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פותח על ידי קלירמאש פתרונות בע"מ -
Predicting correction factors for differences in initial weight among genetic groups of common carp in communal testing
Year:
1987
Source of publication :
Aquaculture (source)
Authors :
וולפרט, גיורא
;
.
מילשטיין, אנה
;
.
Volume :
60
Co-Authors:
Wohlfarth, G.W., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Milstein, A., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Facilitators :
From page:
13
To page:
25
(
Total pages:
13
)
Abstract:
Testing different genetic groups of common carp by stocking them together into 'communal ponds', requires correcting observed weight gains for differences in initial weight among the tested groups. Reliable estimation of correction factors, by the multiple nursing technique, requires a minimum difference of 15 g in initial weight between multiply nursed samples. Empirical estimates of correction factors are biassed by errors in estimating initial weight differences. No consistent differences were isolated in the correction factors generated from different genetic groups. A multiple regression analysis based on data from ten tests generated the following prediction equation: b=4.543-0.113 X.+0.00671 Y. (R=0.716) where b=predicted correction factor; X.=mean initial weight; Y.=mean weight gain. Predicted correction factors, generated from the analysis of a large set of data, are at least as reliable as empirical estimates from a single experiment. Their use enables an economy in facilities, which would otherwise be required for producing and testing multiply nursed samples. The application of this technique to other fish species is discussed. © 1987.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0044-8486(87)90354-1
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23289
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:58
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Scientific Publication
Predicting correction factors for differences in initial weight among genetic groups of common carp in communal testing
60
Wohlfarth, G.W., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Milstein, A., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Predicting correction factors for differences in initial weight among genetic groups of common carp in communal testing
Testing different genetic groups of common carp by stocking them together into 'communal ponds', requires correcting observed weight gains for differences in initial weight among the tested groups. Reliable estimation of correction factors, by the multiple nursing technique, requires a minimum difference of 15 g in initial weight between multiply nursed samples. Empirical estimates of correction factors are biassed by errors in estimating initial weight differences. No consistent differences were isolated in the correction factors generated from different genetic groups. A multiple regression analysis based on data from ten tests generated the following prediction equation: b=4.543-0.113 X.+0.00671 Y. (R=0.716) where b=predicted correction factor; X.=mean initial weight; Y.=mean weight gain. Predicted correction factors, generated from the analysis of a large set of data, are at least as reliable as empirical estimates from a single experiment. Their use enables an economy in facilities, which would otherwise be required for producing and testing multiply nursed samples. The application of this technique to other fish species is discussed. © 1987.
Scientific Publication
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