Spawning migration of Labeobarbus species of Lake Tana across the Gilgel Abay River Weir, Ethiopia: The challenges to fish spawning migration and proposed management solutions

Abstract

Freshwater environments are not only among the most threatened ecosystems on our planet (Okwiri et al., 2019;Sala et al., 2000), but also the most heavily exploited by humans (McCully, 2000). Fresh waters are used, for example, for commercial and recreational fishing and irrigation purposes (Arthington et al., 2004). Fishes are a source of income for many people, especially in developing countries

The investigation of the zooplankton community in the newly formed Ribb Reservoir, Ethiopia: the tropical highland reservoir

“…A total filling volume of 7.8 million m 3 , a storage volume of 234 million m 3 , dead storage of 27 million cubic meters, a side canal overflow (duration of 683 m), a ridge length of 107 m, and a ridge height of 1940 m above sea level ( Ministry of Water and Energy, 2010 ) ( Figure 1 ). It is home to 11 fish species, most of which are endemic but vulnerable Labeobarbus species ( Mequanent et al., 2022a , 2022b ).

Figure 1 Map of the study area.

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