Occurrence (present/absence) and abundance of zooplankton in Murchison Bay, Lake Victoria
Citation
Kiggundu V, Musinguzi L, Natugonza V (2019). Occurrence (present/absence) and abundance of zooplankton in Murchison Bay, Lake Victoria. National Fisheries Resources Research Institute. Sampling event dataset https://doi.org/10.15468/xxdflt accessed via GBIF.org on 2024-08-24.Description
This dataset presents zooplankton taxa occurrences and abundance in Murchison Bay, Northern Lake Victoria, Uganda. The data was obtained through a survey conducted in 2012 and 2013. Most of these species are microscopic with size ranging from ca 0.05mm to 2.0 mm and consist of crustaceans (copepods and cladocerans) and rotifers (wheel-animals). They (zooplankton) are important elements of the food chain where energy is transferred from algae (primary producers) to larger invertebrate predators and fish. The zooplankton species assemblage responds to environmental stressors such as nutrient enrichment, acidification, and fish stocks. The effects of environmental stress can be detected through changes in community structure (species composition, abundance, body size, and biomass) and food web structure. The ability of each species to persist in different given trophic conditions, make zooplankton a better bio-monitoring tool. Murchison bay receives effluents from an economically vibrant part of the Lake Victoria catchment (Kampala City) with much of the activities detrimental to the waters of this bay. In order to address some of the concerns, the Directorate of Water Resource Management (DWRM) carried out studies on management criteria for Lake Ecosystem in Murchison Bay in August/September of 2012 and 2013 with the objective of studying water quality indices according to specific requirements of the different water users within Murchison Bay areas for purposes of conservation and improving water quality for domestic uses and fisheries. Zooplankton was part of the key functional groups considered and documented.Sampling Description
Study Extent
Sampling was conducted in August/September 2012 and August 2013.Sampling
Zooplankton samples were collected with a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column, as described by Mwebaza-Ndawula (1994). Each sample was washed with tap water in the laboratory over a 53 µm sieve to remove the preservative and then diluted to a suitable volume, depending on the concentration of organisms in each sample. Sub-samples of 2, 2, 5 and 10 mL were taken with a wide bore automatic pipette from a well-agitated sample. The sub-sample series was performed to consider the more abundant organisms in 2, 2 mL series, and the rarer organisms in 2, 2, 5, 10 mL series. Each sub-sample was put into a counting chamber and examined under an inverted microscope (Hund, Wetzlar, Germany) at X100 magnification for taxonomic determination, and X40 for counting and organism body measurements.Quality Control
Some zooplankton were able to be identified to species level using published taxonomic keys (Sars 1895; Pennak 1953; Brooks 1957; Rutner-Kolisko 1974; Koste 1978; Boxshall & Braide 1991; Korinek 1999). Taxonomic names were cross-checked using the World Register of Marine Species (WoRMS). Densities of organisms were calculated from the counts, with reference to the sample net mouth diameter and water column depth at each sampling site (Mwebaza-Ndawula L., 1998).Method steps
- Collection of the zooplankton In the field, a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column to have an integrated sample was used to collect the zooplankton. Three hauls were taken per site and were combined to make a composite sample. Preserving the samples The composite sample was preserved with sugar-formalin, in a ratio of 1-part formalin to 10 parts sample volume, the sugar was to stop the ballooning of cladocerans for easy identification. Identification of zooplankton taxa In the laboratory, samples were washed using a sieve of 53 µm to remove the fixatives. Some organisms were identified to species level using published keys (Sars, 1895, Pennak, 1953, Brooks, 1957, Rutner-Kolisko, 1974, Koste, 1978, Boxshall and Braide, 1991, Korinek, 1999). The density of organisms was calculated from the counts data, with reference to the sample net mouth diameter and water column depth at each sampling site (Mwebaza-Ndawula, 1998, unpubl. PhD Thesis)
Taxonomic Coverages
This dataset consists of freshwater zooplankton
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Afrocyclopsrank: genus
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Ascomorpharank: genus
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Asplanchnarank: genus
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Bosmina longirostrisrank: species
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Brachionus angularisrank: species
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Brachionus bidentatarank: species
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Brachionus budapestinensisrank: species
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Brachionus calyciflorusrank: species
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Brachionus caudatusrank: species
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Brachionus dimidiatusrank: species
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Brachionus falcatusrank: species
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Brachionus forficularank: species
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Brachionus patulusrank: species
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Brachionus plicatilisrank: species
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Brachionus quadridentatusrank: species
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Brachionus urceolarisrank: species
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Brachionus variabilisrank: species
