Zooplankton occurrences and abundance in the Lake Kyoga system, Uganda
Citation
Kiggundu V, Egessa R, Mwebaza-Ndawula L (2022). Zooplankton occurrences and abundance in the Lake Kyoga system, Uganda. Version 1.1. National Fisheries Resources Research Institute. Occurrence dataset https://doi.org/10.15468/kc6dy5 accessed via GBIF.org on 2024-09-01.Description
The dataset presents occurrences and abundance of zooplankton taxa obtained from different surveys conducted over a 12-year period from 1998-2000, 2002-2004, 2006, 2009-2010, 2014-15 and 2017. The surveys were conducted in different waterbodies and habitat types within the Lake Kyoga system, covering 12 water bodies (10 lakes and 2 rivers).Sampling Description
Study Extent
This data published in this dataset was collected from research and monitoring studies conducted in water bodies within the Lake Kyoga system. The water bodies covered are lakes Agu, Bisina, Gigatte, Kawi, Kimira, Kwania, Kyoga, Lemwa, Nawampasa and Nyaguo, and rivers Nile (Upper Victoria Nile) and Nabigagga. The studies were conducted in the period between 1998 and 2017. Data is available for specific waterbodies for 1998-2000, 2002-2004, 2006, 2009-2010, 2014-15 and 2017.Sampling
Zooplankton samples were collected with a conical plankton net (Nansen type; mesh size 60 µm and mouth diameter of 0.25 m), towed vertically through the water column, as described by Fernando (2002) and Mwebaza-Ndawula (1994). Three hauls were taken and combined to make composite samples which preserved in 5% formalin and transferred to laboratory for taxonomic analysis and enumeration. In the laboratory, each sample was washed with tap water 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 were performed to consider 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
Taxa were identified lowest possible taxonomic 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 counts data, with reference to the sample net mouth diameter and water column depth at each sampling site as per Fernando (2002).Method steps
- Collection of the zooplankton A conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m) was used to collect samples. It was towed vertically through the water column to have an integrated sample. Three hauls were taken per site and were combined to make a composite sample.
- Preserving the samples Samples were preserved in a sugar-formalin mixture. 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. Organisms were identified to the smallest taxonomic level possible using taxonomic keys (Sars, 1895, Pennak, 1953, Brooks, 1957, Rutner-Kolisko, 1974, Koste, 1978, Boxshall and Braide, 1991, Korinek, 1999). Density of organisms were calculated from the counts data, with reference to the sample net mouth diameter and water column depth at each sampling site.
Taxonomic Coverages
Freshwater zooplankton identified to order, family, genus and species
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Afrocyclopsrank: genus
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Ascomorpharank: genus
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Asplanchnarank: genus
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Beauchampiella eudactylotarank: species
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Bosmina longirostrisrank: species
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Brachionus angularisrank: species
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Brachionus bidentatusrank: 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 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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Cephlodellarank: genus
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Ceriodaphnia cornutarank: species
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Chydorusrank: genus
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Cyclopoidaerank: family
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Daphnia barbatarank: species
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Daphnia lumholtzirank: species
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Diaphanosoma excisumrank: species
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Euclanisrank: genus
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Eucyclopsrank: genus
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Filinia longisetarank: species
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Filinia opoliensisrank: species
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Harpacticoidarank: genus
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Hexanaupliarank: genus
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Hexathrarank: genus
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Keratella cochlearisrank: species
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Keratella tropicarank: species
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Lecanerank: genus
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Lecane bullarank: species
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Lecane lunarank: species
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Lepadellarank: genus
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Macrochaetus sericusrank: species
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Macrothrixrank: genus
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Mesocyclopsrank: genus
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Moina micrurarank: species
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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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Testudinella obscurarank: species
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Testudinella patinarank: species
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Thermocyclopsrank: genus
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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 confinisrank: species
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Tropocyclops tenellusrank: species
Geographic Coverages
The dataset covers waterbodies and habitats types within the Lake Kyoga system, covering 12 water bodies (10 lakes and 2 rivers).
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. -
- Fernando, C. H. 2002. A Guide to Tropical Freshwater Zooplankton. Identification, Ecology and Impact on Fisheries, Leiden, The Netherlands, Backhuys Publishers. -
- 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. -
- Mwebaza-Ndawula (1994). Changes in relative abundance of zooplankton in northern Lake Victoria, East Africa. Hydrobiologia, 272, 256-264 -
- 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 (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
email: vkiggundu@hotmail.com
Robert Egessa
originator
position: Research Officer
National Fisheries Resources Research Institute (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
email: robert.egessa@gmail.com
Lucas Mwebaza-Ndawula
originator
position: Senior research officer
National Fisheries Resources Research Institute (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
email: mugenda@gmail.com
Vincent Kiggundu
metadata author
position: Senior Research technician
National Fisheries Resources Research Institute (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
email: vkiggundu@hotmail.com
Laban Musinguzi
user
position: Research Officer
National Fisheries Resources Research Institute (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
Telephone: 0775701126
Laban Musinguzi
administrative point of contact
position: Research Officer
National Fisheries Resources Research Institute (NaFIRRI)
Nile Crescent, Plot 39/45, Jinja
Jinja
343
UG
Telephone: 0775701126
email: musinguzilaban@gmail.com