Benthic macroinvertebrate taxa occurrences and composition associated with a cage aquaculture farm on Lake Victoria, Uganda

Evento de muestreo
Última versión publicado por National Fisheries Resources Research Institute el abr 17, 2019 National Fisheries Resources Research Institute
Fecha de publicación:
17 de abril de 2019
Licencia:
CC-BY 4.0

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Descripción

This dataset presents occurences and abundance of macroinvertebrate taxa recorded in sites in relation to a cage fish farm in Lake Victoria, Uganda

Registros

Los datos en este recurso de evento de muestreo 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 1.462 registros.

también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.

Event (core)
1462
Occurrence 
1462

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:

Pabire W G, Egessa R, Mwebaza-Ndawula L, Musinguzi L, Natugonza V (2019): Benthic macroinvertebrate taxa occurrences and composition associated with a cage aquaculture farm on Lake Victoria, Uganda. v1.1. National Fisheries Resources Research Institute. Dataset/Samplingevent. http://ipt-uganda.gbif.fr/resource?r=macroinvertebratesforson&v=1.1

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 (CC-BY 4.0).

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: 6cef8c28-b4dd-4082-af20-57cdc660a5bd.  National Fisheries Resources Research Institute publica este recurso y está registrado en GBIF como un publicador de datos avalado por GBIF Uganda.

Palabras clave

Sampling event; macro-invertebrates; Uganda; Lake Victoria; Cage aquaculture

Contactos

Willy Gandhi Pabire
  • Proveedor De Los Metadatos
  • Originador
  • Punto De Contacto
Research technician
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
343 Jinja
UG
+256776959037
Robert Egessa
  • Originador
Research officer
National Fisheries Resources Resources Research Institute
Nile Crescent, Plot 39/45, Jinja opposite the Wagon ferry terminal
343 Jinja
UG
Lucas Mwebaza-Ndawula
  • Originador
Senior research officer
National Fisheries Resources Resources Research Institute
Nile Crescent, Plot 39/45, Jinja opposite the Wagon ferry terminal
343 Jinja
UG
Laban Musinguzi
  • Originador
  • Punto De Contacto
Research officer
National Fisheries Resources Research Institute
Nile Crescent, Plot 39/45, Jinja Opposite the wagon ferry terminal
343 Jinja
UG
+256775701126
Vianny Natugonza
  • Originador
Research officer
National Fisheries Resources Resources Research Institute
Nile Crescent, Plot 39/45, Jinja opposite the Wagon ferry terminal
343 Jinja

Cobertura geográfica

The geographical area covers the location of the cage fish farm where data was collected.

Coordenadas límite Latitud Mínima Longitud Mínima [0,403, 33,191], Latitud Máxima Longitud Máxima [0,411, 33,208]

Cobertura taxonómica

This information is about the benthic macro-invertebrates (ie; invertebrates which live on or in the sediment at the bottom of the water bodies and are big enough to be seen with naked eyes).

Class Hirudinea, Oligochaeta
Familia Baetidae, Ceratopogonidea, Chironomidae, Heptageniidae, Leptoceridae, Libellulidae, Perlidae
Subfamilia Chironominea
Género Ablabesmyia, Aspatheria, Biomphalaria, Bulinus, Caenis, Chaoborus, Chironomus, Clinotanypus, Cryptochironomus, Dipsuedopsis, Economus, Ephemerella, Euthraulus, Ictinogomphus, Phyllomacomia, Procladius, Pseudoneureclipsis, Sphaerium, Tanypus, Tanytarsus, Terithemis, Tricorythus
Especie Anisus natalensis, Bellamya unicolor, Byssanodonta parasitica, Caelatura alluaudi, Caelatura hauttecoeuri, Caelatura monceti, Caridina nilotica, Cleopatra pirothi, Corbicula africana, Etheria eliptica, Gabbia humerosa, Lentorbis junodi, Melanoides tuberculata, Mutela bourguignati, Pila ovata, Pisidium victoriae, Povilla adusta

