The responses of N ile tilapia O reochromis niloticus ( L innaeus, 1758) in L ake W amala ( U ganda) to changing climatic conditions

Changes in the catches of N ile t ilapia, O reochromis niloticus (Linnaeus, 1758), in Lake W amala ( U ganda) have been observed since its introduction. The factors contributing to these changes, however, are not well understood. This study examined changes in species composition, size structure, si...

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Bibliographic Details
Published in:Lakes & Reservoirs : Science, Policy and Management for Sustainable Use Policy and Management for Sustainable Use, 2015-06, Vol.20 (2), p.101-119
Main Authors: Vianny, Natugonza, Richard, Ogutu‐Ohwayo, Jackson, Efitre, Fredrick, Muyodi, Dismas, Mbabazi, Mark, Olokotum, Laban, Musinguzi, Shamim, Naigaga, Sharon, Namboowa
Format: Article
Language:English
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Summary:Changes in the catches of N ile t ilapia, O reochromis niloticus (Linnaeus, 1758), in Lake W amala ( U ganda) have been observed since its introduction. The factors contributing to these changes, however, are not well understood. This study examined changes in species composition, size structure, size at first maturity, length–weight relationship and condition factor of N ile tilapia in L ake W amala, in relation to changes in temperature, rainfall and lake depth, to provide a better understanding of the possible role of changing climatic conditions. There was an increase in the minimum, maximum and average temperatures since 1980, but only the minimum (0.021 °C year −1 ) and average temperatures (0.018 °C year −1 ) exhibited a significant trend ( P  
ISSN:1320-5331
1440-1770
DOI:10.1111/lre.12091