Descrição
This dataset provides the occurrence, distribution, and abundance or composition of benthic macro-invertebrates collected through trawl surveys conducted on Lake Victoria, Uganda. The overall objective of the trawl surveys conducted overtime has been to examine composition, distribution and abundance patterns of benthic macro-invertebrates in order to determine ecosystem health in relation to fisheries.
Registros de Dados
Os dados deste recurso de ocorrência foram publicados como um Darwin Core Archive (DwC-A), que é o formato padronizado para compartilhamento de dados de biodiversidade como um conjunto de uma ou mais tabelas de dados. A tabela de dados do núcleo contém 10.107 registros.
This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for download in the downloads section. The versions table lists other versions of the resource that have been made publicly available and allows tracking changes made to the resource over time.
Versões
A tabela abaixo mostra apenas versões de recursos que são publicamente acessíveis.
Como citar
Pesquisadores deveriam citar esta obra da seguinte maneira:
Pabire W G, Musinguzi L, Natugonza V, Egessa R, Mwebaza-Ndawula L (2019): Taxa occurrence (presence/absence) and composition of benthic macroinvertebrates from trawl surveys (2003-2017) conducted on Lake Victoria, Uganda. v1.2. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=macroinvertebratestrawl&v=1.2
Direitos
Pesquisadores devem respeitar a seguinte declaração de direitos:
O editor e o detentor dos direitos deste trabalho é National Fisheries Resources Research Institute. This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF Registration
Este recurso foi registrado no GBIF e atribuído ao seguinte GBIF UUID: 1882cf98-ecdb-4217-9fb7-7b6a02bc0ebf. National Fisheries Resources Research Institute publica este recurso, e está registrado no GBIF como um publicador de dados aprovado por GBIF Uganda.
Palavras-chave
Occurrence; Presence; Absence; Macroinvertebtrates; Lake Victoria; Uganda; Observation
Contatos
- Provedor Dos Metadados ●
- Originador ●
- Ponto De Contato
- Ponto De Contato
- Originador
- Originador
- Originador
- Ponto De Contato
Cobertura Geográfica
The dataset covers Lake Victoria, Uganda.
| Coordenadas delimitadoras | Sul Oeste [-1,066, 31,663], Norte Leste [0,505, 33,959] |
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Cobertura Taxonômica
This dataset covers aquatic macro-invertebrates
| Class | Hirudinea, Oligochaeta, Ostracoda |
|---|---|
| Família | Aeschenidae, Economidae, Ephemeridae, Gomphidae, Leptoceridae, Libellulidae, Philopotamidae |
| Gênero | Ablabesmyia, Aspatheria, Bulinus, Caelatura, Caenis, Chaoborus, Chironomus, Clinotanypus, Cryptochironomus, Pisidium, Procladius, Pseudoneureclipsis, Sphaerium, Tanypus, Tanytarsus |
| Espécie | Povilla adusta, Bellamya unicolor, Byssanodonta parasitica, Caelatura alluaudi, Caelatura hauttecoeuri, Caelatura monceti, Caridina nilotica, Corbicula africana, Gabbia humerosa, Melanoides tuberculata, Mutela bourguignati, Povilla adusta |
Cobertura Temporal
| Período de Formação | 2003-current |
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Dados Sobre o Projeto
Nenhuma descrição disponível
| Título | Trawl surveys on Lake Victoria |
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| Descrição da Área de Estudo | The trawl surveys have been undertaken on Lake Victoria, Uganda. |
| Descrição do Design | Trawl surveys on Lake Victoria, Uganda are conducted in several transects. Ponar grab samples for benthic macro-invertebrates are taken at the end or beginning of each transect, presented by coordinates in the dataset. Three hauls of sediment are taken by the Ponar grab sampler of 238 cm2 at each sampling point and combined to make a composite sample. |
O pessoal envolvido no projeto:
- Originador
Métodos de Amostragem
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 sampling point. 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 4 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). De Moor et al. (2003).
| Área de Estudo | The datasets present data for trawl surveys conducted between 2003 and 2017. However, not all transects or years may be represented in the sample as depending on resources, sampling may not take place in some years or transects. |
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| Controle de Qualidade | 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. |
Descrição dos passos do método:
- 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 x 25 magnification.
Citações bibliográficas
- 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, 208Pp.
- 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 Pages. Pennak, R. W. (1953). Fresh-water invertebrates of the United States. New York: The Ronald Press Company.
- Pennak, R.W. 1953. Fresh-water invertebrates of the United States.
Metadados Adicionais
| Identificadores alternativos | 1882cf98-ecdb-4217-9fb7-7b6a02bc0ebf |
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| http://ipt-uganda.gbif.fr/resource?r=macroinvertebratestrawl |