Cobertura temporal

Periodo de formación 2011-current

Datos del proyecto

The project is part of a monitoring intervention that was established to monitor the impacts of cage aquaculture on water environment. This followed the introduction of a cage aquaculture in northern Lake Victoria in 2010. The environment monitoring is undertaken at Source of the Nile, a private cage fish farm, in Napoleon gulf, northern Lake Victoria. The monitoring is justified by the fact that cage aquaculture negatively impacts environmental conditions due to release of nutrients into the water, leading to undesirable impacts such as eutrophication, spread of diseases, genetic dilution for native species, and conflicts with other uses. Eutrophication can create anoxic conditions in sediments thus changing the abundance and composition of the resident organisms especially macroinvertebrates.

Título Environmental monitoring of Source of the Nile (SON) cage fish farm in Napoleon Gulf, northern Lake Victoria
Fuentes de Financiación Funding is provided by Source of the Nile Fish Farm Limited
Descripción del área de estudio The study was undertaken at location of a fish farm. The farm is located near the headwaters of the River Nile, Napoleon gulf, Lake Vitoria, Uganda (Mwebaza-Ndawula et al. 2013).
Descripción del diseño Three study transects were originally set up for the study. Transect 1 was approximately 1 km upstream of the area with fish cages (USC. Tansect 2 was located within the fish cage rows (WC) and transect 3 was approximately 1 km downstream of the fish cages (DSC). Each transect contained three sampling points, at intervals of 50 meters apart. These are named sequentially as site one, site two and site three under each transect category. However, as the fish farm expanded, some areas previously under some of the transects started being included under cages. As a result, a change in design was implemented since 2017 to include other sites namely between cages, reference point, upstream point and and within cages site 4.

Personas asociadas al proyecto:

Willy Ghandi Pabire
  • Curador
Robert Egessa
  • Investigador Principal
Lucas Mwebaza-Ndawula
  • Investigador Principal

Métodos de muestreo

A Ponar grab (with open jaw area, 238cm2) was used to take sediment samples for analysis of benthic macroinvertebrates. Three spread hauls were taken from each of the selected areas (see design above). The bottom type at each point was described from the grabbed contents. Each of the three samples (hauls) from each area was then concentrated 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 to remove the formalin and then placed on a white flat-bottomed tray. Using pair of forceps all macro-invertebrates were sorted from the sediment and the individual taxa identified to the lowest possible taxonomic level using identification manuals and a dissecting binocular microscope at x 25 magnification. All taxa from the different hauls were recorded and individuals of each taxon enumerated to estimate their densities from which the following results were generated. The taxa were identified using taxonomic keys by Mandahl-Barth (1954), Pennak (1953), and Merritt and Cummins (1997).

Área de Estudio The monitoring project commenced in 2011. In that year, sampling was conducted once in February, May, September and November at each of the selected sampling points in each transect.
Control de Calidad The samples were immediately processed in the field and treated with formalin to keep the organisms of interest intact and prevent them from rotting. To avoid loss of organisms during sample processing, appropriate mesh sizes were used.

Descripción de la metodología paso a paso:

  1. 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.
  2. 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.
  3. 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 x 25 magnification.

Referencias bibliográficas

  1. Mwebaza-Ndawula, L. et al. 2013. Effects of cage fish culture on water quality and selected biological communities in northern Lake Victoria, Uganda. Uganda Journal of Agricultural Sciences, 14(2), 61 – 75.
  2. Mandahl-Barth, G. (1954). The freshwater mollusks of Uganda and adjacent territories. Sciences Zoologiques 32: 206 pp.
  3. Merritt, R. W., & Cummins, K. W. (1997). An introduction to the aquatic insects of North America (3rd ed.). Dubuque: Kendall/Hunt Publishing Co. 720 Pages. Pennak, R. W. (1953). Fresh-water invertebrates of the United States. New York: The Ronald Press Company.
  4. Pennak, R.W. 1953. Fresh-water invertebrates of the United States.

Metadatos adicionales