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The Unusual Reddish-Bloom Appearance in a Freshwater Fishpond at Kingolwira National Fish Farming Center, Morogoro, Tanzania
Author(s) -
Offoro N. Kimambo,
Jabulani R. Gumbo,
Titus A.M. Msagati,
Hector Chikoore
Publication year - 2020
Publication title -
international journal of environment
Language(s) - English
Resource type - Journals
ISSN - 2091-2854
DOI - 10.3126/ije.v9i2.32734
Subject(s) - tanzania , agriculture , environmental science , fishery , biology , fish <actinopterygii> , ecology , environmental planning
The study aimed to examines a case of what constituted the uncommonly reddish-bloom appearance in the fishponds during the dry season (September 2018) at Kingolwira National Fish Farming Center located in Morogoro, Tanzania. The study used a benchtop FlowCAM® to investigate species' morphology. One-time assessment of physico-chemical characteristics during the event was performed from the reddish and non-reddish fishponds. Images were compared with the available literature, but also t-test statistics were performed to examine the difference between the fishponds. The results show that the fishponds were significantly (p<0.05) different from each other in terms of physico-chemical parameters except for water temperatures. Furthermore, Microcystis species dominated the non-reddish fishpond whereas Euglenophytes species were pervasive in the reddish fishpond. The two species have the potential to produce secondary metabolites (toxins) or to produce a hypoxia condition that is harmful to the fishery, aquatic ecology, and human. To confirm toxicity nature and dynamics further,  future studies should consider extensive and regular diurnal and long-term monitoring.

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