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

Последняя версия опубликована Norwegian University of Science and Technology Aug 20, 2019 Norwegian University of Science and Technology

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 ((this dataset) is published separately from gill-net events and associated measurements. This dataset gives occurrence part of the dataset. Data on gill-net sampling, effort and temperature recordings are 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: Events" (UUID: a6cc334b-036a-43d0-ae68-3f84a08e8d97, Alternative Identifier: http://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes_events)

Записи данных

Данные этого occurrence ресурса были опубликованы в виде Darwin Core Archive (DwC-A), который является стандартным форматом для обмена данными о биоразнообразии в виде набора из одной или нескольких таблиц. Основная таблица данных содержит 5,701 записей. Также в наличии 1 таблиц с данными расширений. Записи расширений содержат дополнительную информацию об основной записи. Число записей в каждой таблице данных расширения показано ниже.

  • Occurrence (core)
    5701
  • MeasurementOrFact 
    32819

Данный экземпляр IPT архивирует данные и таким образом служит хранилищем (репозиторием) данных. Данные и метаданные ресурсов доступны для скачивания в разделе Загрузки. Перечень версий служит для отображения истории публикации версий данного ресурса.

Загрузки

Скачайте последнюю версию данных этого ресурса в формате Darwin Core Archive (DwC-A) или метаданных ресурса в форматах EML или RTF:

Данные в формате DwC-A Скачать 5,701 Записи в English (2 MB) - Частота обновления: unknown
Метаданные в формате EML Скачать в English (11 KB)
Метаданные в формате RTF Скачать в English (12 KB)

Версии

В таблице ниже указаны только опубликованные версии ресурса, которые доступны для свободного скачивания.

Как оформить ссылку

Исследователи должны дать ссылку на эту работу следующим образом:

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: Occurrences. v1.3. NTNU University Museum. Dataset/Occurrence. https://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes&v=1.3

Права

Исследователи должны соблюдать следующие права:

Публикующей организацией и владельцем прав на данную работу является Norwegian University of Science and Technology. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

Регистрация в GBIF

Этот ресурс был зарегистрирован в GBIF, ему был присвоен следующий UUID: 28c6444b-d35e-4863-a342-820a82ba63b7.  Norwegian University of Science and Technology отвечает за публикацию этого ресурса, и зарегистрирован в GBIF как издатель данных при оподдержке GBIF Norway.

Ключевые слова

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

Контакты

Кто является создателем ресурса:

Anders Gravbrøt Finstad
Associate Professor
Norwegian University of Science and Technology, Department of Natural History NO
Ole Kristian Berg
Professor
Norwegian Univeristy of Science and Technology, Department of Biology NO
Eva Ulvan
Research Tecnician
Norwegian Institute for Nature Research
Ingeborg Helland
Research Scientist
Norwegian Institute for Nature Research NO
Ola Ugedal
Senior Researcher
Norwegian Institute for Nature Resarch NO

Кто может ответить на вопросы о ресурсе:

Anders Gravbrøt Finstad
Associate Professor
Norwegian University of Science and Technology, Department of Natural History

Кем заполнены метаданные:

Anders Gravbrøt Finstad
Associate Professor
Norwegian University of Science and Technology, Department of Natural History NO

Кто еще связан с данным ресурсом:

User
Anders Gravbrøt Finstad

Географический охват

Central Scandinavia in a climate gradient from coast to inland.

Ограничивающие координаты Юг Запад [63.22, 9.33], Север Восток [64.94, 14.75]

Таксономический охват

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

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

Временной охват

Дата начала / Дата окончания 2008-07-01 / 2009-06-30

Методы сбора

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).

Охват исследования 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.

Описание этапа методики:

  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.

Дополнительные метаданные

Альтернативные идентификаторы 28c6444b-d35e-4863-a342-820a82ba63b7
https://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes