The data in this occurrence resource has been published as a Darwin Core Archive (DwC-A), which is a standardized format for sharing biodiversity data as a set of one or more data tables. The core data table contains 860 records.
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Researchers should cite this work as follows:
Gandhi Pabire W (2021): Taxa occurrences and composition of benthic macroinvertebrates from biodiversity surveys on Lake Victoria, Uganda (2001-2006). v1.1. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=lakevictoriainventory&v=1.1
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The publisher and rights holder of this work is National Fisheries Resources Research Institute. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License.
This resource has been registered with GBIF, and assigned the following GBIF UUID: f5656abf-d557-4abd-9dc1-6c7992159b8c. National Fisheries Resources Research Institute publishes this resource, and is itself registered in GBIF as a data publisher endorsed by GBIF Uganda.
Occurrence; Lake Victoria; Uganda; Macro-invertebrates; Observation
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The dataset covers sites on Lake Victoria, Uganda
|Bounding Coordinates||South West [-1.055, 31.509], North East [0.549, 34.146]|
Aquatic benthic macro-invertebrates
|Family||Cordulidae, Ephemeridae, Glossiphoniidae, Leptoceridae, Libellulidae|
|Genus||Ablabesmyia, Bellamya genus, Biomphalaria, Bulinus, Byssanodonta, Caelatura, Caenis, Chaoborus, Chimarra, Chironomus, Clinotanypus, Corbicula, Cryptochironomus, Economus, Neochetina, Palpomyia, Procladius, Sphaerium, Tanypus, Tanytarsus|
|Species||Caridina nilotica, Gabbia humerosa, Melanoides tuberculata, Mutera bourguignat, Povilla adusta|
The surveys considered several sites along the shoreline of Lake Victoria in Uganda. A Ponar grab with an open jaw area of 238 cm2 was used to take samples of benthic macroinvertebrates. Three spread hauls were taken from each sampling point or site, and mixed to form a composite. The bottom type at each point was described from the grabbed contents. The composite sample was concentrated and then placed in labeled sample bottles and preserved with 5% formalin solution and taken for laboratory analysis. In the laboratory, each sample was rinsed with water and then placed on a white flat-bottomed tray. Macro-invertebrates were sorted, and individual taxa identified to the lowest possible taxonomic level using identification keys (Mandahl-Barth, 1954), Pennak, 1953), Merritt and Cummins, 1997, De Moor et al. 2003). All taxa were recorded, and individuals of each taxon enumerated to estimate their densities.
|Study Extent||The datasets present data for surveys conducted between 2001 and 2006.|
|Quality Control||The samples were immediately processed in the field and treated with formalin to keep the organisms of interest intact. To avoid loss of organisms during sample processing, nets with appropriate mesh sizes were used.|
Method step description:
- Collection of the macroinvertebrates In the field, sediment samples were collected using a Ponar grab with an open jaw surface area of 238 cm2. At each site, three sediment samples were obtained. The three samples were mixed and concentrated to form one composite sample for each site. Preserving the samples The composite sample for each site was separately preserved in 5% formalin to maintain the organisms in good condition prior to analysis in the laboratory. Identification of macroinvertebrates In the laboratory, formalin was rinsed off from each sample and placed in white flat-bottomed trays. Using pairs of forceps, all benthic macro invertebrates were sorted from the sediment and the individual taxa identified to the lowest possible taxonomic level using appropriate identification keys and a dissecting binocular microscope at 4x 25 magnification.
- De Moor IJ, Day JA and de Moor FC (Eds) (2003b) Guide to Freshwater Invertebrates of South Africa. Vol. 8: Insect II. Hemiptera, Megaloptera, Neuroptera, Trichoptera & Lepidoptera, 208Pg.
- Mendahl-Barth, G. (1954). The Freshwater Mollusks of Uganda and Adjacent Territories. Annls Mus. r. Congo Belge, 8°, Zoology, 32: 1–206.
- Merritt, R. W., & Cummins, K. W. (1997). An introduction to the aquatic insects of North America (3rd ed.). Dubuque: Kendall/Hunt Publishing Co. 720 Pg.
- Pennak, R.W. 1953. Fresh-water Invertebrates of the United States. John Wiley & Sons, New York. 769pg.
- Pennak, R. W, (1953). Fresh-water invertebrates of the United States. 2th Edition, John Wiley & Sons, New York, 803 Pages.