Goherr: Fish consumption study

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Revision as of 10:04, 12 April 2017 by Jouni (talk | contribs) (Bayes model)
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Question

How Baltic herring and salmon are used as human food in Baltic sea countries? Which determinants affect on people’s eating habits of these fish species?

Answer

Survey data will be analysed during winter 2016-2017 and results will be updated here.

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Rationale

Survey of eating habits of Baltic herring and salmon in Denmark, Estonia, Finland and Sweden has been done in September 2016 by Taloustutkimus oy. Content of the questionnaire can be accessed in Google drive. The actual data will be uploaded to Opasnet base on Octobere 2016.

The R-code to analyse the survey data will be provided on this page later on.

Data

Original datafile File:Goherr fish consumption.csv

Preprocessing

This code is used to preprocess the original questionnaire data from the above .csv file and to store the data as a usable variable to Opasnet base.

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Analyses

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Correlation matrix of all questions in the survey (answers converted to numbers).

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Bayes model

  • Model run 3.3.2017. All variables assumed independent. [1]
  • Model run 3.3.2017. p has more dimensions. [2]
  • Model run 25.3.2017. Several model versions: strange binomial+multivarnormal, binomial, fractalised multivarnormal [3]
  • Model run 27.3.2017 [4]
  • Other models except multivariate normal were archived and removed from active code 29.3.2017.
  • Model run 29.3.2017 with raw data graphs [5]
  • Model run 29.3.2017 with salmon and herring ovariables stored [6]

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Calculations

This code calculates how much (g/day) Baltic herring and salmon are eaten based on an Bayesian model build up based on the questionnaire data.

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Assumptions

The following assumptions are used:

Assumptions for calculations(-)
ObsVariablevalueExplanationResult
1freq6times per year260 - 364
2freq5times per year104 - 208
3freq4times per year52
4freq3times per year12 - 36
5freq2times per year2 - 5
6freq1times per year0.5 - 0.9
7freq0times per year0
8amdish0grams / serving20 - 50
9amdish1grams / serving70 - 100
10amdish2grams / serving120 - 150
11amdish3grams / serving170 - 200
12amdish4grams / serving220 - 250
13amdish5grams / serving270 - 300
14amdish6grams / serving450 - 500
15ingridientfraction0.1 - 0.3
16amside0grams / serving20 - 50
17amside1grams / serving70 - 100
18amside2grams / serving120 - 150
19amside3grams / serving170 - 200
20amside4grams / serving220 - 250

Questionnaire


Dependencies

The survey data will be used as input in the benefit-risk assessment of Baltic herring and salmon intake, which is part of the WP5 work in Goherr-project.

Formula

See also

Keywords

References


Related files

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Goherr: Fish consumption study. Opasnet . [7]. Accessed 17 May 2024.