Carbon and nitrogen stable isotope values for lake trout from 6 different Arctic lakes near Toolik, Arctic LTER 1987 to 1988.

Abstract: 

Lake trout were analysed for carbon and nitrogen stable isotope values in 6 Arctic lakes near Toolik Lake at the Arctic LTER in 1987 and 1988. The fish were also analysed for age using otoliths.

Project Keywords: 

Data set ID: 

319

EML revision ID: 

8

Short name: 

1987-88_LkTrout_Isotopes

DOI: 

10.6073/pasta/ff68d691c59fbfb0b0c37903be1131b7
People

Keywords: 

Arctic LTER keywords: 

Taxa: 

Dates

Date Range: 

Friday, August 7, 1987 to Wednesday, June 29, 1988

Publication Date: 

Tuesday, December 12, 1989

Methods: 

All isotope samples are muscle tissue dried at 60 deg C. Total length and wet weight were measured in the field. Ages were calculated using otolith measurements.

Site Code: site of measurement
Date: in dd-mmm-yyyy
fishnum: reference number for each fish
del_15N: del 15N value per mil
del_13C: del 13C value per mil
length: total fish length in mm
weight: total wet weight in g
age: estimated fish age in years using otolith

CALCULATIONS
All isotope values are in per mil (o/oo) and are calculated as 13C or 15N (o/oo) = [(R sample/R standard)-1] x 1000, where R is (15N/14N) or (13C/12C). Results are reported versus atmospheric nitrogen or PDB as standards.

Field and Lab Methods and Protocols, Kling lab, University of Michigan

http://www-personal.umich.edu/~gwk

Sites sampled.

Download a comma delimited (csv) or Excel file (includes metadata and data sheets).

Use of the data requires acceptance of the data use policy --> Arctic LTER Data Use Policy

To cite this data set see the citation example on the LTER Network Data Portal page for this data set.

Variables Details

(Variables names are in the first line/row of the CSV file and Excel data sheet.)
Site Code
  • Label: Site Code
  • Definition: LTER site code
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
Lake
  • Label: Lake
  • Definition: Lake name
  • Type: Nominal
  • Missing values: None specified
Date
  • Label: Date
  • Definition: Date of fish capture
  • Type: Date/time
  • Date format: dd-mmm-yyyy
  • Missing values: None specified
Fishnum
  • Label: Fishnum
  • Definition: id assigned to fish
  • Type: Nominal
  • Missing values: None specified
del_15N
  • Label: del_15N
  • Definition: del 15N value
  • Type: Physical quantity
  • Unit: partPerThousand
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
del_13C
  • Label: del_13C
  • Definition: del 13C value
  • Type: Physical quantity
  • Unit: partPerThousand
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
length
  • Label: length
  • Definition: fish length
  • Type: Physical quantity
  • Unit: millimeter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
weight
  • Label: weight
  • Definition: fish weight
  • Type: Physical quantity
  • Unit: gram
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured
age
  • Label: age
  • Definition: estimated age of fish
  • Type: Physical quantity
  • Unit: number
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • . = Missing or Not Measured