvest seemed to be at 94 days after flowering. Mangos collected at 100 days after flowering developed better organoleptic characteristics such as sugar content, peel aspect and pulp colour than those of the fruit harvested earlier. Conclusion. Starting from the 94th day after flowering, the mango of the cv. Kent collected under the conditions of the North Cote d'Ivoire develops its best organoleptic characteristics during ripening. Cote d'Ivoire / Mangifera indica / fruits / harvesting / maturation / ripening Influence du stade de maturité de la mangue à la récolte sur son mûrissement.

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Climate change effects threat life on earth especially economically poor areas.Among them is noticed the shifting of the algae species Sargassum natans and Sargassum fluitanss seaweeds from the Brazilian coast to new areas along the West African coastline. Their occurrence along the Nigerian coast and their effect on livelihood are necessary subject because of their link to coastal dwellers food security and economic activities. This study aims to evaluate the perception of coastal residents on the occurrence of Sargassum on the banks and their notion of climate change effects. 206 household heads were interviewed using a structured questionnaire over eleven areas. The coastal population knowledge about climate change and the reason of the occurrence of Sargassum species, is limited due to low education level and information access limitations. Also, the population complained about the occurrence of another specie identified as Eichhornia crassipes which disturbs fishery and boats displacements. Moreover, changes in weather conditions particularly temperature have various consequences on the respondents' livelihood by affecting their health, welfare, feeding and incomes. The population lamented about challenges of climate change and occurrence of Sargassum fluitans affecting fishery as they have no any adaptation measures to cope with these situations.