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פותח על ידי קלירמאש פתרונות בע"מ -
The effect of density of Macrobrachium rosenbergii raised in earthen ponds on their population structure and weight distribution
Year:
1986
Source of publication :
Aquaculture (source)
Authors :
הלוי, אמיר
;
.
וולפרט, גיורא
;
.
חולתא, גדעון
;
.
קרפלוס, אילן
;
.
Volume :
52
Co-Authors:
Karplus, I., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Hulata, G., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Wohlfarth, G.W., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Halevy, A., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Facilitators :
From page:
307
To page:
320
(
Total pages:
14
)
Abstract:
The population structure and weight distribution of Macrobrachium rosenbergii raised in earthen ponds in polyculture with fish were studied. Over 10 000 prawns were grown in 12 ponds stocked with 1, 2, 3 or 4 prawns per m2. Females were more abundant than males in all of the treatments. The proportions of three different male morphotypes, blue claw, orange claw and small males, changed with density but those of the female morphotypes did not. A detailed analysis of prawn weight distribution (mean, coefficient of variation and skewness) was carried out separately for each sex and for the morphotypes within each sex. Prawn survival was approximately 85%, independent of prawn density. Yield increased and mean prawn size decreased with prawn density. The most profitable density was 2 prawns per m2. The biological mechanisms controlling variation in sex ratio and morphotype frequency and the social control of growth are discussed. © 1986.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0044-8486(86)90373-X
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
23818
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:02
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Scientific Publication
The effect of density of Macrobrachium rosenbergii raised in earthen ponds on their population structure and weight distribution
52
Karplus, I., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Hulata, G., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Wohlfarth, G.W., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
Halevy, A., Agricultural Research Organization, Fish and Aquaculture Research Station, Dor, D.N. Hof Hacarmel 30820, Israel
The effect of density of Macrobrachium rosenbergii raised in earthen ponds on their population structure and weight distribution
The population structure and weight distribution of Macrobrachium rosenbergii raised in earthen ponds in polyculture with fish were studied. Over 10 000 prawns were grown in 12 ponds stocked with 1, 2, 3 or 4 prawns per m2. Females were more abundant than males in all of the treatments. The proportions of three different male morphotypes, blue claw, orange claw and small males, changed with density but those of the female morphotypes did not. A detailed analysis of prawn weight distribution (mean, coefficient of variation and skewness) was carried out separately for each sex and for the morphotypes within each sex. Prawn survival was approximately 85%, independent of prawn density. Yield increased and mean prawn size decreased with prawn density. The most profitable density was 2 prawns per m2. The biological mechanisms controlling variation in sex ratio and morphotype frequency and the social control of growth are discussed. © 1986.
Scientific Publication
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