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

Última versión Publicado por Norwegian University of Science and Technology en 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 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)

Registros

Los datos en este evento de muestreo recurso han sido publicados como Archivo Darwin Core(DwC-A), el cual es un formato estándar para compartir datos de biodiversidad como un conjunto de una o más tablas de datos. La tabla de datos del core contiene 1,386 registros. también existen 1 tablas de datos de extensiones. Un registro en una extensión provee información adicional sobre un registro en el core. El número de registros en cada tabla de datos de la extensión se ilustra a continuación.

  • Event (core)
    1386
  • MeasurementOrFact 
    9284

Este IPT archiva los datos, sirviendo así como repositorio de datos. Los datos y metadatos están disponibles para descargar en la sección de descargas. La tabla de versiones muestra otras versiones del recurso que se han hecho accesibles al público y permite el seguimiento de los cambios hechos al recurso en el tiempo.

Descargas

Descargue la última versión de los datos como un Archivo Darwin Core (DwC-A) o los metadatos como EML o RTF:

Datos como un archivo DwC-A descargar 1,386 registros en Inglés (352 KB) - Frecuencia de actualización: desconocido
Metadatos como un archivo EML descargar en Inglés (11 KB)
Metadatos como un archivo RTF descargar en Inglés (12 KB)

Versiones

La siguiente tabla muestra sólo las versiones publicadas del recurso que son de acceso público.

¿Cómo referenciar?

Los usuarios deben citar este trabajo de la siguiente manera:

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

Derechos

Los usuarios deben respetar los siguientes derechos de uso:

El publicador y propietario de los derechos de este trabajo es Norwegian University of Science and Technology. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License.

Registro GBIF

Este recurso ha sido registrado en GBIF con el siguiente UUID: a6cc334b-036a-43d0-ae68-3f84a08e8d97.  Norwegian University of Science and Technology publica este recurso, y está registrado en GBIF como un publicador de datos avalado por GBIF Norway.

Palabras Clave

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

Contactos

¿Quién creó el recurso?:

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

¿Quién puede resolver dudas acerca del recurso?:

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

¿Quién documentó los metadatos?:

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

¿Quién más está asociado con el recurso?:

Usuario
Anders Gravbrøt Finstad

Cobertura Geográfica

Central Scandinavia in a climate gradient from coast to inland.

Coordenadas límite Latitud Mínima Longitud Mínima [63.22, 9.33], Latitud Máxima Longitud Máxima [64.94, 14.75]

Cobertura Taxonómica

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

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

Cobertura Temporal

Fecha Inicial / Fecha Final 2008-07-01 / 2009-06-30

Métodos de Muestreo

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).

Área de Estudio 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.

Descripción de la metodología paso a paso:

  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.

Metadatos Adicionales

Identificadores Alternativos a6cc334b-036a-43d0-ae68-3f84a08e8d97
https://gbif.vm.ntnu.no/ipt/resource?r=gillnet_fishing_from_20_central_scandinavian_lakes_events