EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT
Two year groups (1+ and 2+; n = 10/group) of rainbow trout (Oncorhynchus mykiss) were sampled from a Danish marine fish farm. Fish were selected to span the same weight range (1+: 2643 - 3875 g; 2+: 2651 - 3912 g). During production (April to November) fish were fed identical commercial diets. Visua...
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doaj-e6548d9db2484d298fd2da6a19a5f0692020-11-25T00:21:45ZengSciendoCroatian Journal of Fisheries1330-061X1848-05862000-03-01581311EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUTB RønsholdtH NielsenJ FaergemandEwen McLeanTwo year groups (1+ and 2+; n = 10/group) of rainbow trout (Oncorhynchus mykiss) were sampled from a Danish marine fish farm. Fish were selected to span the same weight range (1+: 2643 - 3875 g; 2+: 2651 - 3912 g). During production (April to November) fish were fed identical commercial diets. Visual fat depots of faster and slower growing animals were examined by image analysis of directly scanned cutlets. No significant (P > 0.05) correlation between meat percentage and fish size (length, weight, condition factor, dressed weight) was found, and t-tests failed to expose any difference in fat: meat ratio between 1+ and 2+ yr old rainbow trout. However, a significant difference (P < 0.05) between variances for the two groups was observed, being approximately four-fold larger for 1+ yr animals compared to 2+ yr. This finding indicates that selection for faster growth results in less uniform products from a compositional perspective. Where specific product specifications should be met, this might complicate production management.http://ribarstvo.agr.hr/articles/75497_EVALUATION_OF_IMAGE_ANALYSIS_AS_A_METHOD_FOR_EXAMINING_CARCASS_COMPOSITION_OF_RAINBOW_TROUT_en.pdffatpigmentationmeat ratioproduct qualitygrowth rate |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
B Rønsholdt H Nielsen J Faergemand Ewen McLean |
spellingShingle |
B Rønsholdt H Nielsen J Faergemand Ewen McLean EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT Croatian Journal of Fisheries fat pigmentation meat ratio product quality growth rate |
author_facet |
B Rønsholdt H Nielsen J Faergemand Ewen McLean |
author_sort |
B Rønsholdt |
title |
EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT |
title_short |
EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT |
title_full |
EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT |
title_fullStr |
EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT |
title_full_unstemmed |
EVALUATION OF IMAGE ANALYSIS AS A METHOD FOR EXAMINING CARCASS COMPOSITION OF RAINBOW TROUT |
title_sort |
evaluation of image analysis as a method for examining carcass composition of rainbow trout |
publisher |
Sciendo |
series |
Croatian Journal of Fisheries |
issn |
1330-061X 1848-0586 |
publishDate |
2000-03-01 |
description |
Two year groups (1+ and 2+; n = 10/group) of rainbow trout (Oncorhynchus mykiss) were sampled from a Danish marine fish farm. Fish were selected to span the same weight range (1+: 2643 - 3875 g; 2+: 2651 - 3912 g). During production (April to November) fish were fed identical commercial diets. Visual fat depots of faster and slower growing animals were examined by image analysis of directly scanned cutlets. No significant (P > 0.05) correlation between meat percentage and fish size (length, weight, condition factor, dressed weight) was found, and t-tests failed to expose any difference in fat: meat ratio between 1+ and 2+ yr old rainbow trout. However, a significant difference (P < 0.05) between variances for the two groups was observed, being approximately four-fold larger for 1+ yr animals compared to 2+ yr. This finding indicates that selection for faster growth results in less uniform products from a compositional perspective. Where specific product specifications should be met, this might complicate production management. |
topic |
fat pigmentation meat ratio product quality growth rate |
url |
http://ribarstvo.agr.hr/articles/75497_EVALUATION_OF_IMAGE_ANALYSIS_AS_A_METHOD_FOR_EXAMINING_CARCASS_COMPOSITION_OF_RAINBOW_TROUT_en.pdf |
work_keys_str_mv |
AT brønsholdt evaluationofimageanalysisasamethodforexaminingcarcasscompositionofrainbowtrout AT hnielsen evaluationofimageanalysisasamethodforexaminingcarcasscompositionofrainbowtrout AT jfaergemand evaluationofimageanalysisasamethodforexaminingcarcasscompositionofrainbowtrout AT ewenmclean evaluationofimageanalysisasamethodforexaminingcarcasscompositionofrainbowtrout |
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