說明
The dataset presents zooplankton taxa presence and absence occurrence records obtained from monitoring cage fish culturing Farm, conducted from 2011 to 2020 in the northern Lake Victoria, Napoleon Gulf. Both areal and volumetric abundance data is provided for the present taxa, three major transects were followed; Downstream cages, within cages and Upstream cages with two reference sites. Part of this work was published by Mwebaza-Ndawula et al., (2013)
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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。:
Kiggundu V, Egessa R, Mwebaza-Ndawula L (2020): Zooplankton taxa occurrences and composition associated with a cage aquaculture farm on Lake Victoria, Uganda. v1.0. National Fisheries Resources Research Institute. Dataset/Occurrence. http://ipt-uganda.gbif.fr/resource?r=nafirri-son&v=1.0
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 Non Commercial (CC-BY-NC 4.0) License.
GBIF 註冊
此資源已向GBIF註冊，並指定以下之GBIF UUID: a93cc450-f6b9-4f5d-9b12-c49013cf4c79。 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
Occurrence; Zooplankton; Cage aquaculture; Lake Victoria; Uganda; Observation
聯絡資訊
- 元數據提供者 ●
- 出處
- 出處
- 出處
- 使用者 ●
- 連絡人
- 連絡人
地理涵蓋範圍
The study area was in Napoleon Gulf, Northern part of Lake Victoria (Ugandan portion). Intensive fish cage farming is on the increase in this portion of the lake.
| 界定座標範圍 | 緯度南界 經度西界 [0.383, 33.186], 緯度北界 經度東界 [0.442, 33.26] |
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分類群涵蓋範圍
Freshwater zooplankton retained in a plankton (Nansen) net of 60µm mesh size
| Class | Hexanauplia |
|---|---|
| Family | Calanoidae, Cyclopoidae |
| Genus | Afrocyclops, Ascomorpha, Asplanchna, Cephalodella, Chydorus, Euclanis, Hexathra, Macrothrix, Mesocyclops, Synchaeta, Trichocerca |
| Species | Bosmina longirostris, Brachionus angularis, Brachionus bidentata, Brachionus budapestinensis, Brachionus calyciflorus, Brachionus caudatus, Brachionus dimidiatus, Brachionus falcatus, Brachionus forficula, Brachionus patulus, Brachionus plicatilis, Ceriodaphnia cornuta, Ceriodaphnia dubia, Daphnia longispina, Daphnia lumholtzi, Diaphanosoma excisum, Filinia longiseta, Filinia opoliensis, Keratella cochlearis, Keratella tropica, Lecane bulla, Lecane luna, Moina micrura, Polyarthra vulgaris, Synchaeta pectinata, Thermocyclops decipiens, Thermocyclops emini, Thermocyclops incisus, Thermocyclops neglectus, Thermocyclops oblongatus, Thermodiaptomus galeboides, Trichocerca cylindrica, Tropocyclops confinnis, Tropocyclops tenellus |
時間涵蓋範圍
| 彙整期間 | 2011-2020 |
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計畫資料
The growing of fish in cages is a new venture in Uganda, and was first established in 2010 in Napoleon Gulf by Source of Nile Fish (SON) farm. This work is part of an ongoing quarterly monitoring of the SON fish cages. The data presented provide useful baseline information on cage fish farming on Lake Victoria.
| 計畫名稱 | Monitoring impacts of established fish cages at the SON Fish farm |
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| 經費來源 | SON fish farm Limited |
| 研究區域描述 | The study area was in Napoleon Gulf, Northern part of Lake Victoria (Ugandan portion) |
| 研究設計描述 | Monitoring sampling is being done on a quarterly basis with three major transects; downstream, within and upstream of cages from 2011 to current. In the data, the transects are described in location remarks. For more information on the research design, see Egessa et al. (2018). |
參與計畫的人員:
取樣方法
Zooplankton samples were collected with a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column, as described by Mwebaza-Ndawula (1994). 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.
