Zooplankton occurrences and abundance in the Lake Edward system, Uganda

Registros

Los datos en este recurso de registros biológicos han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 1.492 registros.

Este IPT archiva los datos y, por lo tanto, sirve como repositorio de datos. Los datos y los metadatos del recurso están disponibles para su descarga en la sección descargas. La tabla versiones enumera otras versiones del recurso que se han puesto a disposición del público y permite seguir los cambios realizados en el recurso a lo largo del tiempo.

Versiones

La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.

¿Cómo referenciar?

Los usuarios deben citar este trabajo de la siguiente manera:

Kiggundu V, Egessa R, Mwebaza-Ndawula L (2021): Zooplankton occurrences and abundance in the Lake Edward system, Uganda. v1.0. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=lakeedwardsystemzoo&v=1.0

Derechos

Los usuarios deben respetar los siguientes derechos de uso:

El publicador y propietario de los derechos de este trabajo es National Fisheries Resources Research Institute. Esta obra está bajo una licencia Creative Commons de Atribución/Reconocimiento-NoComercial (CC-BY-NC 4.0).

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: 1dc8b287-7eab-49a8-ad49-efcb4671b2a6.  National Fisheries Resources Research Institute publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Uganda.

Palabras clave

Occurrence; Uganda; Zooplankton; Lake Edward; Observation

Contactos

Cobertura geográfica

Lake Edward system, including two nearby small lakes (Chahafi and Kayumbu) in the Lake Victoria Basin)

Cobertura taxonómica

The taxa include three broad groups of zooplankton: Copepoda, Cladocera and Rotifera

Cobertura temporal

Métodos de muestreo

This work was part of research and monitoring studies conducted in predetermined sites and localities on water bodies within the Lake Edward system, including two nearby small lakes in the Lake Victoria basin. The lakes covered include Edward, George, Mutanda, Mulehe, Chahafi, Nakasanda, Bunyonyi and Kayumbu. The rivers covered are Rwimi and Lubilia. The wetlands covered are Kyase, Kiruruma and Ruhuma. The sites sampled represent different habitats based on the factors such as depth, distances from shoreline and water flow (lentic or lotic). In lakes, zooplankton samples were collected with a conical plankton net (Nansen type; mesh size 60 µm or 100 µm; mouth diameter 0.25 m), towed vertically through the water column, as described by Fernando (2002) and Mwebaza-Ndawula (1994). In rivers and wetlands, sampling was done using Schindler trap with 5 litre capacity. 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 were 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 inverted microscope (Hund, Wetzlar, Germany) at X100 magnification for taxonomic determination, and X40 for counting and organism body measurements.

Descripción de la metodología paso a paso:

1. Collection of the zooplankton In lakes, a conical plankton net (Nansen type; mesh size 60 or 100 µm; mouth diameter 0.25 m), towed vertically through the water column to have an integrated sample was used to collect the zooplankton. Collection of samples in rivers and wetlands used a Schindler trap. Three hauls were taken per site and were combined to make a composite sample.
2. Preserving the samples Samples were preserved in a sugar-formalin mixture. The sugar was to stop the ballooning of cladocerans for easy identification.
3. 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.

Referencias bibliográficas

1. 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.
2. Brooks, J. L. 1957. The systematics of North American Daphnia. Memoirs of the connecticut academy of Arts and Sciences, 13, 1-18.
3. Fernando, C. H. 2002. A Guide to Tropical Freshwater Zooplankton. Identification, Ecology and Impact on Fisheries, Leiden, The Netherlands, Backhuys Publishers.
4. 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.
5. Koste, W. 1978. Rotatoria. Die Radertiere Mitteleuropas. Ein Bestimmungwerk, begrundet vo Max Voig. Uberrordnung Monogononta. Gebruder Borntraeger, Berlin, Stuttgart.
6. Pennak, R. W. 1953. Fresh-water invertebrates of the United States, New York, John Wiley & Sons.
7. Rutner-Kolisko, A. 1974. Planktonic rotifers: Biology and taxonomy, Biological Station Lunz of the Austrian Academy of Science. E. Schweizerbart’sche Verlagsbuchhandlung.
8. Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag

Metadatos adicionales