| id |
RBT5486
|
| record_format |
ojs
|
| spelling |
RBT54862022-06-06T18:14:30Z Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir K. Mustapha, Moshood embalse calidad del agua grupos ícticos cuencas hidrográficas manejo reservoir water quality fish assemblages watershed management Agricultural and fisheries activities around the watershed of an African tropical reservoir (Oyun reservoir, Offa, Nigeria) were found to contribute significantly to water quality deterioration of the dam axis of the reservoir, leading to eutrophication of that part of the reservoir. This is evident from the high amount of nitrate (6.4 mg/l), phosphate (2.2 mg/l) and sulphate (16.9 mg/l) in the water body which was higher than most other reservoirs in Nigeria. These nutrients originate in fertilizer run-offs from nearby farmlands and were found in higher concentrations in the rainy season which is usually the peak of agricultural activities in the locality. The eutrophication was more pronounced on the dam axis because it is the point of greatest human contact where pressure and run-off of sediments were high. The eutrophication altered the food web cycle which consequently affected the fish species composition and abundance with the dominance of cichlids (planktivorous group) and decline of some species in the fish population. Best management practices (BMP) to control and reduce the eutrophication and improve water quality and fish assemblages should be adopted and adapted to suit the situation in the reservoir. Universidad de Costa Rica 2009-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/5486 10.15517/rbt.v57i3.5486 Revista de Biología Tropical; Vol. 57 No. 3 (2009): Volume 57 – Regular number 3 – September 2009; 707−719 Revista de Biología Tropical; Vol. 57 Núm. 3 (2009): Volumen 57 – Número regular 3 – Setiembre 2009; 707−719 Revista Biología Tropical; Vol. 57 N.º 3 (2009): Volume 57 – Regular number 3 – September 2009; 707−719 2215-2075 0034-7744 10.15517/rbt.v57i3 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/5486/5232 Copyright (c) 2009 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0
|
| institution |
Universidad de Costa Rica
|
| collection |
Revista de Biología Tropical
|
| language |
eng
|
| format |
Online
|
| author |
K. Mustapha, Moshood
|
| spellingShingle |
K. Mustapha, Moshood
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| author_facet |
K. Mustapha, Moshood
|
| author_sort |
K. Mustapha, Moshood
|
| title |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| title_short |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| title_full |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| title_fullStr |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| title_full_unstemmed |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| title_sort |
influence of watershed activities on the water quality and fish assemblages of a tropical african reservoir
|
| title_alt |
Influence of watershed activities on the water quality and fish assemblages of a tropical African reservoir
|
| publisher |
Universidad de Costa Rica
|
| publishDate |
2009
|
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5486
|
| work_keys_str_mv |
AT kmustaphamoshood influenceofwatershedactivitiesonthewaterqualityandfishassemblagesofatropicalafricanreservoir
|
| _version_ |
1810114546569838592
|