Gillnet test fishing and radiocaesium (Cs-137) of brown trout (Salmo trutta) and Arctic char (Salvelinus aplinus) 2008 and 2009 from 20 Central Scandinavian lakes: Events

Sampling event
最新版本 published by Norwegian University of Science and Technology on 8月 20, 2019 Norwegian University of Science and Technology
發布日期:
2019年8月20日
授權條款:
CC-BY 4.0

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DwC-A資料集 下載 1,386 紀錄 在 English 中 (360 KB) - 更新頻率: 有可能更新,但不確知何時
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說明

Brown trout (Salmo trutta) and Arctic char (Salvelinus alpinus) were sampled in 20 lakes located along an altitudinal gradient (36 - 850 m.a.s.l.) in central Scandinavia. 10 of these lakes where trout only populations (allopatric) and in 10 trout and char co-existed. In addition, Three spined stickleback (Gasterosteus aculeatus L.) and European eel (Anguilla Anguilla L) co-occurs in most lakes below the marine transgression line. However, these species where not collected using the present gill-net series. Also, two of the lakes (Slipstikken and Grisbakktjørna) had a scares population of burbot (Lota lota L.) (catch of burbot not recorded). The sympatric lakes, with the exception of Kjerråtjønnin were sampled three times (spring 2008 – autumn 2008 – spring 2009), and the allopatric lakes were sampled two times (autumn 2008 – spring 2009). Autumn samples were collected just before ice formation and spring samples in 2008 somewhat after and 2009 just after ice breakup. At each sampling period fish were sampled with bottom gill nets (1.5 m x 25 m) with bar mesh sizes of 12.5 – 16 – 19.5 - 24 – 29 – 35 mm. Three and three nets were linked together making chains with alternating mesh sizes in order to represent all mesh sizes at different depths in each lake at each sampling period. Depths were measured at the start and end of each net. The gillnet chains were set perpendicular to the shore in the evening and hauled the next morning. The fish were frozen in plastic bags and stored at -25 °C. In the laboratory, wet mass (precision 0.1 g), fork length (precision 1 mm), sex, parasite load and maturation stage (Dahl 1917) were determined. Scale (trout) and otolith (char) samples were taken and used for age determination. In a subsample of the fish the contents of the oesophagus and the stomach were identified to various taxonomic levels and grouped into seven categories: surface insects, chironomidae, mollusca, benthic insects, benthic crustaceans, zooplankton and fish. Stomach contents and each individual fish were dried, and homogenized before quantifying 137Cs by gamma counting the samples in an integral, well-type, NaI-scintillation detector (LKBWallac Compugamma). Due to current restrictions with the DwC-A format, data and associated measurements on individual fish is published separately from gill-net events and associated measurements (this dataset). This DwC-A gives the event part of the dataset. Data on occurrences and measurements and traits of individual fish is given in a separate dataset ("Gillnet test fishing and radiocaesium (Cs-137) of brown trout (Salmo trutta) and Arctic char (Salvelinus aplinus) 2008 and 2009 from 20 Central Scandinavian lakes: Occurrences" (UUID: 28c6444b-d35e-4863-a342-820a82ba63b7, Alternative Identifier: http://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes)

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 1,386 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。

Event (核心)
1386
MeasurementOrFact 
9284

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。:

Finstad A G, Berg O K, Ulvan E, Helland I, Ugedal O (2019): Gillnet test fishing and radiocaesium (Cs-137) of brown trout (Salmo trutta) and Arctic char (Salvelinus aplinus) 2008 and 2009 from 20 Central Scandinavian lakes: Events. v1.3. NTNU University Museum. Dataset/Samplingevent. https://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes_events&v=1.3

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 Norwegian University of Science and Technology。 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: a6cc334b-036a-43d0-ae68-3f84a08e8d97。  Norwegian University of Science and Technology 發佈此資源,並經由GBIF Norway同意向GBIF註冊成為資料發佈者。

關鍵字

gill-net; radioccaesium; freswhater; lakes; fish; Metadata

聯絡資訊

Anders Gravbrøt Finstad
  • 元數據提供者
  • 出處
  • 使用者
  • 連絡人
Associate Professor
Norwegian University of Science and Technology, Department of Natural History
NO
Ole Kristian Berg
  • 出處
Professor
Norwegian Univeristy of Science and Technology, Department of Biology
NO
Eva Ulvan
  • 出處
Research Tecnician
Norwegian Institute for Nature Research
Ingeborg Helland
  • 出處
Research Scientist
Norwegian Institute for Nature Research
NO
Ola Ugedal
  • 出處
Senior Researcher
Norwegian Institute for Nature Resarch
NO

地理涵蓋範圍

Central Scandinavia in a climate gradient from coast to inland.

界定座標範圍 緯度南界 經度西界 [63.22, 9.33], 緯度北界 經度東界 [64.94, 14.75]

分類群涵蓋範圍

Arctic char (Salvelinus alpinus) and brown trout (Salmo trutta)identified to species.

Species Salvelinus alpinus (Arctic char), Salmo trutta (brown trout)

時間涵蓋範圍

起始日期 / 結束日期 2008-07-01 / 2009-06-30

取樣方法

At each sampling period fish were sampled with bottom gill nets (1.5 m x 25 m) with bar mesh sizes of 12.5 – 16 – 19.5 - 24 – 29 – 35 mm (Ugedal gill-net series). Three and three nets were linked together with the order of mesh sizes randomized once. Each event represent a single gill-net, with parent event referring to the gill-net chain (Ugedal series). Depths were measured at the start and end of each net. The net where set in the evening and pulled the next morning (exact time not recorded). The eventDate field represent the day of pulling the nets (i.e. the day of the sampling of the fish).

研究範圍 Lakes where sampled two or three times (spring 2008 – autumn 2008 – spring 2009. Autumn samples were collected just before ice formation and spring samples in 2008 somewhat after and 2009 just after ice breakup.

方法步驟描述:

  1. Data where entered on paper forms in field or in lab, and punched on Microsoft xl spreadsheets. Manual control of the entered data where undertaken subsequently.

額外的詮釋資料