Effect of Commercial Fishing on Avian Diversity and Activity Patterns of Marabou Stork and African Fish-Eagle in Lake Hawassa
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Date
2018-06-05
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Addis Ababa University
Abstract
This study was conducted in one of the central rift valley Lakes of Ethiopia, in Lake
Hawassa to assess the effect of commercial fishing activity on avian diversity and
activity patterns of Marabou Stork and African Fish-Eagle in the area. Commercial
fishing site was selected as one study site and an area about 2 – 3 km away from the
commercial fishing site area was selected as a non-fishing study site. The study was
conducted from July 2017 to March 2018 covering both wet and dry seasons. Data
collection was carried out by careful and repeated observations in the selected study
sites. The result of the study showed that, the avian diversity in the commercial
fishing site area of Lake Hawassa was less the avian diversity in the non-fishing
site of Lake Hawassa and it was significantly different between seasons ( P < 0.05 ).
The major diurnal activity of Marabou Stork in the commercial fishing site and nonfishing
site of Lake Hawassa during wet and dry seasons was foraging and it was
not significantly different ( P > 0.05 ) between seasons and the between study sites.
The diurnal activity patterns of the African Fish-Eagle during both the wet and dry
seasons in both study sites of Lake Hawassa had no significant difference ( P > 0.05
). The study showed that, the commercial fishing activity in Lake Hawassa had
significant effect on the avian diversity ( P < 0.05 ). However, the commercial fishing
activity did not affect the diurnal activity patterns of the selected species of birds in
Lake Hawassa.
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Keywords
African Fish-Eagle, Avian Diversity, Commercial Fishing Activity, Diurnal Activity Patterns and Marabou Stork