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Migration of an anadromous fish to heterogeneous environment continuously enforces a selective pressure that incorporates a wide range of life-history strategies by which individuals adapt to the prevailing conditions.
In Nigeria, like many coastal developing countries, fish is an important source of food for the population, which is currently estimated at 186 million people (World Bank 2016). A recent study estimated that Nigeria ranks third globally for the number of people dependent on coastal fisheries for food and nutrition security, and the demand for fish is growing, alongside growth in population and incomes.
Although as of June 1, 2020, Solomon Islands had no coronavirus cases, there was a national economic recession plus restrictions on people’s movement, gatherings, education and business activities. For rural areas, two of the biggest changes have been increased circulation of people—those who moved out of Honiara and back to the provinces—and reduced cash flow.