說明
This dataset presents occurences and abundance of macroinvertebrate taxa recorded in sites in relation to a cage fish farm in Lake Victoria, Uganda
資料紀錄
此資源sampling event的資料已發佈為達爾文核心集檔案（DwC-A），其以一或多組資料表構成分享生物多樣性資料的標準格式。 核心資料表包含 1,462 筆紀錄。
亦存在 1 筆延伸集的資料表。延伸集中的紀錄補充核心集中紀錄的額外資訊。 每個延伸集資料表中資料筆數顯示如下。
此 IPT 存放資料以提供資料儲存庫服務。資料與資源的詮釋資料可由「下載」單元下載。「版本」表格列出此資源的其它公開版本，以便利追蹤其隨時間的變更。
版本
以下的表格只顯示可公開存取資源的已發布版本。
如何引用
研究者應依照以下指示引用此資源。:
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
權利
研究者應尊重以下權利聲明。:
此資料的發布者及權利單位為 National Fisheries Resources Research Institute。 This work is licensed under a Creative Commons Attribution (CC-BY 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: 6cef8c28-b4dd-4082-af20-57cdc660a5bd。 National Fisheries Resources Research Institute 發佈此資源，並經由GBIF Uganda同意向GBIF註冊成為資料發佈者。
關鍵字
Sampling event; macro-invertebrates; Uganda; Lake Victoria; Cage aquaculture
聯絡資訊
- 元數據提供者 ●
- 出處 ●
- 連絡人
- 出處
- 出處
- 出處 ●
- 連絡人
- 出處
地理涵蓋範圍
The geographical area covers the location of the cage fish farm where data was collected.
| 界定座標範圍 | 緯度南界 經度西界 [0.403, 33.191], 緯度北界 經度東界 [0.411, 33.208] |
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分類群涵蓋範圍
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 |
|---|---|
| Family | Baetidae, Ceratopogonidea, Chironomidae, Heptageniidae, Leptoceridae, Libellulidae, Perlidae |
| Subfamily | Chironominea |
| Genus | Ablabesmyia, Aspatheria, Biomphalaria, Bulinus, Caenis, Chaoborus, Chironomus, Clinotanypus, Cryptochironomus, Dipsuedopsis, Economus, Ephemerella, Euthraulus, Ictinogomphus, Phyllomacomia, Procladius, Pseudoneureclipsis, Sphaerium, Tanypus, Tanytarsus, Terithemis, Tricorythus |
| Species | 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 |
時間涵蓋範圍
| 彙整期間 | 2011-current |
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計畫資料
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.
| 計畫名稱 | Environmental monitoring of Source of the Nile (SON) cage fish farm in Napoleon Gulf, northern Lake Victoria |
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| 經費來源 | Funding is provided by Source of the Nile Fish Farm Limited |
| 研究區域描述 | 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). |
| 研究設計描述 | 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. |
參與計畫的人員:
- 典藏經理
- 研究主持人
- 研究主持人
取樣方法
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).
| 研究範圍 | 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. |
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| 品質控管 | 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. |
方法步驟描述:
- 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.
引用文獻
- 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.
- Mandahl-Barth, G. (1954). The freshwater mollusks of Uganda and adjacent territories. Sciences Zoologiques 32: 206 pp.
- 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.