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קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Polyculture of the freshwater prawn Machrobrachium rosenbergii in intensively manured ponds, and the effect of stocking rate of prawns and fish on their production characteristics
Year:
1985
Source of publication :
Aquaculture (source)
Authors :
הלוי, אמיר
;
.
וולפרט, גיורא
;
.
חולתא, גדעון
;
.
קרפלוס, אילן
;
.
Volume :
46
Co-Authors:
Wohlfarth, G.W., 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
Karplus, I., 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:
143
To page:
156
(
Total pages:
14
)
Abstract:
Polyculture of freshwater prawns with common carp, tilapias, and various Chinese carps was investigated in four tests, each carried out in 20 or more earthen ponds. In the first test, survival and growth rates of prawns were low in most of the experimental ponds. In three further tests, in which prawn stocking rate was varied over a total range of 5000 to 40 000 prawns per ha, high prawn survival and growth were obtained. Fish stocking varied between 8500 and 17 000 per ha, the major variable being tilapia stocking rate. The results showed that the growth and survival of fish and prawns are independent. Prawns were influenced only by their own stocking rate, which correlates positively with yield and negatively with individual growth. Prawns were not influenced by the species of fish co-stocked with them, the stocking rate of the fish, nor by differences in feeding or manuring regimes. Growth of fish was affected by their own stocking rates and by differences in the nutrient regime (particularly common carp) but not by prawn stocking rates. Fish yields obtained were close to 40 kg/ha per day, while those of prawns increased from 1.6 to 7.2 kg/ha per day with increasing stocking rate. Mean weight of prawns decreased (from 40 g to 24 g) as stocking rates increased and so did the proportion of prawns of marketable weight. For growth periods of 104 to 118 days, as in these tests, optimal prawn stocking rate appeared to be about 20 000/ha. Fish and prawn yields obtained were between 2.5 and 3 times higher than those in other prawn-fish polyculture studies carried out in temperate climates. High density stocking of common carp, tilapia hybrids, Chinese carps and prawns, with manure as the major nutrient input and supplemental feeds in relatively small amounts, is considered a rational aquaculture technique. © 1985.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0044-8486(85)90198-X
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
32162
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:07
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Scientific Publication
Polyculture of the freshwater prawn Machrobrachium rosenbergii in intensively manured ponds, and the effect of stocking rate of prawns and fish on their production characteristics
46
Wohlfarth, G.W., 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
Karplus, I., 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
Polyculture of the freshwater prawn Machrobrachium rosenbergii in intensively manured ponds, and the effect of stocking rate of prawns and fish on their production characteristics
Polyculture of freshwater prawns with common carp, tilapias, and various Chinese carps was investigated in four tests, each carried out in 20 or more earthen ponds. In the first test, survival and growth rates of prawns were low in most of the experimental ponds. In three further tests, in which prawn stocking rate was varied over a total range of 5000 to 40 000 prawns per ha, high prawn survival and growth were obtained. Fish stocking varied between 8500 and 17 000 per ha, the major variable being tilapia stocking rate. The results showed that the growth and survival of fish and prawns are independent. Prawns were influenced only by their own stocking rate, which correlates positively with yield and negatively with individual growth. Prawns were not influenced by the species of fish co-stocked with them, the stocking rate of the fish, nor by differences in feeding or manuring regimes. Growth of fish was affected by their own stocking rates and by differences in the nutrient regime (particularly common carp) but not by prawn stocking rates. Fish yields obtained were close to 40 kg/ha per day, while those of prawns increased from 1.6 to 7.2 kg/ha per day with increasing stocking rate. Mean weight of prawns decreased (from 40 g to 24 g) as stocking rates increased and so did the proportion of prawns of marketable weight. For growth periods of 104 to 118 days, as in these tests, optimal prawn stocking rate appeared to be about 20 000/ha. Fish and prawn yields obtained were between 2.5 and 3 times higher than those in other prawn-fish polyculture studies carried out in temperate climates. High density stocking of common carp, tilapia hybrids, Chinese carps and prawns, with manure as the major nutrient input and supplemental feeds in relatively small amounts, is considered a rational aquaculture technique. © 1985.
Scientific Publication
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