| 研究範圍 | An annual quarterly monitoring sampling is ongoing since 2011 and the current data presents datasets from 2011 to June 2020 for Napoleon Gulf, northern Lake Victoria. Three transects; downstream, within, and upstream cages, with accompanying control point sites were established. However, the sampling design has so far been distorted due to changes in cage setup and expansion of cages within the Napoleon Gulf. |
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| 品質控管 | Some zooplankton were able to be identified to species level using published taxonomic keys (Sars 1895; Pennak 1953; Brooks 1957; Rutner-Kolisko 1974; Koste 1978; Boxshall & Braide 1991; Korinek 1999). Taxonomic names were cross-checked using the World Register of Marine Species (WoRMS). Volume densities of organisms were calculated from the counts data, with reference to the sample net mouth diameter and water column depth at each sampling site (Mwebaza-Ndawula, 1998). |
方法步驟描述:
- Collection of the zooplankton In the field, a conical plankton net (Nansen type; mesh size 60 µm; mouth diameter 0.25 m), towed vertically through the water column to have an integrated sample. Three hauls were taken per site and were combined to make a composite sample.
- Preserving the samples The composite sample was preserved with sugar-formalin mixture. The sugar was to stop the ballooning of cladocerans for easy identification.
- 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 (Mwebaza-Ndawula, 1998)
引用文獻
- 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.
- Brooks, J. L. 1957. The systematics of North American Daphnia. Memoirs of the connecticut academy of Arts and Sciences, 13, 1-18.
- Kashindye, B. B., Nsinda, P., Kayanda, R., Ngupula, G. W., Mashafi, C. A. & Ezekiel, C. N. 2015. Environmental impacts of cage culture in Lake Victoria: the case of Shirati Bay-Sota, Tanzania. SpringerPlus, 4, 1-15.
- 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.
- Koste, W. 1978. Rotatoria. Die Radertiere Mitteleuropas. Ein Bestimmungwerk, begrundet vo Max Voig. Uberrordnung Monogononta. Gebruder Borntraeger, Berlin, Stuttgart.
- Mwebaza-Ndawula, L. 1998. Distribution, abundance of zooplankton and Rastrineobola argentea (Pisces: Cyprinidae) and their trophic interactions in northern Lake Victoria, East Africa. , University of Vienna, Austria, Unpublished Ph.D. Thesis.
- Mwebaza-Ndawula, L., Kiggundu, V., Magezi, G., Naluwayiro, J., Ghandhi-Pabire, W. & Ocaya, H. 2013. Effects of cage fish culture on water quality and selected biological communities in northern Lake Victoeia, Uganda. Uganda Journal of Agricultural Sciences, 14, 61-75.
- Pennak, R. W. 1953. Fresh-water invertebrates of the United States, New York, John Wiley & Sons.
- Rutner-Kolisko, A. 1974. Planktonic rotifers: Biology and taxonomy, Biological Station Lunz of the Austrian Academy of Science. E. Schweizerbart’sche Verlagsbuchhandlung.
- Rzoska, J. 1957. Notes on the crustacean plankton of Lake Victoria. proc. Linn. Soc. Lond, 168, 1126-125.
- Sars, G. O. 1895. An account of the Crustacea of Norway, Christiania and Copenhagen Alb. Cammermeyer Forlag
- Vincent, K., Mwebaza-Ndawula, L., Makanga, B. & Nachuha, S. 2012. Variations in zooplankton community structure and water quality conditions in three habitat types in northern Lake Victoria. Lakes & Reservoirs: Research & Management, 17, 83-95.
- Egessa, R., Pabire, G. W., & Ocaya, H. (2018). Benthic macroinvertebrate community structure in Napoleon Gulf, Lake Victoria: effects of cage aquaculture in eutrophic lake. Environmental monitoring and assessment, 190(3), 112.