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Calanoidaerank: family
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Ceriodaphnia cornutarank: species
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Chydorusrank: genus
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Cyclopoidaerank: family
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Daphnia longispinarank: species
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Daphnia longispinarank: species
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Daphnia lumholtzirank: species
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Daphnia lumholtzirank: species
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Diaphanosoma excisum
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Euclanis
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Eucyclops
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Filinia longisetarank: species
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Filinia opoliensisrank: species
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Harpacticoidarank: order
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Hexanaupliarank: class
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Hexathrarank: genus
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Keratella cochlearisrank: species
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Keratella tropicarank: species
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Lecane bullarank: species
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Lecane lunarank: species
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Macrothrixrank: genus
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Mesocyclopsrank: genus
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Moina micrurarank: species
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Platyiasrank: genus
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Platyias quadricornisrank: species
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Polyarthrarank: genus
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Polyarthra vulgarisrank: species
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Synchaetarank: genus
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Synchaeta pectinatarank: species
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Thermocyclops decipiensrank: species
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Thermocyclops eminirank: species
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Thermocyclops incisusrank: species
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Thermocyclops neglectusrank: species
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Thermocyclops oblongatusrank: species
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Thermodiaptomus galeboidesrank: species
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Trichocercarank: genus
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Trichocerca cylindricarank: species
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Tropocyclops confinnisrank: species
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Tropocyclops tenellusrank: species
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Tropodiaptomus stuhlmanni speciesrank: species
Geographic Coverages
The dataset covers Murchison bay, Lake Victoria. The bay is adjacent to Kampala, the capital city of Uganda.
Bibliographic Citations
- Boxshall, G. A. & Braide, E. I. 1991. The freshwater cyclopoid copepods of Nigeria, with an illustrated key to all species. Bull. Br. Mus. Nat. Hist. (zool), 57, 185-212. -
- Brooks, J. L. 1957. The systematics of North American Daphnia. Memoirs of the connecticut academy of Arts and Sciences, 13, 1-18. -
- Korinek, V. 1999. A guide to limnetic species of Cladocera of African inland waters (Crustacea, Branchiopoda). The International Association of Theoretical and Applied Limnology. SIL. -
- Koste, W. 1978. Rotatoria. Die Radertiere Mitteleuropas. Ein Bestimmungwerk, begrundet vo Max Voig. Uberrordnung Monogononta. Gebruder Borntraeger, Berlin, Stuttgart. -
- Pennak, R. W. 1953. Fresh-water invertebrates of the United States, New York, John Wiley & Sons. -
- Rutner-Kolisko, A. 1974. Planktonic rotifers: Biology and taxonomy, Biological Station Lunz of the Austrian Academy of Science. E. Schweizerbart’sche Verlagsbuchhandlung. -
- Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag -
Contacts
Vincent Kiggunduoriginator
position: Senior Research Technician
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
343
UG
email: vkiggundu@hotmail.com
Laban Musinguzi
originator
position: Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
343
UG
email: labanmusinguzi@firi.go.ug
homepage: https://labanmusinguzi.com/
userId: https://scholar.google.com/citations?user=m2Dzl1gAAAAJ&hl=en
Vianny Natugonza
originator
position: Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
343
UG
email: viannynatugonza@firi.go.ug
userId: http://scholar.google.com/citations?user=https://scholar.google.ca/citations?user=KewxfP8AAAAJ&hl=en
Vincent Kiggundu
metadata author
position: Senior Research Technician
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
343
UG
email: vkiggundu@hotmail.com
Laban Musinguzi
point of contact
position: Research officer
National Fisheries Resources Resources Research Institute
Nile Crescent, Plot 39/45, Jinja opposite the Wagon ferry terminal
Jinja
343
UG
email: labanmusinguzi@firi.go.ug
homepage: http://www.firi.go.ug/
Vincent Kiggundu
administrative point of contact
position: Senior Research Technician
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
UG
email: vkiggundu@hotmail.com
Laban Musinguzi
administrative point of contact
position: Research Officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
Jinja
343
UG
email: labanmusinguzi@firi.go.ug
homepage: https://labanmusinguzi.com/
userId: https://scholar.google.com/citations?user=m2Dzl1gAAAAJ&hl=en